pvf-precheck: hook up runtime API (#4542)

This commit hooks up the API provided by #4457 to the runtime API
subsystem. In a following PR this API will be consumed by the PVF
pre-checking subsystem.

Co-authored-by: Chris Sosnin <chris125_@live.com>

Co-authored-by: Chris Sosnin <chris125_@live.com>

polkadot/primitives/src/v1/mod.rs

@@ -986,6 +986,7 @@ impl ApprovalVote {
 
 sp_api::decl_runtime_apis! {
 	/// The API for querying the state of parachains on-chain.
+	#[api_version(2)]
 	pub trait ParachainHost<H: Encode + Decode = Hash, N: Encode + Decode = BlockNumber> {
 		/// Get the current validators.
 		fn validators() -> Vec<ValidatorId>;
@@ -1054,6 +1055,12 @@ sp_api::decl_runtime_apis! {
 
 		/// Scrape dispute relevant from on-chain, backing votes and resolved disputes.
 		fn on_chain_votes() -> Option<ScrapedOnChainVotes<H>>;
+
+		/// Submits a PVF pre-checking statement into the transaction pool.
+		fn submit_pvf_check_statement(stmt: PvfCheckStatement, signature: ValidatorSignature);
+
+		/// Returns code hashes of PVFs that require pre-checking by validators in the active set.
+		fn pvfs_require_precheck() -> Vec<ValidationCodeHash>;
 	}
 }