Custom RPC methods for DummyOrdered pallet (paritytech#317)

* RPC for DummyOrdered

* add test for RPC

* proof returned by RPC is Vec<<Vec<u8>>>.encode()

* retrieval -> receiving

* bp-runtime crate

* bp-runtime supports no_std

* cargo fmt --all

* jsonrpc_core::BoxFuture

* Update modules/message-lane/rpc/Cargo.toml

Co-authored-by: Hernando Castano <[email protected]>

* Update modules/message-lane/rpc/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

* messageLane_ prefix for RPC methods

* Update primitives/runtime/Cargo.toml

Co-authored-by: Hernando Castano <[email protected]>

* Update primitives/runtime/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

* Update modules/message-lane/rpc/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

* Update modules/message-lane/rpc/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

* Update modules/message-lane/rpc/src/lib.rs

Co-authored-by: Hernando Castano <[email protected]>

Co-authored-by: Hernando Castano <[email protected]>

bridges/bin/node/node/Cargo.toml

@@ -16,6 +16,7 @@ bp-eth-poa = { version = "0.1.0", path = "../../../primitives/ethereum-poa" }
 futures = "0.3.5"
 jsonrpc-core = "14.2.0"
 log = "0.4.11"
+pallet-message-lane-rpc = { version = "0.1.0", path = "../../../modules/message-lane/rpc" }
 structopt = "0.3.17"
 
 [dependencies.bridge-node-runtime]

bridges/modules/message-lane/rpc/Cargo.toml

@@ -0,0 +1,56 @@
+[package]
+name = "pallet-message-lane-rpc"
+description = "Module that provides RPC methods specific to message-lane pallet."
+version = "0.1.0"
+authors = ["Parity Technologies <[email protected]>"]
+edition = "2018"
+license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+
+[dependencies]
+bp-runtime = { path = "../../../primitives/runtime" }
+bp-message-lane = { path = "../../../primitives/message-lane" }
+derive_more = "0.99.2"
+futures = { version = "0.3.5", features = ["compat"] }
+jsonrpc-core = "14.2.0"
+jsonrpc-core-client = "14.2.0"
+jsonrpc-derive = "14.2.1"
+
+# Substrate Based Dependencies
+
+[dependencies.sc-client-api]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-blockchain]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-core]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-runtime]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-state-machine]
+version = "0.8.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-trie]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"
+
+[dev-dependencies]
+async-std = "1.6.2"
+
+[dev-dependencies.substrate-test-runtime-client]
+version = "2.0.0-rc6"
+tag = 'v2.0.0-rc6'
+git = "https://github.com/paritytech/substrate/"

bridges/modules/message-lane/rpc/src/error.rs

@@ -0,0 +1,59 @@
+// Copyright 2019-2020 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
+// Parity Bridges Common 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.
+
+// Parity Bridges Common 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.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Possible errors and results of message-lane RPC calls.
+
+/// Future Result type.
+pub type FutureResult<T> = jsonrpc_core::BoxFuture<T>;
+
+/// State RPC errors.
+#[derive(Debug, derive_more::Display, derive_more::From)]
+pub enum Error {
+	/// When unknown instance id is passed.
+	#[display(fmt = "Message lane instance is unknown")]
+	UnknownInstance,
+	/// Client error.
+	#[display(fmt = "Client error: {}", _0)]
+	Client(Box<dyn std::error::Error + Send>),
+}
+
+impl std::error::Error for Error {
+	fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+		match self {
+			Error::UnknownInstance => None,
+			Error::Client(ref err) => Some(&**err),
+		}
+	}
+}
+
+impl From<Error> for jsonrpc_core::Error {
+	fn from(e: Error) -> Self {
+		const UNKNOW_INSTANCE_CODE: i64 = 1;
+
+		match e {
+			Error::UnknownInstance => jsonrpc_core::Error {
+				code: jsonrpc_core::ErrorCode::ServerError(UNKNOW_INSTANCE_CODE),
+				message: "Unknown instance passed".into(),
+				data: None,
+			},
+			Error::Client(e) => jsonrpc_core::Error {
+				code: jsonrpc_core::ErrorCode::InternalError,
+				message: format!("Unknown error occured: {}", e),
+				data: Some(format!("{:?}", e).into()),
+			},
+		}
+	}
+}