Move substrate-bridge-relay into repository (#1)

* Initial commit. CLI which parses RPC urls.

* Establish ws connections and make simple RPC requests.

* Complete bridge setup.

* Process subscription events.

* Ctrl-C handler.

* Write a bare-bones README and copy in design doc.

* Modularize code a little bit.

* Communicate with each chain in a separate task.

* Parse headers from RPC subscription notifications.

* Send (fake) extrinsics across bridge channels.

And now it's deadlocked.

* Fix deadlock.

* Clarify in README that this is not-in-progress.

* Move everything into a single folder

* Move Substrate relay into appropriate folder

* Get the Substrate Relay node compiling

* Update Cargo.lock

* Use new composite accounts from Substrate

* Remove specification document

It has been moved to the Wiki on the Github repo.

* Update author + remove comments

* Use latest master for jsonrpsee

Required renaming some stuff (e.g Client -> RawClient)

Co-authored-by: Jim Posen <jim.posen@gmail.com>

bridges/modules/substrate/src/lib.rs

@@ -247,6 +247,9 @@ mod tests {
 		type MaximumBlockLength = ();
 		type Version = ();
 		type ModuleToIndex = ();
+		type AccountData = ();
+		type OnNewAccount = ();
+		type OnReapAccount = ();
 	}
 
 	impl Trait for Test {}

bridges/relays/substrate/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "substrate-bridge"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
+
+[dependencies]
+async-std = "1.0.1"
+clap = "2.3.3"
+ctrlc = "3.1.3"
+derive_more = "0.99.1"
+env_logger = "0.7.1"
+futures = "0.3.1"
+jsonrpsee = { git = "https://github.com/paritytech/jsonrpsee", features = ["ws"] }
+log = "0.4.8"
+node-primitives = { version = "2.0.0", git = "https://github.com/paritytech/substrate" }
+serde_json = "1.0.41"
+sp-core = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git" }
+sp-rpc = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git" }
+url = "2.1.0"

bridges/relays/substrate/README.md

@@ -0,0 +1,32 @@
+# Substrate-to-Substrate Bridge Relay
+
+The bridge relay is a process that connects to running Substrate nodes and sends data over the Substrate-to-Substrate bridge. The process communicates with the nodes over the JSON-RPC interface and reads data from the relays information required by the `bridge` pallet using runtime calls and writes data to the modules by constructing and submitting extrinsics.
+
+For more details, see the [design document](doc/design.md).
+
+## Status
+
+This is a not-in-progress prototype.
+
+## Running in development
+
+Run two development Substrate chains:
+
+```bash
+> TMPDIR=(mktemp -d)
+> cd $TMPDIR
+> substrate build-spec --dev > red-spec.json
+> cp red-spec.json blue-spec.json
+# Modify the chain spec in an editor so that the genesis hashes of the two chains differ.
+# For example, double one of the balances in '$.genesis.runtime.balances.balances'.
+> substrate --chain red-spec.json --alice --base-path ./red --port 30343 --ws-port 9954
+> substrate --chain blue-spec.json --alice --base-path ./blue --port 30353 --ws-port 9964
+```
+
+Now run the bridge relay:
+
+```
+> target/release/substrate-bridge --base-path ./relay \
+    --rpc-url ws://localhost:9954 \
+    --rpc-url ws://localhost:9964
+```