diff --git a/Cargo.lock b/Cargo.lock index 944cd153f663..daac5d83443c 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -14640,6 +14640,7 @@ dependencies = [ "sp-statement-store", "sp-storage", "sp-test-primitives", + "sp-trie", "substrate-prometheus-endpoint", "substrate-test-runtime", "thiserror", diff --git a/substrate/client/api/Cargo.toml b/substrate/client/api/Cargo.toml index b59149424ed3..2b64c86038dd 100644 --- a/substrate/client/api/Cargo.toml +++ b/substrate/client/api/Cargo.toml @@ -35,6 +35,7 @@ sp-runtime = { path = "../../primitives/runtime", default-features = false} sp-state-machine = { path = "../../primitives/state-machine" } sp-statement-store = { path = "../../primitives/statement-store" } sp-storage = { path = "../../primitives/storage" } +sp-trie = { path = "../../primitives/trie" } [dev-dependencies] thiserror = "1.0.48" diff --git a/substrate/client/api/src/backend.rs b/substrate/client/api/src/backend.rs index 2d8fdef77cdb..31b100433c70 100644 --- a/substrate/client/api/src/backend.rs +++ b/substrate/client/api/src/backend.rs @@ -33,6 +33,7 @@ use sp_state_machine::{ OffchainChangesCollection, StorageCollection, StorageIterator, }; use sp_storage::{ChildInfo, StorageData, StorageKey}; +pub use sp_trie::MerkleValue; use crate::{blockchain::Backend as BlockchainBackend, UsageInfo}; @@ -470,6 +471,21 @@ pub trait StorageProvider> { child_info: &ChildInfo, key: &StorageKey, ) -> sp_blockchain::Result>; + + /// Given a block's `Hash` and a key, return the closest merkle value. + fn closest_merkle_value( + &self, + hash: Block::Hash, + key: &StorageKey, + ) -> sp_blockchain::Result>>; + + /// Given a block's `Hash`, a key and a child storage key, return the closest merkle value. + fn child_closest_merkle_value( + &self, + hash: Block::Hash, + child_info: &ChildInfo, + key: &StorageKey, + ) -> sp_blockchain::Result>>; } /// Client backend. diff --git a/substrate/client/db/src/bench.rs b/substrate/client/db/src/bench.rs index 38c37a42ede7..03ad4817b53b 100644 --- a/substrate/client/db/src/bench.rs +++ b/substrate/client/db/src/bench.rs @@ -37,7 +37,7 @@ use sp_state_machine::{ }; use sp_trie::{ cache::{CacheSize, SharedTrieCache}, - prefixed_key, MemoryDB, + prefixed_key, MemoryDB, MerkleValue, }; use std::{ cell::{Cell, RefCell}, @@ -382,6 +382,27 @@ impl StateBackend> for BenchmarkingState { .child_storage_hash(child_info, key) } + fn closest_merkle_value( + &self, + key: &[u8], + ) -> Result>, Self::Error> { + self.add_read_key(None, key); + self.state.borrow().as_ref().ok_or_else(state_err)?.closest_merkle_value(key) + } + + fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>, Self::Error> { + self.add_read_key(None, key); + self.state + .borrow() + .as_ref() + .ok_or_else(state_err)? + .child_closest_merkle_value(child_info, key) + } + fn exists_storage(&self, key: &[u8]) -> Result { self.add_read_key(None, key); self.state.borrow().as_ref().ok_or_else(state_err)?.exists_storage(key) diff --git a/substrate/client/db/src/lib.rs b/substrate/client/db/src/lib.rs index 73fb4f8ce6db..194bec8a88eb 100644 --- a/substrate/client/db/src/lib.rs +++ b/substrate/client/db/src/lib.rs @@ -90,7 +90,7 @@ use sp_state_machine::{ OffchainChangesCollection, StateMachineStats, StorageCollection, StorageIterator, StorageKey, StorageValue, UsageInfo as StateUsageInfo, }; -use sp_trie::{cache::SharedTrieCache, prefixed_key, MemoryDB, PrefixedMemoryDB}; +use sp_trie::{cache::SharedTrieCache, prefixed_key, MemoryDB, MerkleValue, PrefixedMemoryDB}; // Re-export the Database trait so that one can pass an implementation of it. pub use sc_state_db::PruningMode; @@ -214,6 +214,21 @@ impl StateBackend> for RefTrackingState { self.state.child_storage_hash(child_info, key) } + fn closest_merkle_value( + &self, + key: &[u8], + ) -> Result>, Self::Error> { + self.state.closest_merkle_value(key) + } + + fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>, Self::Error> { + self.state.child_closest_merkle_value(child_info, key) + } + fn exists_storage(&self, key: &[u8]) -> Result { self.state.exists_storage(key) } diff --git a/substrate/client/db/src/record_stats_state.rs b/substrate/client/db/src/record_stats_state.rs index 29ece84f97e5..d9a35c075d79 100644 --- a/substrate/client/db/src/record_stats_state.rs +++ b/substrate/client/db/src/record_stats_state.rs @@ -28,6 +28,7 @@ use sp_state_machine::{ backend::{AsTrieBackend, Backend as StateBackend}, BackendTransaction, IterArgs, StorageIterator, StorageKey, StorageValue, TrieBackend, }; +use sp_trie::MerkleValue; use std::sync::Arc; /// State abstraction for recording stats about state access. @@ -144,6 +145,21 @@ impl>, B: BlockT> StateBackend> self.state.child_storage_hash(child_info, key) } + fn closest_merkle_value( + &self, + key: &[u8], + ) -> Result>, Self::Error> { + self.state.closest_merkle_value(key) + } + + fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>, Self::Error> { + self.state.child_closest_merkle_value(child_info, key) + } + fn exists_storage(&self, key: &[u8]) -> Result { self.state.exists_storage(key) } diff --git a/substrate/client/rpc-spec-v2/src/chain_head/chain_head.rs b/substrate/client/rpc-spec-v2/src/chain_head/chain_head.rs index 14364c331e6c..a8c1c4f7e083 100644 --- a/substrate/client/rpc-spec-v2/src/chain_head/chain_head.rs +++ b/substrate/client/rpc-spec-v2/src/chain_head/chain_head.rs @@ -27,7 +27,7 @@ use crate::{ api::ChainHeadApiServer, chain_head_follow::ChainHeadFollower, error::Error as ChainHeadRpcError, - event::{FollowEvent, MethodResponse, OperationError, StorageQuery, StorageQueryType}, + event::{FollowEvent, MethodResponse, OperationError, StorageQuery}, hex_string, subscription::{SubscriptionManagement, SubscriptionManagementError}, }, @@ -329,19 +329,10 @@ where let items = items .into_iter() .map(|query| { - if query.query_type == StorageQueryType::ClosestDescendantMerkleValue { - // Note: remove this once all types are implemented. - return Err(ChainHeadRpcError::InvalidParam( - "Storage query type not supported".into(), - )) - } - - Ok(StorageQuery { - key: StorageKey(parse_hex_param(query.key)?), - query_type: query.query_type, - }) + let key = StorageKey(parse_hex_param(query.key)?); + Ok(StorageQuery { key, query_type: query.query_type }) }) - .collect::, _>>()?; + .collect::, ChainHeadRpcError>>()?; let child_trie = child_trie .map(|child_trie| parse_hex_param(child_trie)) diff --git a/substrate/client/rpc-spec-v2/src/chain_head/chain_head_storage.rs b/substrate/client/rpc-spec-v2/src/chain_head/chain_head_storage.rs index 48a673f47e3b..7095548a2b16 100644 --- a/substrate/client/rpc-spec-v2/src/chain_head/chain_head_storage.rs +++ b/substrate/client/rpc-spec-v2/src/chain_head/chain_head_storage.rs @@ -145,6 +145,36 @@ where .unwrap_or_else(|error| QueryResult::Err(error.to_string())) } + /// Fetch the closest merkle value. + fn query_storage_merkle_value( + &self, + hash: Block::Hash, + key: &StorageKey, + child_key: Option<&ChildInfo>, + ) -> QueryResult { + let result = if let Some(child_key) = child_key { + self.client.child_closest_merkle_value(hash, child_key, key) + } else { + self.client.closest_merkle_value(hash, key) + }; + + result + .map(|opt| { + QueryResult::Ok(opt.map(|storage_data| { + let result = match &storage_data { + sc_client_api::MerkleValue::Node(data) => hex_string(&data.as_slice()), + sc_client_api::MerkleValue::Hash(hash) => hex_string(&hash.as_ref()), + }; + + StorageResult { + key: hex_string(&key.0), + result: StorageResultType::ClosestDescendantMerkleValue(result), + } + })) + }) + .unwrap_or_else(|error| QueryResult::Err(error.to_string())) + } + /// Iterate over at most `operation_max_storage_items` keys. /// /// Returns the storage result with a potential next key to resume iteration. @@ -286,13 +316,21 @@ where return }, }, + StorageQueryType::ClosestDescendantMerkleValue => + match self.query_storage_merkle_value(hash, &item.key, child_key.as_ref()) { + Ok(Some(value)) => storage_results.push(value), + Ok(None) => continue, + Err(error) => { + send_error::(&sender, operation.operation_id(), error); + return + }, + }, StorageQueryType::DescendantsValues => self .iter_operations .push_back(QueryIter { next_key: item.key, ty: IterQueryType::Value }), StorageQueryType::DescendantsHashes => self .iter_operations .push_back(QueryIter { next_key: item.key, ty: IterQueryType::Hash }), - _ => continue, }; } diff --git a/substrate/client/rpc-spec-v2/src/chain_head/test_utils.rs b/substrate/client/rpc-spec-v2/src/chain_head/test_utils.rs index 6e92e87608b4..a901f3039ffe 100644 --- a/substrate/client/rpc-spec-v2/src/chain_head/test_utils.rs +++ b/substrate/client/rpc-spec-v2/src/chain_head/test_utils.rs @@ -20,8 +20,8 @@ use parking_lot::Mutex; use sc_client_api::{ execution_extensions::ExecutionExtensions, BlockBackend, BlockImportNotification, BlockchainEvents, CallExecutor, ChildInfo, ExecutorProvider, FinalityNotification, - FinalityNotifications, FinalizeSummary, ImportNotifications, KeysIter, PairsIter, StorageData, - StorageEventStream, StorageKey, StorageProvider, + FinalityNotifications, FinalizeSummary, ImportNotifications, KeysIter, MerkleValue, PairsIter, + StorageData, StorageEventStream, StorageKey, StorageProvider, }; use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedSender}; use sp_api::{CallApiAt, CallApiAtParams, NumberFor, RuntimeVersion}; @@ -198,6 +198,23 @@ impl< ) -> sp_blockchain::Result> { self.client.child_storage_hash(hash, child_info, key) } + + fn closest_merkle_value( + &self, + hash: Block::Hash, + key: &StorageKey, + ) -> sp_blockchain::Result>> { + self.client.closest_merkle_value(hash, key) + } + + fn child_closest_merkle_value( + &self, + hash: Block::Hash, + child_info: &ChildInfo, + key: &StorageKey, + ) -> sp_blockchain::Result>> { + self.client.child_closest_merkle_value(hash, child_info, key) + } } impl> CallApiAt for ChainHeadMockClient { diff --git a/substrate/client/rpc-spec-v2/src/chain_head/tests.rs b/substrate/client/rpc-spec-v2/src/chain_head/tests.rs index 1336cff84b6f..3ab47991c4e5 100644 --- a/substrate/client/rpc-spec-v2/src/chain_head/tests.rs +++ b/substrate/client/rpc-spec-v2/src/chain_head/tests.rs @@ -43,7 +43,12 @@ use sp_core::{ Blake2Hasher, Hasher, }; use sp_version::RuntimeVersion; -use std::{collections::HashSet, fmt::Debug, sync::Arc, time::Duration}; +use std::{ + collections::{HashMap, HashSet}, + fmt::Debug, + sync::Arc, + time::Duration, +}; use substrate_test_runtime::Transfer; use substrate_test_runtime_client::{ prelude::*, runtime, runtime::RuntimeApi, Backend, BlockBuilderExt, Client, @@ -2583,3 +2588,186 @@ async fn stop_storage_operation() { ) .await; } + +#[tokio::test] +async fn storage_closest_merkle_value() { + let (mut client, api, mut sub, sub_id, _) = setup_api().await; + + /// The core of this test. + /// + /// Checks keys that are exact match, keys with descedant and keys that should not return + /// values. + /// + /// Returns (key, merkle value) pairs. + async fn expect_merkle_request( + api: &RpcModule>>, + mut sub: &mut RpcSubscription, + sub_id: String, + block_hash: String, + ) -> HashMap { + // Valid call with storage at the keys. + let response: MethodResponse = api + .call( + "chainHead_unstable_storage", + rpc_params![ + &sub_id, + &block_hash, + vec![ + StorageQuery { + key: hex_string(b":AAAA"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + StorageQuery { + key: hex_string(b":AAAB"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + // Key with descedent. + StorageQuery { + key: hex_string(b":A"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + StorageQuery { + key: hex_string(b":AA"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + // Keys below this comment do not produce a result. + // Key that exceed the keyspace of the trie. + StorageQuery { + key: hex_string(b":AAAAX"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + StorageQuery { + key: hex_string(b":AAABX"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + // Key that are not part of the trie. + StorageQuery { + key: hex_string(b":AAX"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + StorageQuery { + key: hex_string(b":AAAX"), + query_type: StorageQueryType::ClosestDescendantMerkleValue + }, + ] + ], + ) + .await + .unwrap(); + let operation_id = match response { + MethodResponse::Started(started) => started.operation_id, + MethodResponse::LimitReached => panic!("Expected started response"), + }; + + let event = get_next_event::>(&mut sub).await; + let merkle_values: HashMap<_, _> = match event { + FollowEvent::OperationStorageItems(res) => { + assert_eq!(res.operation_id, operation_id); + + res.items + .into_iter() + .map(|res| { + let value = match res.result { + StorageResultType::ClosestDescendantMerkleValue(value) => value, + _ => panic!("Unexpected StorageResultType"), + }; + (res.key, value) + }) + .collect() + }, + _ => panic!("Expected OperationStorageItems event"), + }; + + // Finished. + assert_matches!( + get_next_event::>(&mut sub).await, + FollowEvent::OperationStorageDone(done) if done.operation_id == operation_id + ); + + // Response for AAAA, AAAB, A and AA. + assert_eq!(merkle_values.len(), 4); + + // While checking for expected merkle values to align, + // the following will check that the returned keys are + // expected. + + // Values for AAAA and AAAB are different. + assert_ne!( + merkle_values.get(&hex_string(b":AAAA")).unwrap(), + merkle_values.get(&hex_string(b":AAAB")).unwrap() + ); + + // Values for A and AA should be on the same branch node. + assert_eq!( + merkle_values.get(&hex_string(b":A")).unwrap(), + merkle_values.get(&hex_string(b":AA")).unwrap() + ); + // The branch node value must be different than the leaf of either + // AAAA and AAAB. + assert_ne!( + merkle_values.get(&hex_string(b":A")).unwrap(), + merkle_values.get(&hex_string(b":AAAA")).unwrap() + ); + assert_ne!( + merkle_values.get(&hex_string(b":A")).unwrap(), + merkle_values.get(&hex_string(b":AAAB")).unwrap() + ); + + merkle_values + } + + // Import a new block with storage changes. + let mut builder = client.new_block(Default::default()).unwrap(); + builder.push_storage_change(b":AAAA".to_vec(), Some(vec![1; 64])).unwrap(); + builder.push_storage_change(b":AAAB".to_vec(), Some(vec![2; 64])).unwrap(); + let block = builder.build().unwrap().block; + let block_hash = format!("{:?}", block.header.hash()); + client.import(BlockOrigin::Own, block.clone()).await.unwrap(); + + // Ensure the imported block is propagated and pinned for this subscription. + assert_matches!( + get_next_event::>(&mut sub).await, + FollowEvent::NewBlock(_) + ); + assert_matches!( + get_next_event::>(&mut sub).await, + FollowEvent::BestBlockChanged(_) + ); + + let merkle_values_lhs = expect_merkle_request(&api, &mut sub, sub_id.clone(), block_hash).await; + + // Import a new block with and change AAAB value. + let mut builder = client.new_block(Default::default()).unwrap(); + builder.push_storage_change(b":AAAA".to_vec(), Some(vec![1; 64])).unwrap(); + builder.push_storage_change(b":AAAB".to_vec(), Some(vec![3; 64])).unwrap(); + let block = builder.build().unwrap().block; + let block_hash = format!("{:?}", block.header.hash()); + client.import(BlockOrigin::Own, block.clone()).await.unwrap(); + + // Ensure the imported block is propagated and pinned for this subscription. + assert_matches!( + get_next_event::>(&mut sub).await, + FollowEvent::NewBlock(_) + ); + assert_matches!( + get_next_event::>(&mut sub).await, + FollowEvent::BestBlockChanged(_) + ); + + let merkle_values_rhs = expect_merkle_request(&api, &mut sub, sub_id.clone(), block_hash).await; + + // Change propagated to the root. + assert_ne!( + merkle_values_lhs.get(&hex_string(b":A")).unwrap(), + merkle_values_rhs.get(&hex_string(b":A")).unwrap() + ); + assert_ne!( + merkle_values_lhs.get(&hex_string(b":AAAB")).unwrap(), + merkle_values_rhs.get(&hex_string(b":AAAB")).unwrap() + ); + // However the AAAA branch leaf remains unchanged. + assert_eq!( + merkle_values_lhs.get(&hex_string(b":AAAA")).unwrap(), + merkle_values_rhs.get(&hex_string(b":AAAA")).unwrap() + ); +} diff --git a/substrate/client/service/src/client/client.rs b/substrate/client/service/src/client/client.rs index 09c1673884aa..26dcd0f9e21a 100644 --- a/substrate/client/service/src/client/client.rs +++ b/substrate/client/service/src/client/client.rs @@ -78,7 +78,7 @@ use sp_state_machine::{ ChildStorageCollection, KeyValueStates, KeyValueStorageLevel, StorageCollection, MAX_NESTED_TRIE_DEPTH, }; -use sp_trie::{CompactProof, StorageProof}; +use sp_trie::{CompactProof, MerkleValue, StorageProof}; use std::{ collections::{HashMap, HashSet}, marker::PhantomData, @@ -1545,6 +1545,27 @@ where .child_storage_hash(child_info, &key.0) .map_err(|e| sp_blockchain::Error::from_state(Box::new(e))) } + + fn closest_merkle_value( + &self, + hash: ::Hash, + key: &StorageKey, + ) -> blockchain::Result::Hash>>> { + self.state_at(hash)? + .closest_merkle_value(&key.0) + .map_err(|e| sp_blockchain::Error::from_state(Box::new(e))) + } + + fn child_closest_merkle_value( + &self, + hash: ::Hash, + child_info: &ChildInfo, + key: &StorageKey, + ) -> blockchain::Result::Hash>>> { + self.state_at(hash)? + .child_closest_merkle_value(child_info, &key.0) + .map_err(|e| sp_blockchain::Error::from_state(Box::new(e))) + } } impl HeaderMetadata for Client diff --git a/substrate/primitives/state-machine/src/backend.rs b/substrate/primitives/state-machine/src/backend.rs index 2a25bdc54d94..ea9cd442d70b 100644 --- a/substrate/primitives/state-machine/src/backend.rs +++ b/substrate/primitives/state-machine/src/backend.rs @@ -30,7 +30,7 @@ use sp_core::storage::{ChildInfo, StateVersion, TrackedStorageKey}; #[cfg(feature = "std")] use sp_core::traits::RuntimeCode; use sp_std::vec::Vec; -use sp_trie::PrefixedMemoryDB; +use sp_trie::{MerkleValue, PrefixedMemoryDB}; /// A struct containing arguments for iterating over the storage. #[derive(Default)] @@ -195,7 +195,17 @@ pub trait Backend: sp_std::fmt::Debug { /// Get keyed storage value hash or None if there is nothing associated. fn storage_hash(&self, key: &[u8]) -> Result, Self::Error>; - /// Get keyed child storage or None if there is nothing associated. + /// Get the merkle value or None if there is nothing associated. + fn closest_merkle_value(&self, key: &[u8]) -> Result>, Self::Error>; + + /// Get the child merkle value or None if there is nothing associated. + fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>, Self::Error>; + + /// Get child keyed child storage or None if there is nothing associated. fn child_storage( &self, child_info: &ChildInfo, diff --git a/substrate/primitives/state-machine/src/trie_backend.rs b/substrate/primitives/state-machine/src/trie_backend.rs index cc7132181f90..afa80addd2ba 100644 --- a/substrate/primitives/state-machine/src/trie_backend.rs +++ b/substrate/primitives/state-machine/src/trie_backend.rs @@ -30,7 +30,6 @@ use codec::Codec; use hash_db::HashDB; use hash_db::Hasher; use sp_core::storage::{ChildInfo, StateVersion}; -use sp_trie::PrefixedMemoryDB; #[cfg(feature = "std")] use sp_trie::{ cache::{LocalTrieCache, TrieCache}, @@ -39,6 +38,7 @@ use sp_trie::{ }; #[cfg(not(feature = "std"))] use sp_trie::{Error, NodeCodec}; +use sp_trie::{MerkleValue, PrefixedMemoryDB}; use trie_db::TrieCache as TrieCacheT; #[cfg(not(feature = "std"))] use trie_db::{node::NodeOwned, CachedValue}; @@ -405,6 +405,18 @@ where self.essence.child_storage(child_info, key) } + fn closest_merkle_value(&self, key: &[u8]) -> Result>, Self::Error> { + self.essence.closest_merkle_value(key) + } + + fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>, Self::Error> { + self.essence.child_closest_merkle_value(child_info, key) + } + fn next_storage_key(&self, key: &[u8]) -> Result, Self::Error> { let (is_cached, mut cache) = access_cache(&self.next_storage_key_cache, Option::take) .map(|cache| (cache.last_key == key, cache)) diff --git a/substrate/primitives/state-machine/src/trie_backend_essence.rs b/substrate/primitives/state-machine/src/trie_backend_essence.rs index 4bb51f4a1343..ad7aeab899c8 100644 --- a/substrate/primitives/state-machine/src/trie_backend_essence.rs +++ b/substrate/primitives/state-machine/src/trie_backend_essence.rs @@ -32,11 +32,12 @@ use sp_std::{boxed::Box, marker::PhantomData, vec::Vec}; #[cfg(feature = "std")] use sp_trie::recorder::Recorder; use sp_trie::{ - child_delta_trie_root, delta_trie_root, empty_child_trie_root, read_child_trie_hash, - read_child_trie_value, read_trie_value, + child_delta_trie_root, delta_trie_root, empty_child_trie_root, + read_child_trie_first_descedant_value, read_child_trie_hash, read_child_trie_value, + read_trie_first_descedant_value, read_trie_value, trie_types::{TrieDBBuilder, TrieError}, - DBValue, KeySpacedDB, NodeCodec, PrefixedMemoryDB, Trie, TrieCache, TrieDBRawIterator, - TrieRecorder, + DBValue, KeySpacedDB, MerkleValue, NodeCodec, PrefixedMemoryDB, Trie, TrieCache, + TrieDBRawIterator, TrieRecorder, }; #[cfg(feature = "std")] use std::{collections::HashMap, sync::Arc}; @@ -574,6 +575,39 @@ where }) } + /// Get the closest merkle value at given key. + pub fn closest_merkle_value(&self, key: &[u8]) -> Result>> { + let map_e = |e| format!("Trie lookup error: {}", e); + + self.with_recorder_and_cache(None, |recorder, cache| { + read_trie_first_descedant_value::, _>(self, &self.root, key, recorder, cache) + .map_err(map_e) + }) + } + + /// Get the child closest merkle value at given key. + pub fn child_closest_merkle_value( + &self, + child_info: &ChildInfo, + key: &[u8], + ) -> Result>> { + let Some(child_root) = self.child_root(child_info)? else { return Ok(None) }; + + let map_e = |e| format!("Trie lookup error: {}", e); + + self.with_recorder_and_cache(Some(child_root), |recorder, cache| { + read_child_trie_first_descedant_value::, _>( + child_info.keyspace(), + self, + &child_root, + key, + recorder, + cache, + ) + .map_err(map_e) + }) + } + /// Create a raw iterator over the storage. pub fn raw_iter(&self, args: IterArgs) -> Result> { let root = if let Some(child_info) = args.child_info.as_ref() { diff --git a/substrate/primitives/trie/src/lib.rs b/substrate/primitives/trie/src/lib.rs index 94155458569b..1a1ed670454d 100644 --- a/substrate/primitives/trie/src/lib.rs +++ b/substrate/primitives/trie/src/lib.rs @@ -44,7 +44,6 @@ pub use storage_proof::{CompactProof, StorageProof}; /// Trie codec reexport, mainly child trie support /// for trie compact proof. pub use trie_codec::{decode_compact, encode_compact, Error as CompactProofError}; -pub use trie_db::proof::VerifyError; use trie_db::proof::{generate_proof, verify_proof}; /// Various re-exports from the `trie-db` crate. pub use trie_db::{ @@ -53,6 +52,7 @@ pub use trie_db::{ CError, DBValue, Query, Recorder, Trie, TrieCache, TrieConfiguration, TrieDBIterator, TrieDBKeyIterator, TrieDBRawIterator, TrieLayout, TrieMut, TrieRecorder, }; +pub use trie_db::{proof::VerifyError, MerkleValue}; /// The Substrate format implementation of `TrieStream`. pub use trie_stream::TrieStream; @@ -295,6 +295,25 @@ pub fn read_trie_value( + db: &DB, + root: &TrieHash, + key: &[u8], + recorder: Option<&mut dyn TrieRecorder>>, + cache: Option<&mut dyn TrieCache>, +) -> Result>>, Box>> +where + DB: hash_db::HashDBRef, +{ + TrieDBBuilder::::new(db, root) + .with_optional_cache(cache) + .with_optional_recorder(recorder) + .build() + .lookup_first_descendant(key) +} + /// Read a value from the trie with given Query. pub fn read_trie_value_with< L: TrieLayout, @@ -397,6 +416,27 @@ where .get_hash(key) } +/// Read the [`trie_db::MerkleValue`] of the node that is the closest descendant for +/// the provided child key. +pub fn read_child_trie_first_descedant_value( + keyspace: &[u8], + db: &DB, + root: &TrieHash, + key: &[u8], + recorder: Option<&mut dyn TrieRecorder>>, + cache: Option<&mut dyn TrieCache>, +) -> Result>>, Box>> +where + DB: hash_db::HashDBRef, +{ + let db = KeySpacedDB::new(db, keyspace); + TrieDBBuilder::::new(&db, &root) + .with_optional_recorder(recorder) + .with_optional_cache(cache) + .build() + .lookup_first_descendant(key) +} + /// Read a value from the child trie with given query. pub fn read_child_trie_value_with( keyspace: &[u8],