MMR: move RPC code from frame/ to client/ (paritytech#12805)

* mmr: move MMR RPC from frame/ to client/

Signed-off-by: Adrian Catangiu <adrian@parity.io>

* client/mmr: adjust logging levels to avoid spam

* cargo fmt

* remove unused imports

Signed-off-by: Adrian Catangiu <adrian@parity.io>

Cargo.toml

@@ -42,6 +42,7 @@ members = [
 	"client/informant",
 	"client/keystore",
 	"client/merkle-mountain-range",
+	"client/merkle-mountain-range/rpc",
 	"client/network",
 	"client/network-gossip",
 	"client/network/bitswap",
@@ -108,7 +109,6 @@ members = [
 	"frame/lottery",
 	"frame/membership",
 	"frame/merkle-mountain-range",
-	"frame/merkle-mountain-range/rpc",
 	"frame/multisig",
 	"frame/nicks",
 	"frame/node-authorization",

bin/node/rpc/Cargo.toml

@@ -14,8 +14,8 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 jsonrpsee = { version = "0.15.1", features = ["server"] }
 node-primitives = { version = "2.0.0", path = "../primitives" }
-pallet-mmr-rpc = { version = "3.0.0", path = "../../../frame/merkle-mountain-range/rpc/" }
 pallet-transaction-payment-rpc = { version = "4.0.0-dev", path = "../../../frame/transaction-payment/rpc/" }
+mmr-rpc = { version = "4.0.0-dev", path = "../../../client/merkle-mountain-range/rpc/" }
 sc-chain-spec = { version = "4.0.0-dev", path = "../../../client/chain-spec" }
 sc-client-api = { version = "4.0.0-dev", path = "../../../client/api" }
 sc-consensus-babe = { version = "0.10.0-dev", path = "../../../client/consensus/babe" }

bin/node/rpc/src/lib.rs

@@ -108,11 +108,7 @@ where
 		+ Send
 		+ 'static,
 	C::Api: substrate_frame_rpc_system::AccountNonceApi<Block, AccountId, Index>,
-	C::Api: pallet_mmr_rpc::MmrRuntimeApi<
-		Block,
-		<Block as sp_runtime::traits::Block>::Hash,
-		BlockNumber,
-	>,
+	C::Api: mmr_rpc::MmrRuntimeApi<Block, <Block as sp_runtime::traits::Block>::Hash, BlockNumber>,
 	C::Api: pallet_transaction_payment_rpc::TransactionPaymentRuntimeApi<Block, Balance>,
 	C::Api: BabeApi<Block>,
 	C::Api: BlockBuilder<Block>,
@@ -121,7 +117,7 @@ where
 	B: sc_client_api::Backend<Block> + Send + Sync + 'static,
 	B::State: sc_client_api::backend::StateBackend<sp_runtime::traits::HashFor<Block>>,
 {
-	use pallet_mmr_rpc::{Mmr, MmrApiServer};
+	use mmr_rpc::{Mmr, MmrApiServer};
 	use pallet_transaction_payment_rpc::{TransactionPayment, TransactionPaymentApiServer};
 	use sc_consensus_babe_rpc::{Babe, BabeApiServer};
 	use sc_finality_grandpa_rpc::{Grandpa, GrandpaApiServer};

frame/merkle-mountain-range/rpc/Cargo.toml → client/merkle-mountain-range/rpc/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
-name = "pallet-mmr-rpc"
-version = "3.0.0"
+name = "mmr-rpc"
+version = "4.0.0-dev"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
 license = "Apache-2.0"

client/merkle-mountain-range/src/lib.rs

@@ -44,7 +44,7 @@ pub mod test_utils;
 use std::{marker::PhantomData, sync::Arc};
 
 use futures::StreamExt;
-use log::{debug, error, trace, warn};
+use log::{error, trace, warn};
 
 use sc_client_api::{Backend, BlockchainEvents, FinalityNotifications};
 use sc_offchain::OffchainDb;
@@ -110,13 +110,16 @@ where
 					}
 				},
 				_ => {
-					trace!(target: LOG_TARGET, "Finality notification: {:?}", notification);
-					debug!(target: LOG_TARGET, "Waiting for MMR pallet to become available ...");
+					trace!(
+						target: LOG_TARGET,
+						"Waiting for MMR pallet to become available... (best finalized {:?})",
+						notification.header.number()
+					);
 				},
 			}
 		}
 
-		warn!(
+		error!(
 			target: LOG_TARGET,
 			"Finality notifications stream closed unexpectedly. \
 			Couldn't build the canonicalization engine",

client/merkle-mountain-range/src/offchain_mmr.rs

@@ -66,7 +66,7 @@ where
 		match self.client.header_metadata(hash) {
 			Ok(header) => Some(header),
 			_ => {
-				error!(
+				debug!(
 					target: LOG_TARGET,
 					"Block {} not found. Couldn't {} associated branch.", hash, action
 				);
@@ -168,7 +168,7 @@ where
 					canon_key
 				);
 			} else {
-				error!(
+				debug!(
 					target: LOG_TARGET,
 					"Couldn't canonicalize elem at pos {} using temp key {:?}", pos, temp_key
 				);

frame/merkle-mountain-range/src/lib.rs

@@ -57,10 +57,17 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use frame_support::{log, weights::Weight};
+use sp_mmr_primitives::utils;
 use sp_runtime::{
 	traits::{self, One, Saturating},
 	SaturatedConversion,
 };
+use sp_std::prelude::*;
+
+pub use pallet::*;
+pub use sp_mmr_primitives::{
+	self as primitives, utils::NodesUtils, Error, LeafDataProvider, LeafIndex, NodeIndex,
+};
 
 #[cfg(feature = "runtime-benchmarks")]
 mod benchmarking;
@@ -71,13 +78,6 @@ mod mock;
 #[cfg(test)]
 mod tests;
 
-pub use pallet::*;
-use sp_mmr_primitives::utils;
-pub use sp_mmr_primitives::{
-	self as primitives, utils::NodesUtils, Error, LeafDataProvider, LeafIndex, NodeIndex,
-};
-use sp_std::prelude::*;
-
 /// The most common use case for MMRs is to store historical block hashes,
 /// so that any point in time in the future we can receive a proof about some past
 /// blocks without using excessive on-chain storage.

frame/merkle-mountain-range/src/mock.rs

@@ -29,7 +29,6 @@ use sp_runtime::{
 	testing::Header,
 	traits::{BlakeTwo256, IdentityLookup, Keccak256},
 };
-use sp_std::prelude::*;
 
 type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;
 type Block = frame_system::mocking::MockBlock<Test>;