removes use of sc_client::Client from sc-rpc

bin/node-template/node/Cargo.toml

@@ -30,6 +30,7 @@ sp-consensus = { version = "0.8.0-alpha.2", path = "../../../primitives/consensu
 grandpa = { version = "0.8.0-alpha.2", package = "sc-finality-grandpa", path = "../../../client/finality-grandpa" }
 grandpa-primitives = { version = "2.0.0-alpha.2", package = "sp-finality-grandpa", path = "../../../primitives/finality-grandpa" }
 sc-client = { version = "0.8.0-alpha.2", path = "../../../client/" }
+sc-client-api = { version = "2.0.0-alpha.2", path = "../../../client/api" }
 sp-runtime = { version = "2.0.0-alpha.2", path = "../../../primitives/runtime" }
 sc-basic-authorship = { path = "../../../client/basic-authorship" , version = "0.8.0-alpha.2"}
 

bin/node-template/node/src/service.rs

@@ -3,13 +3,14 @@
 use std::sync::Arc;
 use std::time::Duration;
 use sc_client::LongestChain;
+use sc_client_api::ExecutorProvider;
 use node_template_runtime::{self, GenesisConfig, opaque::Block, RuntimeApi};
 use sc_service::{error::{Error as ServiceError}, AbstractService, Configuration, ServiceBuilder};
 use sp_inherents::InherentDataProviders;
 use sc_executor::native_executor_instance;
 pub use sc_executor::NativeExecutor;
 use sp_consensus_aura::sr25519::{AuthorityPair as AuraPair};
-use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
+use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider, StorageAndProofProvider};
 
 // Our native executor instance.
 native_executor_instance!(
@@ -24,6 +25,7 @@ native_executor_instance!(
 /// be able to perform chain operations.
 macro_rules! new_full_start {
 	($config:expr) => {{
+		use std::sync::Arc;
 		let mut import_setup = None;
 		let inherent_data_providers = sp_inherents::InherentDataProviders::new();
 
@@ -42,7 +44,7 @@ macro_rules! new_full_start {
 					.ok_or_else(|| sc_service::Error::SelectChainRequired)?;
 
 				let (grandpa_block_import, grandpa_link) =
-					grandpa::block_import(client.clone(), &*client, select_chain)?;
+					grandpa::block_import(client.clone(), &(client.clone() as Arc<_>), select_chain)?;
 
 				let aura_block_import = sc_consensus_aura::AuraBlockImport::<_, _, _, AuraPair>::new(
 					grandpa_block_import.clone(), client.clone(),
@@ -87,9 +89,11 @@ pub fn new_full(config: Configuration<GenesisConfig>)
 			.expect("Link Half and Block Import are present for Full Services or setup failed before. qed");
 
 	let service = builder
-		.with_finality_proof_provider(|client, backend|
-			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, client)) as _)
-		)?
+		.with_finality_proof_provider(|client, backend| {
+			// GenesisAuthoritySetProvider is implemented for StorageAndProofProvider
+			let provider = client as Arc<dyn StorageAndProofProvider<_, _>>;
+			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, provider)) as _)
+		})?
 		.build()?;
 
 	if participates_in_consensus {
@@ -201,7 +205,10 @@ pub fn new_light(config: Configuration<GenesisConfig>)
 				.map(|fetcher| fetcher.checker().clone())
 				.ok_or_else(|| "Trying to start light import queue without active fetch checker")?;
 			let grandpa_block_import = grandpa::light_block_import(
-				client.clone(), backend, &*client.clone(), Arc::new(fetch_checker),
+				client.clone(),
+				backend,
+				&(client.clone() as Arc<_>),
+				Arc::new(fetch_checker),
 			)?;
 			let finality_proof_import = grandpa_block_import.clone();
 			let finality_proof_request_builder =
@@ -218,8 +225,10 @@ pub fn new_light(config: Configuration<GenesisConfig>)
 
 			Ok((import_queue, finality_proof_request_builder))
 		})?
-		.with_finality_proof_provider(|client, backend|
-			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, client)) as _)
-		)?
+		.with_finality_proof_provider(|client, backend| {
+			// GenesisAuthoritySetProvider is implemented for StorageAndProofProvider
+			let provider = client as Arc<dyn StorageAndProofProvider<_, _>>;
+			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, provider)) as _)
+		})?
 		.build()
 }

bin/node/cli/src/service.rs

@@ -22,7 +22,7 @@ use std::sync::Arc;
 
 use sc_consensus_babe;
 use sc_client::{self, LongestChain};
-use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
+use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider, StorageAndProofProvider};
 use node_executor;
 use node_primitives::Block;
 use node_runtime::{GenesisConfig, RuntimeApi};
@@ -45,6 +45,7 @@ use sc_offchain::OffchainWorkers;
 /// be able to perform chain operations.
 macro_rules! new_full_start {
 	($config:expr) => {{
+		use std::sync::Arc;
 		type RpcExtension = jsonrpc_core::IoHandler<sc_rpc::Metadata>;
 		let mut import_setup = None;
 		let inherent_data_providers = sp_inherents::InherentDataProviders::new();
@@ -64,7 +65,7 @@ macro_rules! new_full_start {
 					.ok_or_else(|| sc_service::Error::SelectChainRequired)?;
 				let (grandpa_block_import, grandpa_link) = grandpa::block_import(
 					client.clone(),
-					&*client,
+					&(client.clone() as Arc<_>),
 					select_chain,
 				)?;
 				let justification_import = grandpa_block_import.clone();
@@ -116,6 +117,7 @@ macro_rules! new_full {
 	($config:expr, $with_startup_data: expr) => {{
 		use futures::prelude::*;
 		use sc_network::Event;
+		use sc_client_api::ExecutorProvider;
 
 		let (
 			is_authority,
@@ -139,9 +141,11 @@ macro_rules! new_full {
 		let (builder, mut import_setup, inherent_data_providers) = new_full_start!($config);
 
 		let service = builder
-			.with_finality_proof_provider(|client, backend|
-				Ok(Arc::new(grandpa::FinalityProofProvider::new(backend, client)) as _)
-			)?
+			.with_finality_proof_provider(|client, backend| {
+				// GenesisAuthoritySetProvider is implemented for StorageAndProofProvider
+				let provider = client as Arc<dyn grandpa::StorageAndProofProvider<_, _>>;
+				Ok(Arc::new(grandpa::FinalityProofProvider::new(backend, provider)) as _)
+			})?
 			.build()?;
 
 		let (block_import, grandpa_link, babe_link) = import_setup.take()
@@ -255,8 +259,7 @@ type ConcreteBlock = node_primitives::Block;
 type ConcreteClient =
 	Client<
 		Backend<ConcreteBlock>,
-		LocalCallExecutor<Backend<ConcreteBlock>,
-		NativeExecutor<node_executor::Executor>>,
+		LocalCallExecutor<Backend<ConcreteBlock>, NativeExecutor<node_executor::Executor>>,
 		ConcreteBlock,
 		node_runtime::RuntimeApi
 	>;
@@ -317,7 +320,7 @@ pub fn new_light(config: NodeConfiguration)
 			let grandpa_block_import = grandpa::light_block_import(
 				client.clone(),
 				backend,
-				&*client,
+				&(client.clone() as Arc<_>),
 				Arc::new(fetch_checker),
 			)?;
 
@@ -342,9 +345,11 @@ pub fn new_light(config: NodeConfiguration)
 
 			Ok((import_queue, finality_proof_request_builder))
 		})?
-		.with_finality_proof_provider(|client, backend|
-			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, client)) as _)
-		)?
+		.with_finality_proof_provider(|client, backend| {
+			// GenesisAuthoritySetProvider is implemented for StorageAndProofProvider
+			let provider = client as Arc<dyn StorageAndProofProvider<_, _>>;
+			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, provider)) as _)
+		})?
 		.with_rpc_extensions(|builder,| ->
 			Result<RpcExtension, _>
 		{

client/api/Cargo.toml

@@ -34,6 +34,7 @@ sp-runtime = { version = "2.0.0-alpha.2", default-features = false, path = "../.
 sp-state-machine = { version = "0.8.0-alpha.2", path = "../../primitives/state-machine" }
 sc-telemetry = { version = "2.0.0-alpha.2", path = "../telemetry" }
 sp-trie = { version = "2.0.0-alpha.2", path = "../../primitives/trie" }
+sp-storage = { version = "2.0.0-alpha.2", path = "../../primitives/storage" }
 sp-transaction-pool = { version = "2.0.0-alpha.2", path = "../../primitives/transaction-pool" }
 
 [dev-dependencies]

client/api/src/backend.rs

@@ -26,6 +26,7 @@ use sp_state_machine::{
 	ChangesTrieState, ChangesTrieStorage as StateChangesTrieStorage, ChangesTrieTransaction,
 	StorageCollection, ChildStorageCollection,
 };
+use sp_storage::{StorageData, StorageKey, ChildInfo};
 use crate::{
 	blockchain::{
 		Backend as BlockchainBackend, well_known_cache_keys
@@ -38,6 +39,7 @@ use sp_consensus::BlockOrigin;
 use parking_lot::RwLock;
 
 pub use sp_state_machine::Backend as StateBackend;
+use std::marker::PhantomData;
 
 /// Extracts the state backend type for the given backend.
 pub type StateBackendFor<B, Block> = <B as Backend<Block>>::State;
@@ -237,6 +239,123 @@ pub trait AuxStore {
 	fn get_aux(&self, key: &[u8]) -> sp_blockchain::Result<Option<Vec<u8>>>;
 }
 
+/// An `Iterator` that iterates keys in a given block under a prefix.
+pub struct KeyIterator<'a, State, Block> {
+	state: State,
+	prefix: Option<&'a StorageKey>,
+	current_key: Vec<u8>,
+	_phantom: PhantomData<Block>,
+}
+
+impl <'a, State, Block> KeyIterator<'a, State, Block> {
+	/// create a KeyIterator instance
+	pub fn new(state: State, prefix: Option<&'a StorageKey>, current_key: Vec<u8>) -> Self {
+		Self {
+			state,
+			prefix,
+			current_key,
+			_phantom: PhantomData,
+		}
+	}
+}
+
+impl<'a, State, Block> Iterator for KeyIterator<'a, State, Block> where
+	Block: BlockT,
+	State: StateBackend<HashFor<Block>>,
+{
+	type Item = StorageKey;
+
+	fn next(&mut self) -> Option<Self::Item> {
+		let next_key = self.state
+			.next_storage_key(&self.current_key)
+			.ok()
+			.flatten()?;
+		// this terminates the iterator the first time it fails.
+		if let Some(prefix) = self.prefix {
+			if !next_key.starts_with(&prefix.0[..]) {
+				return None;
+			}
+		}
+		self.current_key = next_key.clone();
+		Some(StorageKey(next_key))
+	}
+}
+/// Provides acess to storage primitives
+pub trait StorageProvider<Block: BlockT, B: Backend<Block>> {
+	/// Given a `BlockId` and a key, return the value under the key in that block.
+	fn storage(&self, id: &BlockId<Block>, key: &StorageKey) -> sp_blockchain::Result<Option<StorageData>>;
+
+	/// Given a `BlockId` and a key prefix, return the matching storage keys in that block.
+	fn storage_keys(&self, id: &BlockId<Block>, key_prefix: &StorageKey) -> sp_blockchain::Result<Vec<StorageKey>>;
+
+	/// Given a `BlockId` and a key, return the value under the hash in that block.
+	fn storage_hash(&self, id: &BlockId<Block>, key: &StorageKey) -> sp_blockchain::Result<Option<Block::Hash>>;
+
+	/// Given a `BlockId` and a key prefix, return the matching child storage keys and values in that block.
+	fn storage_pairs(
+		&self,
+		id: &BlockId<Block>,
+		key_prefix: &StorageKey
+	) -> sp_blockchain::Result<Vec<(StorageKey, StorageData)>>;
+
+	/// Given a `BlockId` and a key prefix, return a `KeyIterator` iterates matching storage keys in that block.
+	fn storage_keys_iter<'a>(
+		&self,
+		id: &BlockId<Block>,
+		prefix: Option<&'a StorageKey>,
+		start_key: Option<&StorageKey>
+	) -> sp_blockchain::Result<KeyIterator<'a, B::State, Block>>;
+
+	/// Given a `BlockId`, a key and a child storage key, return the value under the key in that block.
+	fn child_storage(
+		&self,
+		id: &BlockId<Block>,
+		storage_key: &StorageKey,
+		child_info: ChildInfo,
+		key: &StorageKey
+	) -> sp_blockchain::Result<Option<StorageData>>;
+
+	/// Given a `BlockId`, a key prefix, and a child storage key, return the matching child storage keys.
+	fn child_storage_keys(
+		&self,
+		id: &BlockId<Block>,
+		child_storage_key: &StorageKey,
+		child_info: ChildInfo,
+		key_prefix: &StorageKey
+	) -> sp_blockchain::Result<Vec<StorageKey>>;
+
+	/// Given a `BlockId`, a key and a child storage key, return the hash under the key in that block.
+	fn child_storage_hash(
+		&self,
+		id: &BlockId<Block>,
+		storage_key: &StorageKey,
+		child_info: ChildInfo,
+		key: &StorageKey
+	) -> sp_blockchain::Result<Option<Block::Hash>>;
+
+	/// Get longest range within [first; last] that is possible to use in `key_changes`
+	/// and `key_changes_proof` calls.
+	/// Range could be shortened from the beginning if some changes tries have been pruned.
+	/// Returns Ok(None) if changes tries are not supported.
+	fn max_key_changes_range(
+		&self,
+		first: NumberFor<Block>,
+		last: BlockId<Block>,
+	) -> sp_blockchain::Result<Option<(NumberFor<Block>, BlockId<Block>)>>;
+
+	/// Get pairs of (block, extrinsic) where key has been changed at given blocks range.
+	/// Works only for runtimes that are supporting changes tries.
+	///
+	/// Changes are returned in descending order (i.e. last block comes first).
+	fn key_changes(
+		&self,
+		first: NumberFor<Block>,
+		last: BlockId<Block>,
+		storage_key: Option<&StorageKey>,
+		key: &StorageKey
+	) -> sp_blockchain::Result<Vec<(NumberFor<Block>, u32)>>;
+}
+
 /// Client backend.
 ///
 /// Manages the data layer.

client/api/src/call_executor.rs

@@ -29,6 +29,18 @@ use sp_externalities::Extensions;
 use sp_core::NativeOrEncoded;
 
 use sp_api::{ProofRecorder, InitializeBlock, StorageTransactionCache};
+use crate::execution_extensions::ExecutionExtensions;
+
+/// Executor Provider
+pub trait ExecutorProvider<Block: BlockT> {
+	/// executor instance
+	type Executor: CallExecutor<Block>;
+	/// Get call executor reference.
+	fn executor(&self) -> &Self::Executor;
+
+	/// Get a reference to the execution extensions.
+	fn execution_extensions(&self) -> &ExecutionExtensions<Block>;
+}
 
 /// Method call executor.
 pub trait CallExecutor<B: BlockT> {

client/api/src/client.rs

@@ -21,7 +21,7 @@ use futures::channel::mpsc;
 use sp_core::storage::StorageKey;
 use sp_runtime::{
 	traits::{Block as BlockT, NumberFor},
-	generic::BlockId
+	generic::{BlockId, SignedBlock}
 };
 use sp_consensus::BlockOrigin;
 
@@ -76,9 +76,13 @@ pub trait BlockchainEvents<Block: BlockT> {
 /// Fetch block body by ID.
 pub trait BlockBody<Block: BlockT> {
 	/// Get block body by ID. Returns `None` if the body is not stored.
-	fn block_body(&self,
+	fn block_body(
+		&self,
 		id: &BlockId<Block>
 	) -> sp_blockchain::Result<Option<Vec<<Block as BlockT>::Extrinsic>>>;
+
+	/// Get full block by id.
+	fn block(&self, id: &BlockId<Block>) -> sp_blockchain::Result<Option<SignedBlock<Block>>>;
 }
 
 /// Provide a list of potential uncle headers for a given block.

client/api/src/lib.rs

@@ -23,6 +23,7 @@ pub mod client;
 pub mod execution_extensions;
 pub mod light;
 pub mod notifications;
+pub mod proof_provider;
 
 pub use sp_blockchain as blockchain;
 pub use backend::*;
@@ -31,6 +32,7 @@ pub use call_executor::*;
 pub use client::*;
 pub use light::*;
 pub use notifications::*;
+pub use proof_provider::*;
 
 pub use sp_state_machine::{StorageProof, ExecutionStrategy};