core, eth, les, trie: add a prefix to contract code (#21080)

core/blockchain.go

@@ -112,7 +112,10 @@ const (
 	// - Version 7
 	//  The following incompatible database changes were added:
 	//    * Use freezer as the ancient database to maintain all ancient data
-	BlockChainVersion uint64 = 7
+	// - Version 8
+	//  The following incompatible database changes were added:
+	//    * New scheme for contract code in order to separate the codes and trie nodes
+	BlockChainVersion uint64 = 8
 )
 
 // CacheConfig contains the configuration values for the trie caching/pruning
@@ -895,12 +898,30 @@ func (bc *BlockChain) GetUnclesInChain(block *types.Block, length int) []*types.
 	return uncles
 }
 
-// TrieNode retrieves a blob of data associated with a trie node (or code hash)
+// TrieNode retrieves a blob of data associated with a trie node
 // either from ephemeral in-memory cache, or from persistent storage.
 func (bc *BlockChain) TrieNode(hash common.Hash) ([]byte, error) {
 	return bc.stateCache.TrieDB().Node(hash)
 }
 
+// ContractCode retrieves a blob of data associated with a contract hash
+// either from ephemeral in-memory cache, or from persistent storage.
+func (bc *BlockChain) ContractCode(hash common.Hash) ([]byte, error) {
+	return bc.stateCache.ContractCode(common.Hash{}, hash)
+}
+
+// ContractCodeWithPrefix retrieves a blob of data associated with a contract
+// hash either from ephemeral in-memory cache, or from persistent storage.
+//
+// If the code doesn't exist in the in-memory cache, check the storage with
+// new code scheme.
+func (bc *BlockChain) ContractCodeWithPrefix(hash common.Hash) ([]byte, error) {
+	type codeReader interface {
+		ContractCodeWithPrefix(addrHash, codeHash common.Hash) ([]byte, error)
+	}
+	return bc.stateCache.(codeReader).ContractCodeWithPrefix(common.Hash{}, hash)
+}
+
 // Stop stops the blockchain service. If any imports are currently in progress
 // it will abort them using the procInterrupt.
 func (bc *BlockChain) Stop() {