Remove state_prefetcher.go (#447)

core/blockchain.go

@@ -230,11 +230,10 @@ type BlockChain struct {
 
 	stopping atomic.Bool // false if chain is running, true when stopped
 
-	engine     consensus.Engine
-	validator  Validator  // Block and state validator interface
-	prefetcher Prefetcher // Block state prefetcher interface
-	processor  Processor  // Block transaction processor interface
-	vmConfig   vm.Config
+	engine    consensus.Engine
+	validator Validator // Block and state validator interface
+	processor Processor // Block transaction processor interface
+	vmConfig  vm.Config
 
 	lastAccepted *types.Block // Prevents reorgs past this height
 
@@ -335,7 +334,6 @@ func NewBlockChain(
 	}
 	bc.stateCache = state.NewDatabaseWithNodeDB(bc.db, bc.triedb)
 	bc.validator = NewBlockValidator(chainConfig, bc, engine)
-	bc.prefetcher = newStatePrefetcher(chainConfig, bc, engine)
 	bc.processor = NewStateProcessor(chainConfig, bc, engine)
 
 	bc.hc, err = NewHeaderChain(db, chainConfig, cacheConfig, engine)
@@ -1321,8 +1319,6 @@ func (bc *BlockChain) insertBlock(block *types.Block, writes bool) error {
 	statedb.StartPrefetcher("chain", bc.cacheConfig.TriePrefetcherParallelism)
 	activeState = statedb
 
-	// If we have a followup block, run that against the current state to pre-cache
-	// transactions and probabilistically some of the account/storage trie nodes.
 	// Process block using the parent state as reference point
 	pstart := time.Now()
 	receipts, logs, usedGas, err := bc.processor.Process(block, parent, statedb, bc.vmConfig)

core/types.go

@@ -27,8 +27,6 @@
 package core
 
 import (
-	"sync/atomic"
-
 	"github.com/ava-labs/coreth/core/state"
 	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/coreth/core/vm"
@@ -46,14 +44,6 @@ type Validator interface {
 	ValidateState(block *types.Block, state *state.StateDB, receipts types.Receipts, usedGas uint64) error
 }
 
-// Prefetcher is an interface for pre-caching transaction signatures and state.
-type Prefetcher interface {
-	// Prefetch processes the state changes according to the Ethereum rules by running
-	// the transaction messages using the statedb, but any changes are discarded. The
-	// only goal is to pre-cache transaction signatures and state trie nodes.
-	Prefetch(block *types.Block, statedb *state.StateDB, cfg vm.Config, interrupt *atomic.Bool)
-}
-
 // Processor is an interface for processing blocks using a given initial state.
 type Processor interface {
 	// Process processes the state changes according to the Ethereum rules by running