Add EthChainID and update signers accordingly for processing eth txns. (#3497)

* allow eth hmy txn conversion

* Add EthChainID and update signers for it

* resolve comments about hash()

cmd/harmony/main.go

@@ -16,6 +16,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/harmony-one/harmony/internal/params"
+
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/harmony-one/bls/ffi/go/bls"
@@ -279,6 +281,9 @@ func setupNodeAndRun(hc harmonyConfig) {
 	nodeconfig.GetDefaultConfig().ShardID = nodeConfig.ShardID
 	nodeconfig.GetDefaultConfig().IsOffline = nodeConfig.IsOffline
 
+	// Update ethereum compatible chain ids
+	params.UpdateEthChainIDByShard(nodeConfig.ShardID)
+
 	// Check NTP configuration
 	accurate, err := ntp.CheckLocalTimeAccurate(nodeConfig.NtpServer)
 	if !accurate {

core/blockchain.go

@@ -956,6 +956,7 @@ func (bc *BlockChain) Rollback(chain []common.Hash) error {
 // SetReceiptsData computes all the non-consensus fields of the receipts
 func SetReceiptsData(config *params.ChainConfig, block *types.Block, receipts types.Receipts) error {
 	signer := types.MakeSigner(config, block.Epoch())
+	ethSigner := types.NewEIP155Signer(config.EthCompatibleChainID)
 
 	transactions, stakingTransactions, logIndex := block.Transactions(), block.StakingTransactions(), uint(0)
 	if len(transactions)+len(stakingTransactions) != len(receipts) {
@@ -973,7 +974,12 @@ func SetReceiptsData(config *params.ChainConfig, block *types.Block, receipts ty
 		// The contract address can be derived from the transaction itself
 		if transactions[j].To() == nil {
 			// Deriving the signer is expensive, only do if it's actually needed
-			from, _ := types.Sender(signer, transactions[j])
+			var from common.Address
+			if transactions[j].IsEthCompatible() {
+				from, _ = types.Sender(ethSigner, transactions[j])
+			} else {
+				from, _ = types.Sender(signer, transactions[j])
+			}
 			receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
 		}
 		// The derived log fields can simply be set from the block and transaction

core/state_processor.go

@@ -187,7 +187,14 @@ func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *commo
 		)
 	}
 
-	msg, err := tx.AsMessage(types.MakeSigner(config, header.Epoch()))
+	var signer types.Signer
+	if tx.IsEthCompatible() {
+		signer = types.NewEIP155Signer(config.EthCompatibleChainID)
+	} else {
+		signer = types.MakeSigner(config, header.Epoch())
+	}
+	msg, err := tx.AsMessage(signer)
+
 	// skip signer err for additiononly tx
 	if err != nil {
 		return nil, nil, 0, err

core/types/eth_transaction.go

@@ -21,6 +21,8 @@ import (
 	"math/big"
 	"sync/atomic"
 
+	"github.com/harmony-one/harmony/internal/params"
+
 	"github.com/ethereum/go-ethereum/common/hexutil"
 
 	"github.com/harmony-one/harmony/crypto/hash"
@@ -32,9 +34,6 @@ import (
 
 //go:generate gencodec -type ethTxdata -field-override ethTxdataMarshaling -out gen_eth_tx_json.go
 
-// Shard0ChainID to be reserved unique chain ID for eth compatible chains.
-const Shard0ChainID = 0
-
 // EthTransaction ethereum-compatible transaction
 type EthTransaction struct {
 	data ethTxdata
@@ -152,12 +151,12 @@ func (tx *EthTransaction) Data() []byte {
 
 // ShardID returns which shard id this transaction was signed for (if at all)
 func (tx *EthTransaction) ShardID() uint32 {
-	return uint32(tx.ChainID().Uint64()) - Shard0ChainID
+	return uint32(tx.ChainID().Uint64() - params.EthMainnetChainID.Uint64())
 }
 
 // ToShardID returns the destination shard id this transaction is going to
 func (tx *EthTransaction) ToShardID() uint32 {
-	return uint32(tx.ChainID().Uint64()) - Shard0ChainID
+	return uint32(tx.ChainID().Uint64() - params.EthMainnetChainID.Uint64())
 }
 
 // ChainID returns which chain id this transaction was signed for (if at all)
@@ -177,6 +176,31 @@ func (tx *EthTransaction) Copy() *EthTransaction {
 	return &tx2
 }
 
+// ConvertToHmy converts eth txn to hmy txn by filling in ShardID and ToShardID fields.
+func (tx *EthTransaction) ConvertToHmy() *Transaction {
+	var tx2 Transaction
+	d := &tx.data
+	d2 := &tx2.data
+
+	d2.AccountNonce = d.AccountNonce
+	d2.Price = new(big.Int).Set(d.Price)
+	d2.GasLimit = d.GasLimit
+	d2.Recipient = copyAddr(d.Recipient)
+	d2.Amount = new(big.Int).Set(d.Amount)
+	d2.Payload = append(d.Payload[:0:0], d.Payload...)
+	d2.V = new(big.Int).Set(d.V)
+	d2.R = new(big.Int).Set(d.R)
+	d2.S = new(big.Int).Set(d.S)
+
+	d2.ShardID = tx.ShardID()
+	d2.ToShardID = tx.ToShardID()
+
+	copy := tx2.Hash()
+	d2.Hash = &copy
+
+	return &tx2
+}
+
 // EncodeRLP implements rlp.Encoder
 func (tx *EthTransaction) EncodeRLP(w io.Writer) error {
 	return rlp.Encode(w, &tx.data)
@@ -302,6 +326,11 @@ func (tx *EthTransaction) SenderAddress() (common.Address, error) {
 	return addr, nil
 }
 
+// IsEthCompatible returns whether the txn is ethereum compatible
+func (tx *EthTransaction) IsEthCompatible() bool {
+	return true
+}
+
 // AsMessage returns the transaction as a core.Message.
 //
 // AsMessage requires a signer to derive the sender.

core/types/transaction.go

@@ -24,6 +24,8 @@ import (
 	"math/big"
 	"sync/atomic"
 
+	"github.com/harmony-one/harmony/internal/params"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/crypto"
@@ -70,6 +72,7 @@ type InternalTransaction interface {
 	R() *big.Int
 	S() *big.Int
 
+	IsEthCompatible() bool
 	AsMessage(s Signer) (Message, error)
 }
 
@@ -412,6 +415,33 @@ func (tx *Transaction) Size() common.StorageSize {
 	return common.StorageSize(c)
 }
 
+// IsEthCompatible returns whether the txn is ethereum compatible
+func (tx *Transaction) IsEthCompatible() bool {
+	return params.IsEthCompatible(tx.ChainID())
+}
+
+// ConvertToEth converts hmy txn to eth txn by removing the ShardID and ToShardID fields.
+func (tx *Transaction) ConvertToEth() *EthTransaction {
+	var tx2 EthTransaction
+	d := &tx.data
+	d2 := &tx2.data
+
+	d2.AccountNonce = d.AccountNonce
+	d2.Price = new(big.Int).Set(d.Price)
+	d2.GasLimit = d.GasLimit
+	d2.Recipient = copyAddr(d.Recipient)
+	d2.Amount = new(big.Int).Set(d.Amount)
+	d2.Payload = append(d.Payload[:0:0], d.Payload...)
+	d2.V = new(big.Int).Set(d.V)
+	d2.R = new(big.Int).Set(d.R)
+	d2.S = new(big.Int).Set(d.S)
+
+	copy := tx2.Hash()
+	d2.Hash = &copy
+
+	return &tx2
+}
+
 // AsMessage returns the transaction as a core.Message.
 //
 // AsMessage requires a signer to derive the sender.
@@ -518,6 +548,7 @@ type TransactionsByPriceAndNonce struct {
 	txs       map[common.Address]Transactions // Per account nonce-sorted list of transactions
 	heads     TxByPrice                       // Next transaction for each unique account (price heap)
 	signer    Signer                          // Signer for the set of transactions
+	ethSigner Signer                          // Signer for the set of transactions
 }
 
 // NewTransactionsByPriceAndNonce creates a transaction set that can retrieve
@@ -525,12 +556,16 @@ type TransactionsByPriceAndNonce struct {
 //
 // Note, the input map is reowned so the caller should not interact any more with
 // if after providing it to the constructor.
-func NewTransactionsByPriceAndNonce(signer Signer, txs map[common.Address]Transactions) *TransactionsByPriceAndNonce {
+func NewTransactionsByPriceAndNonce(hmySigner Signer, ethSigner Signer, txs map[common.Address]Transactions) *TransactionsByPriceAndNonce {
 	// Initialize a price based heap with the head transactions
 	heads := make(TxByPrice, 0, len(txs))
 	for from, accTxs := range txs {
 		heads = append(heads, accTxs[0])
 		// Ensure the sender address is from the signer
+		signer := hmySigner
+		if accTxs[0].IsEthCompatible() {
+			signer = ethSigner
+		}
 		acc, _ := Sender(signer, accTxs[0])
 		txs[acc] = accTxs[1:]
 		if from != acc {
@@ -543,12 +578,13 @@ func NewTransactionsByPriceAndNonce(signer Signer, txs map[common.Address]Transa
 	return &TransactionsByPriceAndNonce{
 		txs:       txs,
 		heads:     heads,
-		signer: signer,
+		signer:    hmySigner,
+		ethSigner: ethSigner,
 	}
 }
 
 // Peek returns the next transaction by price.
-func (t *TransactionsByPriceAndNonce) Peek() InternalTransaction {
+func (t *TransactionsByPriceAndNonce) Peek() *Transaction {
 	if len(t.heads) == 0 {
 		return nil
 	}
@@ -557,7 +593,11 @@ func (t *TransactionsByPriceAndNonce) Peek() InternalTransaction {
 
 // Shift replaces the current best head with the next one from the same account.
 func (t *TransactionsByPriceAndNonce) Shift() {
-	acc, _ := Sender(t.signer, t.heads[0])
+	signer := t.signer
+	if t.heads[0].IsEthCompatible() {
+		signer = t.ethSigner
+	}
+	acc, _ := Sender(signer, t.heads[0])
 	if txs, ok := t.txs[acc]; ok && len(txs) > 0 {
 		t.heads[0], t.txs[acc] = txs[0], txs[1:]
 		heap.Fix(&t.heads, 0)

core/types/transaction_signing.go

@@ -132,6 +132,7 @@ func (s EIP155Signer) Sender(tx InternalTransaction) (common.Address, error) {
 	if !tx.Protected() {
 		return HomesteadSigner{}.Sender(tx)
 	}
+
 	if tx.ChainID().Cmp(s.chainID) != 0 {
 		return common.Address{}, ErrInvalidChainID
 	}
@@ -157,6 +158,18 @@ func (s EIP155Signer) SignatureValues(tx InternalTransaction, sig []byte) (R, S,
 // Hash returns the hash to be signed by the sender.
 // It does not uniquely identify the transaction.
 func (s EIP155Signer) Hash(tx InternalTransaction) common.Hash {
+	if params.IsEthCompatible(s.chainID) {
+		// following the same logic as in go-eth implementation
+		return hash.FromRLP([]interface{}{
+			tx.Nonce(),
+			tx.GasPrice(),
+			tx.GasLimit(),
+			tx.To(),
+			tx.Value(),
+			tx.Data(),
+			s.chainID, uint(0), uint(0),
+		})
+	}
 	return hash.FromRLP([]interface{}{
 		tx.Nonce(),
 		tx.GasPrice(),

core/types/transaction_test.go

@@ -53,7 +53,7 @@ func TestTransactionPriceNonceSort(t *testing.T) {
 		}
 	}
 	// Sort the transactions and cross check the nonce ordering
-	txset := NewTransactionsByPriceAndNonce(signer, groups)
+	txset := NewTransactionsByPriceAndNonce(signer, signer, groups)
 
 	txs := InternalTransactions{}
 	for tx := txset.Peek(); tx != nil; tx = txset.Peek() {

core/vm/eips.go

@@ -81,6 +81,7 @@ func enable1344(jt *JumpTable) {
 
 // opChainID implements CHAINID opcode
 func opChainID(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
+	// TODO: CHAINID - add fork (or a new opcode) to use ethereum compatible chainID
 	chainID := interpreter.intPool.get().Set(interpreter.evm.chainConfig.ChainID)
 	stack.push(chainID)
 	return nil, nil

core/vm/runtime/runtime.go

@@ -54,6 +54,7 @@ func setDefaults(cfg *Config) {
 	if cfg.ChainConfig == nil {
 		cfg.ChainConfig = &params.ChainConfig{
 			ChainID:              big.NewInt(1),
+			EthCompatibleChainID: params.EthMainnetChainID,
 			CrossTxEpoch:         new(big.Int),
 			CrossLinkEpoch:       new(big.Int),
 			EIP155Epoch:          new(big.Int),

hmy/hmy.go

@@ -55,6 +55,8 @@ type Harmony struct {
 	NodeAPI      NodeAPI
 	// ChainID is used to identify which network we are using
 	ChainID uint64
+	// EthCompatibleChainID is used to identify the Ethereum compatible chain ID
+	EthChainID uint64
 	// RPCGasCap is the global gas cap for eth-call variants.
 	RPCGasCap *big.Int `toml:",omitempty"`
 	ShardID   uint32
@@ -130,6 +132,7 @@ func New(
 		chainDb:                     chainDb,
 		NodeAPI:                     nodeAPI,
 		ChainID:                     nodeAPI.Blockchain().Config().ChainID.Uint64(),
+		EthChainID:                  nodeAPI.Blockchain().Config().EthCompatibleChainID.Uint64(),
 		ShardID:                     shardID,
 		leaderCache:                 leaderCache,
 		totalStakeCache:             totalStakeCache,

hmy/tracer.go

@@ -162,10 +162,15 @@ func (hmy *Harmony) TraceChain(ctx context.Context, start, end *types.Block, con
 
 			// Fetch and execute the next block trace tasks
 			for task := range tasks {
-				signer := types.MakeSigner(hmy.BlockChain.Config(), task.block.Number())
+				hmySigner := types.MakeSigner(hmy.BlockChain.Config(), task.block.Number())
+				ethSigner := types.NewEIP155Signer(hmy.BlockChain.Config().EthCompatibleChainID)
 
 				// Trace all the transactions contained within
 				for i, tx := range task.block.Transactions() {
+					signer := hmySigner
+					if tx.IsEthCompatible() {
+						signer = ethSigner
+					}
 					msg, _ := tx.AsMessage(signer)
 					vmCtx := core.NewEVMContext(msg, task.block.Header(), hmy.BlockChain, nil)
 
@@ -359,8 +364,8 @@ func (hmy *Harmony) TraceBlock(ctx context.Context, block *types.Block, config *
 	}
 	// Execute all the transaction contained within the block concurrently
 	var (
-		signer = types.MakeSigner(hmy.BlockChain.Config(), block.Number())
-
+		hmySigner = types.MakeSigner(hmy.BlockChain.Config(), block.Number())
+		ethSigner = types.NewEIP155Signer(hmy.BlockChain.Config().EthCompatibleChainID)
 		txs       = block.Transactions()
 		results   = make([]*TxTraceResult, len(txs))
 
@@ -378,6 +383,11 @@ func (hmy *Harmony) TraceBlock(ctx context.Context, block *types.Block, config *
 
 			// Fetch and execute the next transaction trace tasks
 			for task := range jobs {
+				signer := hmySigner
+				if txs[task.index].IsEthCompatible() {
+					signer = ethSigner
+				}
+
 				msg, _ := txs[task.index].AsMessage(signer)
 				vmctx := core.NewEVMContext(msg, block.Header(), hmy.BlockChain, nil)
 
@@ -396,6 +406,10 @@ func (hmy *Harmony) TraceBlock(ctx context.Context, block *types.Block, config *
 		// Send the trace task over for execution
 		jobs <- &txTraceTask{statedb: statedb.Copy(), index: i}
 
+		signer := hmySigner
+		if tx.IsEthCompatible() {
+			signer = ethSigner
+		}
 		// Generate the next state snapshot fast without tracing
 		msg, _ := tx.AsMessage(signer)
 		vmctx := core.NewEVMContext(msg, block.Header(), hmy.BlockChain, nil)
@@ -459,10 +473,15 @@ func (hmy *Harmony) standardTraceBlockToFile(ctx context.Context, block *types.B
 
 	// Execute transaction, either tracing all or just the requested one
 	var (
-		signer = types.MakeSigner(hmy.BlockChain.Config(), block.Number())
+		hmySigner = types.MakeSigner(hmy.BlockChain.Config(), block.Number())
+		ethSigner = types.NewEIP155Signer(hmy.BlockChain.Config().EthCompatibleChainID)
 		dumps     []string
 	)
 	for i, tx := range block.Transactions() {
+		signer := hmySigner
+		if tx.IsEthCompatible() {
+			signer = ethSigner
+		}
 		// Prepare the transaction for un-traced execution
 		var (
 			msg, _ = tx.AsMessage(signer)
@@ -685,9 +704,15 @@ func (hmy *Harmony) ComputeTxEnv(block *types.Block, txIndex int, reexec uint64)
 	}
 
 	// Recompute transactions up to the target index.
-	signer := types.MakeSigner(hmy.BlockChain.Config(), block.Number())
+	hmySigner := types.MakeSigner(hmy.BlockChain.Config(), block.Number())
+	ethSigner := types.NewEIP155Signer(hmy.BlockChain.Config().EthCompatibleChainID)
 
 	for idx, tx := range block.Transactions() {
+		signer := hmySigner
+		if tx.IsEthCompatible() {
+			signer = ethSigner
+		}
+
 		// Assemble the transaction call message and return if the requested offset
 		msg, _ := tx.AsMessage(signer)
 		context := core.NewEVMContext(msg, block.Header(), hmy.BlockChain, nil)

internal/params/config.go

@@ -3,6 +3,7 @@ package params
 import (
 	"fmt"
 	"math/big"
+	"sync"
 
 	"github.com/ethereum/go-ethereum/common"
 )
@@ -16,16 +17,27 @@ var (
 	StressnetChainID          = big.NewInt(5)
 	TestChainID               = big.NewInt(99)  // not a real network
 	AllProtocolChangesChainID = big.NewInt(100) // not a real network
+
+	// EthMainnetChainID to be reserved unique chain ID for eth compatible chains.
+	EthMainnetChainID            = big.NewInt(1666600000)
+	EthTestnetChainID            = big.NewInt(1666700000)
+	EthPangaeaChainID            = big.NewInt(1666800000)
+	EthPartnerChainID            = big.NewInt(1666900000)
+	EthStressnetChainID          = big.NewInt(1661000000)
+	EthTestChainID               = big.NewInt(1661100000) // not a real network
+	EthAllProtocolChangesChainID = big.NewInt(1661200000) // not a real network
 )
 
 // EpochTBD is a large, “not anytime soon” epoch.  It used as a placeholder
 // until the exact epoch is decided.
 var EpochTBD = big.NewInt(10000000)
+var once sync.Once
 
 var (
 	// MainnetChainConfig is the chain parameters to run a node on the main network.
 	MainnetChainConfig = &ChainConfig{
 		ChainID:              MainnetChainID,
+		EthCompatibleChainID: EthMainnetChainID,
 		CrossTxEpoch:         big.NewInt(28),
 		CrossLinkEpoch:       big.NewInt(186),
 		StakingEpoch:         big.NewInt(186),
@@ -43,6 +55,7 @@ var (
 	// TestnetChainConfig contains the chain parameters to run a node on the harmony test network.
 	TestnetChainConfig = &ChainConfig{
 		ChainID:              TestnetChainID,
+		EthCompatibleChainID: EthTestnetChainID,
 		CrossTxEpoch:         big.NewInt(0),
 		CrossLinkEpoch:       big.NewInt(2),
 		StakingEpoch:         big.NewInt(2),
@@ -61,6 +74,7 @@ var (
 	// All features except for CrossLink are enabled at launch.
 	PangaeaChainConfig = &ChainConfig{
 		ChainID:              PangaeaChainID,
+		EthCompatibleChainID: EthPangaeaChainID,
 		CrossTxEpoch:         big.NewInt(0),
 		CrossLinkEpoch:       big.NewInt(2),
 		StakingEpoch:         big.NewInt(2),
@@ -79,6 +93,7 @@ var (
 	// All features except for CrossLink are enabled at launch.
 	PartnerChainConfig = &ChainConfig{
 		ChainID:              PartnerChainID,
+		EthCompatibleChainID: EthPartnerChainID,
 		CrossTxEpoch:         big.NewInt(0),
 		CrossLinkEpoch:       big.NewInt(2),
 		StakingEpoch:         big.NewInt(2),
@@ -97,6 +112,7 @@ var (
 	// All features except for CrossLink are enabled at launch.
 	StressnetChainConfig = &ChainConfig{
 		ChainID:              StressnetChainID,
+		EthCompatibleChainID: EthStressnetChainID,
 		CrossTxEpoch:         big.NewInt(0),
 		CrossLinkEpoch:       big.NewInt(2),
 		StakingEpoch:         big.NewInt(2),
@@ -114,6 +130,7 @@ var (
 	// LocalnetChainConfig contains the chain parameters to run for local development.
 	LocalnetChainConfig = &ChainConfig{
 		ChainID:              TestnetChainID,
+		EthCompatibleChainID: EthTestnetChainID,
 		CrossTxEpoch:         big.NewInt(0),
 		CrossLinkEpoch:       big.NewInt(2),
 		StakingEpoch:         big.NewInt(2),
@@ -133,6 +150,7 @@ var (
 	// adding flags to the config to also have to set these fields.
 	AllProtocolChanges = &ChainConfig{
 		AllProtocolChangesChainID,    // ChainID
+		EthAllProtocolChangesChainID, // EthCompatibleChainID
 		big.NewInt(0),                // CrossTxEpoch
 		big.NewInt(0),                // CrossLinkEpoch
 		big.NewInt(0),                // StakingEpoch
@@ -152,6 +170,7 @@ var (
 	// adding flags to the config to also have to set these fields.
 	TestChainConfig = &ChainConfig{
 		TestChainID,    // ChainID
+		EthTestChainID, // EthCompatibleChainID
 		big.NewInt(0),  // CrossTxEpoch
 		big.NewInt(0),  // CrossLinkEpoch
 		big.NewInt(0),  // StakingEpoch
@@ -191,6 +210,9 @@ type ChainConfig struct {
 	// ChainId identifies the current chain and is used for replay protection
 	ChainID *big.Int `json:"chain-id"`
 
+	// EthCompatibleChainID identifies the chain id used for ethereum compatible transactions
+	EthCompatibleChainID *big.Int `json:"eth-compatible-chain-id"`
+
 	// CrossTxEpoch is the epoch where cross-shard transaction starts being
 	// processed.
 	CrossTxEpoch *big.Int `json:"cross-tx-epoch,omitempty"`
@@ -235,8 +257,9 @@ type ChainConfig struct {
 
 // String implements the fmt.Stringer interface.
 func (c *ChainConfig) String() string {
-	return fmt.Sprintf("{ChainID: %v EIP155: %v CrossTx: %v Staking: %v CrossLink: %v ReceiptLog: %v}",
+	return fmt.Sprintf("{ChainID: %v EthCompatibleChainID: %v EIP155: %v CrossTx: %v Staking: %v CrossLink: %v ReceiptLog: %v}",
 		c.ChainID,
+		c.EthCompatibleChainID,
 		c.EIP155Epoch,
 		c.CrossTxEpoch,
 		c.StakingEpoch,
@@ -320,6 +343,25 @@ func (c *ChainConfig) IsReceiptLog(epoch *big.Int) bool {
 	return isForked(c.ReceiptLogEpoch, epoch)
 }
 
+// UpdateEthChainIDByShard update the ethChainID based on shard ID.
+func UpdateEthChainIDByShard(shardID uint32) {
+	once.Do(func() {
+		MainnetChainConfig.EthCompatibleChainID.Add(MainnetChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		TestnetChainConfig.EthCompatibleChainID.Add(TestnetChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		PangaeaChainConfig.EthCompatibleChainID.Add(PangaeaChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		PartnerChainConfig.EthCompatibleChainID.Add(PartnerChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		StressnetChainConfig.EthCompatibleChainID.Add(StressnetChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		LocalnetChainConfig.EthCompatibleChainID.Add(LocalnetChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		AllProtocolChanges.EthCompatibleChainID.Add(AllProtocolChanges.EthCompatibleChainID, big.NewInt(int64(shardID)))
+		TestChainConfig.EthCompatibleChainID.Add(TestChainConfig.EthCompatibleChainID, big.NewInt(int64(shardID)))
+	})
+}
+
+// IsEthCompatible returns whether the chainID is for ethereum compatible txn or not
+func IsEthCompatible(chainID *big.Int) bool {
+	return chainID.Cmp(EthMainnetChainID) >= 0
+}
+
 // GasTable returns the gas table corresponding to the current phase (homestead or homestead reprice).
 //
 // The returned GasTable's fields shouldn't, under any circumstances, be changed.
@@ -350,6 +392,7 @@ func isForked(s, epoch *big.Int) bool {
 // phases.
 type Rules struct {
 	ChainID                                               *big.Int
+	EthChainID                                            *big.Int
 	IsCrossLink, IsEIP155, IsS3, IsReceiptLog, IsIstanbul bool
 }
 
@@ -359,8 +402,13 @@ func (c *ChainConfig) Rules(epoch *big.Int) Rules {
 	if chainID == nil {
 		chainID = new(big.Int)
 	}
+	ethChainID := c.EthCompatibleChainID
+	if ethChainID == nil {
+		ethChainID = new(big.Int)
+	}
 	return Rules{
 		ChainID:      new(big.Int).Set(chainID),
+		EthChainID:   new(big.Int).Set(ethChainID),
 		IsCrossLink:  c.IsCrossLink(epoch),
 		IsEIP155:     c.IsEIP155(epoch),
 		IsS3:         c.IsS3(epoch),

node/worker/worker.go

@@ -34,6 +34,7 @@ import (
 // environment is the worker's current environment and holds all of the current state information.
 type environment struct {
 	signer     types.Signer
+	ethSigner  types.Signer
 	state      *state.DB     // apply state changes here
 	gasPool    *core.GasPool // available gas used to pack transactions
 	header     *block.Header
@@ -76,7 +77,11 @@ func (w *Worker) CommitSortedTransactions(
 		// Error may be ignored here. The error has already been checked
 		// during transaction acceptance is the transaction pool.
 		// We use the eip155 signer regardless of the current hf.
-		from, _ := types.Sender(w.current.signer, tx)
+		signer := w.current.signer
+		if tx.IsEthCompatible() {
+			signer = w.current.ethSigner
+		}
+		from, _ := types.Sender(signer, tx)
 		// Check whether the tx is replay protected. If we're not in the EIP155 hf
 		// phase, start ignoring the sender until we do.
 		if tx.Protected() && !w.config.IsEIP155(w.current.header.Epoch()) {
@@ -92,7 +97,7 @@ func (w *Worker) CommitSortedTransactions(
 
 		// Start executing the transaction
 		w.current.state.Prepare(tx.Hash(), common.Hash{}, len(w.current.txs))
-		_, err := w.commitTransaction(tx.(*types.Transaction), coinbase)
+		_, err := w.commitTransaction(tx, coinbase)
 
 		sender, _ := common2.AddressToBech32(from)
 		switch err {
@@ -134,7 +139,7 @@ func (w *Worker) CommitTransactions(
 	}
 
 	// HARMONY TXNS
-	normalTxns := types.NewTransactionsByPriceAndNonce(w.current.signer, pendingNormal)
+	normalTxns := types.NewTransactionsByPriceAndNonce(w.current.signer, w.current.ethSigner, pendingNormal)
 	w.CommitSortedTransactions(normalTxns, coinbase)
 
 	// STAKING - only beaconchain process staking transaction
@@ -301,6 +306,7 @@ func (w *Worker) makeCurrent(parent *types.Block, header *block.Header) error {
 	}
 	env := &environment{
 		signer:    types.NewEIP155Signer(w.config.ChainID),
+		ethSigner: types.NewEIP155Signer(w.config.EthCompatibleChainID),
 		state:     state,
 		header:    header,
 	}

staking/types/transaction.go

@@ -259,6 +259,11 @@ func (tx *StakingTransaction) Size() common.StorageSize {
 	return common.StorageSize(c)
 }
 
+// IsEthCompatible returns whether the txn is ethereum compatible
+func (tx *StakingTransaction) IsEthCompatible() bool {
+	return false
+}
+
 type writeCounter common.StorageSize
 
 func (c *writeCounter) Write(b []byte) (int, error) {