Introduce rpc client for relay chain full node (#963)

* Initial network interface preparations

* Implement get_storage_by_key

* Implement `validators` and `session_index_for_child`

* Implement persisted_validation_data and candidate_pending_availability

* Fix method name for persisted_validation_data and add encoded params

* Implement `retrieve_dmq_contents` and `retrieve_all_inbound_hrmp_channel_contents`

* Implement `prove_read`

* Introduce separate RPC client, expose JsonRpSee errors

* Simplify closure in call_remote_runtime_function

* Implement import stream, upgrade JsonRpSee

* Implement finality stream

* Remove unused method from interface

* Implement `is_major_syncing`

* Implement `wait_on_block`

* Fix tests

* Unify error handling `ApiError`

* Replace WaitError with RelayChainError

* Wrap BlockChainError in RelayChainError

* Unify error handling in relay chain intefaces

* Fix return type of proof method

* Improve error handling of new methods

* Improve error handling and move logging outside of interface

* Clean up

* Remove unwanted changes, clean up

* Remove unused import

* Add format for StatemachineError and remove nused From trait

* Use 'thiserror' crate to simplify error handling

* Expose error for overseer, further simplify error handling

* Reintroduce network interface

* Implement cli option

* Adjust call_state method to use hashes

* Disable PoV recovery when RPC is used

* Add integration test for network full node

* Use Hash instead of BlockId to ensure compatibility with RPC interface

* Fix cargo check warnings

* Implement retries

* Remove `expect` statements from code

* Update jsonrpsee to 0.8.0 and make collator keys optional

* Make cli arguments conflicting

* Remove unused `block_status` method

* Add clippy fixes

* Cargo fmt

* Validate relay chain rpc url

* Clean up dependencies and add one more integration test

* Clean up

* Clean up dependencies of relay-chain-network

* Use hash instead of blockid for rpc methods

* Fix tests

* Update client/cli/src/lib.rs

Co-authored-by: Koute <koute@users.noreply.github.com>

* Improve error message of cli validation

* Add rpc client constructor

* Do not use debug formatting for errors

* Improve logging for remote runtime methods

* Only retry on transport problems

* Use PHash by value, rename test

* Improve tracing, return error  on relay-chain-interface build

* Fix naming, use generics instead of deserializing manually

* Rename RelayChainLocal and RelayChainNetwork

* lock

* Format

* Use impl trait for encodable runtime payload

* Only instantiate full node in tests when we need it

* Upgrade scale-codec to 3.0.0

* Improve expect log

Co-authored-by: Koute <koute@users.noreply.github.com>

client/service/src/lib.rs

@@ -18,6 +18,7 @@
 //!
 //! Provides functions for starting a collator node or a normal full node.
 
+use cumulus_client_cli::CollatorOptions;
 use cumulus_client_consensus_common::ParachainConsensus;
 use cumulus_primitives_core::{CollectCollationInfo, ParaId};
 use cumulus_relay_chain_interface::RelayChainInterface;
@@ -151,6 +152,7 @@ pub struct StartFullNodeParams<'a, Block: BlockT, Client, RCInterface, IQ> {
 	pub announce_block: Arc<dyn Fn(Block::Hash, Option<Vec<u8>>) + Send + Sync>,
 	pub relay_chain_slot_duration: Duration,
 	pub import_queue: IQ,
+	pub collator_options: CollatorOptions,
 }
 
 /// Start a full node for a parachain.
@@ -166,6 +168,7 @@ pub fn start_full_node<Block, Client, Backend, RCInterface, IQ>(
 		para_id,
 		relay_chain_slot_duration,
 		import_queue,
+		collator_options,
 	}: StartFullNodeParams<Block, Client, RCInterface, IQ>,
 ) -> sc_service::error::Result<()>
 where
@@ -193,6 +196,14 @@ where
 		.spawn_essential_handle()
 		.spawn("cumulus-consensus", None, consensus);
 
+	// PoV Recovery is currently not supported when we connect to the
+	// relay chain via RPC, so we return early. The node will work, but not be able to recover PoVs from the
+	// relay chain if blocks are not announced on parachain. This will be enabled again once
+	// https://github.com/paritytech/cumulus/issues/545 is finished.
+	if collator_options.relay_chain_rpc_url.is_some() {
+		return Ok(())
+	}
+
 	let overseer_handle = relay_chain_interface
 		.overseer_handle()
 		.map_err(|e| sc_service::Error::Application(Box::new(e)))?