From 2b190108de64ee0b70da0a05cade3800897e22a6 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Wed, 19 Dec 2018 16:36:47 -0500
Subject: [PATCH 01/17] Refine Order for Web3 compat. & add conversions

Changed some of the fields in the Order class so that it can be passed
to our contracts via Web3.

Added conversion utilities so that an Order can be easily converted to
and from a JSON-compatible dict (specifically by encoding/decoding the
`bytes` fields), to facilitate validation against the JSON schema.

Also modified JSON order schema to accept integers in addition to
stringified integers.
---
 .../schemas/whole_number_schema.json          |  11 +-
 .../src/zero_ex/order_utils/__init__.py       | 169 ++++++++++++++----
 .../test/test_generate_order_hash_hex.py      |   4 +-
 .../order_utils/test/test_json_schemas.py     |   6 +-
 4 files changed, 154 insertions(+), 36 deletions(-)

diff --git a/packages/json-schemas/schemas/whole_number_schema.json b/packages/json-schemas/schemas/whole_number_schema.json
index 944ce820ee..aa469954ca 100644
--- a/packages/json-schemas/schemas/whole_number_schema.json
+++ b/packages/json-schemas/schemas/whole_number_schema.json
@@ -1,5 +1,12 @@
 {
     "id": "/wholeNumberSchema",
-    "type": "string",
-    "pattern": "^\\d+$"
+    "anyOf": [
+        {
+            "type": "string",
+            "pattern": "^\\d+$"
+        },
+        {
+            "type": "integer"
+        }
+    ]
 }
diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index 24c6bfd4e8..b18e5bb0a8 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -10,9 +10,10 @@
 fence smart topic"``.
 """
 
+from copy import copy
 from enum import auto, Enum
 import json
-from typing import Dict, Tuple
+from typing import cast, Dict, Tuple
 from pkg_resources import resource_string
 
 from mypy_extensions import TypedDict
@@ -107,47 +108,154 @@ class SignatureType(Enum):
 
 
 class Order(TypedDict):  # pylint: disable=too-many-instance-attributes
-    """Object representation of a 0x order."""
+    """A Web3-compatible representation of the Exchange.Order struct."""
 
     makerAddress: str
     takerAddress: str
     feeRecipientAddress: str
     senderAddress: str
-    makerAssetAmount: str
-    takerAssetAmount: str
-    makerFee: str
-    takerFee: str
-    expirationTimeSeconds: str
-    salt: str
-    makerAssetData: str
-    takerAssetData: str
-    exchangeAddress: str
+    makerAssetAmount: int
+    takerAssetAmount: int
+    makerFee: int
+    takerFee: int
+    expirationTimeSeconds: int
+    salt: int
+    makerAssetData: bytes
+    takerAssetData: bytes
 
 
 def make_empty_order() -> Order:
     """Construct an empty order.
 
-    Initializes all strings to "0x0000000000000000000000000000000000000000"
-    and all numbers to 0.
+    Initializes all strings to "0x0000000000000000000000000000000000000000",
+    all numbers to 0, and all bytes to nulls.
     """
     return {
         "makerAddress": _Constants.null_address,
         "takerAddress": _Constants.null_address,
         "senderAddress": _Constants.null_address,
         "feeRecipientAddress": _Constants.null_address,
-        "makerAssetData": _Constants.null_address,
-        "takerAssetData": _Constants.null_address,
-        "salt": "0",
-        "makerFee": "0",
-        "takerFee": "0",
-        "makerAssetAmount": "0",
-        "takerAssetAmount": "0",
-        "expirationTimeSeconds": "0",
-        "exchangeAddress": _Constants.null_address,
+        "makerAssetData": (b"\x00") * 20,
+        "takerAssetData": (b"\x00") * 20,
+        "salt": 0,
+        "makerFee": 0,
+        "takerFee": 0,
+        "makerAssetAmount": 0,
+        "takerAssetAmount": 0,
+        "expirationTimeSeconds": 0,
     }
 
 
-def generate_order_hash_hex(order: Order) -> str:
+def order_to_jsdict(
+    order: Order, exchange_address="0x0000000000000000000000000000000000000000"
+) -> dict:
+    """Convert a Web3-compatible order struct to a JSON-schema-compatible dict.
+
+    More specifically, do explicit decoding for the `bytes` fields.
+
+    >>> import pprint
+    >>> pprint.pprint(order_to_jsdict(
+    ...     {
+    ...         'makerAddress': "0x0000000000000000000000000000000000000000",
+    ...         'takerAddress': "0x0000000000000000000000000000000000000000",
+    ...         'feeRecipientAddress':
+    ...             "0x0000000000000000000000000000000000000000",
+    ...         'senderAddress': "0x0000000000000000000000000000000000000000",
+    ...         'makerAssetAmount': 1,
+    ...         'takerAssetAmount': 1,
+    ...         'makerFee': 0,
+    ...         'takerFee': 0,
+    ...         'expirationTimeSeconds': 1,
+    ...         'salt': 1,
+    ...         'makerAssetData': (0).to_bytes(1, byteorder='big') * 20,
+    ...         'takerAssetData': (0).to_bytes(1, byteorder='big') * 20,
+    ...     },
+    ... ))
+    {'exchangeAddress': '0x0000000000000000000000000000000000000000',
+     'expirationTimeSeconds': 1,
+     'feeRecipientAddress': '0x0000000000000000000000000000000000000000',
+     'makerAddress': '0x0000000000000000000000000000000000000000',
+     'makerAssetAmount': 1,
+     'makerAssetData': '0x0000000000000000000000000000000000000000',
+     'makerFee': 0,
+     'salt': 1,
+     'senderAddress': '0x0000000000000000000000000000000000000000',
+     'takerAddress': '0x0000000000000000000000000000000000000000',
+     'takerAssetAmount': 1,
+     'takerAssetData': '0x0000000000000000000000000000000000000000',
+     'takerFee': 0}
+    """
+    jsdict = cast(Dict, copy(order))
+
+    # encode bytes fields
+    jsdict["makerAssetData"] = "0x" + order["makerAssetData"].hex()
+    jsdict["takerAssetData"] = "0x" + order["takerAssetData"].hex()
+
+    jsdict["exchangeAddress"] = exchange_address
+
+    assert_valid(jsdict, "/orderSchema")
+
+    return jsdict
+
+
+def jsdict_order_to_struct(jsdict: dict) -> Order:
+    r"""Convert a JSON-schema-compatible dict order to a Web3-compatible struct.
+
+    More specifically, do explicit encoding of the `bytes` fields.
+
+    >>> import pprint
+    >>> pprint.pprint(jsdict_order_to_struct(
+    ...     {
+    ...         'makerAddress': "0x0000000000000000000000000000000000000000",
+    ...         'takerAddress': "0x0000000000000000000000000000000000000000",
+    ...         'feeRecipientAddress': "0x0000000000000000000000000000000000000000",
+    ...         'senderAddress': "0x0000000000000000000000000000000000000000",
+    ...         'makerAssetAmount': 1000000000000000000,
+    ...         'takerAssetAmount': 1000000000000000000,
+    ...         'makerFee': 0,
+    ...         'takerFee': 0,
+    ...         'expirationTimeSeconds': 12345,
+    ...         'salt': 12345,
+    ...         'makerAssetData': "0x0000000000000000000000000000000000000000",
+    ...         'takerAssetData': "0x0000000000000000000000000000000000000000",
+    ...         'exchangeAddress': "0x0000000000000000000000000000000000000000",
+    ...     },
+    ... ))
+    {'expirationTimeSeconds': 12345,
+     'feeRecipientAddress': '0x0000000000000000000000000000000000000000',
+     'makerAddress': '0x0000000000000000000000000000000000000000',
+     'makerAssetAmount': 1000000000000000000,
+     'makerAssetData': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+                       b'\x00\x00\x00\x00\x00\x00\x00\x00',
+     'makerFee': 0,
+     'salt': 12345,
+     'senderAddress': '0x0000000000000000000000000000000000000000',
+     'takerAddress': '0x0000000000000000000000000000000000000000',
+     'takerAssetAmount': 1000000000000000000,
+     'takerAssetData': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+                       b'\x00\x00\x00\x00\x00\x00\x00\x00',
+     'takerFee': 0}
+    """  # noqa: E501 (line too long)
+    assert_valid(jsdict, "/orderSchema")
+
+    order = cast(Order, copy(jsdict))
+
+    def strip_0x(hex_string: str) -> str:
+        if hex_string.startswith("0x"):
+            return hex_string[2:]
+        return hex_string
+
+    order["makerAssetData"] = bytes.fromhex(strip_0x(jsdict["makerAssetData"]))
+    order["takerAssetData"] = bytes.fromhex(strip_0x(jsdict["takerAssetData"]))
+
+    del order["exchangeAddress"]  # type: ignore
+    # silence mypy pending release of
+    # https://github.com/python/mypy/issues/3550
+
+    return order
+
+
+def generate_order_hash_hex(order: Order, exchange_address: str) -> str:
     """Calculate the hash of the given order as a hexadecimal string.
 
     :param order: The order to be hashed.  Must conform to `the 0x order JSON schema <https://github.com/0xProject/0x-monorepo/blob/development/packages/json-schemas/schemas/order_schema.json>`_.
@@ -167,14 +275,15 @@ def generate_order_hash_hex(order: Order) -> str:
     ...         'takerFee': "0",
     ...         'expirationTimeSeconds': "12345",
     ...         'salt': "12345",
-    ...         'makerAssetData': "0x0000000000000000000000000000000000000000",
-    ...         'takerAssetData': "0x0000000000000000000000000000000000000000",
-    ...         'exchangeAddress': "0x0000000000000000000000000000000000000000",
+    ...         'makerAssetData': (0).to_bytes(1, byteorder='big') * 20,
+    ...         'takerAssetData': (0).to_bytes(1, byteorder='big') * 20,
     ...     },
+    ...     exchange_address="0x0000000000000000000000000000000000000000",
     ... )
     '55eaa6ec02f3224d30873577e9ddd069a288c16d6fb407210eecbc501fa76692'
     """  # noqa: E501 (line too long)
-    assert_valid(order, "/orderSchema")
+    assert_is_address(exchange_address, "exchange_address")
+    assert_valid(order_to_jsdict(order, exchange_address), "/orderSchema")
 
     def pad_20_bytes_to_32(twenty_bytes: bytes):
         return bytes(12) + twenty_bytes
@@ -184,7 +293,7 @@ def int_to_32_big_endian_bytes(i: int):
 
     eip712_domain_struct_hash = keccak(
         _Constants.eip712_domain_struct_header
-        + pad_20_bytes_to_32(to_bytes(hexstr=order["exchangeAddress"]))
+        + pad_20_bytes_to_32(to_bytes(hexstr=exchange_address))
     )
 
     eip712_order_struct_hash = keccak(
@@ -199,8 +308,8 @@ def int_to_32_big_endian_bytes(i: int):
         + int_to_32_big_endian_bytes(int(order["takerFee"]))
         + int_to_32_big_endian_bytes(int(order["expirationTimeSeconds"]))
         + int_to_32_big_endian_bytes(int(order["salt"]))
-        + keccak(to_bytes(hexstr=order["makerAssetData"]))
-        + keccak(to_bytes(hexstr=order["takerAssetData"]))
+        + keccak(to_bytes(hexstr=order["makerAssetData"].hex()))
+        + keccak(to_bytes(hexstr=order["takerAssetData"].hex()))
     )
 
     return keccak(
diff --git a/python-packages/order_utils/test/test_generate_order_hash_hex.py b/python-packages/order_utils/test/test_generate_order_hash_hex.py
index 6869a40ed3..38b503289b 100644
--- a/python-packages/order_utils/test/test_generate_order_hash_hex.py
+++ b/python-packages/order_utils/test/test_generate_order_hash_hex.py
@@ -8,5 +8,7 @@ def test_get_order_hash_hex__empty_order():
     expected_hash_hex = (
         "faa49b35faeb9197e9c3ba7a52075e6dad19739549f153b77dfcf59408a4b422"
     )
-    actual_hash_hex = generate_order_hash_hex(make_empty_order())
+    actual_hash_hex = generate_order_hash_hex(
+        make_empty_order(), "0x0000000000000000000000000000000000000000"
+    )
     assert actual_hash_hex == expected_hash_hex
diff --git a/python-packages/order_utils/test/test_json_schemas.py b/python-packages/order_utils/test/test_json_schemas.py
index 51cecbd4f5..8178169f64 100644
--- a/python-packages/order_utils/test/test_json_schemas.py
+++ b/python-packages/order_utils/test/test_json_schemas.py
@@ -1,7 +1,7 @@
 """Tests of zero_ex.json_schemas"""
 
 
-from zero_ex.order_utils import make_empty_order
+from zero_ex.order_utils import make_empty_order, order_to_jsdict
 from zero_ex.json_schemas import _LOCAL_RESOLVER, assert_valid
 
 
@@ -15,9 +15,9 @@ def test_assert_valid_caches_resources():
     """
     _LOCAL_RESOLVER._remote_cache.cache_clear()  # pylint: disable=W0212
 
-    assert_valid(make_empty_order(), "/orderSchema")
+    assert_valid(order_to_jsdict(make_empty_order()), "/orderSchema")
     cache_info = (
         _LOCAL_RESOLVER._remote_cache.cache_info()  # pylint: disable=W0212
     )
     assert cache_info.currsize == 4
-    assert cache_info.hits == 10
+    assert cache_info.hits > 0

From f1224b7344a73500525472c783c9ca9425d47cf3 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Wed, 2 Jan 2019 15:06:13 -0500
Subject: [PATCH 02/17] Fixes for json_schemas

Has-types indicator file was not being included in package.

Schemas were not being properly gathered into package installation.
---
 python-packages/order_utils/setup.py          | 11 +++-
 .../src/zero_ex/json_schemas/py.typed         |  0
 .../src/zero_ex/json_schemas/schemas          |  1 -
 .../json_schemas/schemas/address_schema.json  |  5 ++
 .../asset_pairs_request_opts_schema.json      |  8 +++
 .../schemas/block_param_schema.json           | 11 ++++
 .../schemas/block_range_schema.json           |  8 +++
 .../schemas/call_data_schema.json             | 27 ++++++++++
 .../ec_signature_parameter_schema.json        |  5 ++
 .../schemas/ec_signature_schema.json          | 14 +++++
 .../schemas/eip712_typed_data_schema.json     | 28 ++++++++++
 .../json_schemas/schemas/hex_schema.json      |  5 ++
 .../schemas/index_filter_values_schema.json   |  7 +++
 .../json_schemas/schemas/js_number.json       |  5 ++
 .../json_schemas/schemas/number_schema.json   |  5 ++
 .../schemas/order_cancel_schema.json          | 12 +++++
 .../schemas/order_config_request_schema.json  | 24 +++++++++
 .../order_fill_or_kill_requests_schema.json   | 12 +++++
 .../schemas/order_fill_requests_schema.json   | 12 +++++
 .../schemas/order_hash_schema.json            |  5 ++
 .../json_schemas/schemas/order_schema.json    | 34 ++++++++++++
 ...der_watcher_web_socket_request_schema.json | 52 +++++++++++++++++++
 ...atcher_web_socket_utf8_message_schema.json | 10 ++++
 .../schemas/orderbook_request_schema.json     |  9 ++++
 .../schemas/orders_request_opts_schema.json   | 19 +++++++
 .../json_schemas/schemas/orders_schema.json   |  5 ++
 .../schemas/paged_request_opts_schema.json    |  8 +++
 .../schemas/paginated_collection_schema.json  | 10 ++++
 ..._api_asset_data_pairs_response_schema.json | 13 +++++
 .../relayer_api_asset_data_pairs_schema.json  | 12 +++++
 ...ayer_api_asset_data_trade_info_schema.json | 11 ++++
 .../relayer_api_error_response_schema.json    | 21 ++++++++
 ...er_api_fee_recipients_response_schema.json | 16 ++++++
 ...layer_api_order_config_payload_schema.json | 24 +++++++++
 ...ayer_api_order_config_response_schema.json | 11 ++++
 .../schemas/relayer_api_order_schema.json     |  9 ++++
 ...relayer_api_orderbook_response_schema.json |  9 ++++
 ...ders_channel_subscribe_payload_schema.json | 14 +++++
 ...r_api_orders_channel_subscribe_schema.json | 11 ++++
 ...orders_channel_update_response_schema.json | 11 ++++
 .../relayer_api_orders_response_schema.json   | 13 +++++
 .../schemas/relayer_api_orders_schema.json    |  5 ++
 .../schemas/request_opts_schema.json          |  7 +++
 .../schemas/signed_order_schema.json          | 12 +++++
 .../schemas/signed_orders_schema.json         |  5 ++
 .../json_schemas/schemas/token_schema.json    | 11 ++++
 .../json_schemas/schemas/tx_data_schema.json  | 26 ++++++++++
 .../schemas/whole_number_schema.json          | 12 +++++
 .../schemas/zero_ex_transaction_schema.json   | 10 ++++
 49 files changed, 613 insertions(+), 2 deletions(-)
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/py.typed
 delete mode 120000 python-packages/order_utils/src/zero_ex/json_schemas/schemas
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
 create mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json

diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py
index 125de5ff7d..61405caa28 100755
--- a/python-packages/order_utils/setup.py
+++ b/python-packages/order_utils/setup.py
@@ -42,6 +42,15 @@ def run(self):
             "mypy src test setup.py".split(),
             # security issue checker:
             "bandit -r src ./setup.py".split(),
+            # ensure json schemas don't differ from the authoritative copies:
+            # this is a hack.  ideally we would symlink to the authoritative
+            # copies, but a problem with setuptools is preventing it from
+            # following symlinks when gathering package_data.  see
+            # https://github.com/pypa/setuptools/issues/415.
+            (
+                "diff src/zero_ex/json_schemas/schemas"
+                + " ../../packages/json-schemas/schemas"
+            ).split(),
             # general linter:
             "pylint src test setup.py".split(),
             # pylint takes relatively long to run, so it runs last, to enable
@@ -198,7 +207,7 @@ def run(self):
     package_data={
         "zero_ex.order_utils": ["py.typed"],
         "zero_ex.contract_artifacts": ["artifacts/*"],
-        "zero_ex.json_schemas": ["schemas/*"],
+        "zero_ex.json_schemas": ["py.typed", "schemas/*"],
     },
     package_dir={"": "src"},
     license="Apache 2.0",
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/py.typed b/python-packages/order_utils/src/zero_ex/json_schemas/py.typed
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas b/python-packages/order_utils/src/zero_ex/json_schemas/schemas
deleted file mode 120000
index b8257372c3..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../packages/json-schemas/schemas/
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
new file mode 100644
index 0000000000..0dc02d3313
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/addressSchema",
+    "type": "string",
+    "pattern": "^0x[0-9a-f]{40}$"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
new file mode 100644
index 0000000000..174a8fdc32
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
@@ -0,0 +1,8 @@
+{
+    "id": "/AssetPairsRequestOpts",
+    "type": "object",
+    "properties": {
+        "assetDataA": { "$ref": "/hexSchema" },
+        "assetDataB": { "$ref": "/hexSchema" }
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
new file mode 100644
index 0000000000..ed4dd1e875
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/blockParamSchema",
+    "oneOf": [
+        {
+            "type": "number"
+        },
+        {
+            "enum": ["latest", "earliest", "pending"]
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
new file mode 100644
index 0000000000..b142946490
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
@@ -0,0 +1,8 @@
+{
+    "id": "/blockRangeSchema",
+    "properties": {
+        "fromBlock": { "$ref": "/blockParamSchema" },
+        "toBlock": { "$ref": "/blockParamSchema" }
+    },
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
new file mode 100644
index 0000000000..c5972e8c18
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
@@ -0,0 +1,27 @@
+{
+    "id": "/callDataSchema",
+    "properties": {
+        "from": { "$ref": "/addressSchema" },
+        "to": { "$ref": "/addressSchema" },
+        "value": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "gas": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "gasPrice": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "data": {
+            "type": "string",
+            "pattern": "^0x[0-9a-f]*$"
+        },
+        "nonce": {
+            "type": "number",
+            "minimum": 0
+        }
+    },
+    "required": [],
+    "type": "object",
+    "additionalProperties": false
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
new file mode 100644
index 0000000000..0c08ec2403
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/ecSignatureParameterSchema",
+    "type": "string",
+    "pattern": "^0[xX][0-9A-Fa-f]{64}$"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
new file mode 100644
index 0000000000..bc79ca5e96
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
@@ -0,0 +1,14 @@
+{
+    "id": "/ECSignature",
+    "properties": {
+        "v": {
+            "type": "number",
+            "minimum": 27,
+            "maximum": 28
+        },
+        "r": { "$ref": "/ecSignatureParameterSchema" },
+        "s": { "$ref": "/ecSignatureParameterSchema" }
+    },
+    "required": ["v", "r", "s"],
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
new file mode 100644
index 0000000000..8efd6de448
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
@@ -0,0 +1,28 @@
+{
+    "id": "/eip712TypedDataSchema",
+    "type": "object",
+    "properties": {
+        "types": {
+            "type": "object",
+            "properties": {
+                "EIP712Domain": { "type": "array" }
+            },
+            "additionalProperties": {
+                "type": "array",
+                "items": {
+                    "type": "object",
+                    "properties": {
+                        "name": { "type": "string" },
+                        "type": { "type": "string" }
+                    },
+                    "required": ["name", "type"]
+                }
+            },
+            "required": ["EIP712Domain"]
+        },
+        "primaryType": { "type": "string" },
+        "domain": { "type": "object" },
+        "message": { "type": "object" }
+    },
+    "required": ["types", "primaryType", "domain", "message"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
new file mode 100644
index 0000000000..f37815d5bd
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/hexSchema",
+    "type": "string",
+    "pattern": "^0x(([0-9a-f][0-9a-f])+)?$"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
new file mode 100644
index 0000000000..bec00d79e8
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
@@ -0,0 +1,7 @@
+{
+    "id": "/indexFilterValuesSchema",
+    "additionalProperties": {
+        "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/addressSchema" }, { "$ref": "/orderHashSchema" }]
+    },
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
new file mode 100644
index 0000000000..6a72d92c07
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
@@ -0,0 +1,5 @@
+{
+    "id": "/jsNumber",
+    "type": "number",
+    "minimum": 0
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
new file mode 100644
index 0000000000..a48f3e8cff
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/numberSchema",
+    "type": "string",
+    "pattern": "^\\d+(\\.\\d+)?$"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
new file mode 100644
index 0000000000..8d0999941a
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/orderCancellationRequestsSchema",
+    "type": "array",
+    "items": {
+        "properties": {
+            "order": { "$ref": "/orderSchema" },
+            "takerTokenCancelAmount": { "$ref": "/wholeNumberSchema" }
+        },
+        "required": ["order", "takerTokenCancelAmount"],
+        "type": "object"
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
new file mode 100644
index 0000000000..ca9b2e30ee
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
@@ -0,0 +1,24 @@
+{
+    "id": "/OrderConfigRequest",
+    "type": "object",
+    "properties": {
+        "makerAddress": { "$ref": "/addressSchema" },
+        "takerAddress": { "$ref": "/addressSchema" },
+        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "makerAssetData": { "$ref": "/hexSchema" },
+        "takerAssetData": { "$ref": "/hexSchema" },
+        "exchangeAddress": { "$ref": "/addressSchema" },
+        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
+    },
+    "required": [
+        "makerAddress",
+        "takerAddress",
+        "makerAssetAmount",
+        "takerAssetAmount",
+        "makerAssetData",
+        "takerAssetData",
+        "exchangeAddress",
+        "expirationTimeSeconds"
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
new file mode 100644
index 0000000000..73bbf20bb1
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/orderFillOrKillRequestsSchema",
+    "type": "array",
+    "items": {
+        "properties": {
+            "signedOrder": { "$ref": "/signedOrderSchema" },
+            "fillTakerAmount": { "$ref": "/wholeNumberSchema" }
+        },
+        "required": ["signedOrder", "fillTakerAmount"],
+        "type": "object"
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
new file mode 100644
index 0000000000..d06fb19a29
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/orderFillRequestsSchema",
+    "type": "array",
+    "items": {
+        "properties": {
+            "signedOrder": { "$ref": "/signedOrderSchema" },
+            "takerTokenFillAmount": { "$ref": "/wholeNumberSchema" }
+        },
+        "required": ["signedOrder", "takerTokenFillAmount"],
+        "type": "object"
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
new file mode 100644
index 0000000000..4a770579fc
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/orderHashSchema",
+    "type": "string",
+    "pattern": "^0x[0-9a-fA-F]{64}$"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
new file mode 100644
index 0000000000..c70b9e2ddf
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
@@ -0,0 +1,34 @@
+{
+    "id": "/orderSchema",
+    "properties": {
+        "makerAddress": { "$ref": "/addressSchema" },
+        "takerAddress": { "$ref": "/addressSchema" },
+        "makerFee": { "$ref": "/wholeNumberSchema" },
+        "takerFee": { "$ref": "/wholeNumberSchema" },
+        "senderAddress": { "$ref": "/addressSchema" },
+        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "makerAssetData": { "$ref": "/hexSchema" },
+        "takerAssetData": { "$ref": "/hexSchema" },
+        "salt": { "$ref": "/wholeNumberSchema" },
+        "exchangeAddress": { "$ref": "/addressSchema" },
+        "feeRecipientAddress": { "$ref": "/addressSchema" },
+        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
+    },
+    "required": [
+        "makerAddress",
+        "takerAddress",
+        "makerFee",
+        "takerFee",
+        "senderAddress",
+        "makerAssetAmount",
+        "takerAssetAmount",
+        "makerAssetData",
+        "takerAssetData",
+        "salt",
+        "exchangeAddress",
+        "feeRecipientAddress",
+        "expirationTimeSeconds"
+    ],
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
new file mode 100644
index 0000000000..b0c419f94f
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
@@ -0,0 +1,52 @@
+{
+    "id": "/orderWatcherWebSocketRequestSchema",
+    "type": "object",
+    "definitions": {
+        "signedOrderParam": {
+            "type": "object",
+            "properties": {
+                "signedOrder": { "$ref": "/signedOrderSchema" }
+            },
+            "required": ["signedOrder"]
+        },
+        "orderHashParam": {
+            "type": "object",
+            "properties": {
+                "orderHash": { "$ref": "/hexSchema" }
+            },
+            "required": ["orderHash"]
+        }
+    },
+    "oneOf": [
+        {
+            "type": "object",
+            "properties": {
+                "id": { "type": "number" },
+                "jsonrpc": { "type": "string" },
+                "method": { "enum": ["ADD_ORDER"] },
+                "params": { "$ref": "#/definitions/signedOrderParam" }
+            },
+            "required": ["id", "jsonrpc", "method", "params"]
+        },
+        {
+            "type": "object",
+            "properties": {
+                "id": { "type": "number" },
+                "jsonrpc": { "type": "string" },
+                "method": { "enum": ["REMOVE_ORDER"] },
+                "params": { "$ref": "#/definitions/orderHashParam" }
+            },
+            "required": ["id", "jsonrpc", "method", "params"]
+        },
+        {
+            "type": "object",
+            "properties": {
+                "id": { "type": "number" },
+                "jsonrpc": { "type": "string" },
+                "method": { "enum": ["GET_STATS"] },
+                "params": {}
+            },
+            "required": ["id", "jsonrpc", "method"]
+        }
+    ] 
+}
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
new file mode 100644
index 0000000000..154d6d754d
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
@@ -0,0 +1,10 @@
+{
+    "id": "/orderWatcherWebSocketUtf8MessageSchema",
+    "properties": {
+        "utf8Data": { "type": "string" }
+    },
+    "required": [
+        "utf8Data"
+    ],
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
new file mode 100644
index 0000000000..27848bdcb1
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
@@ -0,0 +1,9 @@
+{
+    "id": "/OrderBookRequest",
+    "type": "object",
+    "properties": {
+        "baseAssetData": { "$ref": "/hexSchema" },
+        "quoteAssetData": { "$ref": "/hexSchema" }
+    },
+    "required": ["baseAssetData", "quoteAssetData"]
+}
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
new file mode 100644
index 0000000000..10da510607
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
@@ -0,0 +1,19 @@
+{
+    "id": "/OrdersRequestOpts",
+    "type": "object",
+    "properties": {
+        "makerAssetProxyId": { "$ref": "/hexSchema" },
+        "takerAssetProxyId": { "$ref": "/hexSchema" },
+        "makerAssetAddress": { "$ref": "/addressSchema" },
+        "takerAssetAddress": { "$ref": "/addressSchema" },
+        "exchangeAddress": { "$ref": "/addressSchema" },
+        "senderAddress": { "$ref": "/addressSchema" },
+        "makerAssetData": { "$ref": "/hexSchema" },
+        "takerAssetData": { "$ref": "/hexSchema" },
+        "traderAssetData": { "$ref": "/hexSchema" },
+        "makerAddress": { "$ref": "/addressSchema" },
+        "takerAddress": { "$ref": "/addressSchema" },
+        "traderAddress": { "$ref": "/addressSchema" },
+        "feeRecipientAddress": { "$ref": "/addressSchema" }
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
new file mode 100644
index 0000000000..1e1c6a8751
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/ordersSchema",
+    "type": "array",
+    "items": { "$ref": "/orderSchema" }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
new file mode 100644
index 0000000000..7cfc73947b
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
@@ -0,0 +1,8 @@
+{
+    "id": "/PagedRequestOpts",
+    "type": "object",
+    "properties": {
+        "page": { "type": "number" },
+        "perPage": { "type": "number" }
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
new file mode 100644
index 0000000000..9dcedf5b47
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
@@ -0,0 +1,10 @@
+{
+    "id": "/paginatedCollectionSchema",
+    "type": "object",
+    "properties": {
+        "total": { "type": "number" },
+        "perPage": { "type": "number" },
+        "page": { "type": "number" }
+    },
+    "required": ["total", "perPage", "page"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
new file mode 100644
index 0000000000..d1150d3dbc
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
@@ -0,0 +1,13 @@
+{
+    "id": "/relayerApiAssetDataPairsResponseSchema",
+    "type": "object",
+    "allOf": [
+        { "$ref": "/paginatedCollectionSchema" },
+        {
+            "properties": {
+                "records": { "$ref": "/relayerApiAssetDataPairsSchema" }
+            },
+            "required": ["records"]
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
new file mode 100644
index 0000000000..62d4745b8c
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/relayerApiAssetDataPairsSchema",
+    "type": "array",
+    "items": {
+        "properties": {
+            "assetDataA": { "$ref": "/relayerApiAssetDataTradeInfoSchema" },
+            "assetDataB": { "$ref": "/relayerApiAssetDataTradeInfoSchema" }
+        },
+        "required": ["assetDataA", "assetDataB"],
+        "type": "object"
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
new file mode 100644
index 0000000000..e0f274c5d8
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/relayerApiAssetDataTradeInfoSchema",
+    "type": "object",
+    "properties": {
+        "assetData": { "$ref": "/hexSchema" },
+        "minAmount": { "$ref": "/wholeNumberSchema" },
+        "maxAmount": { "$ref": "/wholeNumberSchema" },
+        "precision": { "type": "number" }
+    },
+    "required": ["assetData"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
new file mode 100644
index 0000000000..be4659b0bd
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
@@ -0,0 +1,21 @@
+{
+    "id": "/relayerApiErrorResponseSchema",
+    "type": "object",
+    "properties": {
+        "code": { "type": "integer", "minimum": 100, "maximum": 103 },
+        "reason": { "type": "string" },
+        "validationErrors": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "field": { "type": "string" },
+                    "code": { "type": "integer", "minimum": 1000, "maximum": 1006 },
+                    "reason": { "type": "string" }
+                },
+                "required": ["field", "code", "reason"]
+            }
+        }
+    },
+    "required": ["code", "reason"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
new file mode 100644
index 0000000000..c73506dbb1
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
@@ -0,0 +1,16 @@
+{
+    "id": "/relayerApiFeeRecipientsResponseSchema",
+    "type": "object",
+    "allOf": [
+        { "$ref": "/paginatedCollectionSchema" },
+        {
+            "properties": {
+                "records": {
+                    "type": "array",
+                    "items": { "$ref": "/addressSchema" }
+                }
+            },
+            "required": ["records"]
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
new file mode 100644
index 0000000000..f4583fc625
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
@@ -0,0 +1,24 @@
+{
+    "id": "/relayerApiOrderConfigPayloadSchema",
+    "type": "object",
+    "properties": {
+        "makerAddress": { "$ref": "/addressSchema" },
+        "takerAddress": { "$ref": "/addressSchema" },
+        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
+        "makerAssetData": { "$ref": "/hexSchema" },
+        "takerAssetData": { "$ref": "/hexSchema" },
+        "exchangeAddress": { "$ref": "/addressSchema" },
+        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
+    },
+    "required": [
+        "makerAddress",
+        "takerAddress",
+        "makerAssetAmount",
+        "takerAssetAmount",
+        "makerAssetData",
+        "takerAssetData",
+        "exchangeAddress",
+        "expirationTimeSeconds"
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
new file mode 100644
index 0000000000..8193861e12
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/relayerApiOrderConfigResponseSchema",
+    "type": "object",
+    "properties": {
+        "makerFee": { "$ref": "/wholeNumberSchema" },
+        "takerFee": { "$ref": "/wholeNumberSchema" },
+        "feeRecipientAddress": { "$ref": "/addressSchema" },
+        "senderAddress": { "$ref": "/addressSchema" }
+    },
+    "required": ["makerFee", "takerFee", "feeRecipientAddress", "senderAddress"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
new file mode 100644
index 0000000000..e0f6539b9f
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
@@ -0,0 +1,9 @@
+{
+    "id": "/relayerApiOrderSchema",
+    "type": "object",
+    "properties": {
+        "order": { "$ref": "/orderSchema" },
+        "metaData": { "type": "object" }
+    },
+    "required": ["order", "metaData"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
new file mode 100644
index 0000000000..b44f2a7408
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
@@ -0,0 +1,9 @@
+{
+    "id": "/relayerApiOrderbookResponseSchema",
+    "type": "object",
+    "properties": {
+        "bids": { "$ref": "/relayerApiOrdersResponseSchema" },
+        "asks": { "$ref": "/relayerApiOrdersResponseSchema" }
+    },
+    "required": ["bids", "asks"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
new file mode 100644
index 0000000000..274ef1625a
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
@@ -0,0 +1,14 @@
+{
+    "id": "/relayerApiOrdersChannelSubscribePayloadSchema",
+    "type": "object",
+    "properties": {
+        "makerAssetProxyId": { "$ref": "/hexSchema" },
+        "takerAssetProxyId": { "$ref": "/hexSchema" },
+        "networkId": { "type": "number" },
+        "makerAssetAddress": { "$ref": "/addressSchema" },
+        "takerAssetAddress": { "$ref": "/addressSchema" },
+        "makerAssetData": { "$ref": "/hexSchema" },
+        "takerAssetData": { "$ref": "/hexSchema" },
+        "traderAssetData": { "$ref": "/hexSchema" }
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
new file mode 100644
index 0000000000..29561d09fc
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/relayerApiOrdersChannelSubscribeSchema",
+    "type": "object",
+    "properties": {
+        "type": { "enum": ["subscribe"] },
+        "channel": { "enum": ["orders"] },
+        "requestId": { "type": "string" },
+        "payload": { "$ref": "/relayerApiOrdersChannelSubscribePayloadSchema" }
+    },
+    "required": ["type", "channel", "requestId"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
new file mode 100644
index 0000000000..239e7c5861
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/relayerApiOrdersChannelUpdateSchema",
+    "type": "object",
+    "properties": {
+        "type": { "enum": ["update"] },
+        "channel": { "enum": ["orders"] },
+        "requestId": { "type": "string" },
+        "payload": { "$ref": "/relayerApiOrdersSchema" }
+    },
+    "required": ["type", "channel", "requestId"]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
new file mode 100644
index 0000000000..a5023a3fc1
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
@@ -0,0 +1,13 @@
+{
+    "id": "/relayerApiOrdersResponseSchema",
+    "type": "object",
+    "allOf": [
+        { "$ref": "/paginatedCollectionSchema" },
+        {
+            "properties": {
+                "records": { "$ref": "/relayerApiOrdersSchema" }
+            },
+            "required": ["records"]
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
new file mode 100644
index 0000000000..84e75cd045
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/relayerApiOrdersSchema",
+    "type": "array",
+    "items": { "$ref": "/relayerApiOrderSchema" }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
new file mode 100644
index 0000000000..b50547d180
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
@@ -0,0 +1,7 @@
+{
+    "id": "/RequestOpts",
+    "type": "object",
+    "properties": {
+        "networkId": { "type": "number" }
+    }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
new file mode 100644
index 0000000000..137ae4a249
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/signedOrderSchema",
+    "allOf": [
+        { "$ref": "/orderSchema" },
+        {
+            "properties": {
+                "signature": { "$ref": "/hexSchema" }
+            },
+            "required": ["signature"]
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
new file mode 100644
index 0000000000..e7c3a0b6c9
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
@@ -0,0 +1,5 @@
+{
+    "id": "/signedOrdersSchema",
+    "type": "array",
+    "items": { "$ref": "/signedOrderSchema" }
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
new file mode 100644
index 0000000000..31e41c4b87
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
@@ -0,0 +1,11 @@
+{
+    "id": "/tokenSchema",
+    "properties": {
+        "name": { "type": "string" },
+        "symbol": { "type": "string" },
+        "decimals": { "type": "number" },
+        "address": { "$ref": "/addressSchema" }
+    },
+    "required": ["name", "symbol", "decimals", "address"],
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
new file mode 100644
index 0000000000..4643521ce4
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
@@ -0,0 +1,26 @@
+{
+    "id": "/txDataSchema",
+    "properties": {
+        "from": { "$ref": "/addressSchema" },
+        "to": { "$ref": "/addressSchema" },
+        "value": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "gas": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "gasPrice": {
+            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
+        },
+        "data": {
+            "type": "string",
+            "pattern": "^0x[0-9a-f]*$"
+        },
+        "nonce": {
+            "type": "number",
+            "minimum": 0
+        }
+    },
+    "required": ["from"],
+    "type": "object"
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
new file mode 100644
index 0000000000..aa469954ca
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
@@ -0,0 +1,12 @@
+{
+    "id": "/wholeNumberSchema",
+    "anyOf": [
+        {
+            "type": "string",
+            "pattern": "^\\d+$"
+        },
+        {
+            "type": "integer"
+        }
+    ]
+}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json
new file mode 100644
index 0000000000..0c714f14d9
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json
@@ -0,0 +1,10 @@
+{
+    "id": "/zeroExTransactionSchema",
+    "properties": {
+        "data": { "$ref": "/hexSchema" },
+        "signerAddress": { "$ref": "/addressSchema" },
+        "salt": { "$ref": "/wholeNumberSchema" }
+    },
+    "required": ["data", "salt", "signerAddress"],
+    "type": "object"
+}

From 4676af65369f048a363ed54032c3ca8803560eb5 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Wed, 19 Dec 2018 18:09:08 -0500
Subject: [PATCH 03/17] Add test/demo of Exchange.getOrderInfo()

---
 .circleci/config.yml                          |  20 +++
 python-packages/contract_demo/.discharge.json |  13 ++
 python-packages/contract_demo/README.md       |  39 +++++
 python-packages/contract_demo/setup.py        | 144 ++++++++++++++++++
 .../contract_demo/stubs/__init__.pyi          |   0
 .../contract_demo/stubs/command/__init__.pyi  |   0
 .../contract_demo/stubs/command/clean.pyi     |   7 +
 .../stubs/distutils/__init__.pyi              |   0
 .../stubs/distutils/command/__init__.pyi      |   0
 .../stubs/distutils/command/clean.pyi         |   7 +
 .../stubs/eth_utils/__init__.pyi              |   4 +
 .../contract_demo/stubs/pytest/__init__.pyi   |   0
 .../stubs/setuptools/__init__.pyi             |   8 +
 .../stubs/setuptools/command/__init__.pyi     |   0
 .../stubs/setuptools/command/test.pyi         |   3 +
 .../contract_demo/stubs/web3/__init__.pyi     |   2 +
 .../stubs/web3/utils/__init__.pyi             |   0
 .../stubs/web3/utils/datatypes.pyi            |   3 +
 .../contract_demo/test/__init__.py            |   1 +
 python-packages/contract_demo/test/conf.py    |  54 +++++++
 .../contract_demo/test/doc_static/.gitkeep    |   0
 python-packages/contract_demo/test/index.rst  |  18 +++
 .../contract_demo/test/test_exchange.py       |  62 ++++++++
 .../src/zero_ex/order_utils/__init__.py       |  10 +-
 24 files changed, 394 insertions(+), 1 deletion(-)
 create mode 100644 python-packages/contract_demo/.discharge.json
 create mode 100644 python-packages/contract_demo/README.md
 create mode 100755 python-packages/contract_demo/setup.py
 create mode 100644 python-packages/contract_demo/stubs/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/command/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/command/clean.pyi
 create mode 100644 python-packages/contract_demo/stubs/distutils/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/distutils/command/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/distutils/command/clean.pyi
 create mode 100644 python-packages/contract_demo/stubs/eth_utils/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/pytest/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/setuptools/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/setuptools/command/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/setuptools/command/test.pyi
 create mode 100644 python-packages/contract_demo/stubs/web3/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/web3/utils/__init__.pyi
 create mode 100644 python-packages/contract_demo/stubs/web3/utils/datatypes.pyi
 create mode 100644 python-packages/contract_demo/test/__init__.py
 create mode 100644 python-packages/contract_demo/test/conf.py
 create mode 100644 python-packages/contract_demo/test/doc_static/.gitkeep
 create mode 100644 python-packages/contract_demo/test/index.rst
 create mode 100644 python-packages/contract_demo/test/test_exchange.py

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 68d8041a2d..0d3176a2f7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -219,6 +219,10 @@ jobs:
                       - '.mypy_cache'
                       - '.pytest_cache'
                       - '.tox'
+            - run:
+                  command: |
+                      cd python-packages/contract_demo
+                      coverage run setup.py test
             - run:
                   command: |
                       cd python-packages/order_utils
@@ -227,6 +231,10 @@ jobs:
                   command: |
                       cd python-packages/sra_client
                       coverage run setup.py test
+            - save_cache:
+                  key: coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
+                  paths:
+                      - ~/repo/python-packages/contract_demo/.coverage
             - save_cache:
                   key: coverage-python-order-utils-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
@@ -273,6 +281,11 @@ jobs:
             - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7/site-packages
             - restore_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
+            - run:
+                  command: |
+                      cd python-packages/contract_demo
+                      python -m ensurepip
+                      python -m pip install .[dev]
             - run:
                   command: |
                       cd python-packages/order_utils
@@ -283,6 +296,10 @@ jobs:
                   paths:
                       - '/usr/local/bin'
                       - '/usr/local/lib/python3.7/site-packages'
+            - run:
+                  command: |
+                      cd python-packages/contract_demo
+                      python setup.py lint
             - run:
                   command: |
                       cd python-packages/order_utils
@@ -355,6 +372,9 @@ jobs:
             - restore_cache:
                   keys:
                       - coverage-contracts-{{ .Environment.CIRCLE_SHA1 }}
+            - restore_cache:
+                  keys:
+                      - coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
             - restore_cache:
                   keys:
                       - coverage-python-order-utils-{{ .Environment.CIRCLE_SHA1 }}
diff --git a/python-packages/contract_demo/.discharge.json b/python-packages/contract_demo/.discharge.json
new file mode 100644
index 0000000000..9d811ae3e6
--- /dev/null
+++ b/python-packages/contract_demo/.discharge.json
@@ -0,0 +1,13 @@
+{
+    "domain": "0x-contract-demo-py",
+    "build_command": "python setup.py build_sphinx",
+    "upload_directory": "build/docs/html",
+    "index_key": "index.html",
+    "error_key": "index.html",
+    "trailing_slashes": true,
+    "cache": 3600,
+    "aws_profile": "default",
+    "aws_region": "us-east-1",
+    "cdn": false,
+    "dns_configured": true
+}
diff --git a/python-packages/contract_demo/README.md b/python-packages/contract_demo/README.md
new file mode 100644
index 0000000000..3a0f964e30
--- /dev/null
+++ b/python-packages/contract_demo/README.md
@@ -0,0 +1,39 @@
+## 0x-contract-demo
+
+A demonstration of calling 0x smart contracts from Python.
+
+Read the [documentation](http://0x-contract-demo-py.s3-website-us-east-1.amazonaws.com/)
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Code and Dependencies
+
+Ensure that you have installed Python >=3.6 and Docker. Then:
+
+```bash
+pip install -e .[dev]
+```
+
+### Test
+
+Tests depend on a running ganache instance with the 0x contracts deployed in it. For convenience, a docker container is provided that has ganache-cli and a snapshot containing the necessary contracts. A shortcut is provided to run that docker container: `./setup.py ganache`. With that running, the tests can be run with `./setup.py test`.
+
+### Clean
+
+`./setup.py clean --all`
+
+### Lint
+
+`./setup.py lint`
+
+### Build Documentation
+
+`./setup.py build_sphinx`
+
+### More
+
+See `./setup.py --help-commands` for more info.
diff --git a/python-packages/contract_demo/setup.py b/python-packages/contract_demo/setup.py
new file mode 100755
index 0000000000..e04b5ab72d
--- /dev/null
+++ b/python-packages/contract_demo/setup.py
@@ -0,0 +1,144 @@
+#!/usr/bin/env python
+
+"""setuptools module for 0x-contract-demo package."""
+
+import distutils.command.build_py
+from distutils.command.clean import clean
+import subprocess  # nosec
+from shutil import rmtree
+from os import environ, path
+from sys import argv
+
+from setuptools import setup
+from setuptools.command.test import test as TestCommand
+
+
+class TestCommandExtension(TestCommand):
+    """Run pytest tests."""
+
+    def run_tests(self):
+        """Invoke pytest."""
+        import pytest
+
+        exit(pytest.main())
+
+
+class LintCommand(distutils.command.build_py.build_py):
+    """Custom setuptools command class for running linters."""
+
+    description = "Run linters"
+
+    def run(self):
+        """Run linter shell commands."""
+        lint_commands = [
+            # formatter:
+            "black --line-length 79 --check --diff test setup.py".split(),
+            # style guide checker (formerly pep8):
+            "pycodestyle test setup.py".split(),
+            # docstring style checker:
+            "pydocstyle test setup.py".split(),
+            # static type checker:
+            "mypy test setup.py".split(),
+            # security issue checker:
+            "bandit -r ./setup.py".split(),
+            # general linter:
+            "pylint test setup.py".split(),
+            # pylint takes relatively long to run, so it runs last, to enable
+            # fast failures.
+        ]
+
+        # tell mypy where to find interface stubs for 3rd party libs
+        environ["MYPYPATH"] = path.join(
+            path.dirname(path.realpath(argv[0])), "stubs"
+        )
+
+        for lint_command in lint_commands:
+            print(
+                "Running lint command `", " ".join(lint_command).strip(), "`"
+            )
+            subprocess.check_call(lint_command)  # nosec
+
+
+class CleanCommandExtension(clean):
+    """Custom command to do custom cleanup."""
+
+    def run(self):
+        """Run the regular clean, followed by our custom commands."""
+        super().run()
+        rmtree(".mypy_cache", ignore_errors=True)
+        rmtree(".tox", ignore_errors=True)
+        rmtree(".pytest_cache", ignore_errors=True)
+
+
+class GanacheCommand(distutils.command.build_py.build_py):
+    """Custom command to publish to pypi.org."""
+
+    description = "Run ganache daemon to support tests."
+
+    def run(self):
+        """Run ganache."""
+        cmd_line = "docker run -d -p 8545:8545 0xorg/ganache-cli:2.2.2".split()
+        subprocess.call(cmd_line)  # nosec
+
+
+class PublishDocsCommand(distutils.command.build_py.build_py):
+    """Custom command to publish docs to S3."""
+
+    description = (
+        "Publish docs to "
+        + "http://0x-contract-addresses-py.s3-website-us-east-1.amazonaws.com/"
+    )
+
+    def run(self):
+        """Run npm package `discharge` to build & upload docs."""
+        subprocess.check_call("discharge deploy".split())  # nosec
+
+
+setup(
+    name="0x-contract-demo",
+    version="1.0.0",
+    description="Demonstration of calling 0x contracts",
+    url=(
+        "https://github.com/0xProject/0x-monorepo/tree/development"
+        + "/python-packages/contract_demo"
+    ),
+    author="F. Eugene Aumson",
+    author_email="feuGeneA@users.noreply.github.com",
+    cmdclass={
+        "clean": CleanCommandExtension,
+        "lint": LintCommand,
+        "test": TestCommandExtension,
+        "ganache": GanacheCommand,
+        "publish_docs": PublishDocsCommand,
+    },
+    install_requires=[
+        "0x-order-utils",
+        "0x-web3",  # TEMPORARY! pending resolution of our web3.py PR#1147
+        "mypy_extensions",
+    ],
+    extras_require={
+        "dev": [
+            "bandit",
+            "black",
+            "coverage",
+            "coveralls",
+            "mypy",
+            "mypy_extensions",
+            "pycodestyle",
+            "pydocstyle",
+            "pylint",
+            "pytest",
+            "sphinx",
+            "tox",
+        ]
+    },
+    python_requires=">=3.6, <4",
+    license="Apache 2.0",
+    zip_safe=False,  # required per mypy
+    command_options={
+        "build_sphinx": {
+            "source_dir": ("setup.py", "test"),
+            "build_dir": ("setup.py", "build/docs"),
+        }
+    },
+)
diff --git a/python-packages/contract_demo/stubs/__init__.pyi b/python-packages/contract_demo/stubs/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/command/__init__.pyi b/python-packages/contract_demo/stubs/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/command/clean.pyi b/python-packages/contract_demo/stubs/command/clean.pyi
new file mode 100644
index 0000000000..46a42ddb13
--- /dev/null
+++ b/python-packages/contract_demo/stubs/command/clean.pyi
@@ -0,0 +1,7 @@
+from distutils.core import Command
+
+class clean(Command):
+    def initialize_options(self: clean) -> None: ...
+    def finalize_options(self: clean) -> None: ...
+    def run(self: clean) -> None: ...
+    ...
diff --git a/python-packages/contract_demo/stubs/distutils/__init__.pyi b/python-packages/contract_demo/stubs/distutils/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/distutils/command/__init__.pyi b/python-packages/contract_demo/stubs/distutils/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/distutils/command/clean.pyi b/python-packages/contract_demo/stubs/distutils/command/clean.pyi
new file mode 100644
index 0000000000..46a42ddb13
--- /dev/null
+++ b/python-packages/contract_demo/stubs/distutils/command/clean.pyi
@@ -0,0 +1,7 @@
+from distutils.core import Command
+
+class clean(Command):
+    def initialize_options(self: clean) -> None: ...
+    def finalize_options(self: clean) -> None: ...
+    def run(self: clean) -> None: ...
+    ...
diff --git a/python-packages/contract_demo/stubs/eth_utils/__init__.pyi b/python-packages/contract_demo/stubs/eth_utils/__init__.pyi
new file mode 100644
index 0000000000..4a83338cad
--- /dev/null
+++ b/python-packages/contract_demo/stubs/eth_utils/__init__.pyi
@@ -0,0 +1,4 @@
+from typing import Union
+
+def to_checksum_address(value: Union[str, bytes]) -> str:
+    ...
diff --git a/python-packages/contract_demo/stubs/pytest/__init__.pyi b/python-packages/contract_demo/stubs/pytest/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/setuptools/__init__.pyi b/python-packages/contract_demo/stubs/setuptools/__init__.pyi
new file mode 100644
index 0000000000..8ea8d32b7e
--- /dev/null
+++ b/python-packages/contract_demo/stubs/setuptools/__init__.pyi
@@ -0,0 +1,8 @@
+from distutils.dist import Distribution
+from typing import Any, List
+
+def setup(**attrs: Any) -> Distribution: ...
+
+class Command: ...
+
+def find_packages(where: str) -> List[str]: ...
diff --git a/python-packages/contract_demo/stubs/setuptools/command/__init__.pyi b/python-packages/contract_demo/stubs/setuptools/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/setuptools/command/test.pyi b/python-packages/contract_demo/stubs/setuptools/command/test.pyi
new file mode 100644
index 0000000000..c5ec770ad3
--- /dev/null
+++ b/python-packages/contract_demo/stubs/setuptools/command/test.pyi
@@ -0,0 +1,3 @@
+from setuptools import Command
+
+class test(Command): ...
diff --git a/python-packages/contract_demo/stubs/web3/__init__.pyi b/python-packages/contract_demo/stubs/web3/__init__.pyi
new file mode 100644
index 0000000000..21482d598a
--- /dev/null
+++ b/python-packages/contract_demo/stubs/web3/__init__.pyi
@@ -0,0 +1,2 @@
+class Web3:
+    ...
diff --git a/python-packages/contract_demo/stubs/web3/utils/__init__.pyi b/python-packages/contract_demo/stubs/web3/utils/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/stubs/web3/utils/datatypes.pyi b/python-packages/contract_demo/stubs/web3/utils/datatypes.pyi
new file mode 100644
index 0000000000..70baff3728
--- /dev/null
+++ b/python-packages/contract_demo/stubs/web3/utils/datatypes.pyi
@@ -0,0 +1,3 @@
+class Contract:
+    def call(self): ...
+    ...
diff --git a/python-packages/contract_demo/test/__init__.py b/python-packages/contract_demo/test/__init__.py
new file mode 100644
index 0000000000..600f143bf1
--- /dev/null
+++ b/python-packages/contract_demo/test/__init__.py
@@ -0,0 +1 @@
+"""Demonstrations of calling 0x smart contracts."""
diff --git a/python-packages/contract_demo/test/conf.py b/python-packages/contract_demo/test/conf.py
new file mode 100644
index 0000000000..45ed4b2a53
--- /dev/null
+++ b/python-packages/contract_demo/test/conf.py
@@ -0,0 +1,54 @@
+"""Configuration file for the Sphinx documentation builder."""
+
+# Reference: http://www.sphinx-doc.org/en/master/config
+
+from typing import List
+import pkg_resources
+
+
+# pylint: disable=invalid-name
+# because these variables are not named in upper case, as globals should be.
+
+project = "0x-contract-demo"
+# pylint: disable=redefined-builtin
+copyright = "2018, ZeroEx, Intl."
+author = "F. Eugene Aumson"
+version = pkg_resources.get_distribution("0x-contract-demo").version
+release = ""  # The full version, including alpha/beta/rc tags
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.doctest",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.coverage",
+    "sphinx.ext.viewcode",
+]
+
+templates_path = ["doc_templates"]
+
+source_suffix = ".rst"
+# eg: source_suffix = [".rst", ".md"]
+
+master_doc = "index"  # The master toctree document.
+
+language = None
+
+exclude_patterns: List[str] = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = None
+
+html_theme = "alabaster"
+
+html_static_path = ["doc_static"]
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = "contract_demopydoc"
+
+# -- Extension configuration:
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {"https://docs.python.org/": None}
diff --git a/python-packages/contract_demo/test/doc_static/.gitkeep b/python-packages/contract_demo/test/doc_static/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_demo/test/index.rst b/python-packages/contract_demo/test/index.rst
new file mode 100644
index 0000000000..c546eccfa3
--- /dev/null
+++ b/python-packages/contract_demo/test/index.rst
@@ -0,0 +1,18 @@
+.. source for the sphinx-generated build/docs/web/index.html
+
+Python demo of 0x Smart Contracts
+=================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+.. automodule:: test.test_exchange
+   :members:
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/python-packages/contract_demo/test/test_exchange.py b/python-packages/contract_demo/test/test_exchange.py
new file mode 100644
index 0000000000..0ecd0e3b45
--- /dev/null
+++ b/python-packages/contract_demo/test/test_exchange.py
@@ -0,0 +1,62 @@
+"""Test calling methods on the Exchange contract."""
+
+from eth_utils import to_checksum_address
+from web3 import Web3
+from web3.utils import datatypes
+
+from zero_ex.json_schemas import assert_valid
+from zero_ex.order_utils import (
+    _Constants,
+    Order,
+    OrderInfo,
+    order_to_jsdict,
+    generate_order_hash_hex,
+)
+
+
+def test_get_order_info():
+    """Demonstrate Exchange.getOrderInfo()."""
+    order: Order = {
+        "makerAddress": "0x0000000000000000000000000000000000000000",
+        "takerAddress": "0x0000000000000000000000000000000000000000",
+        "feeRecipientAddress": "0x0000000000000000000000000000000000000000",
+        "senderAddress": "0x0000000000000000000000000000000000000000",
+        "makerAssetAmount": 1000000000000000000,
+        "takerAssetAmount": 1000000000000000000,
+        "makerFee": 0,
+        "takerFee": 0,
+        "expirationTimeSeconds": 12345,
+        "salt": 12345,
+        "makerAssetData": (b"\x00") * 20,
+        "takerAssetData": (b"\x00") * 20,
+    }
+
+    web3_instance = Web3(Web3.HTTPProvider("http://127.0.0.1:8545"))
+
+    # false positive from pylint: disable=no-member
+    network_id = web3_instance.net.version
+    contract_address = _Constants.network_to_exchange_addr[network_id]
+
+    assert_valid(
+        order_to_jsdict(order, exchange_address=contract_address),
+        "/orderSchema",
+    )
+
+    # false positive from pylint: disable=no-member
+    exchange: datatypes.Contract = web3_instance.eth.contract(
+        address=to_checksum_address(contract_address),
+        abi=_Constants.contract_name_to_abi("Exchange"),
+    )
+
+    order_info = OrderInfo(*exchange.call().getOrderInfo(order))
+
+    assert isinstance(order_info.order_status, int)
+    assert order_info.order_status == 4
+
+    assert isinstance(order_info.order_hash, bytes)
+    assert order_info.order_hash.hex() == generate_order_hash_hex(
+        order, exchange_address=_Constants.network_to_exchange_addr["50"]
+    )
+
+    assert isinstance(order_info.order_taker_asset_filled_amount, int)
+    assert order_info.order_taker_asset_filled_amount == 0
diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index b18e5bb0a8..38dd65d3e8 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -13,7 +13,7 @@
 from copy import copy
 from enum import auto, Enum
 import json
-from typing import cast, Dict, Tuple
+from typing import cast, Dict, NamedTuple, Tuple
 from pkg_resources import resource_string
 
 from mypy_extensions import TypedDict
@@ -319,6 +319,14 @@ def int_to_32_big_endian_bytes(i: int):
     ).hex()
 
 
+class OrderInfo(NamedTuple):
+    """A Web3-compatible representation of the Exchange.OrderInfo struct."""
+
+    order_status: str
+    order_hash: bytes
+    order_taker_asset_filled_amount: int
+
+
 def is_valid_signature(
     provider: BaseProvider, data: str, signature: str, signer_address: str
 ) -> Tuple[bool, str]:

From c88723c6bdc19fe0e2ca074e063c19c044129901 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Wed, 2 Jan 2019 16:04:32 -0500
Subject: [PATCH 04/17] web3 bug workaround

---
 python-packages/order_utils/setup.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py
index 61405caa28..1556f5a6df 100755
--- a/python-packages/order_utils/setup.py
+++ b/python-packages/order_utils/setup.py
@@ -182,6 +182,8 @@ def run(self):
     install_requires=[
         "eth-abi",
         "eth_utils",
+        "hypothesis>=3.31.2",  # HACK! this is web3's dependency!
+        # above works around https://github.com/ethereum/web3.py/issues/1179
         "jsonschema",
         "mypy_extensions",
         "web3",

From 2045bb8b167c00f92b46216eca1af29cd89d39ab Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Wed, 2 Jan 2019 16:29:23 -0500
Subject: [PATCH 05/17] Fix problem packaging contract artifacts

---
 python-packages/order_utils/setup.py          |    9 +
 .../src/zero_ex/contract_artifacts/artifacts  |    1 -
 .../artifacts/AssetProxyOwner.json            |  699 ++++++
 .../artifacts/DummyERC20Token.json            |  328 +++
 .../artifacts/DummyERC721Token.json           |  375 ++++
 .../artifacts/ERC20Proxy.json                 |  195 ++
 .../artifacts/ERC20Token.json                 |  189 ++
 .../artifacts/ERC721Proxy.json                |  195 ++
 .../artifacts/ERC721Token.json                |  268 +++
 .../artifacts/Exchange.json                   | 1981 +++++++++++++++++
 .../artifacts/Forwarder.json                  |  447 ++++
 .../artifacts/IValidator.json                 |   41 +
 .../contract_artifacts/artifacts/IWallet.json |   37 +
 .../artifacts/OrderValidator.json             |  572 +++++
 .../contract_artifacts/artifacts/WETH9.json   |  293 +++
 .../artifacts/ZRXToken.json                   |  227 ++
 16 files changed, 5856 insertions(+), 1 deletion(-)
 delete mode 120000 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json
 create mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json

diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py
index 1556f5a6df..5954339a8c 100755
--- a/python-packages/order_utils/setup.py
+++ b/python-packages/order_utils/setup.py
@@ -51,6 +51,15 @@ def run(self):
                 "diff src/zero_ex/json_schemas/schemas"
                 + " ../../packages/json-schemas/schemas"
             ).split(),
+            # ensure contract artifacts match the authoritative copies:
+            # this is a hack.  ideally we would symlink to the authoritative
+            # copies, but a problem with setuptools is preventing it from
+            # following symlinks when gathering package_data.  see
+            # https://github.com/pypa/setuptools/issues/415.
+            (
+                "diff src/zero_ex/contract_artifacts/artifacts"
+                + " ../../packages/contract-artifacts/artifacts"
+            ).split(),
             # general linter:
             "pylint src test setup.py".split(),
             # pylint takes relatively long to run, so it runs last, to enable
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts
deleted file mode 120000
index 82d28ba87c..0000000000
--- a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../packages/contract-artifacts/artifacts
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
new file mode 100644
index 0000000000..e5fad3aefe
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
@@ -0,0 +1,699 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "AssetProxyOwner",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "owners",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "removeOwner",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "revokeConfirmation",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "isOwner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "confirmations",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "executeRemoveAuthorizedAddressAtIndex",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "secondsTimeLocked",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "pending",
+                        "type": "bool"
+                    },
+                    {
+                        "name": "executed",
+                        "type": "bool"
+                    }
+                ],
+                "name": "getTransactionCount",
+                "outputs": [
+                    {
+                        "name": "count",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "assetProxyContract",
+                        "type": "address"
+                    },
+                    {
+                        "name": "isRegistered",
+                        "type": "bool"
+                    }
+                ],
+                "name": "registerAssetProxy",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "addOwner",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "isConfirmed",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_secondsTimeLocked",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "changeTimeLock",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "isAssetProxyRegistered",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "getConfirmationCount",
+                "outputs": [
+                    {
+                        "name": "count",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
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+                "name": "transactions",
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+                        "type": "uint256"
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+            },
+            {
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+                "name": "getOwners",
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+                        "type": "address[]"
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+                "stateMutability": "view",
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+                    {
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+                    },
+                    {
+                        "name": "executed",
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+                "name": "getTransactionIds",
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+                        "type": "uint256[]"
+                    }
+                ],
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+                "stateMutability": "view",
+                "type": "function"
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+                "name": "getConfirmations",
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+                        "type": "address[]"
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+                "name": "transactionCount",
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+                        "type": "uint256"
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+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
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+            {
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+                "inputs": [
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+                "inputs": [
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+                    },
+                    {
+                        "name": "data",
+                        "type": "bytes"
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+                ],
+                "name": "submitTransaction",
+                "outputs": [
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+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
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+                "inputs": [
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+                        "type": "uint256"
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+                ],
+                "name": "confirmationTimes",
+                "outputs": [
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+                        "type": "uint256"
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+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
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+            {
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+                "stateMutability": "view",
+                "type": "function"
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+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
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+            {
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+                        "type": "address"
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+                    {
+                        "name": "newOwner",
+                        "type": "address"
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+                ],
+                "name": "replaceOwner",
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+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
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+                        "type": "uint256"
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+                ],
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+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "inputs": [
+                    {
+                        "name": "_owners",
+                        "type": "address[]"
+                    },
+                    {
+                        "name": "_assetProxyContracts",
+                        "type": "address[]"
+                    },
+                    {
+                        "name": "_required",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "_secondsTimeLocked",
+                        "type": "uint256"
+                    }
+                ],
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+                "stateMutability": "nonpayable",
+                "type": "constructor"
+            },
+            {
+                "payable": true,
+                "stateMutability": "payable",
+                "type": "fallback"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": false,
+                        "name": "assetProxyContract",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "isRegistered",
+                        "type": "bool"
+                    }
+                ],
+                "name": "AssetProxyRegistration",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "confirmationTime",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "ConfirmationTimeSet",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": false,
+                        "name": "secondsTimeLocked",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "TimeLockChange",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
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+                        "name": "sender",
+                        "type": "address"
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+                    {
+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Confirmation",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "sender",
+                        "type": "address"
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+                    {
+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Revocation",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Submission",
+                "type": "event"
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+            {
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+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Execution",
+                "type": "event"
+            },
+            {
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+                "inputs": [
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+                        "indexed": true,
+                        "name": "transactionId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "ExecutionFailure",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "sender",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Deposit",
+                "type": "event"
+            },
+            {
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+                "inputs": [
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+                        "indexed": true,
+                        "name": "owner",
+                        "type": "address"
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+                "type": "event"
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+                        "name": "owner",
+                        "type": "address"
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+                "name": "OwnerRemoval",
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+                        "name": "required",
+                        "type": "uint256"
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+            }
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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
new file mode 100644
index 0000000000..7b8e7c3a8c
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
@@ -0,0 +1,328 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "DummyERC20Token",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "name",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "totalSupply",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "decimals",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "owner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "symbol",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "mint",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transfer",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    }
+                ],
+                "name": "allowance",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_target",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "setBalance",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "newOwner",
+                        "type": "address"
+                    }
+                ],
+                "name": "transferOwnership",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "MAX_MINT_AMOUNT",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "inputs": [
+                    {
+                        "name": "_name",
+                        "type": "string"
+                    },
+                    {
+                        "name": "_symbol",
+                        "type": "string"
+                    },
+                    {
+                        "name": "_decimals",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "_totalSupply",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "constructor"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
new file mode 100644
index 0000000000..7472a5a03a
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
@@ -0,0 +1,375 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "DummyERC721Token",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "name",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "getApproved",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_approved",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "mint",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "safeTransferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "ownerOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "owner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "symbol",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "burn",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_operator",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_approved",
+                        "type": "bool"
+                    }
+                ],
+                "name": "setApprovalForAll",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "_data",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "safeTransferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_operator",
+                        "type": "address"
+                    }
+                ],
+                "name": "isApprovedForAll",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "newOwner",
+                        "type": "address"
+                    }
+                ],
+                "name": "transferOwnership",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "inputs": [
+                    {
+                        "name": "_name",
+                        "type": "string"
+                    },
+                    {
+                        "name": "_symbol",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "constructor"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_approved",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_operator",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_approved",
+                        "type": "bool"
+                    }
+                ],
+                "name": "ApprovalForAll",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
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+                    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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
new file mode 100644
index 0000000000..33af866e70
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
@@ -0,0 +1,195 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "ERC20Proxy",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    }
+                ],
+                "name": "addAuthorizedAddress",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "authorities",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    }
+                ],
+                "name": "removeAuthorizedAddress",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "owner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "name": "index",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "removeAuthorizedAddressAtIndex",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "getProxyId",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bytes4"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "pure",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "authorized",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "getAuthorizedAddresses",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "newOwner",
+                        "type": "address"
+                    }
+                ],
+                "name": "transferOwnership",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "fallback"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "caller",
+                        "type": "address"
+                    }
+                ],
+                "name": "AuthorizedAddressAdded",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "caller",
+                        "type": "address"
+                    }
+                ],
+                "name": "AuthorizedAddressRemoved",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
new file mode 100644
index 0000000000..d89d08a77d
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
@@ -0,0 +1,189 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "ERC20Token",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "totalSupply",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transfer",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    }
+                ],
+                "name": "allowance",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
+                    "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"
+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
new file mode 100644
index 0000000000..db01e40f0f
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
@@ -0,0 +1,195 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "ERC721Proxy",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    }
+                ],
+                "name": "addAuthorizedAddress",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "authorities",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    }
+                ],
+                "name": "removeAuthorizedAddress",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "owner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "name": "index",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "removeAuthorizedAddressAtIndex",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "getProxyId",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bytes4"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "pure",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "authorized",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "getAuthorizedAddresses",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "newOwner",
+                        "type": "address"
+                    }
+                ],
+                "name": "transferOwnership",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "fallback"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "caller",
+                        "type": "address"
+                    }
+                ],
+                "name": "AuthorizedAddressAdded",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "caller",
+                        "type": "address"
+                    }
+                ],
+                "name": "AuthorizedAddressRemoved",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
+                    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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
new file mode 100644
index 0000000000..d189090e83
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
@@ -0,0 +1,268 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "ERC721Token",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "getApproved",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_approved",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "safeTransferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "ownerOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_operator",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_approved",
+                        "type": "bool"
+                    }
+                ],
+                "name": "setApprovalForAll",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "_data",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "safeTransferFrom",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_operator",
+                        "type": "address"
+                    }
+                ],
+                "name": "isApprovedForAll",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_approved",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_operator",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_approved",
+                        "type": "bool"
+                    }
+                ],
+                "name": "ApprovalForAll",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
+                    "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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json
new file mode 100644
index 0000000000..6e586b8994
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json
@@ -0,0 +1,1981 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "Exchange",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "bytes32"
+                    }
+                ],
+                "name": "filled",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAssetFillAmounts",
+                        "type": "uint256[]"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "batchFillOrders",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "bytes32"
+                    }
+                ],
+                "name": "cancelled",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "hash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "name": "signerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "preSign",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "leftOrder",
+                        "type": "tuple"
+                    },
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "rightOrder",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "leftSignature",
+                        "type": "bytes"
+                    },
+                    {
+                        "name": "rightSignature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "matchOrders",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "components": [
+                                    {
+                                        "name": "makerAssetFilledAmount",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "takerAssetFilledAmount",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "makerFeePaid",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "takerFeePaid",
+                                        "type": "uint256"
+                                    }
+                                ],
+                                "name": "left",
+                                "type": "tuple"
+                            },
+                            {
+                                "components": [
+                                    {
+                                        "name": "makerAssetFilledAmount",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "takerAssetFilledAmount",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "makerFeePaid",
+                                        "type": "uint256"
+                                    },
+                                    {
+                                        "name": "takerFeePaid",
+                                        "type": "uint256"
+                                    }
+                                ],
+                                "name": "right",
+                                "type": "tuple"
+                            },
+                            {
+                                "name": "leftMakerAssetSpreadAmount",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "matchedFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "takerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "fillOrderNoThrow",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "fillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "bytes4"
+                    }
+                ],
+                "name": "assetProxies",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    }
+                ],
+                "name": "batchCancelOrders",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAssetFillAmounts",
+                        "type": "uint256[]"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "batchFillOrKillOrders",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "targetOrderEpoch",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "cancelOrdersUpTo",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAssetFillAmounts",
+                        "type": "uint256[]"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "batchFillOrdersNoThrow",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "assetProxyId",
+                        "type": "bytes4"
+                    }
+                ],
+                "name": "getAssetProxy",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "bytes32"
+                    }
+                ],
+                "name": "transactions",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "takerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "fillOrKillOrder",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "fillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "validatorAddress",
+                        "type": "address"
+                    },
+                    {
+                        "name": "approval",
+                        "type": "bool"
+                    }
+                ],
+                "name": "setSignatureValidatorApproval",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    },
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "allowedValidators",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "marketSellOrders",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    }
+                ],
+                "name": "getOrdersInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "orderStatus",
+                                "type": "uint8"
+                            },
+                            {
+                                "name": "orderHash",
+                                "type": "bytes32"
+                            },
+                            {
+                                "name": "orderTakerAssetFilledAmount",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "",
+                        "type": "tuple[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "bytes32"
+                    },
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "preSigned",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "owner",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "hash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "name": "signerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "isValidSignature",
+                "outputs": [
+                    {
+                        "name": "isValid",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "makerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "marketBuyOrdersNoThrow",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "takerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "fillOrder",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "fillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "salt",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "name": "data",
+                        "type": "bytes"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "executeTransaction",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "assetProxy",
+                        "type": "address"
+                    }
+                ],
+                "name": "registerAssetProxy",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    }
+                ],
+                "name": "getOrderInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "orderStatus",
+                                "type": "uint8"
+                            },
+                            {
+                                "name": "orderHash",
+                                "type": "bytes32"
+                            },
+                            {
+                                "name": "orderTakerAssetFilledAmount",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "orderInfo",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    }
+                ],
+                "name": "cancelOrder",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    },
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "orderEpoch",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "ZRX_ASSET_DATA",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bytes"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "marketSellOrdersNoThrow",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "EIP712_DOMAIN_HASH",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bytes32"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "makerAssetFillAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "signatures",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "marketBuyOrders",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetFilledAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFeePaid",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFeePaid",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "totalFillResults",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "currentContextAddress",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "newOwner",
+                        "type": "address"
+                    }
+                ],
+                "name": "transferOwnership",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "VERSION",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "inputs": [
+                    {
+                        "name": "_zrxAssetData",
+                        "type": "bytes"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "constructor"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "signerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "validatorAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "approved",
+                        "type": "bool"
+                    }
+                ],
+                "name": "SignatureValidatorApproval",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "makerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "feeRecipientAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "takerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "senderAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "makerAssetFilledAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "takerAssetFilledAmount",
+                        "type": "uint256"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "makerFeePaid",
+                        "type": "uint256"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "takerFeePaid",
+                        "type": "uint256"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "orderHash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "makerAssetData",
+                        "type": "bytes"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "takerAssetData",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "Fill",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "makerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "feeRecipientAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "senderAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "orderHash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "makerAssetData",
+                        "type": "bytes"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "takerAssetData",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "Cancel",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "makerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "senderAddress",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "orderEpoch",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "CancelUpTo",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
new file mode 100644
index 0000000000..a7bd62f8ec
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
@@ -0,0 +1,447 @@
+{
+	"schemaVersion": "2.0.0",
+	"contractName": "Forwarder",
+	"compilerOutput": {
+		"abi": [
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "orders",
+						"type": "tuple[]"
+					},
+					{
+						"name": "makerAssetFillAmount",
+						"type": "uint256"
+					},
+					{
+						"name": "signatures",
+						"type": "bytes[]"
+					},
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "feeOrders",
+						"type": "tuple[]"
+					},
+					{
+						"name": "feeSignatures",
+						"type": "bytes[]"
+					},
+					{
+						"name": "feePercentage",
+						"type": "uint256"
+					},
+					{
+						"name": "feeRecipient",
+						"type": "address"
+					}
+				],
+				"name": "marketBuyOrdersWithEth",
+				"outputs": [
+					{
+						"components": [
+							{
+								"name": "makerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFeePaid",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFeePaid",
+								"type": "uint256"
+							}
+						],
+						"name": "orderFillResults",
+						"type": "tuple"
+					},
+					{
+						"components": [
+							{
+								"name": "makerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFeePaid",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFeePaid",
+								"type": "uint256"
+							}
+						],
+						"name": "feeOrderFillResults",
+						"type": "tuple"
+					}
+				],
+				"payable": true,
+				"stateMutability": "payable",
+				"type": "function"
+			},
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"name": "assetData",
+						"type": "bytes"
+					},
+					{
+						"name": "amount",
+						"type": "uint256"
+					}
+				],
+				"name": "withdrawAsset",
+				"outputs": [],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "function"
+			},
+			{
+				"constant": true,
+				"inputs": [],
+				"name": "owner",
+				"outputs": [
+					{
+						"name": "",
+						"type": "address"
+					}
+				],
+				"payable": false,
+				"stateMutability": "view",
+				"type": "function"
+			},
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "orders",
+						"type": "tuple[]"
+					},
+					{
+						"name": "signatures",
+						"type": "bytes[]"
+					},
+					{
+						"components": [
+							{
+								"name": "makerAddress",
+								"type": "address"
+							},
+							{
+								"name": "takerAddress",
+								"type": "address"
+							},
+							{
+								"name": "feeRecipientAddress",
+								"type": "address"
+							},
+							{
+								"name": "senderAddress",
+								"type": "address"
+							},
+							{
+								"name": "makerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFee",
+								"type": "uint256"
+							},
+							{
+								"name": "expirationTimeSeconds",
+								"type": "uint256"
+							},
+							{
+								"name": "salt",
+								"type": "uint256"
+							},
+							{
+								"name": "makerAssetData",
+								"type": "bytes"
+							},
+							{
+								"name": "takerAssetData",
+								"type": "bytes"
+							}
+						],
+						"name": "feeOrders",
+						"type": "tuple[]"
+					},
+					{
+						"name": "feeSignatures",
+						"type": "bytes[]"
+					},
+					{
+						"name": "feePercentage",
+						"type": "uint256"
+					},
+					{
+						"name": "feeRecipient",
+						"type": "address"
+					}
+				],
+				"name": "marketSellOrdersWithEth",
+				"outputs": [
+					{
+						"components": [
+							{
+								"name": "makerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFeePaid",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFeePaid",
+								"type": "uint256"
+							}
+						],
+						"name": "orderFillResults",
+						"type": "tuple"
+					},
+					{
+						"components": [
+							{
+								"name": "makerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "takerAssetFilledAmount",
+								"type": "uint256"
+							},
+							{
+								"name": "makerFeePaid",
+								"type": "uint256"
+							},
+							{
+								"name": "takerFeePaid",
+								"type": "uint256"
+							}
+						],
+						"name": "feeOrderFillResults",
+						"type": "tuple"
+					}
+				],
+				"payable": true,
+				"stateMutability": "payable",
+				"type": "function"
+			},
+			{
+				"constant": false,
+				"inputs": [
+					{
+						"name": "newOwner",
+						"type": "address"
+					}
+				],
+				"name": "transferOwnership",
+				"outputs": [],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "function"
+			},
+			{
+				"inputs": [
+					{
+						"name": "_exchange",
+						"type": "address"
+					},
+					{
+						"name": "_zrxAssetData",
+						"type": "bytes"
+					},
+					{
+						"name": "_wethAssetData",
+						"type": "bytes"
+					}
+				],
+				"payable": false,
+				"stateMutability": "nonpayable",
+				"type": "constructor"
+			},
+			{
+				"payable": true,
+				"stateMutability": "payable",
+				"type": "fallback"
+			}
+		],
+		"evm": {
+			"bytecode": {
+				"linkReferences": {},
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+            }
+        }
+    },
+	"networks": {}
+}
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json
new file mode 100644
index 0000000000..8ca99f261a
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json
@@ -0,0 +1,41 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "IValidator",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "hash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "name": "signerAddress",
+                        "type": "address"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "isValidSignature",
+                "outputs": [
+                    {
+                        "name": "isValid",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "object": "0x"
+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json
new file mode 100644
index 0000000000..2a8f975cc1
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json
@@ -0,0 +1,37 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "IWallet",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "hash",
+                        "type": "bytes32"
+                    },
+                    {
+                        "name": "signature",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "isValidSignature",
+                "outputs": [
+                    {
+                        "name": "isValid",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "object": "0x"
+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
new file mode 100644
index 0000000000..90a92e7cb8
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
@@ -0,0 +1,572 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "OrderValidator",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "takerAddress",
+                        "type": "address"
+                    }
+                ],
+                "name": "getOrderAndTraderInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "orderStatus",
+                                "type": "uint8"
+                            },
+                            {
+                                "name": "orderHash",
+                                "type": "bytes32"
+                            },
+                            {
+                                "name": "orderTakerAssetFilledAmount",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "orderInfo",
+                        "type": "tuple"
+                    },
+                    {
+                        "components": [
+                            {
+                                "name": "makerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxAllowance",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "traderInfo",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "name": "assetData",
+                        "type": "bytes"
+                    }
+                ],
+                "name": "getBalanceAndAllowance",
+                "outputs": [
+                    {
+                        "name": "balance",
+                        "type": "uint256"
+                    },
+                    {
+                        "name": "allowance",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAddresses",
+                        "type": "address[]"
+                    }
+                ],
+                "name": "getOrdersAndTradersInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "orderStatus",
+                                "type": "uint8"
+                            },
+                            {
+                                "name": "orderHash",
+                                "type": "bytes32"
+                            },
+                            {
+                                "name": "orderTakerAssetFilledAmount",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "ordersInfo",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "components": [
+                            {
+                                "name": "makerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxAllowance",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "tradersInfo",
+                        "type": "tuple[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "orders",
+                        "type": "tuple[]"
+                    },
+                    {
+                        "name": "takerAddresses",
+                        "type": "address[]"
+                    }
+                ],
+                "name": "getTradersInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxAllowance",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "",
+                        "type": "tuple[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "token",
+                        "type": "address"
+                    },
+                    {
+                        "name": "tokenId",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "getERC721TokenOwner",
+                "outputs": [
+                    {
+                        "name": "owner",
+                        "type": "address"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "target",
+                        "type": "address"
+                    },
+                    {
+                        "name": "assetData",
+                        "type": "bytes[]"
+                    }
+                ],
+                "name": "getBalancesAndAllowances",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256[]"
+                    },
+                    {
+                        "name": "",
+                        "type": "uint256[]"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "takerAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "feeRecipientAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "senderAddress",
+                                "type": "address"
+                            },
+                            {
+                                "name": "makerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAssetAmount",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerFee",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "expirationTimeSeconds",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "salt",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAssetData",
+                                "type": "bytes"
+                            },
+                            {
+                                "name": "takerAssetData",
+                                "type": "bytes"
+                            }
+                        ],
+                        "name": "order",
+                        "type": "tuple"
+                    },
+                    {
+                        "name": "takerAddress",
+                        "type": "address"
+                    }
+                ],
+                "name": "getTraderInfo",
+                "outputs": [
+                    {
+                        "components": [
+                            {
+                                "name": "makerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "makerZrxAllowance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxBalance",
+                                "type": "uint256"
+                            },
+                            {
+                                "name": "takerZrxAllowance",
+                                "type": "uint256"
+                            }
+                        ],
+                        "name": "traderInfo",
+                        "type": "tuple"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "inputs": [
+                    {
+                        "name": "_exchange",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_zrxAssetData",
+                        "type": "bytes"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "constructor"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
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+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json
new file mode 100644
index 0000000000..e6ce25f7d2
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json
@@ -0,0 +1,293 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "WETH9",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "name",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "guy",
+                        "type": "address"
+                    },
+                    {
+                        "name": "wad",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "totalSupply",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "src",
+                        "type": "address"
+                    },
+                    {
+                        "name": "dst",
+                        "type": "address"
+                    },
+                    {
+                        "name": "wad",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "wad",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "withdraw",
+                "outputs": [],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "decimals",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint8"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "symbol",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "dst",
+                        "type": "address"
+                    },
+                    {
+                        "name": "wad",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transfer",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "nonpayable",
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [],
+                "name": "deposit",
+                "outputs": [],
+                "payable": true,
+                "stateMutability": "payable",
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "",
+                        "type": "address"
+                    },
+                    {
+                        "name": "",
+                        "type": "address"
+                    }
+                ],
+                "name": "allowance",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "stateMutability": "view",
+                "type": "function"
+            },
+            {
+                "payable": true,
+                "stateMutability": "payable",
+                "type": "fallback"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Deposit",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Withdrawal",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
+                    "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"
+            }
+        }
+    },
+    "networks": {}
+}
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json
new file mode 100644
index 0000000000..29bb558244
--- /dev/null
+++ b/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json
@@ -0,0 +1,227 @@
+{
+    "schemaVersion": "2.0.0",
+    "contractName": "ZRXToken",
+    "compilerOutput": {
+        "abi": [
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "name",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "approve",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "totalSupply",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transferFrom",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "decimals",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint8"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    }
+                ],
+                "name": "balanceOf",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [],
+                "name": "symbol",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "string"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": false,
+                "inputs": [
+                    {
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "transfer",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "bool"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "constant": true,
+                "inputs": [
+                    {
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "name": "_spender",
+                        "type": "address"
+                    }
+                ],
+                "name": "allowance",
+                "outputs": [
+                    {
+                        "name": "",
+                        "type": "uint256"
+                    }
+                ],
+                "payable": false,
+                "type": "function"
+            },
+            {
+                "inputs": [],
+                "payable": false,
+                "type": "constructor"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_from",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_to",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Transfer",
+                "type": "event"
+            },
+            {
+                "anonymous": false,
+                "inputs": [
+                    {
+                        "indexed": true,
+                        "name": "_owner",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": true,
+                        "name": "_spender",
+                        "type": "address"
+                    },
+                    {
+                        "indexed": false,
+                        "name": "_value",
+                        "type": "uint256"
+                    }
+                ],
+                "name": "Approval",
+                "type": "event"
+            }
+        ],
+        "evm": {
+            "bytecode": {
+                "linkReferences": {},
+                "object":
+                    "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"
+            }
+        }
+    },
+    "networks": {}
+}

From d1a82cd1320f6834b8e36cffaada331658d0d4f7 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 08:07:25 -0500
Subject: [PATCH 06/17] Move contract addresses to their own package

---
 .circleci/config.yml                          |  25 +++
 README.md                                     |   9 +-
 .../contract_addresses/.discharge.json        |  13 ++
 python-packages/contract_addresses/README.md  |  45 +++++
 python-packages/contract_addresses/setup.py   | 179 ++++++++++++++++++
 .../contract_addresses/src/conf.py            |  54 ++++++
 .../src/doc_static/.gitkeep                   |   0
 .../contract_addresses/src/index.rst          |  25 +++
 .../src/zero_ex/__init__.py                   |   2 +
 .../zero_ex/contract_addresses/__init__.py    |  93 +++++++++
 .../src/zero_ex/contract_addresses/py.typed   |   0
 .../stubs/distutils/__init__.pyi              |   0
 .../stubs/distutils/command/__init__.pyi      |   0
 .../stubs/distutils/command/clean.pyi         |   7 +
 .../stubs/setuptools/__init__.pyi             |   8 +
 .../stubs/setuptools/command/__init__.pyi     |   0
 .../stubs/setuptools/command/test.pyi         |   3 +
 python-packages/contract_addresses/tox.ini    |  12 ++
 python-packages/contract_demo/setup.py        |   1 +
 .../contract_demo/test/test_exchange.py       |   9 +-
 python-packages/order_utils/setup.py          |   1 +
 .../src/zero_ex/order_utils/__init__.py       |  13 +-
 22 files changed, 483 insertions(+), 16 deletions(-)
 create mode 100644 python-packages/contract_addresses/.discharge.json
 create mode 100644 python-packages/contract_addresses/README.md
 create mode 100755 python-packages/contract_addresses/setup.py
 create mode 100644 python-packages/contract_addresses/src/conf.py
 create mode 100644 python-packages/contract_addresses/src/doc_static/.gitkeep
 create mode 100644 python-packages/contract_addresses/src/index.rst
 create mode 100644 python-packages/contract_addresses/src/zero_ex/__init__.py
 create mode 100644 python-packages/contract_addresses/src/zero_ex/contract_addresses/__init__.py
 create mode 100644 python-packages/contract_addresses/src/zero_ex/contract_addresses/py.typed
 create mode 100644 python-packages/contract_addresses/stubs/distutils/__init__.pyi
 create mode 100644 python-packages/contract_addresses/stubs/distutils/command/__init__.pyi
 create mode 100644 python-packages/contract_addresses/stubs/distutils/command/clean.pyi
 create mode 100644 python-packages/contract_addresses/stubs/setuptools/__init__.pyi
 create mode 100644 python-packages/contract_addresses/stubs/setuptools/command/__init__.pyi
 create mode 100644 python-packages/contract_addresses/stubs/setuptools/command/test.pyi
 create mode 100644 python-packages/contract_addresses/tox.ini

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0d3176a2f7..7a4c2693d0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -200,6 +200,11 @@ jobs:
             - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7/site-packages
             - restore_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
+            - run:
+                  command: |
+                      cd python-packages/contract_addresses
+                      python -m ensurepip
+                      python -m pip install .
             - run:
                   command: |
                       cd python-packages/order_utils
@@ -219,6 +224,10 @@ jobs:
                       - '.mypy_cache'
                       - '.pytest_cache'
                       - '.tox'
+            - run:
+                  command: |
+                      cd python-packages/contract_addresses
+                      coverage run setup.py test
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -231,6 +240,10 @@ jobs:
                   command: |
                       cd python-packages/sra_client
                       coverage run setup.py test
+            - save_cache:
+                  key: coverage-python-contract-addresses-{{ .Environment.CIRCLE_SHA1 }}
+                  paths:
+                      - ~/repo/python-packages/contract_addresses/.coverage
             - save_cache:
                   key: coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
@@ -281,6 +294,11 @@ jobs:
             - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7/site-packages
             - restore_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
+            - run:
+                  command: |
+                      cd python-packages/contract_addresses
+                      python -m ensurepip
+                      python -m pip install .[dev]
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -296,6 +314,10 @@ jobs:
                   paths:
                       - '/usr/local/bin'
                       - '/usr/local/lib/python3.7/site-packages'
+            - run:
+                  command: |
+                      cd python-packages/contract_addresses
+                      python setup.py lint
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -372,6 +394,9 @@ jobs:
             - restore_cache:
                   keys:
                       - coverage-contracts-{{ .Environment.CIRCLE_SHA1 }}
+            - restore_cache:
+                  keys:
+                      - coverage-python-contract-addresses-{{ .Environment.CIRCLE_SHA1 }}
             - restore_cache:
                   keys:
                       - coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
diff --git a/README.md b/README.md
index fd96c2b86b..078b01ea83 100644
--- a/README.md
+++ b/README.md
@@ -24,10 +24,11 @@ Visit our [developer portal](https://0xproject.com/docs/order-utils) for a compr
 
 ### Python Packages
 
-| Package                                          | Version                                                                                               | Description                                                                                       |
-| ------------------------------------------------ | ----------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
-| [`0x-order-utils`](/python-packages/order_utils) | [![PyPI](https://img.shields.io/pypi/v/0x-order-utils.svg)](https://pypi.org/project/0x-order-utils/) | A set of utilities for generating, parsing, signing and validating 0x orders                      |
-| [`0x-sra-client`](/python-packages/sra_client)   | [![PyPI](https://img.shields.io/pypi/v/0x-sra-client.svg)](https://pypi.org/project/0x-sra-client/)   | A Python client for interacting with servers conforming to the Standard Relayer API specification |
+| Package                                                        | Version                                                                                                             | Description                                                                                       |
+| -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
+| [`0x-contract-addresses`](/python-packages/contract_addresses) | [![PyPI](https://img.shields.io/pypi/v/0x-contract-addresses.svg)](https://pypi.org/project/0x-contract-addresses/) | A tiny utility library for getting known deployed contract addresses for a particular network     |
+| [`0x-order-utils`](/python-packages/order_utils)               | [![PyPI](https://img.shields.io/pypi/v/0x-order-utils.svg)](https://pypi.org/project/0x-order-utils/)               | A set of utilities for generating, parsing, signing and validating 0x orders                      |
+| [`0x-sra-client`](/python-packages/sra_client)                 | [![PyPI](https://img.shields.io/pypi/v/0x-sra-client.svg)](https://pypi.org/project/0x-sra-client/)                 | A Python client for interacting with servers conforming to the Standard Relayer API specification |
 
 ### Typescript/Javascript Packages
 
diff --git a/python-packages/contract_addresses/.discharge.json b/python-packages/contract_addresses/.discharge.json
new file mode 100644
index 0000000000..d6c90a20f0
--- /dev/null
+++ b/python-packages/contract_addresses/.discharge.json
@@ -0,0 +1,13 @@
+{
+    "domain": "0x-contract-addresses-py",
+    "build_command": "python setup.py build_sphinx",
+    "upload_directory": "build/docs/html",
+    "index_key": "index.html",
+    "error_key": "index.html",
+    "trailing_slashes": true,
+    "cache": 3600,
+    "aws_profile": "default",
+    "aws_region": "us-east-1",
+    "cdn": false,
+    "dns_configured": true
+}
diff --git a/python-packages/contract_addresses/README.md b/python-packages/contract_addresses/README.md
new file mode 100644
index 0000000000..e2714afdfd
--- /dev/null
+++ b/python-packages/contract_addresses/README.md
@@ -0,0 +1,45 @@
+## 0x-contract-addresses
+
+Addresses at which the 0x smart contracts have been deployed.
+
+Read the [documentation](http://0x-contract-addresses-py.s3-website-us-east-1.amazonaws.com/)
+
+## Installing
+
+```bash
+pip install 0x-contract-addresses
+```
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Code and Dependencies
+
+Ensure that you have installed Python >=3.6 and Docker. Then:
+
+```bash
+pip install -e .[dev]
+```
+
+### Test
+
+Tests depend on a running ganache instance with the 0x contracts deployed in it. For convenience, a docker container is provided that has ganache-cli and a snapshot containing the necessary contracts. A shortcut is provided to run that docker container: `./setup.py ganache`. With that running, the tests can be run with `./setup.py test`.
+
+### Clean
+
+`./setup.py clean --all`
+
+### Lint
+
+`./setup.py lint`
+
+### Build Documentation
+
+`./setup.py build_sphinx`
+
+### More
+
+See `./setup.py --help-commands` for more info.
diff --git a/python-packages/contract_addresses/setup.py b/python-packages/contract_addresses/setup.py
new file mode 100755
index 0000000000..83aca8172b
--- /dev/null
+++ b/python-packages/contract_addresses/setup.py
@@ -0,0 +1,179 @@
+#!/usr/bin/env python
+
+"""setuptools module for contract_addresses package."""
+
+import subprocess  # nosec
+from shutil import rmtree
+from os import environ, path
+from sys import argv
+
+from distutils.command.clean import clean
+import distutils.command.build_py
+from setuptools import find_packages, setup
+
+
+class LintCommand(distutils.command.build_py.build_py):
+    """Custom setuptools command class for running linters."""
+
+    description = "Run linters"
+
+    def run(self):
+        """Run linter shell commands."""
+        lint_commands = [
+            # formatter:
+            "black --line-length 79 --check --diff src setup.py".split(),
+            # style guide checker (formerly pep8):
+            "pycodestyle --show-source --show-pep8 src setup.py".split(),
+            # docstring style checker:
+            "pydocstyle src setup.py".split(),
+            # static type checker:
+            "mypy src setup.py".split(),
+            # security issue checker:
+            "bandit -r src ./setup.py".split(),
+            # general linter:
+            "pylint src setup.py".split(),
+            # pylint takes relatively long to run, so it runs last, to enable
+            # fast failures.
+        ]
+
+        # tell mypy where to find interface stubs for 3rd party libs
+        environ["MYPYPATH"] = path.join(
+            path.dirname(path.realpath(argv[0])), "stubs"
+        )
+
+        for lint_command in lint_commands:
+            print(
+                "Running lint command `", " ".join(lint_command).strip(), "`"
+            )
+            subprocess.check_call(lint_command)  # nosec
+
+
+class CleanCommandExtension(clean):
+    """Custom command to do custom cleanup."""
+
+    def run(self):
+        """Run the regular clean, followed by our custom commands."""
+        super().run()
+        rmtree("dist", ignore_errors=True)
+        rmtree(".mypy_cache", ignore_errors=True)
+        rmtree(".tox", ignore_errors=True)
+        rmtree(".pytest_cache", ignore_errors=True)
+        rmtree("src/0x_contract_addresses.egg-info", ignore_errors=True)
+
+
+class TestPublishCommand(distutils.command.build_py.build_py):
+    """Custom command to publish to test.pypi.org."""
+
+    description = (
+        "Publish dist/* to test.pypi.org. Run sdist & bdist_wheel first."
+    )
+
+    def run(self):
+        """Run twine to upload to test.pypi.org."""
+        subprocess.check_call(  # nosec
+            (
+                "twine upload --repository-url https://test.pypi.org/legacy/"
+                + " --verbose dist/*"
+            ).split()
+        )
+
+
+class PublishCommand(distutils.command.build_py.build_py):
+    """Custom command to publish to pypi.org."""
+
+    description = "Publish dist/* to pypi.org. Run sdist & bdist_wheel first."
+
+    def run(self):
+        """Run twine to upload to pypi.org."""
+        subprocess.check_call("twine upload dist/*".split())  # nosec
+
+
+class PublishDocsCommand(distutils.command.build_py.build_py):
+    """Custom command to publish docs to S3."""
+
+    description = (
+        "Publish docs to "
+        + "http://0x-contract-addresses-py.s3-website-us-east-1.amazonaws.com/"
+    )
+
+    def run(self):
+        """Run npm package `discharge` to build & upload docs."""
+        subprocess.check_call("discharge deploy".split())  # nosec
+
+
+with open("README.md", "r") as file_handle:
+    README_MD = file_handle.read()
+
+
+setup(
+    name="0x-contract-addresses",
+    version="2.0.0",
+    description="Addresses at which the 0x smart contracts have been deployed",
+    long_description=README_MD,
+    long_description_content_type="text/markdown",
+    url=(
+        "https://github.com/0xproject/0x-monorepo/tree/development"
+        + "/python-packages/contract_addresses"
+    ),
+    author="F. Eugene Aumson",
+    author_email="feuGeneA@users.noreply.github.com",
+    cmdclass={
+        "clean": CleanCommandExtension,
+        "lint": LintCommand,
+        "test_publish": TestPublishCommand,
+        "publish": PublishCommand,
+        "publish_docs": PublishDocsCommand,
+    },
+    install_requires=["mypy_extensions"],
+    extras_require={
+        "dev": [
+            "bandit",
+            "black",
+            "coverage",
+            "coveralls",
+            "mypy",
+            "mypy_extensions",
+            "pycodestyle",
+            "pydocstyle",
+            "pylint",
+            "pytest",
+            "sphinx",
+            "tox",
+            "twine",
+        ]
+    },
+    python_requires=">=3.6, <4",
+    package_data={"zero_ex.contract_addresses": ["py.typed"]},
+    package_dir={"": "src"},
+    license="Apache 2.0",
+    keywords=(
+        "ethereum cryptocurrency 0x decentralized blockchain dex exchange"
+    ),
+    namespace_packages=["zero_ex"],
+    packages=find_packages("src"),
+    classifiers=[
+        "Development Status :: 5 - Production/Stable",
+        "Intended Audience :: Developers",
+        "Intended Audience :: Financial and Insurance Industry",
+        "License :: OSI Approved :: Apache Software License",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Topic :: Internet :: WWW/HTTP",
+        "Topic :: Office/Business :: Financial",
+        "Topic :: Other/Nonlisted Topic",
+        "Topic :: Security :: Cryptography",
+        "Topic :: Software Development :: Libraries",
+        "Topic :: Utilities",
+    ],
+    zip_safe=False,  # required per mypy
+    command_options={
+        "build_sphinx": {
+            "source_dir": ("setup.py", "src"),
+            "build_dir": ("setup.py", "build/docs"),
+        }
+    },
+)
diff --git a/python-packages/contract_addresses/src/conf.py b/python-packages/contract_addresses/src/conf.py
new file mode 100644
index 0000000000..a0f372bc5f
--- /dev/null
+++ b/python-packages/contract_addresses/src/conf.py
@@ -0,0 +1,54 @@
+"""Configuration file for the Sphinx documentation builder."""
+
+# Reference: http://www.sphinx-doc.org/en/master/config
+
+from typing import List
+import pkg_resources
+
+
+# pylint: disable=invalid-name
+# because these variables are not named in upper case, as globals should be.
+
+project = "0x-contract-addresses"
+# pylint: disable=redefined-builtin
+copyright = "2018, ZeroEx, Intl."
+author = "F. Eugene Aumson"
+version = pkg_resources.get_distribution("0x-contract-addresses").version
+release = ""  # The full version, including alpha/beta/rc tags
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.doctest",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.coverage",
+    "sphinx.ext.viewcode",
+]
+
+templates_path = ["doc_templates"]
+
+source_suffix = ".rst"
+# eg: source_suffix = [".rst", ".md"]
+
+master_doc = "index"  # The master toctree document.
+
+language = None
+
+exclude_patterns: List[str] = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = None
+
+html_theme = "alabaster"
+
+html_static_path = ["doc_static"]
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = "contract_addressespydoc"
+
+# -- Extension configuration:
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {"https://docs.python.org/": None}
diff --git a/python-packages/contract_addresses/src/doc_static/.gitkeep b/python-packages/contract_addresses/src/doc_static/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_addresses/src/index.rst b/python-packages/contract_addresses/src/index.rst
new file mode 100644
index 0000000000..7ac329ce2e
--- /dev/null
+++ b/python-packages/contract_addresses/src/index.rst
@@ -0,0 +1,25 @@
+.. source for the sphinx-generated build/docs/web/index.html
+
+Python zero_ex.contract_addresses
+=================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+.. autoclass:: zero_ex.contract_addresses.NetworkId
+
+   See source for enum members.
+
+.. autoclass:: zero_ex.contract_addresses.ContractAddresses
+   :members:
+
+.. autodata:: zero_ex.contract_addresses.NETWORK_TO_ADDRESSES
+   :annotation:
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/python-packages/contract_addresses/src/zero_ex/__init__.py b/python-packages/contract_addresses/src/zero_ex/__init__.py
new file mode 100644
index 0000000000..e90d833db6
--- /dev/null
+++ b/python-packages/contract_addresses/src/zero_ex/__init__.py
@@ -0,0 +1,2 @@
+"""0x Python API."""
+__import__("pkg_resources").declare_namespace(__name__)
diff --git a/python-packages/contract_addresses/src/zero_ex/contract_addresses/__init__.py b/python-packages/contract_addresses/src/zero_ex/contract_addresses/__init__.py
new file mode 100644
index 0000000000..a4bfc3f4cc
--- /dev/null
+++ b/python-packages/contract_addresses/src/zero_ex/contract_addresses/__init__.py
@@ -0,0 +1,93 @@
+"""Addresses at which the 0x smart contracts have been deployed."""
+
+from enum import Enum
+from typing import Dict, NamedTuple
+
+
+class ContractAddresses(NamedTuple):  # noqa
+    """An abstract record listing all the contracts that have addresses."""
+
+    erc20_proxy: str
+    erc721_proxy: str
+    zrx_token: str
+    ether_token: str
+    exchange: str
+    asset_proxy_owner: str
+    forwarder: str
+    order_validator: str
+
+
+class NetworkId(Enum):
+    """Network names correlated to their network identification numbers.
+
+    >>> NetworkId.MAINNET
+    <NetworkId.MAINNET: 1>
+    """
+
+    MAINNET = 1
+    ROPSTEN = 3
+    RINKEBY = 4
+    KOVAN = 42
+    GANACHE = 50
+
+
+NETWORK_TO_ADDRESSES: Dict[NetworkId, ContractAddresses] = {
+    NetworkId.MAINNET: ContractAddresses(
+        erc20_proxy="0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
+        erc721_proxy="0x208e41fb445f1bb1b6780d58356e81405f3e6127",
+        zrx_token="0xe41d2489571d322189246dafa5ebde1f4699f498",
+        ether_token="0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
+        exchange="0x4f833a24e1f95d70f028921e27040ca56e09ab0b",
+        asset_proxy_owner="0x17992e4ffb22730138e4b62aaa6367fa9d3699a6",
+        forwarder="0x5468a1dc173652ee28d249c271fa9933144746b1",
+        order_validator="0x9463e518dea6810309563c81d5266c1b1d149138",
+    ),
+    NetworkId.ROPSTEN: ContractAddresses(
+        erc20_proxy="0xb1408f4c245a23c31b98d2c626777d4c0d766caa",
+        erc721_proxy="0xe654aac058bfbf9f83fcaee7793311dd82f6ddb4",
+        zrx_token="0xff67881f8d12f372d91baae9752eb3631ff0ed00",
+        ether_token="0xc778417e063141139fce010982780140aa0cd5ab",
+        exchange="0x4530c0483a1633c7a1c97d2c53721caff2caaaaf",
+        asset_proxy_owner="0xf5fa5b5fed2727a0e44ac67f6772e97977aa358b",
+        forwarder="0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
+        order_validator="0x90431a90516ab49af23a0530e04e8c7836e7122f",
+    ),
+    NetworkId.RINKEBY: ContractAddresses(
+        exchange="0xbce0b5f6eb618c565c3e5f5cd69652bbc279f44e",
+        erc20_proxy="0x2f5ae4f6106e89b4147651688a92256885c5f410",
+        erc721_proxy="0x7656d773e11ff7383a14dcf09a9c50990481cd10",
+        zrx_token="0x8080c7e4b81ecf23aa6f877cfbfd9b0c228c6ffa",
+        ether_token="0xc778417e063141139fce010982780140aa0cd5ab",
+        asset_proxy_owner="0xe1703da878afcebff5b7624a826902af475b9c03",
+        forwarder="0x2d40589abbdee84961f3a7656b9af7adb0ee5ab4",
+        order_validator="0x0c5173a51e26b29d6126c686756fb9fbef71f762",
+    ),
+    NetworkId.KOVAN: ContractAddresses(
+        erc20_proxy="0xf1ec01d6236d3cd881a0bf0130ea25fe4234003e",
+        erc721_proxy="0x2a9127c745688a165106c11cd4d647d2220af821",
+        zrx_token="0x2002d3812f58e35f0ea1ffbf80a75a38c32175fa",
+        ether_token="0xd0a1e359811322d97991e03f863a0c30c2cf029c",
+        exchange="0x35dd2932454449b14cee11a94d3674a936d5d7b2",
+        asset_proxy_owner="0x2c824d2882baa668e0d5202b1e7f2922278703f8",
+        forwarder="0x17992e4ffb22730138e4b62aaa6367fa9d3699a6",
+        order_validator="0xb389da3d204b412df2f75c6afb3d0a7ce0bc283d",
+    ),
+    NetworkId.GANACHE: ContractAddresses(
+        exchange="0x48bacb9266a570d521063ef5dd96e61686dbe788",
+        erc20_proxy="0x1dc4c1cefef38a777b15aa20260a54e584b16c48",
+        erc721_proxy="0x1d7022f5b17d2f8b695918fb48fa1089c9f85401",
+        zrx_token="0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c",
+        ether_token="0x0b1ba0af832d7c05fd64161e0db78e85978e8082",
+        asset_proxy_owner="0x34d402f14d58e001d8efbe6585051bf9706aa064",
+        forwarder="0xb69e673309512a9d726f87304c6984054f87a93b",
+        order_validator="0xe86bb98fcf9bff3512c74589b78fb168200cc546",
+    ),
+}
+"""A mapping from instances of NetworkId to instances of ContractAddresses.
+
+Addresses under NetworkId.Ganache are from our Ganache snapshot generated from
+migrations.
+
+>>> NETWORK_TO_ADDRESSES[NetworkId.MAINNET].exchange
+0x4f833a24e1f95d70f028921e27040ca56e09ab0b
+"""
diff --git a/python-packages/contract_addresses/src/zero_ex/contract_addresses/py.typed b/python-packages/contract_addresses/src/zero_ex/contract_addresses/py.typed
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_addresses/stubs/distutils/__init__.pyi b/python-packages/contract_addresses/stubs/distutils/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_addresses/stubs/distutils/command/__init__.pyi b/python-packages/contract_addresses/stubs/distutils/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_addresses/stubs/distutils/command/clean.pyi b/python-packages/contract_addresses/stubs/distutils/command/clean.pyi
new file mode 100644
index 0000000000..46a42ddb13
--- /dev/null
+++ b/python-packages/contract_addresses/stubs/distutils/command/clean.pyi
@@ -0,0 +1,7 @@
+from distutils.core import Command
+
+class clean(Command):
+    def initialize_options(self: clean) -> None: ...
+    def finalize_options(self: clean) -> None: ...
+    def run(self: clean) -> None: ...
+    ...
diff --git a/python-packages/contract_addresses/stubs/setuptools/__init__.pyi b/python-packages/contract_addresses/stubs/setuptools/__init__.pyi
new file mode 100644
index 0000000000..8ea8d32b7e
--- /dev/null
+++ b/python-packages/contract_addresses/stubs/setuptools/__init__.pyi
@@ -0,0 +1,8 @@
+from distutils.dist import Distribution
+from typing import Any, List
+
+def setup(**attrs: Any) -> Distribution: ...
+
+class Command: ...
+
+def find_packages(where: str) -> List[str]: ...
diff --git a/python-packages/contract_addresses/stubs/setuptools/command/__init__.pyi b/python-packages/contract_addresses/stubs/setuptools/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_addresses/stubs/setuptools/command/test.pyi b/python-packages/contract_addresses/stubs/setuptools/command/test.pyi
new file mode 100644
index 0000000000..c5ec770ad3
--- /dev/null
+++ b/python-packages/contract_addresses/stubs/setuptools/command/test.pyi
@@ -0,0 +1,3 @@
+from setuptools import Command
+
+class test(Command): ...
diff --git a/python-packages/contract_addresses/tox.ini b/python-packages/contract_addresses/tox.ini
new file mode 100644
index 0000000000..aa1037ed7c
--- /dev/null
+++ b/python-packages/contract_addresses/tox.ini
@@ -0,0 +1,12 @@
+# tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py37
+
+[testenv]
+commands =
+    pip install -e .[dev]
+    python setup.py lint
diff --git a/python-packages/contract_demo/setup.py b/python-packages/contract_demo/setup.py
index e04b5ab72d..fe6d5097e8 100755
--- a/python-packages/contract_demo/setup.py
+++ b/python-packages/contract_demo/setup.py
@@ -112,6 +112,7 @@ def run(self):
         "publish_docs": PublishDocsCommand,
     },
     install_requires=[
+        "0x-contract-addresses",
         "0x-order-utils",
         "0x-web3",  # TEMPORARY! pending resolution of our web3.py PR#1147
         "mypy_extensions",
diff --git a/python-packages/contract_demo/test/test_exchange.py b/python-packages/contract_demo/test/test_exchange.py
index 0ecd0e3b45..c9e9a59f1c 100644
--- a/python-packages/contract_demo/test/test_exchange.py
+++ b/python-packages/contract_demo/test/test_exchange.py
@@ -4,6 +4,7 @@
 from web3 import Web3
 from web3.utils import datatypes
 
+from zero_ex.contract_addresses import NETWORK_TO_ADDRESSES, NetworkId
 from zero_ex.json_schemas import assert_valid
 from zero_ex.order_utils import (
     _Constants,
@@ -34,8 +35,9 @@ def test_get_order_info():
     web3_instance = Web3(Web3.HTTPProvider("http://127.0.0.1:8545"))
 
     # false positive from pylint: disable=no-member
-    network_id = web3_instance.net.version
-    contract_address = _Constants.network_to_exchange_addr[network_id]
+    contract_address = NETWORK_TO_ADDRESSES[
+        NetworkId(int(web3_instance.net.version))
+    ].exchange
 
     assert_valid(
         order_to_jsdict(order, exchange_address=contract_address),
@@ -55,7 +57,8 @@ def test_get_order_info():
 
     assert isinstance(order_info.order_hash, bytes)
     assert order_info.order_hash.hex() == generate_order_hash_hex(
-        order, exchange_address=_Constants.network_to_exchange_addr["50"]
+        order,
+        exchange_address=NETWORK_TO_ADDRESSES[NetworkId.GANACHE].exchange,
     )
 
     assert isinstance(order_info.order_taker_asset_filled_amount, int)
diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py
index 5954339a8c..b070bb6249 100755
--- a/python-packages/order_utils/setup.py
+++ b/python-packages/order_utils/setup.py
@@ -189,6 +189,7 @@ def run(self):
         "ganache": GanacheCommand,
     },
     install_requires=[
+        "0x-contract-addresses",
         "eth-abi",
         "eth_utils",
         "hypothesis>=3.31.2",  # HACK! this is web3's dependency!
diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index 38dd65d3e8..838b390139 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -24,6 +24,7 @@
 from web3.providers.base import BaseProvider
 from web3.utils import datatypes
 
+from zero_ex.contract_addresses import NETWORK_TO_ADDRESSES, NetworkId
 from zero_ex.dev_utils.type_assertions import (
     assert_is_address,
     assert_is_hex_string,
@@ -56,13 +57,6 @@ def contract_name_to_abi(cls, contract_name: str) -> Dict:
             )["compilerOutput"]["abi"]
             return cls._contract_name_to_abi[contract_name]
 
-    network_to_exchange_addr: Dict[str, str] = {
-        "1": "0x4f833a24e1f95d70f028921e27040ca56e09ab0b",
-        "3": "0x4530c0483a1633c7a1c97d2c53721caff2caaaaf",
-        "42": "0x35dd2932454449b14cee11a94d3674a936d5d7b2",
-        "50": "0x48bacb9266a570d521063ef5dd96e61686dbe788",
-    }
-
     null_address = "0x0000000000000000000000000000000000000000"
 
     eip191_header = b"\x19\x01"
@@ -358,8 +352,9 @@ def is_valid_signature(
 
     web3_instance = Web3(provider)
     # false positive from pylint: disable=no-member
-    network_id = web3_instance.net.version
-    contract_address = _Constants.network_to_exchange_addr[network_id]
+    contract_address = NETWORK_TO_ADDRESSES[
+        NetworkId(int(web3_instance.net.version))
+    ].exchange
     # false positive from pylint: disable=no-member
     contract: datatypes.Contract = web3_instance.eth.contract(
         address=to_checksum_address(contract_address),

From 09e760d959a0620a59d1cac82248c60004935d57 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 10:28:15 -0500
Subject: [PATCH 07/17] Move contract artifacts to their own package

---
 .circleci/config.yml                          |  25 +++
 .prettierignore                               |   2 +-
 README.md                                     |   1 +
 python-packages/contract_addresses/setup.py   |   2 +
 .../contract_artifacts/.discharge.json        |  13 ++
 python-packages/contract_artifacts/.pylintrc  |   3 +
 python-packages/contract_artifacts/README.md  |  45 +++++
 python-packages/contract_artifacts/setup.py   | 188 ++++++++++++++++++
 .../contract_artifacts/src/conf.py            |  54 +++++
 .../src/doc_static/.gitkeep                   |   0
 .../contract_artifacts/src/index.rst          |  18 ++
 .../src/zero_ex/__init__.py                   |   2 +
 .../zero_ex/contract_artifacts/__init__.py    |  35 ++++
 .../artifacts/AssetProxyOwner.json            |   0
 .../artifacts/DummyERC20Token.json            |   0
 .../artifacts/DummyERC721Token.json           |   0
 .../artifacts/ERC20Proxy.json                 |   0
 .../artifacts/ERC20Token.json                 |   0
 .../artifacts/ERC721Proxy.json                |   0
 .../artifacts/ERC721Token.json                |   0
 .../artifacts/Exchange.json                   |   0
 .../artifacts/Forwarder.json                  |   0
 .../artifacts/IValidator.json                 |   0
 .../contract_artifacts/artifacts/IWallet.json |   0
 .../artifacts/OrderValidator.json             |   0
 .../contract_artifacts/artifacts/WETH9.json   |   0
 .../artifacts/ZRXToken.json                   |   0
 .../src/zero_ex/contract_artifacts/py.typed   |   0
 .../stubs/distutils/__init__.pyi              |   0
 .../stubs/distutils/command/__init__.pyi      |   0
 .../stubs/distutils/command/clean.pyi         |   7 +
 .../stubs/setuptools/__init__.pyi             |   8 +
 .../stubs/setuptools/command/__init__.pyi     |   0
 .../stubs/setuptools/command/test.pyi         |   3 +
 python-packages/contract_artifacts/tox.ini    |  12 ++
 python-packages/contract_demo/setup.py        |   1 +
 .../contract_demo/test/test_exchange.py       |   4 +-
 python-packages/order_utils/setup.py          |  13 +-
 .../zero_ex/contract_artifacts/__init__.py    |   1 -
 .../src/zero_ex/order_utils/__init__.py       |  24 +--
 .../order_utils/test/test_doctest.py          |  18 --
 41 files changed, 424 insertions(+), 55 deletions(-)
 create mode 100644 python-packages/contract_artifacts/.discharge.json
 create mode 100644 python-packages/contract_artifacts/.pylintrc
 create mode 100644 python-packages/contract_artifacts/README.md
 create mode 100755 python-packages/contract_artifacts/setup.py
 create mode 100644 python-packages/contract_artifacts/src/conf.py
 create mode 100644 python-packages/contract_artifacts/src/doc_static/.gitkeep
 create mode 100644 python-packages/contract_artifacts/src/index.rst
 create mode 100644 python-packages/contract_artifacts/src/zero_ex/__init__.py
 create mode 100644 python-packages/contract_artifacts/src/zero_ex/contract_artifacts/__init__.py
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/Exchange.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/Forwarder.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/IValidator.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/IWallet.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/WETH9.json (100%)
 rename python-packages/{order_utils => contract_artifacts}/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json (100%)
 create mode 100644 python-packages/contract_artifacts/src/zero_ex/contract_artifacts/py.typed
 create mode 100644 python-packages/contract_artifacts/stubs/distutils/__init__.pyi
 create mode 100644 python-packages/contract_artifacts/stubs/distutils/command/__init__.pyi
 create mode 100644 python-packages/contract_artifacts/stubs/distutils/command/clean.pyi
 create mode 100644 python-packages/contract_artifacts/stubs/setuptools/__init__.pyi
 create mode 100644 python-packages/contract_artifacts/stubs/setuptools/command/__init__.pyi
 create mode 100644 python-packages/contract_artifacts/stubs/setuptools/command/test.pyi
 create mode 100644 python-packages/contract_artifacts/tox.ini
 delete mode 100644 python-packages/order_utils/src/zero_ex/contract_artifacts/__init__.py
 delete mode 100644 python-packages/order_utils/test/test_doctest.py

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7a4c2693d0..2763423ba8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -205,6 +205,11 @@ jobs:
                       cd python-packages/contract_addresses
                       python -m ensurepip
                       python -m pip install .
+            - run:
+                  command: |
+                      cd python-packages/contract_artifacts
+                      python -m ensurepip
+                      python -m pip install .
             - run:
                   command: |
                       cd python-packages/order_utils
@@ -228,6 +233,10 @@ jobs:
                   command: |
                       cd python-packages/contract_addresses
                       coverage run setup.py test
+            - run:
+                  command: |
+                      cd python-packages/contract_artifacts
+                      coverage run setup.py test
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -244,6 +253,10 @@ jobs:
                   key: coverage-python-contract-addresses-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
                       - ~/repo/python-packages/contract_addresses/.coverage
+            - save_cache:
+                  key: coverage-python-contract-artifacts-{{ .Environment.CIRCLE_SHA1 }}
+                  paths:
+                      - ~/repo/python-packages/contract_artifacts/.coverage
             - save_cache:
                   key: coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
@@ -299,6 +312,11 @@ jobs:
                       cd python-packages/contract_addresses
                       python -m ensurepip
                       python -m pip install .[dev]
+            - run:
+                  command: |
+                      cd python-packages/contract_artifacts
+                      python -m ensurepip
+                      python -m pip install .[dev]
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -318,6 +336,10 @@ jobs:
                   command: |
                       cd python-packages/contract_addresses
                       python setup.py lint
+            - run:
+                  command: |
+                      cd python-packages/contract_artifacts
+                      python setup.py lint
             - run:
                   command: |
                       cd python-packages/contract_demo
@@ -397,6 +419,9 @@ jobs:
             - restore_cache:
                   keys:
                       - coverage-python-contract-addresses-{{ .Environment.CIRCLE_SHA1 }}
+            - restore_cache:
+                  keys:
+                      - coverage-python-contract-artifacts-{{ .Environment.CIRCLE_SHA1 }}
             - restore_cache:
                   keys:
                       - coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
diff --git a/.prettierignore b/.prettierignore
index 7f8662b0a2..a509c4f882 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -18,7 +18,7 @@ lib
 /contracts/extensions/generated-artifacts
 /packages/abi-gen-wrappers/src/generated-wrappers
 /packages/contract-artifacts/artifacts
-/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts
+/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts
 /packages/json-schemas/schemas
 /python-packages/order_utils/src/zero_ex/json_schemas/schemas
 /packages/metacoin/src/contract_wrappers
diff --git a/README.md b/README.md
index 078b01ea83..5f9526794c 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Visit our [developer portal](https://0xproject.com/docs/order-utils) for a compr
 | Package                                                        | Version                                                                                                             | Description                                                                                       |
 | -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
 | [`0x-contract-addresses`](/python-packages/contract_addresses) | [![PyPI](https://img.shields.io/pypi/v/0x-contract-addresses.svg)](https://pypi.org/project/0x-contract-addresses/) | A tiny utility library for getting known deployed contract addresses for a particular network     |
+| [`0x-contract-artifacts`](/python-packages/contract_artifacts) | [![PyPI](https://img.shields.io/pypi/v/0x-contract-artifacts.svg)](https://pypi.org/project/0x-contract-artifacts/) | 0x smart contract compilation artifacts                                                           |
 | [`0x-order-utils`](/python-packages/order_utils)               | [![PyPI](https://img.shields.io/pypi/v/0x-order-utils.svg)](https://pypi.org/project/0x-order-utils/)               | A set of utilities for generating, parsing, signing and validating 0x orders                      |
 | [`0x-sra-client`](/python-packages/sra_client)                 | [![PyPI](https://img.shields.io/pypi/v/0x-sra-client.svg)](https://pypi.org/project/0x-sra-client/)                 | A Python client for interacting with servers conforming to the Standard Relayer API specification |
 
diff --git a/python-packages/contract_addresses/setup.py b/python-packages/contract_addresses/setup.py
index 83aca8172b..9ddafbeead 100755
--- a/python-packages/contract_addresses/setup.py
+++ b/python-packages/contract_addresses/setup.py
@@ -30,6 +30,8 @@ def run(self):
             "mypy src setup.py".split(),
             # security issue checker:
             "bandit -r src ./setup.py".split(),
+            # run doctests:
+            "pytest --doctest-modules".split(),
             # general linter:
             "pylint src setup.py".split(),
             # pylint takes relatively long to run, so it runs last, to enable
diff --git a/python-packages/contract_artifacts/.discharge.json b/python-packages/contract_artifacts/.discharge.json
new file mode 100644
index 0000000000..d9cb2a37b2
--- /dev/null
+++ b/python-packages/contract_artifacts/.discharge.json
@@ -0,0 +1,13 @@
+{
+    "domain": "0x-contract-artifacts-py",
+    "build_command": "python setup.py build_sphinx",
+    "upload_directory": "build/docs/html",
+    "index_key": "index.html",
+    "error_key": "index.html",
+    "trailing_slashes": true,
+    "cache": 3600,
+    "aws_profile": "default",
+    "aws_region": "us-east-1",
+    "cdn": false,
+    "dns_configured": true
+}
diff --git a/python-packages/contract_artifacts/.pylintrc b/python-packages/contract_artifacts/.pylintrc
new file mode 100644
index 0000000000..937bc6313b
--- /dev/null
+++ b/python-packages/contract_artifacts/.pylintrc
@@ -0,0 +1,3 @@
+[MESSAGES CONTROL]
+disable=C0330,line-too-long,fixme,too-few-public-methods,too-many-ancestors
+# C0330 is "bad hanging indent". we use indents per `black`.
diff --git a/python-packages/contract_artifacts/README.md b/python-packages/contract_artifacts/README.md
new file mode 100644
index 0000000000..e0a34cbca4
--- /dev/null
+++ b/python-packages/contract_artifacts/README.md
@@ -0,0 +1,45 @@
+## 0x-contract-artifacts
+
+0x smart contract compilation artifacts
+
+Read the [documentation](http://0x-contract-artifacts-py.s3-website-us-east-1.amazonaws.com/)
+
+## Installing
+
+```bash
+pip install 0x-contract-artifacts
+```
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Code and Dependencies
+
+Ensure that you have installed Python >=3.6 and Docker. Then:
+
+```bash
+pip install -e .[dev]
+```
+
+### Test
+
+Tests depend on a running ganache instance with the 0x contracts deployed in it. For convenience, a docker container is provided that has ganache-cli and a snapshot containing the necessary contracts. A shortcut is provided to run that docker container: `./setup.py ganache`. With that running, the tests can be run with `./setup.py test`.
+
+### Clean
+
+`./setup.py clean --all`
+
+### Lint
+
+`./setup.py lint`
+
+### Build Documentation
+
+`./setup.py build_sphinx`
+
+### More
+
+See `./setup.py --help-commands` for more info.
diff --git a/python-packages/contract_artifacts/setup.py b/python-packages/contract_artifacts/setup.py
new file mode 100755
index 0000000000..7d738e48f0
--- /dev/null
+++ b/python-packages/contract_artifacts/setup.py
@@ -0,0 +1,188 @@
+#!/usr/bin/env python
+
+"""setuptools module for contract_artifacts package."""
+
+import subprocess  # nosec
+from shutil import rmtree
+from os import environ, path
+from sys import argv
+
+from distutils.command.clean import clean
+import distutils.command.build_py
+from setuptools import find_packages, setup
+
+
+class LintCommand(distutils.command.build_py.build_py):
+    """Custom setuptools command class for running linters."""
+
+    description = "Run linters"
+
+    def run(self):
+        """Run linter shell commands."""
+        lint_commands = [
+            # formatter:
+            "black --line-length 79 --check --diff src setup.py".split(),
+            # style guide checker (formerly pep8):
+            "pycodestyle --show-source --show-pep8 src setup.py".split(),
+            # docstring style checker:
+            "pydocstyle src setup.py".split(),
+            # static type checker:
+            "mypy src setup.py".split(),
+            # security issue checker:
+            "bandit -r src ./setup.py".split(),
+            # ensure contract artifacts match the authoritative copies:
+            # this is a hack.  ideally we would symlink to the authoritative
+            # copies, but a problem with setuptools is preventing it from
+            # following symlinks when gathering package_data.  see
+            # https://github.com/pypa/setuptools/issues/415.
+            (
+                "diff src/zero_ex/contract_artifacts/artifacts"
+                + " ../../packages/contract-artifacts/artifacts"
+            ).split(),
+            # general linter:
+            "pylint src setup.py".split(),
+            # pylint takes relatively long to run, so it runs last, to enable
+            # fast failures.
+        ]
+
+        # tell mypy where to find interface stubs for 3rd party libs
+        environ["MYPYPATH"] = path.join(
+            path.dirname(path.realpath(argv[0])), "stubs"
+        )
+
+        for lint_command in lint_commands:
+            print(
+                "Running lint command `", " ".join(lint_command).strip(), "`"
+            )
+            subprocess.check_call(lint_command)  # nosec
+
+
+class CleanCommandExtension(clean):
+    """Custom command to do custom cleanup."""
+
+    def run(self):
+        """Run the regular clean, followed by our custom commands."""
+        super().run()
+        rmtree("dist", ignore_errors=True)
+        rmtree(".mypy_cache", ignore_errors=True)
+        rmtree(".tox", ignore_errors=True)
+        rmtree(".pytest_cache", ignore_errors=True)
+        rmtree("src/0x_contract_artifacts.egg-info", ignore_errors=True)
+
+
+class TestPublishCommand(distutils.command.build_py.build_py):
+    """Custom command to publish to test.pypi.org."""
+
+    description = (
+        "Publish dist/* to test.pypi.org. Run sdist & bdist_wheel first."
+    )
+
+    def run(self):
+        """Run twine to upload to test.pypi.org."""
+        subprocess.check_call(  # nosec
+            (
+                "twine upload --repository-url https://test.pypi.org/legacy/"
+                + " --verbose dist/*"
+            ).split()
+        )
+
+
+class PublishCommand(distutils.command.build_py.build_py):
+    """Custom command to publish to pypi.org."""
+
+    description = "Publish dist/* to pypi.org. Run sdist & bdist_wheel first."
+
+    def run(self):
+        """Run twine to upload to pypi.org."""
+        subprocess.check_call("twine upload dist/*".split())  # nosec
+
+
+class PublishDocsCommand(distutils.command.build_py.build_py):
+    """Custom command to publish docs to S3."""
+
+    description = (
+        "Publish docs to "
+        + "http://0x-contract-artifacts-py.s3-website-us-east-1.amazonaws.com/"
+    )
+
+    def run(self):
+        """Run npm package `discharge` to build & upload docs."""
+        subprocess.check_call("discharge deploy".split())  # nosec
+
+
+with open("README.md", "r") as file_handle:
+    README_MD = file_handle.read()
+
+
+setup(
+    name="0x-contract-artifacts",
+    version="2.0.0",
+    description="0x smart contract compilation artifacts",
+    long_description=README_MD,
+    long_description_content_type="text/markdown",
+    url=(
+        "https://github.com/0xproject/0x-monorepo/tree/development"
+        + "/python-packages/contract_artifacts"
+    ),
+    author="F. Eugene Aumson",
+    author_email="feuGeneA@users.noreply.github.com",
+    cmdclass={
+        "clean": CleanCommandExtension,
+        "lint": LintCommand,
+        "test_publish": TestPublishCommand,
+        "publish": PublishCommand,
+        "publish_docs": PublishDocsCommand,
+    },
+    install_requires=["mypy_extensions"],
+    extras_require={
+        "dev": [
+            "bandit",
+            "black",
+            "coverage",
+            "coveralls",
+            "mypy",
+            "mypy_extensions",
+            "pycodestyle",
+            "pydocstyle",
+            "pylint",
+            "pytest",
+            "sphinx",
+            "tox",
+            "twine",
+        ]
+    },
+    python_requires=">=3.6, <4",
+    package_data={"zero_ex.contract_artifacts": ["py.typed", "artifacts/*"]},
+    package_dir={"": "src"},
+    license="Apache 2.0",
+    keywords=(
+        "ethereum cryptocurrency 0x decentralized blockchain dex exchange"
+    ),
+    namespace_packages=["zero_ex"],
+    packages=find_packages("src"),
+    classifiers=[
+        "Development Status :: 5 - Production/Stable",
+        "Intended Audience :: Developers",
+        "Intended Audience :: Financial and Insurance Industry",
+        "License :: OSI Approved :: Apache Software License",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Topic :: Internet :: WWW/HTTP",
+        "Topic :: Office/Business :: Financial",
+        "Topic :: Other/Nonlisted Topic",
+        "Topic :: Security :: Cryptography",
+        "Topic :: Software Development :: Libraries",
+        "Topic :: Utilities",
+    ],
+    zip_safe=False,  # required per mypy
+    command_options={
+        "build_sphinx": {
+            "source_dir": ("setup.py", "src"),
+            "build_dir": ("setup.py", "build/docs"),
+        }
+    },
+)
diff --git a/python-packages/contract_artifacts/src/conf.py b/python-packages/contract_artifacts/src/conf.py
new file mode 100644
index 0000000000..2b0a971168
--- /dev/null
+++ b/python-packages/contract_artifacts/src/conf.py
@@ -0,0 +1,54 @@
+"""Configuration file for the Sphinx documentation builder."""
+
+# Reference: http://www.sphinx-doc.org/en/master/config
+
+from typing import List
+import pkg_resources
+
+
+# pylint: disable=invalid-name
+# because these variables are not named in upper case, as globals should be.
+
+project = "0x-contract-artifacts"
+# pylint: disable=redefined-builtin
+copyright = "2018, ZeroEx, Intl."
+author = "F. Eugene Aumson"
+version = pkg_resources.get_distribution("0x-contract-artifacts").version
+release = ""  # The full version, including alpha/beta/rc tags
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.doctest",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.coverage",
+    "sphinx.ext.viewcode",
+]
+
+templates_path = ["doc_templates"]
+
+source_suffix = ".rst"
+# eg: source_suffix = [".rst", ".md"]
+
+master_doc = "index"  # The master toctree document.
+
+language = None
+
+exclude_patterns: List[str] = []
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = None
+
+html_theme = "alabaster"
+
+html_static_path = ["doc_static"]
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = "contract_artifactspydoc"
+
+# -- Extension configuration:
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {"https://docs.python.org/": None}
diff --git a/python-packages/contract_artifacts/src/doc_static/.gitkeep b/python-packages/contract_artifacts/src/doc_static/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_artifacts/src/index.rst b/python-packages/contract_artifacts/src/index.rst
new file mode 100644
index 0000000000..d086ad2880
--- /dev/null
+++ b/python-packages/contract_artifacts/src/index.rst
@@ -0,0 +1,18 @@
+.. source for the sphinx-generated build/docs/web/index.html
+
+Python zero_ex.contract_artifacts
+=================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+.. automodule:: zero_ex.contract_artifacts
+   :members:
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/python-packages/contract_artifacts/src/zero_ex/__init__.py b/python-packages/contract_artifacts/src/zero_ex/__init__.py
new file mode 100644
index 0000000000..e90d833db6
--- /dev/null
+++ b/python-packages/contract_artifacts/src/zero_ex/__init__.py
@@ -0,0 +1,2 @@
+"""0x Python API."""
+__import__("pkg_resources").declare_namespace(__name__)
diff --git a/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/__init__.py b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/__init__.py
new file mode 100644
index 0000000000..18947ee3bc
--- /dev/null
+++ b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/__init__.py
@@ -0,0 +1,35 @@
+"""0x smart contract compilation artifacts."""
+
+import json
+from typing import Dict
+from pkg_resources import resource_string
+
+
+class _ArtifactCache:
+    """A cache to facilitate lazy & singular loading of contract artifacts."""
+
+    _contract_name_to_abi: Dict[str, Dict] = {}  # class data, not instance
+
+    @classmethod
+    def contract_name_to_abi(cls, contract_name: str) -> Dict:
+        """Return the ABI for the given contract name.
+
+        First tries to get data from the class level storage
+        `_contract_name_to_abi`.  If it's not there, loads it from disk, stores
+        it in the class data (for the next caller), and then returns it.
+        """
+        try:
+            return cls._contract_name_to_abi[contract_name]
+        except KeyError:
+            cls._contract_name_to_abi[contract_name] = json.loads(
+                resource_string(
+                    "zero_ex.contract_artifacts",
+                    f"artifacts/{contract_name}.json",
+                )
+            )["compilerOutput"]["abi"]
+            return cls._contract_name_to_abi[contract_name]
+
+
+def abi_by_name(contract_name: str) -> Dict:
+    """Return the ABI for the named contract."""
+    return _ArtifactCache.contract_name_to_abi(contract_name)
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/AssetProxyOwner.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/DummyERC20Token.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/DummyERC721Token.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC20Proxy.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC20Token.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC721Proxy.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ERC721Token.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/Exchange.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Exchange.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/Exchange.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/Forwarder.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/IValidator.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IValidator.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/IValidator.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/IWallet.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/IWallet.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/IWallet.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/OrderValidator.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/WETH9.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/WETH9.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/WETH9.json
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json
similarity index 100%
rename from python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json
rename to python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts/ZRXToken.json
diff --git a/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/py.typed b/python-packages/contract_artifacts/src/zero_ex/contract_artifacts/py.typed
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_artifacts/stubs/distutils/__init__.pyi b/python-packages/contract_artifacts/stubs/distutils/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_artifacts/stubs/distutils/command/__init__.pyi b/python-packages/contract_artifacts/stubs/distutils/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_artifacts/stubs/distutils/command/clean.pyi b/python-packages/contract_artifacts/stubs/distutils/command/clean.pyi
new file mode 100644
index 0000000000..46a42ddb13
--- /dev/null
+++ b/python-packages/contract_artifacts/stubs/distutils/command/clean.pyi
@@ -0,0 +1,7 @@
+from distutils.core import Command
+
+class clean(Command):
+    def initialize_options(self: clean) -> None: ...
+    def finalize_options(self: clean) -> None: ...
+    def run(self: clean) -> None: ...
+    ...
diff --git a/python-packages/contract_artifacts/stubs/setuptools/__init__.pyi b/python-packages/contract_artifacts/stubs/setuptools/__init__.pyi
new file mode 100644
index 0000000000..8ea8d32b7e
--- /dev/null
+++ b/python-packages/contract_artifacts/stubs/setuptools/__init__.pyi
@@ -0,0 +1,8 @@
+from distutils.dist import Distribution
+from typing import Any, List
+
+def setup(**attrs: Any) -> Distribution: ...
+
+class Command: ...
+
+def find_packages(where: str) -> List[str]: ...
diff --git a/python-packages/contract_artifacts/stubs/setuptools/command/__init__.pyi b/python-packages/contract_artifacts/stubs/setuptools/command/__init__.pyi
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/python-packages/contract_artifacts/stubs/setuptools/command/test.pyi b/python-packages/contract_artifacts/stubs/setuptools/command/test.pyi
new file mode 100644
index 0000000000..c5ec770ad3
--- /dev/null
+++ b/python-packages/contract_artifacts/stubs/setuptools/command/test.pyi
@@ -0,0 +1,3 @@
+from setuptools import Command
+
+class test(Command): ...
diff --git a/python-packages/contract_artifacts/tox.ini b/python-packages/contract_artifacts/tox.ini
new file mode 100644
index 0000000000..aa1037ed7c
--- /dev/null
+++ b/python-packages/contract_artifacts/tox.ini
@@ -0,0 +1,12 @@
+# tox (https://tox.readthedocs.io/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py37
+
+[testenv]
+commands =
+    pip install -e .[dev]
+    python setup.py lint
diff --git a/python-packages/contract_demo/setup.py b/python-packages/contract_demo/setup.py
index fe6d5097e8..a7afbd30c8 100755
--- a/python-packages/contract_demo/setup.py
+++ b/python-packages/contract_demo/setup.py
@@ -113,6 +113,7 @@ def run(self):
     },
     install_requires=[
         "0x-contract-addresses",
+        "0x-contract-artifacts",
         "0x-order-utils",
         "0x-web3",  # TEMPORARY! pending resolution of our web3.py PR#1147
         "mypy_extensions",
diff --git a/python-packages/contract_demo/test/test_exchange.py b/python-packages/contract_demo/test/test_exchange.py
index c9e9a59f1c..07492a4030 100644
--- a/python-packages/contract_demo/test/test_exchange.py
+++ b/python-packages/contract_demo/test/test_exchange.py
@@ -5,9 +5,9 @@
 from web3.utils import datatypes
 
 from zero_ex.contract_addresses import NETWORK_TO_ADDRESSES, NetworkId
+import zero_ex.contract_artifacts
 from zero_ex.json_schemas import assert_valid
 from zero_ex.order_utils import (
-    _Constants,
     Order,
     OrderInfo,
     order_to_jsdict,
@@ -47,7 +47,7 @@ def test_get_order_info():
     # false positive from pylint: disable=no-member
     exchange: datatypes.Contract = web3_instance.eth.contract(
         address=to_checksum_address(contract_address),
-        abi=_Constants.contract_name_to_abi("Exchange"),
+        abi=zero_ex.contract_artifacts.abi_by_name("Exchange"),
     )
 
     order_info = OrderInfo(*exchange.call().getOrderInfo(order))
diff --git a/python-packages/order_utils/setup.py b/python-packages/order_utils/setup.py
index b070bb6249..5ee034a466 100755
--- a/python-packages/order_utils/setup.py
+++ b/python-packages/order_utils/setup.py
@@ -21,7 +21,7 @@ def run_tests(self):
         """Invoke pytest."""
         import pytest
 
-        exit(pytest.main())
+        exit(pytest.main(["--doctest-modules"]))
 
 
 class LintCommand(distutils.command.build_py.build_py):
@@ -51,15 +51,6 @@ def run(self):
                 "diff src/zero_ex/json_schemas/schemas"
                 + " ../../packages/json-schemas/schemas"
             ).split(),
-            # ensure contract artifacts match the authoritative copies:
-            # this is a hack.  ideally we would symlink to the authoritative
-            # copies, but a problem with setuptools is preventing it from
-            # following symlinks when gathering package_data.  see
-            # https://github.com/pypa/setuptools/issues/415.
-            (
-                "diff src/zero_ex/contract_artifacts/artifacts"
-                + " ../../packages/contract-artifacts/artifacts"
-            ).split(),
             # general linter:
             "pylint src test setup.py".split(),
             # pylint takes relatively long to run, so it runs last, to enable
@@ -190,6 +181,7 @@ def run(self):
     },
     install_requires=[
         "0x-contract-addresses",
+        "0x-contract-artifacts",
         "eth-abi",
         "eth_utils",
         "hypothesis>=3.31.2",  # HACK! this is web3's dependency!
@@ -218,7 +210,6 @@ def run(self):
     python_requires=">=3.6, <4",
     package_data={
         "zero_ex.order_utils": ["py.typed"],
-        "zero_ex.contract_artifacts": ["artifacts/*"],
         "zero_ex.json_schemas": ["py.typed", "schemas/*"],
     },
     package_dir={"": "src"},
diff --git a/python-packages/order_utils/src/zero_ex/contract_artifacts/__init__.py b/python-packages/order_utils/src/zero_ex/contract_artifacts/__init__.py
deleted file mode 100644
index ed45d2c8eb..0000000000
--- a/python-packages/order_utils/src/zero_ex/contract_artifacts/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-"""Solc-generated artifacts for 0x smart contracts."""
diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index 838b390139..867f59d719 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -25,6 +25,7 @@
 from web3.utils import datatypes
 
 from zero_ex.contract_addresses import NETWORK_TO_ADDRESSES, NetworkId
+import zero_ex.contract_artifacts
 from zero_ex.dev_utils.type_assertions import (
     assert_is_address,
     assert_is_hex_string,
@@ -36,27 +37,6 @@
 class _Constants:
     """Static data used by order utilities."""
 
-    _contract_name_to_abi: Dict[str, Dict] = {}  # class data, not instance
-
-    @classmethod
-    def contract_name_to_abi(cls, contract_name: str) -> Dict:
-        """Return the ABI for the given contract name.
-
-        First tries to get data from the class level storage
-        `_contract_name_to_abi`.  If it's not there, loads it from disk, stores
-        it in the class data (for the next caller), and then returns it.
-        """
-        try:
-            return cls._contract_name_to_abi[contract_name]
-        except KeyError:
-            cls._contract_name_to_abi[contract_name] = json.loads(
-                resource_string(
-                    "zero_ex.contract_artifacts",
-                    f"artifacts/{contract_name}.json",
-                )
-            )["compilerOutput"]["abi"]
-            return cls._contract_name_to_abi[contract_name]
-
     null_address = "0x0000000000000000000000000000000000000000"
 
     eip191_header = b"\x19\x01"
@@ -358,7 +338,7 @@ def is_valid_signature(
     # false positive from pylint: disable=no-member
     contract: datatypes.Contract = web3_instance.eth.contract(
         address=to_checksum_address(contract_address),
-        abi=_Constants.contract_name_to_abi("Exchange"),
+        abi=zero_ex.contract_artifacts.abi_by_name("Exchange"),
     )
     try:
         return (
diff --git a/python-packages/order_utils/test/test_doctest.py b/python-packages/order_utils/test/test_doctest.py
deleted file mode 100644
index 297f75e756..0000000000
--- a/python-packages/order_utils/test/test_doctest.py
+++ /dev/null
@@ -1,18 +0,0 @@
-"""Exercise doctests for all of our modules."""
-
-from doctest import testmod
-import pkgutil
-import importlib
-
-import zero_ex
-
-
-def test_all_doctests():
-    """Gather zero_ex.* modules and doctest them."""
-    for (_, modname, _) in pkgutil.walk_packages(
-        path=zero_ex.__path__, prefix="zero_ex."
-    ):
-        module = importlib.import_module(modname)
-        print(module)
-        (failure_count, _) = testmod(module)
-        assert failure_count == 0

From 680c365fd0ea54eae550a14f3e0ca0c14bc59405 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 11:17:39 -0500
Subject: [PATCH 08/17] Add scripts to install, test & lint all components

---
 .circleci/config.yml                     | 80 +++---------------------
 python-packages/cmd_pkgs_in_dep_order.py | 24 +++++++
 python-packages/install                  | 13 ++++
 python-packages/install_editable         | 13 ++++
 python-packages/lint                     | 13 ++++
 python-packages/sra_client/setup.py      | 10 +++
 python-packages/test                     | 13 ++++
 7 files changed, 93 insertions(+), 73 deletions(-)
 create mode 100755 python-packages/cmd_pkgs_in_dep_order.py
 create mode 100755 python-packages/install
 create mode 100755 python-packages/install_editable
 create mode 100755 python-packages/lint
 create mode 100755 python-packages/test

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2763423ba8..9b203c323c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -202,53 +202,18 @@ jobs:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
             - run:
                   command: |
-                      cd python-packages/contract_addresses
+                      cd python-packages
                       python -m ensurepip
-                      python -m pip install .
-            - run:
-                  command: |
-                      cd python-packages/contract_artifacts
-                      python -m ensurepip
-                      python -m pip install .
-            - run:
-                  command: |
-                      cd python-packages/order_utils
-                      python -m ensurepip
-                      python -m pip install -e .[dev]
-            - run:
-                  command: |
-                      cd python-packages/sra_client
-                      python -m ensurepip
-                      python -m pip install -e .
+                      ./install
             - save_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
                       - '/usr/local/bin'
                       - '/usr/local/lib/python3.7/site-packages'
-                      - '.eggs'
-                      - '.mypy_cache'
-                      - '.pytest_cache'
-                      - '.tox'
-            - run:
-                  command: |
-                      cd python-packages/contract_addresses
-                      coverage run setup.py test
-            - run:
-                  command: |
-                      cd python-packages/contract_artifacts
-                      coverage run setup.py test
-            - run:
-                  command: |
-                      cd python-packages/contract_demo
-                      coverage run setup.py test
-            - run:
-                  command: |
-                      cd python-packages/order_utils
-                      coverage run setup.py test
             - run:
                   command: |
-                      cd python-packages/sra_client
-                      coverage run setup.py test
+                      cd python-packages
+                      ./cmd_pkgs_in_dep_order.py coverage run setup.py test
             - save_cache:
                   key: coverage-python-contract-addresses-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
@@ -309,45 +274,15 @@ jobs:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
             - run:
                   command: |
-                      cd python-packages/contract_addresses
-                      python -m ensurepip
-                      python -m pip install .[dev]
-            - run:
-                  command: |
-                      cd python-packages/contract_artifacts
-                      python -m ensurepip
-                      python -m pip install .[dev]
-            - run:
-                  command: |
-                      cd python-packages/contract_demo
-                      python -m ensurepip
-                      python -m pip install .[dev]
-            - run:
-                  command: |
-                      cd python-packages/order_utils
                       python -m ensurepip
-                      python -m pip install -e .[dev]
+                      cd python-packages
+                      ./install
+                      ./lint
             - save_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
                       - '/usr/local/bin'
                       - '/usr/local/lib/python3.7/site-packages'
-            - run:
-                  command: |
-                      cd python-packages/contract_addresses
-                      python setup.py lint
-            - run:
-                  command: |
-                      cd python-packages/contract_artifacts
-                      python setup.py lint
-            - run:
-                  command: |
-                      cd python-packages/contract_demo
-                      python setup.py lint
-            - run:
-                  command: |
-                      cd python-packages/order_utils
-                      python setup.py lint
     static-tests:
         working_directory: ~/repo
         docker:
@@ -463,6 +398,5 @@ workflows:
                       - test-rest
                       - test-python
             - test-python
-            - static-tests-python
             # skip python tox run for now, as we don't yet have multiple test environments to support.
             #- test-rest-python
diff --git a/python-packages/cmd_pkgs_in_dep_order.py b/python-packages/cmd_pkgs_in_dep_order.py
new file mode 100755
index 0000000000..c5ca097384
--- /dev/null
+++ b/python-packages/cmd_pkgs_in_dep_order.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+"""Run a command in every package, in order of increasing dependency."""
+
+import os
+import subprocess
+import sys
+
+
+PACKAGE_DEPENDENCY_LIST = [
+    # Order matters!  Packages must be handled in dependency order (most
+    # independent first) in order for them to resolve properly.
+    "contract_addresses",
+    "contract_artifacts",
+    "sra_client",
+    "order_utils",
+    "contract_demo"
+]
+
+for package in PACKAGE_DEPENDENCY_LIST:
+    print(f"Running command `{sys.argv[1:]}` in package {package}")
+    os.chdir(package)
+    subprocess.check_call(sys.argv[1:])
+    os.chdir("..")
diff --git a/python-packages/install b/python-packages/install
new file mode 100755
index 0000000000..73d88fec27
--- /dev/null
+++ b/python-packages/install
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+"""Install all packages in non-editable mode (no -e on pip install)."""
+
+from os import path
+import subprocess
+
+# install all packages
+subprocess.check_call(
+    (
+        path.join(".", "cmd_pkgs_in_dep_order.py") + " pip install .[dev]"
+    ).split()
+)
diff --git a/python-packages/install_editable b/python-packages/install_editable
new file mode 100755
index 0000000000..6ac68b289c
--- /dev/null
+++ b/python-packages/install_editable
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+"""Script to install all packages in editable mode (pip install -e .)."""
+
+from os import path
+import subprocess
+
+# install all packages
+subprocess.check_call(
+    (
+        path.join(".", "cmd_pkgs_in_dep_order.py") + " pip install -e .[dev]"
+    ).split()
+)
diff --git a/python-packages/lint b/python-packages/lint
new file mode 100755
index 0000000000..0974f273c6
--- /dev/null
+++ b/python-packages/lint
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+"""Script to run linters against local copy of all components."""
+
+from os import path
+import subprocess
+
+subprocess.check_call(
+    (
+        f"{path.join('.', 'cmd_pkgs_in_dep_order.py')}"
+        + f" {path.join('.', 'setup.py')} lint"
+    ).split()
+)
diff --git a/python-packages/sra_client/setup.py b/python-packages/sra_client/setup.py
index b47f71ae74..0921149bd4 100755
--- a/python-packages/sra_client/setup.py
+++ b/python-packages/sra_client/setup.py
@@ -48,6 +48,15 @@ def run(self):
         subprocess.check_call("twine upload dist/*".split())  # nosec
 
 
+class LintCommand(distutils.command.build_py.build_py):
+    """No-op lint command to support top-level lint script."""
+
+    description = "No-op"
+
+    def run(self):
+        pass
+
+
 setup(
     name=NAME,
     version=VERSION,
@@ -63,5 +72,6 @@ def run(self):
     cmdclass={
         "test_publish": TestPublishCommand,
         "publish": PublishCommand,
+        "lint": LintCommand,
     },
 )
diff --git a/python-packages/test b/python-packages/test
new file mode 100755
index 0000000000..5bf37cca3f
--- /dev/null
+++ b/python-packages/test
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+"""Script to run tests against local copy of all components."""
+
+from os import path
+import subprocess
+
+subprocess.check_call(
+    (
+        f"{path.join('.', 'cmd_pkgs_in_dep_order.py')}"
+        + f" {path.join('.', 'setup.py')} test"
+    ).split()
+)

From 46c72f2ee67ee1edf03cde020da1b0a963de99a9 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 12:05:26 -0500
Subject: [PATCH 09/17] prettierignore files in local python dev env

---
 .prettierignore | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.prettierignore b/.prettierignore
index a509c4f882..9d8f611c1a 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -27,3 +27,6 @@ lib
 package.json
 scripts/postpublish_utils.js
 packages/sol-cov/test/fixtures/artifacts
+.mypy_cache
+.tox
+.pytest_cache

From 4febc6d80ba0a19fef4d8e8c8f6c2a015198261b Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 14:06:21 -0500
Subject: [PATCH 10/17] Correct missing coverage analysis for sra_client

---
 .circleci/config.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9b203c323c..607df9b966 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -360,6 +360,9 @@ jobs:
             - restore_cache:
                   keys:
                       - coverage-python-contract-demo-{{ .Environment.CIRCLE_SHA1 }}
+            - restore_cache:
+                  keys:
+                      - coverage-python-sra-client-{{ .Environment.CIRCLE_SHA1 }}
             - restore_cache:
                   keys:
                       - coverage-python-order-utils-{{ .Environment.CIRCLE_SHA1 }}

From b2b19b11496243de5bd332e9f459caa1ca972b70 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Fri, 4 Jan 2019 14:53:28 -0500
Subject: [PATCH 11/17] CI cache lint: don't save, re-use from test-python

---
 .circleci/config.yml | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 607df9b966..c1bb7a5b94 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -278,11 +278,6 @@ jobs:
                       cd python-packages
                       ./install
                       ./lint
-            - save_cache:
-                  key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
-                  paths:
-                      - '/usr/local/bin'
-                      - '/usr/local/lib/python3.7/site-packages'
     static-tests:
         working_directory: ~/repo
         docker:
@@ -400,6 +395,9 @@ workflows:
                   requires:
                       - test-rest
                       - test-python
+            - static-tests-python:
+                  requires:
+                      - test-python
             - test-python
             # skip python tox run for now, as we don't yet have multiple test environments to support.
             #- test-rest-python

From 7ae3b8272c9ba815ea11b25eb8b28b21e42aa2a4 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 17:11:05 -0500
Subject: [PATCH 12/17] correct merge mistake

---
 .circleci/config.yml | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0d2d6b0e07..9dbd8f1993 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -210,10 +210,6 @@ jobs:
                   paths:
                       - '/usr/local/bin'
                       - '/usr/local/lib/python3.7/site-packages'
-                      cd python-packages/json_schemas
-                      coverage run setup.py test
-            - run:
-                  command: |
             - run:
                   command: |
                       cd python-packages

From 0a56374c00b4df60c363c8091953fdacbf310d07 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 17:01:52 -0500
Subject: [PATCH 13/17] tag hacks as hacks

---
 python-packages/contract_artifacts/setup.py | 2 +-
 python-packages/json_schemas/setup.py       | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/python-packages/contract_artifacts/setup.py b/python-packages/contract_artifacts/setup.py
index 7d738e48f0..8d93fc3fab 100755
--- a/python-packages/contract_artifacts/setup.py
+++ b/python-packages/contract_artifacts/setup.py
@@ -30,7 +30,7 @@ def run(self):
             "mypy src setup.py".split(),
             # security issue checker:
             "bandit -r src ./setup.py".split(),
-            # ensure contract artifacts match the authoritative copies:
+            # HACK: ensure contract artifacts match the authoritative copies:
             # this is a hack.  ideally we would symlink to the authoritative
             # copies, but a problem with setuptools is preventing it from
             # following symlinks when gathering package_data.  see
diff --git a/python-packages/json_schemas/setup.py b/python-packages/json_schemas/setup.py
index 5c1e66d95e..be4468e5c7 100755
--- a/python-packages/json_schemas/setup.py
+++ b/python-packages/json_schemas/setup.py
@@ -41,10 +41,10 @@ def run(self):
             "mypy src test setup.py".split(),
             # security issue checker:
             "bandit -r src ./setup.py".split(),
-            # ensure json schemas don't differ from the authoritative copies:
-            # this is a hack.  ideally we would symlink to the authoritative
-            # copies, but a problem with setuptools is preventing it from
-            # following symlinks when gathering package_data.  see
+            # HACK: ensure json schemas don't differ from the authoritative
+            # copies: this is a hack.  ideally we would symlink to the
+            # authoritative copies, but a problem with setuptools is preventing
+            # it from following symlinks when gathering package_data.  see
             # https://github.com/pypa/setuptools/issues/415.
             (
                 "diff src/zero_ex/json_schemas/schemas"

From fa5230e896f25400fc0383256dec10a909f2b581 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 17:06:58 -0500
Subject: [PATCH 14/17] remove local strip_0x() in favor of eth_utils

---
 .../src/zero_ex/order_utils/__init__.py           | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
index 867f59d719..4697ad99cc 100644
--- a/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
+++ b/python-packages/order_utils/src/zero_ex/order_utils/__init__.py
@@ -18,7 +18,7 @@
 
 from mypy_extensions import TypedDict
 
-from eth_utils import keccak, to_bytes, to_checksum_address
+from eth_utils import keccak, remove_0x_prefix, to_bytes, to_checksum_address
 from web3 import Web3
 import web3.exceptions
 from web3.providers.base import BaseProvider
@@ -214,13 +214,12 @@ def jsdict_order_to_struct(jsdict: dict) -> Order:
 
     order = cast(Order, copy(jsdict))
 
-    def strip_0x(hex_string: str) -> str:
-        if hex_string.startswith("0x"):
-            return hex_string[2:]
-        return hex_string
-
-    order["makerAssetData"] = bytes.fromhex(strip_0x(jsdict["makerAssetData"]))
-    order["takerAssetData"] = bytes.fromhex(strip_0x(jsdict["takerAssetData"]))
+    order["makerAssetData"] = bytes.fromhex(
+        remove_0x_prefix(jsdict["makerAssetData"])
+    )
+    order["takerAssetData"] = bytes.fromhex(
+        remove_0x_prefix(jsdict["takerAssetData"])
+    )
 
     del order["exchangeAddress"]  # type: ignore
     # silence mypy pending release of

From c8922af8bc401aa55f09ff9737376434e8c8e0a2 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 17:35:50 -0500
Subject: [PATCH 15/17] remove json schemas from old order_utils location

---
 .../src/zero_ex/json_schemas/py.typed         |  0
 .../json_schemas/schemas/address_schema.json  |  5 --
 .../asset_pairs_request_opts_schema.json      |  8 ---
 .../schemas/block_param_schema.json           | 11 ----
 .../schemas/block_range_schema.json           |  8 ---
 .../schemas/call_data_schema.json             | 27 ----------
 .../ec_signature_parameter_schema.json        |  5 --
 .../schemas/ec_signature_schema.json          | 14 -----
 .../schemas/eip712_typed_data_schema.json     | 28 ----------
 .../json_schemas/schemas/hex_schema.json      |  5 --
 .../schemas/index_filter_values_schema.json   |  7 ---
 .../json_schemas/schemas/js_number.json       |  5 --
 .../json_schemas/schemas/number_schema.json   |  5 --
 .../schemas/order_cancel_schema.json          | 12 -----
 .../schemas/order_config_request_schema.json  | 24 ---------
 .../order_fill_or_kill_requests_schema.json   | 12 -----
 .../schemas/order_fill_requests_schema.json   | 12 -----
 .../schemas/order_hash_schema.json            |  5 --
 .../json_schemas/schemas/order_schema.json    | 34 ------------
 ...der_watcher_web_socket_request_schema.json | 52 -------------------
 ...atcher_web_socket_utf8_message_schema.json | 10 ----
 .../schemas/orderbook_request_schema.json     |  9 ----
 .../schemas/orders_request_opts_schema.json   | 19 -------
 .../json_schemas/schemas/orders_schema.json   |  5 --
 .../schemas/paged_request_opts_schema.json    |  8 ---
 .../schemas/paginated_collection_schema.json  | 10 ----
 ..._api_asset_data_pairs_response_schema.json | 13 -----
 .../relayer_api_asset_data_pairs_schema.json  | 12 -----
 ...ayer_api_asset_data_trade_info_schema.json | 11 ----
 .../relayer_api_error_response_schema.json    | 21 --------
 ...er_api_fee_recipients_response_schema.json | 16 ------
 ...layer_api_order_config_payload_schema.json | 24 ---------
 ...ayer_api_order_config_response_schema.json | 11 ----
 .../schemas/relayer_api_order_schema.json     |  9 ----
 ...relayer_api_orderbook_response_schema.json |  9 ----
 ...ders_channel_subscribe_payload_schema.json | 14 -----
 ...r_api_orders_channel_subscribe_schema.json | 11 ----
 ...orders_channel_update_response_schema.json | 11 ----
 .../relayer_api_orders_response_schema.json   | 13 -----
 .../schemas/relayer_api_orders_schema.json    |  5 --
 .../schemas/request_opts_schema.json          |  7 ---
 .../schemas/signed_order_schema.json          | 12 -----
 .../schemas/signed_orders_schema.json         |  5 --
 .../json_schemas/schemas/token_schema.json    | 11 ----
 .../json_schemas/schemas/tx_data_schema.json  | 26 ----------
 .../schemas/whole_number_schema.json          | 12 -----
 .../schemas/zero_ex_transaction_schema.json   | 10 ----
 47 files changed, 603 deletions(-)
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/py.typed
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
 delete mode 100644 python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json

diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/py.typed b/python-packages/order_utils/src/zero_ex/json_schemas/py.typed
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
deleted file mode 100644
index 0dc02d3313..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/address_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/addressSchema",
-    "type": "string",
-    "pattern": "^0x[0-9a-f]{40}$"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
deleted file mode 100644
index 174a8fdc32..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/asset_pairs_request_opts_schema.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-    "id": "/AssetPairsRequestOpts",
-    "type": "object",
-    "properties": {
-        "assetDataA": { "$ref": "/hexSchema" },
-        "assetDataB": { "$ref": "/hexSchema" }
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
deleted file mode 100644
index ed4dd1e875..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_param_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/blockParamSchema",
-    "oneOf": [
-        {
-            "type": "number"
-        },
-        {
-            "enum": ["latest", "earliest", "pending"]
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
deleted file mode 100644
index b142946490..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/block_range_schema.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-    "id": "/blockRangeSchema",
-    "properties": {
-        "fromBlock": { "$ref": "/blockParamSchema" },
-        "toBlock": { "$ref": "/blockParamSchema" }
-    },
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
deleted file mode 100644
index c5972e8c18..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/call_data_schema.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-    "id": "/callDataSchema",
-    "properties": {
-        "from": { "$ref": "/addressSchema" },
-        "to": { "$ref": "/addressSchema" },
-        "value": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "gas": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "gasPrice": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "data": {
-            "type": "string",
-            "pattern": "^0x[0-9a-f]*$"
-        },
-        "nonce": {
-            "type": "number",
-            "minimum": 0
-        }
-    },
-    "required": [],
-    "type": "object",
-    "additionalProperties": false
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
deleted file mode 100644
index 0c08ec2403..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_parameter_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/ecSignatureParameterSchema",
-    "type": "string",
-    "pattern": "^0[xX][0-9A-Fa-f]{64}$"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
deleted file mode 100644
index bc79ca5e96..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/ec_signature_schema.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-    "id": "/ECSignature",
-    "properties": {
-        "v": {
-            "type": "number",
-            "minimum": 27,
-            "maximum": 28
-        },
-        "r": { "$ref": "/ecSignatureParameterSchema" },
-        "s": { "$ref": "/ecSignatureParameterSchema" }
-    },
-    "required": ["v", "r", "s"],
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
deleted file mode 100644
index 8efd6de448..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/eip712_typed_data_schema.json
+++ /dev/null
@@ -1,28 +0,0 @@
-{
-    "id": "/eip712TypedDataSchema",
-    "type": "object",
-    "properties": {
-        "types": {
-            "type": "object",
-            "properties": {
-                "EIP712Domain": { "type": "array" }
-            },
-            "additionalProperties": {
-                "type": "array",
-                "items": {
-                    "type": "object",
-                    "properties": {
-                        "name": { "type": "string" },
-                        "type": { "type": "string" }
-                    },
-                    "required": ["name", "type"]
-                }
-            },
-            "required": ["EIP712Domain"]
-        },
-        "primaryType": { "type": "string" },
-        "domain": { "type": "object" },
-        "message": { "type": "object" }
-    },
-    "required": ["types", "primaryType", "domain", "message"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
deleted file mode 100644
index f37815d5bd..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/hex_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/hexSchema",
-    "type": "string",
-    "pattern": "^0x(([0-9a-f][0-9a-f])+)?$"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
deleted file mode 100644
index bec00d79e8..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/index_filter_values_schema.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-    "id": "/indexFilterValuesSchema",
-    "additionalProperties": {
-        "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/addressSchema" }, { "$ref": "/orderHashSchema" }]
-    },
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
deleted file mode 100644
index 6a72d92c07..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/js_number.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/jsNumber",
-    "type": "number",
-    "minimum": 0
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
deleted file mode 100644
index a48f3e8cff..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/number_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/numberSchema",
-    "type": "string",
-    "pattern": "^\\d+(\\.\\d+)?$"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
deleted file mode 100644
index 8d0999941a..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_cancel_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/orderCancellationRequestsSchema",
-    "type": "array",
-    "items": {
-        "properties": {
-            "order": { "$ref": "/orderSchema" },
-            "takerTokenCancelAmount": { "$ref": "/wholeNumberSchema" }
-        },
-        "required": ["order", "takerTokenCancelAmount"],
-        "type": "object"
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
deleted file mode 100644
index ca9b2e30ee..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_config_request_schema.json
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-    "id": "/OrderConfigRequest",
-    "type": "object",
-    "properties": {
-        "makerAddress": { "$ref": "/addressSchema" },
-        "takerAddress": { "$ref": "/addressSchema" },
-        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "makerAssetData": { "$ref": "/hexSchema" },
-        "takerAssetData": { "$ref": "/hexSchema" },
-        "exchangeAddress": { "$ref": "/addressSchema" },
-        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
-    },
-    "required": [
-        "makerAddress",
-        "takerAddress",
-        "makerAssetAmount",
-        "takerAssetAmount",
-        "makerAssetData",
-        "takerAssetData",
-        "exchangeAddress",
-        "expirationTimeSeconds"
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
deleted file mode 100644
index 73bbf20bb1..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_or_kill_requests_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/orderFillOrKillRequestsSchema",
-    "type": "array",
-    "items": {
-        "properties": {
-            "signedOrder": { "$ref": "/signedOrderSchema" },
-            "fillTakerAmount": { "$ref": "/wholeNumberSchema" }
-        },
-        "required": ["signedOrder", "fillTakerAmount"],
-        "type": "object"
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
deleted file mode 100644
index d06fb19a29..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_fill_requests_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/orderFillRequestsSchema",
-    "type": "array",
-    "items": {
-        "properties": {
-            "signedOrder": { "$ref": "/signedOrderSchema" },
-            "takerTokenFillAmount": { "$ref": "/wholeNumberSchema" }
-        },
-        "required": ["signedOrder", "takerTokenFillAmount"],
-        "type": "object"
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
deleted file mode 100644
index 4a770579fc..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_hash_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/orderHashSchema",
-    "type": "string",
-    "pattern": "^0x[0-9a-fA-F]{64}$"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
deleted file mode 100644
index c70b9e2ddf..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_schema.json
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-    "id": "/orderSchema",
-    "properties": {
-        "makerAddress": { "$ref": "/addressSchema" },
-        "takerAddress": { "$ref": "/addressSchema" },
-        "makerFee": { "$ref": "/wholeNumberSchema" },
-        "takerFee": { "$ref": "/wholeNumberSchema" },
-        "senderAddress": { "$ref": "/addressSchema" },
-        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "makerAssetData": { "$ref": "/hexSchema" },
-        "takerAssetData": { "$ref": "/hexSchema" },
-        "salt": { "$ref": "/wholeNumberSchema" },
-        "exchangeAddress": { "$ref": "/addressSchema" },
-        "feeRecipientAddress": { "$ref": "/addressSchema" },
-        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
-    },
-    "required": [
-        "makerAddress",
-        "takerAddress",
-        "makerFee",
-        "takerFee",
-        "senderAddress",
-        "makerAssetAmount",
-        "takerAssetAmount",
-        "makerAssetData",
-        "takerAssetData",
-        "salt",
-        "exchangeAddress",
-        "feeRecipientAddress",
-        "expirationTimeSeconds"
-    ],
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
deleted file mode 100644
index b0c419f94f..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_request_schema.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-    "id": "/orderWatcherWebSocketRequestSchema",
-    "type": "object",
-    "definitions": {
-        "signedOrderParam": {
-            "type": "object",
-            "properties": {
-                "signedOrder": { "$ref": "/signedOrderSchema" }
-            },
-            "required": ["signedOrder"]
-        },
-        "orderHashParam": {
-            "type": "object",
-            "properties": {
-                "orderHash": { "$ref": "/hexSchema" }
-            },
-            "required": ["orderHash"]
-        }
-    },
-    "oneOf": [
-        {
-            "type": "object",
-            "properties": {
-                "id": { "type": "number" },
-                "jsonrpc": { "type": "string" },
-                "method": { "enum": ["ADD_ORDER"] },
-                "params": { "$ref": "#/definitions/signedOrderParam" }
-            },
-            "required": ["id", "jsonrpc", "method", "params"]
-        },
-        {
-            "type": "object",
-            "properties": {
-                "id": { "type": "number" },
-                "jsonrpc": { "type": "string" },
-                "method": { "enum": ["REMOVE_ORDER"] },
-                "params": { "$ref": "#/definitions/orderHashParam" }
-            },
-            "required": ["id", "jsonrpc", "method", "params"]
-        },
-        {
-            "type": "object",
-            "properties": {
-                "id": { "type": "number" },
-                "jsonrpc": { "type": "string" },
-                "method": { "enum": ["GET_STATS"] },
-                "params": {}
-            },
-            "required": ["id", "jsonrpc", "method"]
-        }
-    ] 
-}
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
deleted file mode 100644
index 154d6d754d..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/order_watcher_web_socket_utf8_message_schema.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "id": "/orderWatcherWebSocketUtf8MessageSchema",
-    "properties": {
-        "utf8Data": { "type": "string" }
-    },
-    "required": [
-        "utf8Data"
-    ],
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
deleted file mode 100644
index 27848bdcb1..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orderbook_request_schema.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "id": "/OrderBookRequest",
-    "type": "object",
-    "properties": {
-        "baseAssetData": { "$ref": "/hexSchema" },
-        "quoteAssetData": { "$ref": "/hexSchema" }
-    },
-    "required": ["baseAssetData", "quoteAssetData"]
-}
\ No newline at end of file
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
deleted file mode 100644
index 10da510607..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_request_opts_schema.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-    "id": "/OrdersRequestOpts",
-    "type": "object",
-    "properties": {
-        "makerAssetProxyId": { "$ref": "/hexSchema" },
-        "takerAssetProxyId": { "$ref": "/hexSchema" },
-        "makerAssetAddress": { "$ref": "/addressSchema" },
-        "takerAssetAddress": { "$ref": "/addressSchema" },
-        "exchangeAddress": { "$ref": "/addressSchema" },
-        "senderAddress": { "$ref": "/addressSchema" },
-        "makerAssetData": { "$ref": "/hexSchema" },
-        "takerAssetData": { "$ref": "/hexSchema" },
-        "traderAssetData": { "$ref": "/hexSchema" },
-        "makerAddress": { "$ref": "/addressSchema" },
-        "takerAddress": { "$ref": "/addressSchema" },
-        "traderAddress": { "$ref": "/addressSchema" },
-        "feeRecipientAddress": { "$ref": "/addressSchema" }
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
deleted file mode 100644
index 1e1c6a8751..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/orders_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/ordersSchema",
-    "type": "array",
-    "items": { "$ref": "/orderSchema" }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
deleted file mode 100644
index 7cfc73947b..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paged_request_opts_schema.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-    "id": "/PagedRequestOpts",
-    "type": "object",
-    "properties": {
-        "page": { "type": "number" },
-        "perPage": { "type": "number" }
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
deleted file mode 100644
index 9dcedf5b47..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/paginated_collection_schema.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "id": "/paginatedCollectionSchema",
-    "type": "object",
-    "properties": {
-        "total": { "type": "number" },
-        "perPage": { "type": "number" },
-        "page": { "type": "number" }
-    },
-    "required": ["total", "perPage", "page"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
deleted file mode 100644
index d1150d3dbc..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_response_schema.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-    "id": "/relayerApiAssetDataPairsResponseSchema",
-    "type": "object",
-    "allOf": [
-        { "$ref": "/paginatedCollectionSchema" },
-        {
-            "properties": {
-                "records": { "$ref": "/relayerApiAssetDataPairsSchema" }
-            },
-            "required": ["records"]
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
deleted file mode 100644
index 62d4745b8c..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_pairs_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/relayerApiAssetDataPairsSchema",
-    "type": "array",
-    "items": {
-        "properties": {
-            "assetDataA": { "$ref": "/relayerApiAssetDataTradeInfoSchema" },
-            "assetDataB": { "$ref": "/relayerApiAssetDataTradeInfoSchema" }
-        },
-        "required": ["assetDataA", "assetDataB"],
-        "type": "object"
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
deleted file mode 100644
index e0f274c5d8..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_asset_data_trade_info_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/relayerApiAssetDataTradeInfoSchema",
-    "type": "object",
-    "properties": {
-        "assetData": { "$ref": "/hexSchema" },
-        "minAmount": { "$ref": "/wholeNumberSchema" },
-        "maxAmount": { "$ref": "/wholeNumberSchema" },
-        "precision": { "type": "number" }
-    },
-    "required": ["assetData"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
deleted file mode 100644
index be4659b0bd..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_error_response_schema.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-    "id": "/relayerApiErrorResponseSchema",
-    "type": "object",
-    "properties": {
-        "code": { "type": "integer", "minimum": 100, "maximum": 103 },
-        "reason": { "type": "string" },
-        "validationErrors": {
-            "type": "array",
-            "items": {
-                "type": "object",
-                "properties": {
-                    "field": { "type": "string" },
-                    "code": { "type": "integer", "minimum": 1000, "maximum": 1006 },
-                    "reason": { "type": "string" }
-                },
-                "required": ["field", "code", "reason"]
-            }
-        }
-    },
-    "required": ["code", "reason"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
deleted file mode 100644
index c73506dbb1..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_fee_recipients_response_schema.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-    "id": "/relayerApiFeeRecipientsResponseSchema",
-    "type": "object",
-    "allOf": [
-        { "$ref": "/paginatedCollectionSchema" },
-        {
-            "properties": {
-                "records": {
-                    "type": "array",
-                    "items": { "$ref": "/addressSchema" }
-                }
-            },
-            "required": ["records"]
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
deleted file mode 100644
index f4583fc625..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_payload_schema.json
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-    "id": "/relayerApiOrderConfigPayloadSchema",
-    "type": "object",
-    "properties": {
-        "makerAddress": { "$ref": "/addressSchema" },
-        "takerAddress": { "$ref": "/addressSchema" },
-        "makerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "takerAssetAmount": { "$ref": "/wholeNumberSchema" },
-        "makerAssetData": { "$ref": "/hexSchema" },
-        "takerAssetData": { "$ref": "/hexSchema" },
-        "exchangeAddress": { "$ref": "/addressSchema" },
-        "expirationTimeSeconds": { "$ref": "/wholeNumberSchema" }
-    },
-    "required": [
-        "makerAddress",
-        "takerAddress",
-        "makerAssetAmount",
-        "takerAssetAmount",
-        "makerAssetData",
-        "takerAssetData",
-        "exchangeAddress",
-        "expirationTimeSeconds"
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
deleted file mode 100644
index 8193861e12..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_config_response_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/relayerApiOrderConfigResponseSchema",
-    "type": "object",
-    "properties": {
-        "makerFee": { "$ref": "/wholeNumberSchema" },
-        "takerFee": { "$ref": "/wholeNumberSchema" },
-        "feeRecipientAddress": { "$ref": "/addressSchema" },
-        "senderAddress": { "$ref": "/addressSchema" }
-    },
-    "required": ["makerFee", "takerFee", "feeRecipientAddress", "senderAddress"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
deleted file mode 100644
index e0f6539b9f..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_order_schema.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "id": "/relayerApiOrderSchema",
-    "type": "object",
-    "properties": {
-        "order": { "$ref": "/orderSchema" },
-        "metaData": { "type": "object" }
-    },
-    "required": ["order", "metaData"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
deleted file mode 100644
index b44f2a7408..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orderbook_response_schema.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-    "id": "/relayerApiOrderbookResponseSchema",
-    "type": "object",
-    "properties": {
-        "bids": { "$ref": "/relayerApiOrdersResponseSchema" },
-        "asks": { "$ref": "/relayerApiOrdersResponseSchema" }
-    },
-    "required": ["bids", "asks"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
deleted file mode 100644
index 274ef1625a..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_payload_schema.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-    "id": "/relayerApiOrdersChannelSubscribePayloadSchema",
-    "type": "object",
-    "properties": {
-        "makerAssetProxyId": { "$ref": "/hexSchema" },
-        "takerAssetProxyId": { "$ref": "/hexSchema" },
-        "networkId": { "type": "number" },
-        "makerAssetAddress": { "$ref": "/addressSchema" },
-        "takerAssetAddress": { "$ref": "/addressSchema" },
-        "makerAssetData": { "$ref": "/hexSchema" },
-        "takerAssetData": { "$ref": "/hexSchema" },
-        "traderAssetData": { "$ref": "/hexSchema" }
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
deleted file mode 100644
index 29561d09fc..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_subscribe_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/relayerApiOrdersChannelSubscribeSchema",
-    "type": "object",
-    "properties": {
-        "type": { "enum": ["subscribe"] },
-        "channel": { "enum": ["orders"] },
-        "requestId": { "type": "string" },
-        "payload": { "$ref": "/relayerApiOrdersChannelSubscribePayloadSchema" }
-    },
-    "required": ["type", "channel", "requestId"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
deleted file mode 100644
index 239e7c5861..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_channel_update_response_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/relayerApiOrdersChannelUpdateSchema",
-    "type": "object",
-    "properties": {
-        "type": { "enum": ["update"] },
-        "channel": { "enum": ["orders"] },
-        "requestId": { "type": "string" },
-        "payload": { "$ref": "/relayerApiOrdersSchema" }
-    },
-    "required": ["type", "channel", "requestId"]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
deleted file mode 100644
index a5023a3fc1..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_response_schema.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-    "id": "/relayerApiOrdersResponseSchema",
-    "type": "object",
-    "allOf": [
-        { "$ref": "/paginatedCollectionSchema" },
-        {
-            "properties": {
-                "records": { "$ref": "/relayerApiOrdersSchema" }
-            },
-            "required": ["records"]
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
deleted file mode 100644
index 84e75cd045..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/relayer_api_orders_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/relayerApiOrdersSchema",
-    "type": "array",
-    "items": { "$ref": "/relayerApiOrderSchema" }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
deleted file mode 100644
index b50547d180..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/request_opts_schema.json
+++ /dev/null
@@ -1,7 +0,0 @@
-{
-    "id": "/RequestOpts",
-    "type": "object",
-    "properties": {
-        "networkId": { "type": "number" }
-    }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
deleted file mode 100644
index 137ae4a249..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_order_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/signedOrderSchema",
-    "allOf": [
-        { "$ref": "/orderSchema" },
-        {
-            "properties": {
-                "signature": { "$ref": "/hexSchema" }
-            },
-            "required": ["signature"]
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
deleted file mode 100644
index e7c3a0b6c9..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/signed_orders_schema.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "id": "/signedOrdersSchema",
-    "type": "array",
-    "items": { "$ref": "/signedOrderSchema" }
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
deleted file mode 100644
index 31e41c4b87..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/token_schema.json
+++ /dev/null
@@ -1,11 +0,0 @@
-{
-    "id": "/tokenSchema",
-    "properties": {
-        "name": { "type": "string" },
-        "symbol": { "type": "string" },
-        "decimals": { "type": "number" },
-        "address": { "$ref": "/addressSchema" }
-    },
-    "required": ["name", "symbol", "decimals", "address"],
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
deleted file mode 100644
index 4643521ce4..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/tx_data_schema.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    "id": "/txDataSchema",
-    "properties": {
-        "from": { "$ref": "/addressSchema" },
-        "to": { "$ref": "/addressSchema" },
-        "value": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "gas": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "gasPrice": {
-            "oneOf": [{ "$ref": "/numberSchema" }, { "$ref": "/jsNumber" }]
-        },
-        "data": {
-            "type": "string",
-            "pattern": "^0x[0-9a-f]*$"
-        },
-        "nonce": {
-            "type": "number",
-            "minimum": 0
-        }
-    },
-    "required": ["from"],
-    "type": "object"
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
deleted file mode 100644
index aa469954ca..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/whole_number_schema.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "id": "/wholeNumberSchema",
-    "anyOf": [
-        {
-            "type": "string",
-            "pattern": "^\\d+$"
-        },
-        {
-            "type": "integer"
-        }
-    ]
-}
diff --git a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json b/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json
deleted file mode 100644
index 0c714f14d9..0000000000
--- a/python-packages/order_utils/src/zero_ex/json_schemas/schemas/zero_ex_transaction_schema.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-    "id": "/zeroExTransactionSchema",
-    "properties": {
-        "data": { "$ref": "/hexSchema" },
-        "signerAddress": { "$ref": "/addressSchema" },
-        "salt": { "$ref": "/wholeNumberSchema" }
-    },
-    "required": ["data", "salt", "signerAddress"],
-    "type": "object"
-}

From 766df750487053c3a932009003e5916697e1f4f2 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 17:50:10 -0500
Subject: [PATCH 16/17] correct merge mistake

---
 .circleci/config.yml | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9dbd8f1993..9c6c1082fa 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -276,21 +276,12 @@ jobs:
             - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7/site-packages
             - restore_cache:
                   key: deps9-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
-            - run:
-                  command: |
-                      cd python-packages/json_schemas
-                      python -m ensurepip
-                      python -m pip install .[dev]
             - run:
                   command: |
                       python -m ensurepip
                       cd python-packages
                       ./install
                       ./lint
-                      cd python-packages/json_schemas
-                      python setup.py lint
-            - run:
-                  command: |
     static-tests:
         working_directory: ~/repo
         docker:

From ced598c047e88af8c37894c98c8e9f27c6526bb0 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <feuGeneA@users.noreply.github.com>
Date: Tue, 8 Jan 2019 18:01:04 -0500
Subject: [PATCH 17/17] doctest json schemas via command-line, not code

---
 python-packages/json_schemas/setup.py         |  2 +-
 .../json_schemas/test/test_doctest.py         | 25 -------------------
 2 files changed, 1 insertion(+), 26 deletions(-)
 delete mode 100644 python-packages/json_schemas/test/test_doctest.py

diff --git a/python-packages/json_schemas/setup.py b/python-packages/json_schemas/setup.py
index be4468e5c7..389d145913 100755
--- a/python-packages/json_schemas/setup.py
+++ b/python-packages/json_schemas/setup.py
@@ -20,7 +20,7 @@ def run_tests(self):
         """Invoke pytest."""
         import pytest
 
-        exit(pytest.main())
+        exit(pytest.main(["--doctest-modules"]))
 
 
 class LintCommand(distutils.command.build_py.build_py):
diff --git a/python-packages/json_schemas/test/test_doctest.py b/python-packages/json_schemas/test/test_doctest.py
deleted file mode 100644
index 2aa576422b..0000000000
--- a/python-packages/json_schemas/test/test_doctest.py
+++ /dev/null
@@ -1,25 +0,0 @@
-"""Exercise doctests for all of our modules."""
-
-from doctest import testmod
-import pkgutil
-import importlib
-
-import zero_ex.json_schemas
-
-
-def test_all_doctests():
-    """Gather zero_ex.json_schemas.* modules and doctest them."""
-    # json_schemas module
-    module = "zero_ex.json_schemas"
-    print(module)
-    failure_count, _ = testmod(importlib.import_module(module))
-    assert failure_count == 0
-
-    # any json_schemas.* sub-modules
-    for (_, modname, _) in pkgutil.walk_packages(
-        path=zero_ex.json_schemas.__path__, prefix="zero_ex.json_schemas"
-    ):
-        module = importlib.import_module(modname)
-        print(module)
-        (failure_count, _) = testmod(module)
-        assert failure_count == 0