Add canvas-kusama runtime (#980)

* Added kanvas runtime

* Fix up benchmarking

* Fixup markdown stucture

* replace :emoji_name: by utf8
* fix up header hierarchy

* Merge canvas README

* Only use "Canvas" as a name

* Remove reference to Rocanvas

cumulus/polkadot-parachains/src/rpc.rs

@@ -20,6 +20,8 @@
 
 use std::sync::Arc;
 
+use pallet_contracts_rpc::{Contracts, ContractsApi};
+use parachains_common::{AccountId, Balance, Block, BlockNumber, Hash, Index as Nonce};
 use sc_client_api::AuxStore;
 pub use sc_rpc::{DenyUnsafe, SubscriptionTaskExecutor};
 use sc_transaction_pool_api::TransactionPool;
@@ -27,8 +29,6 @@ use sp_api::ProvideRuntimeApi;
 use sp_block_builder::BlockBuilder;
 use sp_blockchain::{Error as BlockChainError, HeaderBackend, HeaderMetadata};
 
-use parachains_common::{AccountId, Balance, Block, Index as Nonce};
-
 /// A type representing all RPC extensions.
 pub type RpcExtension = jsonrpc_core::IoHandler<sc_rpc::Metadata>;
 
@@ -68,3 +68,32 @@ where
 
 	io
 }
+
+/// Instantiate all RPCs we want at the canvas-kusama chain.
+pub fn create_canvas_kusama<C, P>(deps: FullDeps<C, P>) -> RpcExtension
+where
+	C: ProvideRuntimeApi<Block>
+		+ HeaderBackend<Block>
+		+ AuxStore
+		+ HeaderMetadata<Block, Error = BlockChainError>
+		+ Send
+		+ Sync
+		+ 'static,
+	C::Api: frame_rpc_system::AccountNonceApi<Block, AccountId, Nonce>,
+	C::Api: pallet_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, Balance>,
+	C::Api: pallet_contracts_rpc::ContractsRuntimeApi<Block, AccountId, Balance, BlockNumber, Hash>,
+	C::Api: BlockBuilder<Block>,
+	P: TransactionPool + Sync + Send + 'static,
+{
+	use frame_rpc_system::{FullSystem, SystemApi};
+	use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApi};
+
+	let mut io = jsonrpc_core::IoHandler::default();
+	let FullDeps { client, pool, deny_unsafe } = deps;
+
+	io.extend_with(SystemApi::to_delegate(FullSystem::new(client.clone(), pool, deny_unsafe)));
+	io.extend_with(TransactionPaymentApi::to_delegate(TransactionPayment::new(client.clone())));
+	io.extend_with(ContractsApi::to_delegate(Contracts::new(client)));
+
+	io
+}