Use substrate metadata, introduce builder for client (paritytech#4)

* Export Error type

* Fix license headers

* Remove unnecessary fully qualified associated types

* Update to parity-scale-codec, handles decoding errors

* rustfmt

* Add metadata.

* Use metadata for calls.

* Refactor generics.

* Storage metadata.

* Use builders.

* Finish making generic.

* Fix merge.

* Run rustfmt.

* Fix merge.

Cargo.toml

@@ -18,7 +18,8 @@ log = "0.4"
 futures = "0.1.28"
 jsonrpc-core-client = { version = "12.1.0", features = ["ws"] }
 num-traits = { version = "0.2", default-features = false }
-parity-codec = { version = "4.1", default-features = false, features = ["derive", "full"] }
+parity-scale-codec = { version = "1.0", default-features = false, features = ["derive", "full"] }
+runtime_metadata = { git = "https://github.com/paritytech/substrate/", package = "srml-metadata" }
 runtime_support = { git = "https://github.com/paritytech/substrate/", package = "srml-support" }
 runtime_primitives = { git = "https://github.com/paritytech/substrate/", package = "sr-primitives" }
 serde = { version = "1.0", features = ["derive"] }
@@ -30,7 +31,7 @@ url = "1.7"
 
 [dev-dependencies]
 env_logger = "0.6"
-node_runtime = { git = "https://github.com/paritytech/substrate/", package = "node-runtime" }
-srml_balances = { git = "https://github.com/paritytech/substrate/", package = "srml-balances" }
+node-runtime = { git = "https://github.com/paritytech/substrate/", package = "node-runtime" }
+srml-balances = { git = "https://github.com/paritytech/substrate/", package = "srml-balances" }
 substrate-keyring = { git = "https://github.com/paritytech/substrate/", package = "substrate-keyring" }
 tokio = "0.1"

README.md

@@ -1,4 +1,4 @@
-# subxt 
+# subxt
 
 A library to **sub**mit e**xt**rinsics to a [substrate](https://github.com/paritytech/substrate) node via RPC.
 
@@ -7,4 +7,3 @@ A library to **sub**mit e**xt**rinsics to a [substrate](https://github.com/parit
 ## License
 
 The entire code within this repository is licensed under the [GPLv3](LICENSE). Please [contact us](https://www.parity.io/contact/) if you have questions about the licensing of our products.
- of our products.

src/error.rs

@@ -1,12 +1,12 @@
-// Copyright 2018-2019 Parity Technologies (UK) Ltd.
+// Copyright 2019 Parity Technologies (UK) Ltd.
 // This file is part of substrate-subxt.
 //
-// ink! is free software: you can redistribute it and/or modify
+// subxt is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // (at your option) any later version.
 //
-// ink! is distributed in the hope that it will be useful,
+// subxt is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.
@@ -15,11 +15,13 @@
 // along with substrate-subxt.  If not, see <http://www.gnu.org/licenses/>.
 
 use jsonrpc_core_client::RpcError;
+use parity_scale_codec::Error as CodecError;
 use std::io::Error as IoError;
 use substrate_primitives::crypto::SecretStringError;
 
 #[derive(Debug, derive_more::From)]
 pub enum Error {
+    Codec(CodecError),
     Io(IoError),
     Rpc(RpcError),
     SecretString(SecretStringError),