core, internal, eth, miner, les: Take VM config from BlockChain (#17955)

Until this commit, when sending an RPC request that called `NewEVM`, a blank `vm.Config`
would be taken so as to set some options, based on the default configuration. If some extra
configuration switches were passed to the blockchain, those would be ignored.

This PR adds a function to get the config from the blockchain, and this is what is now used
for RPC calls.

Some subsequent changes need to be made, see https://github.com/ethereum/go-ethereum/pull/17955#pullrequestreview-182237244
for the details of the discussion.

6 files changed, 15 insertions, 11 deletions

diff --git a/core/blockchain.go b/core/blockchain.go
index a672c0ab6..c29063a73 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -210,6 +210,11 @@ func (bc *BlockChain) getProcInterrupt() bool {
 	return atomic.LoadInt32(&bc.procInterrupt) == 1
 }
 
+// GetVMConfig returns the block chain VM config.
+func (bc *BlockChain) GetVMConfig() *vm.Config {
+	return &bc.vmConfig
+}
+
 // loadLastState loads the last known chain state from the database. This method
 // assumes that the chain manager mutex is held.
 func (bc *BlockChain) loadLastState() error {
diff --git a/eth/api_backend.go b/eth/api_backend.go
index 8748d444f..a48815e0d 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -125,12 +125,12 @@ func (b *EthAPIBackend) GetTd(blockHash common.Hash) *big.Int {
 	return b.eth.blockchain.GetTdByHash(blockHash)
 }
 
-func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
+func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
 	state.SetBalance(msg.From(), math.MaxBig256)
 	vmError := func() error { return nil }
 
 	context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
-	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), vmError, nil
+	return vm.NewEVM(context, state, b.eth.chainConfig, *b.eth.blockchain.GetVMConfig()), vmError, nil
 }
 
 func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 43a33e992..656555b3b 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -683,7 +683,7 @@ type CallArgs struct {
 	Data     hexutil.Bytes   `json:"data"`
 }
 
-func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber, vmCfg vm.Config, timeout time.Duration) ([]byte, uint64, bool, error) {
+func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber, timeout time.Duration) ([]byte, uint64, bool, error) {
 	defer func(start time.Time) { log.Debug("Executing EVM call finished", "runtime", time.Since(start)) }(time.Now())
 
 	state, header, err := s.b.StateAndHeaderByNumber(ctx, blockNr)
@@ -724,7 +724,7 @@ func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr
 	defer cancel()
 
 	// Get a new instance of the EVM.
-	evm, vmError, err := s.b.GetEVM(ctx, msg, state, header, vmCfg)
+	evm, vmError, err := s.b.GetEVM(ctx, msg, state, header)
 	if err != nil {
 		return nil, 0, false, err
 	}
@@ -748,7 +748,7 @@ func (s *PublicBlockChainAPI) doCall(ctx context.Context, args CallArgs, blockNr
 // Call executes the given transaction on the state for the given block number.
 // It doesn't make and changes in the state/blockchain and is useful to execute and retrieve values.
 func (s *PublicBlockChainAPI) Call(ctx context.Context, args CallArgs, blockNr rpc.BlockNumber) (hexutil.Bytes, error) {
-	result, _, _, err := s.doCall(ctx, args, blockNr, vm.Config{}, 5*time.Second)
+	result, _, _, err := s.doCall(ctx, args, blockNr, 5*time.Second)
 	return (hexutil.Bytes)(result), err
 }
 
@@ -777,7 +777,7 @@ func (s *PublicBlockChainAPI) EstimateGas(ctx context.Context, args CallArgs) (h
 	executable := func(gas uint64) bool {
 		args.Gas = hexutil.Uint64(gas)
 
-		_, _, failed, err := s.doCall(ctx, args, rpc.PendingBlockNumber, vm.Config{}, 0)
+		_, _, failed, err := s.doCall(ctx, args, rpc.PendingBlockNumber, 0)
 		if err != nil || failed {
 			return false
 		}
diff --git a/internal/ethapi/backend.go b/internal/ethapi/backend.go
index c9ffe230c..e23ee03b1 100644
--- a/internal/ethapi/backend.go
+++ b/internal/ethapi/backend.go
@@ -53,7 +53,7 @@ type Backend interface {
 	GetBlock(ctx context.Context, blockHash common.Hash) (*types.Block, error)
 	GetReceipts(ctx context.Context, blockHash common.Hash) (types.Receipts, error)
 	GetTd(blockHash common.Hash) *big.Int
-	GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error)
+	GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error)
 	SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription
 	SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription
 	SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription
diff --git a/les/api_backend.go b/les/api_backend.go
index aa748a4ea..753139623 100644
--- a/les/api_backend.go
+++ b/les/api_backend.go
@@ -105,10 +105,10 @@ func (b *LesApiBackend) GetTd(hash common.Hash) *big.Int {
 	return b.eth.blockchain.GetTdByHash(hash)
 }
 
-func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmCfg vm.Config) (*vm.EVM, func() error, error) {
+func (b *LesApiBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
 	state.SetBalance(msg.From(), math.MaxBig256)
 	context := core.NewEVMContext(msg, header, b.eth.blockchain, nil)
-	return vm.NewEVM(context, state, b.eth.chainConfig, vmCfg), state.Error, nil
+	return vm.NewEVM(context, state, b.eth.chainConfig, vm.Config{}), state.Error, nil
 }
 
 func (b *LesApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
diff --git a/miner/worker.go b/miner/worker.go
index 8579c5c84..48473796b 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -31,7 +31,6 @@ import (
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
@@ -692,7 +691,7 @@ func (w *worker) updateSnapshot() {
 func (w *worker) commitTransaction(tx *types.Transaction, coinbase common.Address) ([]*types.Log, error) {
 	snap := w.current.state.Snapshot()
 
-	receipt, _, err := core.ApplyTransaction(w.config, w.chain, &coinbase, w.current.gasPool, w.current.state, w.current.header, tx, &w.current.header.GasUsed, vm.Config{})
+	receipt, _, err := core.ApplyTransaction(w.config, w.chain, &coinbase, w.current.gasPool, w.current.state, w.current.header, tx, &w.current.header.GasUsed, *w.chain.GetVMConfig())
 	if err != nil {
 		w.current.state.RevertToSnapshot(snap)
 		return nil, err