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openapi: 3.0.2
info:
title: Layer Akira API
description: API documentation for Layer Akira
version: 1.0.0
servers:
- url: https://api-testnet.layerakira.xyz
paths:
/sign/request_sign_data:
get:
summary: Get Sign Data
description: Retrieves data that the client needs to sign via the private key of the signer to show that they are the real owner of the account.
parameters:
- in: query
name: user
required: true
schema:
type: string
example: "0x03e56dd52f96df3bc130f7a0b241dfed26b4a280d28a199e1e857f6d8acbb666"
description: The public key responsible for signing actions on behalf of the account.
- in: query
name: account
required: true
schema:
type: string
example: "0x033e29bc9B537BAe4e370559331E2bf35b434b566f41a64601b37f410f46a580"
description: The trading account.
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/ResultSignData'
examples:
SignDataIssued:
value:
result: "challenge sign data"
'400':
description: Invalid input
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
WrongUser:
value:
code: 400
error: "Wrong user"
WrongAccount:
value:
code: 400
error: "Wrong account"
'401':
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
Unauthorized:
value:
code: 401
error: "User account not whitelisted"
'429':
description: Rate limit exceeded
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
RateLimitExceeded:
value:
code: 429
error: "Rate limit exceeded. Suggested sleep time: 1000ms"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
ServerError:
value:
code: 500
error: "Internal server error"
/sign/auth:
post:
summary: Issue JWT
description: |
Issues jwt token to be able to interact with rest exchange endpoints.
Note that user account should be deployed on chain.
The following typed message should we be signed.
Exchange expects either onchain signature or signature by the signer which binded to trader in layerakira smart contract.
```json
{
"domain": {
"name": "LayerAkira Exchange",
"version": "0.0.1",
"chainId": "<MAINNET|SEPOLIA>"
},
"types": {
"StarkNetDomain": [
{"name": "name", "type": "felt"},
{"name": "version", "type": "felt"},
{"name": "chainId", "type": "felt"}
],
"Message": [
{"name": "welcome", "type": "string"},
{"name": "to", "type": "string"},
{"name": "exchange", "type": "string"}
]
},
"primaryType": "Message",
"message": {
"welcome": "Sign in to LayerAkira",
"to": "\tChallenge:",
"exchange": "place response challenge from /sign/request_sign_data"
}
}
```
# description: User would need to sign challenge received via request_sign_data that would be inserted into typed message. Refer to documentation chapter about auth.
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
msg:
type: string
description: The SignData from the getSignData endpoint.
example: "Some sign data"
signature:
items:
type: string
description: The stringified signature of the typed message wrt to snip revision 0.
example: [ '0x1234abcd','0x1234...', '0x123..' ]
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/ResultAuth'
examples:
JwtTokenIssued:
value:
result: "JWT token"
'400':
description: Invalid input
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
InvalidInput:
value:
code: 400
error: "Invalid msg or signature parameter"
MessageExpired:
value:
code: 400
error: "Message expired"
IssueWithChain:
value:
code: 400
error: "Invalid onchain signature for 0x..."
InvalidSignature:
value:
code: 400
error: "Invalid signature"
'429':
description: Rate limit exceeded
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
RateLimitExceeded:
value:
code: 429
error: "Rate limit exceeded. Suggested sleep time: 1000ms"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
ServerError:
value:
code: 500
error: "Internal server error"
IssueWithChain:
value:
code: 500
error: "Issue with chain"
FailedToParse:
value:
code: 500
error: "Failed to parse request"
/gas/price:
get:
summary: Query current gas price
description: |
The takers would pay for gas per swap that happens with their order,
so trader need to specify max gas they are willing to spend per trade.
Usually user can use 25-50 percent premium over returned value to avoid frequently query this value from exchange.
The real gas price at time of chain settlement would reflect gas price of chain
security:
- AuthToken: [ ]
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/ResultQueryGas'
example:
value:
result: "1234456788907878798"
'401':
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 401
error: "Auth header required"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 500
error: "Internal server error"
/book/bbo:
get:
summary: Get best bid and best offer for particular trading pair
description: Retrieves best bid and best offer for particular trading pair
security:
- AuthToken: [ ]
parameters:
- in: query
name: base
required: true
schema:
type: string
example: "ETH"
description: Base symbol of trading pair
- in: query
name: quote
required: true
schema:
type: string
example: "USDC"
description: Quote symbol of trading pair
- in: query
name: to_ecosystem_book
required: true
schema:
type: integer
example: 0 or 1
description: Is book router or ecosystem
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/BBOResponse'
examples:
BothDefined:
value:
result:
to_ecosystem_book: false
bid:
price: "3170.6313"
volume: "0.4380538"
orders: 1
ask:
price: "3170.6538"
volume: "3170.6538"
orders: 1
pair: "AETH-AUSDC"
OneDefined:
value:
result:
to_ecosystem_book: false
bid: { }
ask:
price: "3170.6538"
volume: "3170.6538"
orders: 1
pair: "AETH-AUSDC"
EmptyBook:
value:
result:
to_ecosystem_book: false
bid: { }
ask: { }
pair: "AETH-AUSDC"
'404':
description: No book for specified trading pair
content:
application/json:
schema:
$ref: '#/components/schemas/BBOResponse'
example:
result:
to_ecosystem_book: false
bid: { }
ask: { }
pair: "AETH-AETH"
'422':
description: Wrong parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 422
error: "Wrong parameters"
'401':
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
Unauthorized:
value:
code: 401
error: "Auth header required"
'429':
description: Rate limit exceeded
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
RateLimitExceeded:
value:
code: 429
error: "Rate limit exceeded. Suggested sleep time: 1000ms"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
ServerError:
value:
code: 500
error: "Internal server error"
/book/snapshot:
get:
summary: Get book snapshot
description: |
Retrieves the book snapshot for particular trading pair and specified depth.
Client have 2 option to maintain book:
- periodic poll
- query snapshot, subscribe over websocket, apply updated incrementally. Msg_id is incremental
bids array already sorted from best bid to lowest bid
asks array already sorted from best offer to highest ask
security:
- AuthToken: [ ]
parameters:
- in: query
name: base
required: true
schema:
type: string
example: "ETH"
description: Base symbol of trading pair
- in: query
name: quote
required: true
schema:
type: string
example: "USDC"
description: Quote symbol of trading pair
- in: query
name: to_ecosystem_book
required: true
schema:
type: integer
example: 0 or 1
description: Is book router or ecosystem
- in: query
name: levels
required: false
schema:
type: integer
example: 0 or 1
description: How many levels of book should be retrieved, -1 refers to all
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/SnapshotResponse'
example:
result:
to_ecosystem_book: false
levels:
bids:
[ [ "3170.6313", "0.4380538", 1 ], [ "3170.3141", "0.5518194", 1 ], [ "3169.7316", "0.9523885", 1 ], [ "3169.0528", "0.5152233", 1 ], [ "3168.7976", "0.585468", 1 ], [ "3168.411", "0.8911725", 1 ], [ "3168.3633", "0.6783952", 1 ] ]
asks:
[ [ "3170.6538", "0.7230962", 1 ], [ "3170.7946", "0.7023717", 1 ], [ "3172.329", "0.764084", 1 ], [ "3172.7461", "0.5906632", 1 ], [ "3172.9463", "0.3627099", 1 ], [ "3173.6037", "0.8015292", 1 ], [ "3173.8306", "0.956762", 1 ], [ "3174.0809", "0.7838471", 1 ], [ "3174.8152", "0.468063", 1 ] ]
msg_id: "250"
pair: "AETH-AUSDC"
'404':
description: No book for specified trading pair
content:
application/json:
schema:
$ref: '#/components/schemas/BBOResponse'
example:
result:
to_ecosystem_book: false
levels:
asks: [ ]
bids: [ ]
msg_id: "0"
pair: "AETH-AETH"
'422':
description: Wrong parameters
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 422
error: "Wrong parameters"
'401':
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
Unauthorized:
value:
code: 401
error: "Auth header required"
'429':
description: Rate limit exceeded
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
RateLimitExceeded:
value:
code: 429
error: "Rate limit exceeded. Suggested sleep time: 1000ms"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
examples:
ServerError:
value:
code: 500
error: "Internal server error"
/user/listen_key:
get:
summary: Obtain listen key for websocket
description: |
In order to use websockets user need to obtain listen key.
Expiration for listen key is 30 minutes.
Subsequent invocation of get method will prolong listen key for another 30minutes
security:
- AuthToken: [ ]
responses:
'200':
description: Successful response
content:
application/json:
schema:
$ref: '#/components/schemas/ResultListenToken'
example:
value:
result: "xjkfdjkdsfsdkf"
'401':
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 401
error: "Auth header required"
'500':
description: Internal server error
content:
application/json:
schema:
$ref: '#/components/schemas/Result'
example:
value:
code: 500
error: "Internal server error"
/place_order:
post:
summary: Place an order
description: |
Schedules place of an order. Successful response means exchange validated request and now
put this request in processing queue. Actual result of place should be obtained over websocket stream.
User first need to sign place request with signer that was bind for his trading account in exchange contract
The following typed message should we be signed (example).
```json
{
"domain": {
"name": "LayerAkira Exchange",
"version": "0.0.1",
"chainId": "MAINNET|SEPOLIA"
},
"types": {
"StarkNetDomain": [
{
"name": "name",
"type": "felt"
},
{
"name": "version",
"type": "felt"
},
{
"name": "chainId",
"type": "felt"
}
],
"Order": [
{
"name": "maker",
"type": "felt"
},
{
"name": "price",
"type": "u256"
},
{
"name": "qty",
"type": "Quantity"
},
{
"name": "base",
"type": "felt"
},
{
"name": "quote",
"type": "felt"
},
{
"name": "fee",
"type": "OrderFee"
},
{
"name": "constraints",
"type": "Constraints"
},
{
"name": "salt",
"type": "felt"
},
{
"name": "flags",
"type": "OrderFlags"
},
{
"name": "exchange",
"type": "felt"
},
{
"name": "source",
"type": "felt"
}
{
"name": "sign_scheme",
"type": "felt"
},
],
"u256": [
{
"name": "low",
"type": "felt"
},
{
"name": "high",
"type": "felt"
}
],
"FixedFee": [
{
"name": "recipient",
"type": "felt"
},
{
"name": "maker_pbips",
"type": "felt"
},
{
"name": "taker_pbips",
"type": "felt"
},
{
"name": "apply_to_receipt_amount",
"type": "bool"
}
],
"Constraints": [
{
"name": "number_of_swaps_allowed",
"type": "felt"
},
{
"name": "duration_valid",
"type": "felt"
},
{
"name": "created_at",
"type": "felt"
},
{
"name": "stp",
"type": "felt"
},
{
"name": "nonce",
"type": "felt"
},
{
"name": "min_receive_amount",
"type": "u256"
},
{
"name": "router_signer",
"type": "felt"
}
],
"Quantity": [
{
"name": "base_qty",
"type": "u256"
},
{
"name": "quote_qty",
"type": "u256"
},
{
"name": "base_asset",
"type": "u256"
}
],
"GasFee": [
{
"name": "gas_per_action",
"type": "felt"
},
{
"name": "fee_token",
"type": "felt"
},
{
"name": "max_gas_price",
"type": "u256"
},
{
"name": "r0",
"type": "u256"
},
{
"name": "r1",
"type": "u256"
}
],
"OrderFee": [
{
"name": "trade_fee",
"type": "FixedFee"
},
{
"name": "router_fee",
"type": "FixedFee"
},
{
"name": "gas_fee",
"type": "GasFee"
}
],
"OrderFlags": [
{
"name": "full_fill_only",
"type": "bool"
},
{
"name": "best_level_only",
"type": "bool"
},
{
"name": "post_only",
"type": "bool"
},
{
"name": "is_sell_side",
"type": "bool"
},
{
"name": "is_market_order",
"type": "bool"
},
{
"name": "to_ecosystem_book",
"type": "bool"
},
{
"name": "external_funds",
"type": "bool"
}
]
},
"primaryType": "Order",
"message": {
"maker": "0x1234567890ABCDEF",
"price": {
"low": "3000000000",
"high": "0"
},
"qty": {
"base_qty": {
"low": "10000000000000000000000",
"high": "0"
},
"quote_qty": {
"low": "200000000",
"high": "0"
},
"base_asset": {
"low": "1000000000000000000",
"high": "0"
}
},
"base": "0x1",
"quote": "0x2",
"fee": {
"gas_fee": {
"r0": {
"low": "2000000000000000000",
"high": "0"
},
"r1": {
"low": "3000000000000000000",
"high": "0"
},
"fee_token": "0x3",
"gas_per_action": "21000",
"max_gas_price": {
"low": "C097CE7BC90715B34B9F1000000000",
"high": "0"
}
},
"router_fee": {
"recipient": "0x1111111111111111",
"maker_pbips": "100",
"taker_pbips": "150",
"apply_to_receipt_amount": true
},
"trade_fee": {
"recipient": "0x2222222222222222",
"maker_pbips": "50",
"taker_pbips": "75",
"apply_to_receipt_amount": false
}
},
"constraints": {
"created_at": "1617171717",
"duration_valid": "3600",
"min_receive_amount": {
"low": "1000000000000000000000000",
"high": "0"
},
"nonce": "42",
"number_of_swaps_allowed": "10",
"router_signer": "0xABCDEF1234567890",
"stp": "3"
},
"flags": {
"best_level_only": true,
"external_funds": false,
"full_fill_only": true,
"is_market_order": false,
"is_sell_side": true,
"post_only": true,
"to_ecosystem_book": false
},
"exchange": "0x5",
"salt": "42",
"source": "LayerAkira",
"sign_scheme": "ecdsa curve"
}
}
```
Notes:
1) grant_access_to_executor one lifetime interaction for client.
2) whenever snip-9 leveraged client need not to provide signature in 'sign' field.
In case of snip-9 client would need to sign following snip9 depending on revision:
Active revision (v1), example:
```json
{
"domain": {
"name": "Account.execute_from_outside",
"version": "2",
"chainId": "0x...",
"revision": "1"
},
"types": {
"StarknetDomain": [
{
"name": "name",
"type": "shortstring"
},
{
"name": "version",
"type": "shortstring"
},
{
"name": "chainId",
"type": "shortstring"
},
{
"name": "revision",
"type": "shortstring"
}
],
"OutsideExecution": [
{
"name": "Caller",
"type": "ContractAddress"
},
{
"name": "Nonce",
"type": "felt"
},
{
"name": "Execute After",
"type": "u128"
},
{
"name": "Execute Before",
"type": "u128"
},
{
"name": "Calls",
"type": "Call*"
}
],
"Call": [
{
"name": "To",
"type": "ContractAddress"
},
{
"name": "Selector",
"type": "selector"
},
{
"name": "Calldata",
"type": "felt*"
}
]
},
"primaryType": "OutsideExecution",
"message": {
"Caller": "0xdeadbeef",
"Nonce": "0x1e240",
"Execute After": 1000,
"Execute Before": 2000,
"Calls": [
{
"To": "0x100",
"Selector": "0xabc",
"Calldata": [
"0x1",
"0x2",
"0x3"
]
},
{
"To": "0x200",
"Selector": "0xdef",
"Calldata": [
"0x4",
"0x5"
]
}
]
}
}
```
Legacy revision (v0), example:
```json
{
"domain": {
"name": "Account.execute_from_outside",
"version": "1",
"chainId": "0x..."
},
"types": {
"StarkNetDomain": [
{
"name": "name",
"type": "felt"
},
{
"name": "version",
"type": "felt"
},
{
"name": "chainId",
"type": "felt"
}
],
"OutsideExecution": [
{
"name": "caller",
"type": "felt"
},
{
"name": "nonce",
"type": "felt"
},
{
"name": "execute_after",
"type": "felt"
},
{
"name": "execute_before",
"type": "felt"
},
{
"name": "calls_len",
"type": "felt"
},
{
"name": "calls",
"type": "OutsideCall*"
}
],
"OutsideCall": [
{
"name": "to",
"type": "felt"
},
{
"name": "selector",
"type": "felt"
},
{
"name": "calldata_len",
"type": "felt"
},
{
"name": "calldata",
"type": "felt*"
}
]
},