Revert tx logic to use embedded txs with dedicated addr

handlers/ante.go

@@ -9,8 +9,6 @@ import (
 
 	"github.com/cosmos/ethermint/types"
 	ethcmn "github.com/ethereum/go-ethereum/common"
-
-	ethtypes "github.com/ethereum/go-ethereum/core/types"
 )
 
 const (
@@ -39,7 +37,7 @@ func AnteHandler(am auth.AccountMapper, _ auth.FeeCollectionKeeper) sdk.AnteHand
 
 		switch tx := tx.(type) {
 		case types.Transaction:
-			gasLimit = int64(tx.Data.GasLimit)
+			gasLimit = int64(tx.Data().GasLimit)
 			handler = handleEthTx
 		case auth.StdTx:
 			gasLimit = tx.Fee.Gas
@@ -91,16 +89,28 @@ func handleEthTx(sdkCtx sdk.Context, tx sdk.Tx, am auth.AccountMapper) (sdk.Cont
 		return sdkCtx, sdk.ErrInternal(fmt.Sprintf("invalid chainID: %s", sdkCtx.ChainID())).Result(), true
 	}
 
-	// validate signature
+	sdkCtx.GasMeter().ConsumeGas(verifySigCost, "ante: verify Ethereum signature")
-	gethTx := ethTx.ConvertTx(chainID)
-	signer := ethtypes.NewEIP155Signer(chainID)
 
-	_, err := signer.Sender(&gethTx)
+	addr, err := ethTx.VerifySig(chainID)
 	if err != nil {
 		return sdkCtx, sdk.ErrUnauthorized("signature verification failed").Result(), true
 	}
 
-	return sdkCtx, sdk.Result{GasWanted: int64(ethTx.Data.GasLimit)}, false
+	acc := am.GetAccount(sdkCtx, addr.Bytes())
+
+	// validate the account nonce (referred to as sequence in the AccountMapper)
+	seq := acc.GetSequence()
+	if ethTx.Data().AccountNonce != uint64(seq) {
+		return sdkCtx, sdk.ErrInvalidSequence(fmt.Sprintf("invalid account nonce; expected: %d", seq)).Result(), true
+	}
+
+	err = acc.SetSequence(seq + 1)
+	if err != nil {
+		return sdkCtx, sdk.ErrInternal(err.Error()).Result(), true
+	}
+
+	am.SetAccount(sdkCtx, acc)
+	return sdkCtx, sdk.Result{GasWanted: int64(ethTx.Data().GasLimit)}, false
 }
 
 // handleEmbeddedTx implements an ante handler for an SDK transaction. It
@@ -122,15 +132,15 @@ func handleEmbeddedTx(sdkCtx sdk.Context, tx sdk.Tx, am auth.AccountMapper) (sdk
 	for i, sig := range stdTx.Signatures {
 		signer := ethcmn.BytesToAddress(signerAddrs[i].Bytes())
 
-		signerAcc, err := validateSignature(sdkCtx, stdTx, signer, sig, am)
+		acc, err := validateSignature(sdkCtx, stdTx, signer, sig, am)
 		if err.Code() != sdk.CodeOK {
-			return sdkCtx, err.Result(), false
+			return sdkCtx, err.Result(), true
 		}
 
 		// TODO: Fees!
 
-		am.SetAccount(sdkCtx, signerAcc)
+		am.SetAccount(sdkCtx, acc)
-		signerAccs[i] = signerAcc
+		signerAccs[i] = acc
 	}
 
 	newCtx := auth.WithSigners(sdkCtx, signerAccs)

types/test_common.go

@@ -0,0 +1,121 @@
+// nolint
+package types
+
+import (
+	"crypto/ecdsa"
+	"math/big"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/wire"
+	"github.com/cosmos/cosmos-sdk/x/auth"
+	ethcmn "github.com/ethereum/go-ethereum/common"
+	ethtypes "github.com/ethereum/go-ethereum/core/types"
+	ethcrypto "github.com/ethereum/go-ethereum/crypto"
+)
+
+var (
+	TestSDKAddr = GenerateEthAddress()
+	TestChainID = big.NewInt(3)
+
+	TestPrivKey1, _ = ethcrypto.GenerateKey()
+	TestPrivKey2, _ = ethcrypto.GenerateKey()
+
+	TestAddr1 = PrivKeyToEthAddress(TestPrivKey1)
+	TestAddr2 = PrivKeyToEthAddress(TestPrivKey2)
+)
+
+func NewTestCodec() *wire.Codec {
+	codec := wire.NewCodec()
+
+	RegisterWire(codec)
+	auth.RegisterWire(codec)
+	wire.RegisterCrypto(codec)
+	codec.RegisterConcrete(&sdk.TestMsg{}, "test/TestMsg", nil)
+
+	return codec
+}
+
+func NewTestStdFee() auth.StdFee {
+	return auth.NewStdFee(5000, sdk.NewCoin("photon", sdk.NewInt(150)))
+}
+
+func NewTestStdTx(
+	chainID *big.Int, msgs []sdk.Msg, accNums []int64, seqs []int64, pKeys []*ecdsa.PrivateKey, fee auth.StdFee,
+) sdk.Tx {
+
+	sigs := make([]auth.StdSignature, len(pKeys))
+
+	for i, priv := range pKeys {
+		signBytes := GetStdTxSignBytes(chainID.String(), accNums[i], seqs[i], NewTestStdFee(), msgs, "")
+
+		sig, err := ethcrypto.Sign(signBytes, priv)
+		if err != nil {
+			panic(err)
+		}
+
+		sigs[i] = auth.StdSignature{Signature: sig, AccountNumber: accNums[i], Sequence: seqs[i]}
+	}
+
+	return auth.NewStdTx(msgs, fee, sigs, "")
+}
+
+func NewTestGethTxs(
+	chainID *big.Int, seqs []int64, addrs []ethcmn.Address, pKeys []*ecdsa.PrivateKey,
+) []*ethtypes.Transaction {
+
+	txs := make([]*ethtypes.Transaction, len(pKeys))
+
+	for i, privKey := range pKeys {
+		ethTx := ethtypes.NewTransaction(
+			uint64(seqs[i]), addrs[i], big.NewInt(10), 1000, big.NewInt(100), []byte{},
+		)
+
+		signer := ethtypes.NewEIP155Signer(chainID)
+
+		ethTx, err := ethtypes.SignTx(ethTx, signer, privKey)
+		if err != nil {
+			panic(err)
+		}
+
+		txs[i] = ethTx
+	}
+
+	return txs
+}
+
+func NewTestEthTxs(
+	chainID *big.Int, seqs []int64, addrs []ethcmn.Address, pKeys []*ecdsa.PrivateKey,
+) []*Transaction {
+
+	txs := make([]*Transaction, len(pKeys))
+
+	for i, privKey := range pKeys {
+		ethTx := NewTransaction(
+			uint64(seqs[i]), addrs[i], big.NewInt(10), 1000, big.NewInt(100), []byte{},
+		)
+
+		ethTx.Sign(chainID, privKey)
+		txs[i] = ethTx
+	}
+
+	return txs
+}
+
+func NewTestSDKTxs(
+	codec *wire.Codec, chainID *big.Int, to ethcmn.Address, msgs []sdk.Msg,
+	accNums []int64, seqs []int64, pKeys []*ecdsa.PrivateKey, fee auth.StdFee,
+) []*Transaction {
+
+	txs := make([]*Transaction, len(pKeys))
+	stdTx := NewTestStdTx(chainID, msgs, accNums, seqs, pKeys, fee)
+	payload := codec.MustMarshalBinary(stdTx)
+
+	for i, privKey := range pKeys {
+		ethTx := NewTransaction(uint64(seqs[i]), to, big.NewInt(10), 1000, big.NewInt(100), payload)
+
+		ethTx.Sign(chainID, privKey)
+		txs[i] = ethTx
+	}
+
+	return txs
+}

types/tx.go

@@ -1,8 +1,10 @@
 package types
 
 import (
+	"bytes"
 	"crypto/ecdsa"
 	"fmt"
+	"io"
 	"math/big"
 	"sync/atomic"
 
@@ -13,17 +15,20 @@ import (
 	ethcrypto "github.com/ethereum/go-ethereum/crypto"
 	ethsha "github.com/ethereum/go-ethereum/crypto/sha3"
 	"github.com/ethereum/go-ethereum/rlp"
-
 	"github.com/pkg/errors"
 )
 
-var _ sdk.Tx = (*Transaction)(nil)
-
 const (
 	// TypeTxEthereum reflects an Ethereum Transaction type.
 	TypeTxEthereum = "Ethereum"
 )
 
+// ----------------------------------------------------------------------------
+// Ethereum transaction
+// ----------------------------------------------------------------------------
+
+var _ sdk.Tx = (*Transaction)(nil)
+
 type (
 	// Transaction implements the Ethereum transaction structure as an exact
 	// replica. It implements the Cosmos sdk.Tx interface. Due to the private
@@ -33,7 +38,7 @@ type (
 	// Note: The transaction also implements the sdk.Msg interface to perform
 	// basic validation that is done in the BaseApp.
 	Transaction struct {
-		Data TxData
+		data TxData
 
 		// caches
 		hash atomic.Value
@@ -41,96 +46,136 @@ type (
 		from atomic.Value
 	}
 
-	// TxData defines internal Ethereum transaction information
+	// TxData implements the Ethereum transaction data structure as an exact
+	// copy. It is used solely as intended in Ethereum abiding by the protocol
+	// except for the payload field which may embed a Cosmos SDK transaction.
 	TxData struct {
 		AccountNonce uint64          `json:"nonce"`
-		Price        sdk.Int         `json:"gasPrice"`
+		Price        *big.Int        `json:"gasPrice"`
 		GasLimit     uint64          `json:"gas"`
-		Recipient    *ethcmn.Address `json:"to"` // nil means contract creation
+		Recipient    *ethcmn.Address `json:"to" rlp:"nil"` // nil means contract creation
-		Amount       sdk.Int         `json:"value"`
+		Amount       *big.Int        `json:"value"`
 		Payload      []byte          `json:"input"`
-		Signature    *EthSignature   `json:"signature"`
+
+		// signature values
+		V *big.Int `json:"v"`
+		R *big.Int `json:"r"`
+		S *big.Int `json:"s"`
 
 		// hash is only used when marshaling to JSON
-		Hash *ethcmn.Hash `json:"hash"`
+		Hash *ethcmn.Hash `json:"hash" rlp:"-"`
 	}
 
-	// EthSignature reflects an Ethereum signature. We wrap this in a structure
+	// sigCache is used to cache the derived sender and contains the signer used
-	// to support Amino serialization of transactions.
+	// to derive it.
-	EthSignature struct {
+	sigCache struct {
-		v, r, s *big.Int
+		signer ethtypes.Signer
+		from   ethcmn.Address
 	}
 )
 
-// NewEthSignature returns a new instantiated Ethereum signature.
+// NewTransaction returns a reference to a new Ethereum transaction.
-func NewEthSignature(v, r, s *big.Int) *EthSignature {
-	return &EthSignature{v, r, s}
-}
-
-func (es *EthSignature) sanitize() {
-	if es.v == nil {
-		es.v = new(big.Int)
-	}
-	if es.r == nil {
-		es.r = new(big.Int)
-	}
-	if es.s == nil {
-		es.s = new(big.Int)
-	}
-}
-
-// MarshalAmino defines a custom encoding scheme for a EthSignature.
-func (es EthSignature) MarshalAmino() ([3]string, error) {
-	es.sanitize()
-	return ethSigMarshalAmino(es)
-}
-
-// UnmarshalAmino defines a custom decoding scheme for a EthSignature.
-func (es *EthSignature) UnmarshalAmino(raw [3]string) error {
-	es.sanitize()
-	return ethSigUnmarshalAmino(es, raw)
-}
-
-// NewTransaction mimics ethereum's NewTransaction function. It returns a
-// reference to a new Ethereum Transaction.
 func NewTransaction(
-	nonce uint64, to ethcmn.Address, amount sdk.Int,
+	nonce uint64, to ethcmn.Address, amount *big.Int, gasLimit uint64, gasPrice *big.Int, payload []byte,
-	gasLimit uint64, gasPrice sdk.Int, payload []byte,
+) *Transaction {
-) Transaction {
+
+	return newTransaction(nonce, &to, amount, gasLimit, gasPrice, payload)
+}
+
+// NewContractCreation returns a reference to a new Ethereum transaction
+// designated for contract creation.
+func NewContractCreation(
+	nonce uint64, amount *big.Int, gasLimit uint64, gasPrice *big.Int, payload []byte,
+) *Transaction {
+
+	return newTransaction(nonce, nil, amount, gasLimit, gasPrice, payload)
+}
+
+func newTransaction(
+	nonce uint64, to *ethcmn.Address, amount *big.Int,
+	gasLimit uint64, gasPrice *big.Int, payload []byte,
+) *Transaction {
 
 	if len(payload) > 0 {
 		payload = ethcmn.CopyBytes(payload)
 	}
 
 	txData := TxData{
-		Recipient:    &to,
 		AccountNonce: nonce,
+		Recipient:    to,
 		Payload:      payload,
 		GasLimit:     gasLimit,
-		Amount:       amount,
+		Amount:       new(big.Int),
-		Price:        gasPrice,
+		Price:        new(big.Int),
-		Signature:    NewEthSignature(new(big.Int), new(big.Int), new(big.Int)),
+		V:            new(big.Int),
+		R:            new(big.Int),
+		S:            new(big.Int),
 	}
 
-	return Transaction{Data: txData}
+	if amount != nil {
+		txData.Amount.Set(amount)
+	}
+	if gasPrice != nil {
+		txData.Price.Set(gasPrice)
+	}
+
+	return &Transaction{data: txData}
+}
+
+// Data returns the Transaction's data.
+func (tx Transaction) Data() TxData {
+	return tx.data
+}
+
+// EncodeRLP implements the rlp.Encoder interface.
+func (tx *Transaction) EncodeRLP(w io.Writer) error {
+	return rlp.Encode(w, &tx.data)
+}
+
+// DecodeRLP implements the rlp.Decoder interface.
+func (tx *Transaction) DecodeRLP(s *rlp.Stream) error {
+	_, size, _ := s.Kind()
+	err := s.Decode(&tx.data)
+	if err == nil {
+		tx.size.Store(ethcmn.StorageSize(rlp.ListSize(size)))
+	}
+
+	return err
+}
+
+// Hash hashes the RLP encoding of a transaction.
+func (tx *Transaction) Hash() ethcmn.Hash {
+	if hash := tx.hash.Load(); hash != nil {
+		return hash.(ethcmn.Hash)
+	}
+
+	v := rlpHash(tx)
+	tx.hash.Store(v)
+	return v
+}
+
+// SigHash returns the RLP hash of a transaction with a given chainID used for
+// signing.
+func (tx Transaction) SigHash(chainID *big.Int) ethcmn.Hash {
+	return rlpHash([]interface{}{
+		tx.data.AccountNonce,
+		tx.data.Price,
+		tx.data.GasLimit,
+		tx.data.Recipient,
+		tx.data.Amount,
+		tx.data.Payload,
+		chainID, uint(0), uint(0),
+	})
 }
 
 // Sign calculates a secp256k1 ECDSA signature and signs the transaction. It
 // takes a private key and chainID to sign an Ethereum transaction according to
 // EIP155 standard. It mutates the transaction as it populates the V, R, S
 // fields of the Transaction's Signature.
-func (tx *Transaction) Sign(chainID sdk.Int, priv *ecdsa.PrivateKey) {
+func (tx *Transaction) Sign(chainID *big.Int, priv *ecdsa.PrivateKey) {
-	h := rlpHash([]interface{}{
+	txHash := tx.SigHash(chainID)
-		tx.Data.AccountNonce,
-		tx.Data.Price.BigInt(),
-		tx.Data.GasLimit,
-		tx.Data.Recipient,
-		tx.Data.Amount.BigInt(),
-		tx.Data.Payload,
-		chainID.BigInt(), uint(0), uint(0),
-	})
 
-	sig, err := ethcrypto.Sign(h[:], priv)
+	sig, err := ethcrypto.Sign(txHash[:], priv)
 	if err != nil {
 		panic(err)
 	}
@@ -147,13 +192,48 @@ func (tx *Transaction) Sign(chainID sdk.Int, priv *ecdsa.PrivateKey) {
 		v = new(big.Int).SetBytes([]byte{sig[64] + 27})
 	} else {
 		v = big.NewInt(int64(sig[64] + 35))
-		chainIDMul := new(big.Int).Mul(chainID.BigInt(), big.NewInt(2))
+		chainIDMul := new(big.Int).Mul(chainID, big.NewInt(2))
 		v.Add(v, chainIDMul)
 	}
 
-	tx.Data.Signature.v = v
+	tx.data.V = v
-	tx.Data.Signature.r = r
+	tx.data.R = r
-	tx.Data.Signature.s = s
+	tx.data.S = s
+}
+
+// VerifySig attempts to verify a Transaction's signature for a given chainID.
+// A derived address is returned upon success or an error if recovery fails.
+func (tx Transaction) VerifySig(chainID *big.Int) (ethcmn.Address, error) {
+	signer := ethtypes.NewEIP155Signer(chainID)
+
+	if sc := tx.from.Load(); sc != nil {
+		sigCache := sc.(sigCache)
+		// If the signer used to derive from in a previous
+		// call is not the same as used current, invalidate
+		// the cache.
+		if sigCache.signer.Equal(signer) {
+			return sigCache.from, nil
+		}
+	}
+
+	// do not allow recovery for transactions with an unprotected chainID
+	if chainID.Sign() == 0 {
+		return ethcmn.Address{}, errors.New("invalid chainID")
+	}
+
+	txHash := tx.SigHash(chainID)
+	sig := recoverEthSig(tx.data.R, tx.data.S, tx.data.V, chainID)
+
+	pub, err := ethcrypto.Ecrecover(txHash[:], sig)
+	if err != nil {
+		return ethcmn.Address{}, err
+	}
+
+	var addr ethcmn.Address
+	copy(addr[:], ethcrypto.Keccak256(pub[1:])[12:])
+
+	tx.from.Store(sigCache{signer: signer, from: addr})
+	return addr, nil
 }
 
 // Type implements the sdk.Msg interface. It returns the type of the
@@ -165,11 +245,11 @@ func (tx Transaction) Type() string {
 // ValidateBasic implements the sdk.Msg interface. It performs basic validation
 // checks of a Transaction. If returns an sdk.Error if validation fails.
 func (tx Transaction) ValidateBasic() sdk.Error {
-	if tx.Data.Price.Sign() != 1 {
+	if tx.data.Price.Sign() != 1 {
 		return ErrInvalidValue(DefaultCodespace, "price must be positive")
 	}
 
-	if tx.Data.Amount.Sign() != 1 {
+	if tx.data.Amount.Sign() != 1 {
 		return ErrInvalidValue(DefaultCodespace, "amount must be positive")
 	}
 
@@ -192,44 +272,57 @@ func (tx Transaction) GetMsgs() []sdk.Msg {
 	return []sdk.Msg{tx}
 }
 
-// ConvertTx attempts to converts a Transaction to a new Ethereum transaction
+// hasEmbeddedTx returns a boolean reflecting if the transaction contains an
-// with the signature set. The signature if first recovered and then a new
+// SDK transaction or not based on the recipient address.
-// Transaction is created with that signature. If setting the signature fails,
+func (tx Transaction) hasEmbeddedTx(addr ethcmn.Address) bool {
-// a panic will be triggered.
+	return bytes.Equal(tx.data.Recipient.Bytes(), addr.Bytes())
-//
-// TODO: To be removed in #470
-func (tx Transaction) ConvertTx(chainID *big.Int) ethtypes.Transaction {
-	gethTx := ethtypes.NewTransaction(
-		tx.Data.AccountNonce, *tx.Data.Recipient, tx.Data.Amount.BigInt(),
-		tx.Data.GasLimit, tx.Data.Price.BigInt(), tx.Data.Payload,
-	)
-
-	sig := recoverEthSig(tx.Data.Signature, chainID)
-	signer := ethtypes.NewEIP155Signer(chainID)
-
-	gethTx, err := gethTx.WithSignature(signer, sig)
-	if err != nil {
-		panic(errors.Wrap(err, "failed to convert transaction with a given signature"))
-	}
-
-	return *gethTx
 }
 
-// TxDecoder returns an sdk.TxDecoder that given raw transaction bytes,
+// GetEmbeddedTx returns the embedded SDK transaction from an Ethereum
-// attempts to decode them into a valid sdk.Tx.
+// transaction. It returns an error if decoding the inner transaction fails.
-func TxDecoder(codec *wire.Codec) sdk.TxDecoder {
+//
+// CONTRACT: The payload field of an Ethereum transaction must contain a valid
+// encoded SDK transaction.
+func (tx Transaction) GetEmbeddedTx(codec *wire.Codec) (sdk.Tx, sdk.Error) {
+	var etx sdk.Tx
+
+	err := codec.UnmarshalBinary(tx.data.Payload, &etx)
+	if err != nil {
+		return etx, sdk.ErrTxDecode("failed to decode embedded transaction")
+	}
+
+	return etx, nil
+}
+
+// ----------------------------------------------------------------------------
+// Utilities
+// ----------------------------------------------------------------------------
+
+// TxDecoder returns an sdk.TxDecoder that given raw transaction bytes and an
+// SDK address, attempts to decode them into a Transaction or an EmbeddedTx or
+// returning an error if decoding fails.
+func TxDecoder(codec *wire.Codec, sdkAddress ethcmn.Address) sdk.TxDecoder {
 	return func(txBytes []byte) (sdk.Tx, sdk.Error) {
+		var tx = Transaction{}
+
 		if len(txBytes) == 0 {
-			return nil, sdk.ErrTxDecode("txBytes are empty")
+			return nil, sdk.ErrTxDecode("transaction bytes are empty")
 		}
 
-		var tx sdk.Tx
+		err := rlp.DecodeBytes(txBytes, &tx)
-
-		// The given codec should have all the appropriate message types
-		// registered.
-		err := codec.UnmarshalBinary(txBytes, &tx)
 		if err != nil {
-			return nil, sdk.ErrTxDecode("failed to decode tx").TraceSDK(err.Error())
+			return nil, sdk.ErrTxDecode("failed to decode transaction").TraceSDK(err.Error())
+		}
+
+		// If the transaction is routed as an SDK transaction, decode and return
+		// the embedded SDK transaction.
+		if tx.hasEmbeddedTx(sdkAddress) {
+			etx, err := tx.GetEmbeddedTx(codec)
+			if err != nil {
+				return nil, err
+			}
+
+			return etx, nil
 		}
 
 		return tx, nil
@@ -237,20 +330,20 @@ func TxDecoder(codec *wire.Codec) sdk.TxDecoder {
 }
 
 // recoverEthSig recovers a signature according to the Ethereum specification.
-func recoverEthSig(es *EthSignature, chainID *big.Int) []byte {
+func recoverEthSig(R, S, Vb, chainID *big.Int) []byte {
 	var v byte
 
-	r, s := es.r.Bytes(), es.s.Bytes()
+	r, s := R.Bytes(), S.Bytes()
 	sig := make([]byte, 65)
 
 	copy(sig[32-len(r):32], r)
 	copy(sig[64-len(s):64], s)
 
 	if chainID.Sign() == 0 {
-		v = byte(es.v.Uint64() - 27)
+		v = byte(Vb.Uint64() - 27)
 	} else {
 		chainIDMul := new(big.Int).Mul(chainID, big.NewInt(2))
-		V := new(big.Int).Sub(es.v, chainIDMul)
+		V := new(big.Int).Sub(Vb, chainIDMul)
 
 		v = byte(V.Uint64() - 35)
 	}
@@ -259,43 +352,11 @@ func recoverEthSig(es *EthSignature, chainID *big.Int) []byte {
 	return sig
 }
 
-func rlpHash(x interface{}) (h ethcmn.Hash) {
+func rlpHash(x interface{}) (hash ethcmn.Hash) {
 	hasher := ethsha.NewKeccak256()
 
 	rlp.Encode(hasher, x)
-	hasher.Sum(h[:0])
+	hasher.Sum(hash[:0])
-
-	return h
-}
-
-func ethSigMarshalAmino(es EthSignature) (raw [3]string, err error) {
-	vb, err := es.v.MarshalText()
-	if err != nil {
-		return raw, err
-	}
-	rb, err := es.r.MarshalText()
-	if err != nil {
-		return raw, err
-	}
-	sb, err := es.s.MarshalText()
-	if err != nil {
-		return raw, err
-	}
-
-	raw[0], raw[1], raw[2] = string(vb), string(rb), string(sb)
-	return raw, err
-}
-
-func ethSigUnmarshalAmino(es *EthSignature, raw [3]string) (err error) {
-	if err = es.v.UnmarshalText([]byte(raw[0])); err != nil {
-		return
-	}
-	if err = es.r.UnmarshalText([]byte(raw[1])); err != nil {
-		return
-	}
-	if err = es.s.UnmarshalText([]byte(raw[2])); err != nil {
-		return
-	}
 
 	return
 }

types/tx_test.go

@@ -3,83 +3,57 @@ package types
 import (
 	"crypto/ecdsa"
 	"fmt"
+	"math/big"
 	"testing"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/cosmos/cosmos-sdk/wire"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 	ethcmn "github.com/ethereum/go-ethereum/common"
-	ethcrypto "github.com/ethereum/go-ethereum/crypto"
+	ethtypes "github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/stretchr/testify/require"
 )
 
-var (
+func TestTransactionRLPEncode(t *testing.T) {
-	testChainID = sdk.NewInt(3)
+	txs := NewTestEthTxs(TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1})
+	gtxs := NewTestGethTxs(TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1})
 
-	testPrivKey1, _ = ethcrypto.GenerateKey()
+	txRLP, err := rlp.EncodeToBytes(txs[0])
-	testPrivKey2, _ = ethcrypto.GenerateKey()
+	require.NoError(t, err)
 
-	testAddr1 = PrivKeyToEthAddress(testPrivKey1)
+	gtxRLP, err := rlp.EncodeToBytes(gtxs[0])
-	testAddr2 = PrivKeyToEthAddress(testPrivKey2)
+	require.NoError(t, err)
-)
 
-func newTestCodec() *wire.Codec {
+	require.Equal(t, gtxRLP, txRLP)
-	codec := wire.NewCodec()
-
-	RegisterWire(codec)
-	codec.RegisterConcrete(auth.StdTx{}, "test/StdTx", nil)
-	codec.RegisterConcrete(&sdk.TestMsg{}, "test/TestMsg", nil)
-	wire.RegisterCrypto(codec)
-
-	return codec
 }
 
-func newStdFee() auth.StdFee {
+func TestTransactionRLPDecode(t *testing.T) {
-	return auth.NewStdFee(5000, sdk.NewCoin("photon", sdk.NewInt(150)))
+	txs := NewTestEthTxs(TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1})
-}
+	gtxs := NewTestGethTxs(TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1})
 
-func newTestStdTx(
+	txRLP, err := rlp.EncodeToBytes(txs[0])
-	chainID sdk.Int, msgs []sdk.Msg, pKeys []*ecdsa.PrivateKey,
+	require.NoError(t, err)
-	accNums []int64, seqs []int64, fee auth.StdFee,
-) sdk.Tx {
 
-	sigs := make([]auth.StdSignature, len(pKeys))
+	gtxRLP, err := rlp.EncodeToBytes(gtxs[0])
+	require.NoError(t, err)
 
-	for i, priv := range pKeys {
+	var (
-		signBytes := GetStdTxSignBytes(chainID.String(), accNums[i], seqs[i], newStdFee(), msgs, "")
+		decodedTx  Transaction
+		decodedGtx ethtypes.Transaction
+	)
 
-		sig, err := ethcrypto.Sign(signBytes, priv)
+	err = rlp.DecodeBytes(txRLP, &decodedTx)
-		if err != nil {
+	require.NoError(t, err)
-			panic(err)
-		}
 
-		sigs[i] = auth.StdSignature{Signature: sig, AccountNumber: accNums[i], Sequence: seqs[i]}
+	err = rlp.DecodeBytes(gtxRLP, &decodedGtx)
-	}
+	require.NoError(t, err)
 
-	return auth.NewStdTx(msgs, fee, sigs, "")
+	require.Equal(t, decodedGtx.Hash(), decodedTx.Hash())
-}
-
-func newTestEthTxs(chainID sdk.Int, pKeys []*ecdsa.PrivateKey, addrs []ethcmn.Address) []Transaction {
-	txs := make([]Transaction, len(pKeys))
-
-	for i, priv := range pKeys {
-		emintTx := NewTransaction(
-			uint64(i), addrs[i], sdk.NewInt(10), 100, sdk.NewInt(100), nil,
-		)
-
-		emintTx.Sign(chainID, priv)
-
-		txs[i] = emintTx
-	}
-
-	return txs
 }
 
 func TestValidation(t *testing.T) {
-	ethTxs := newTestEthTxs(
+	ethTxs := NewTestEthTxs(
-		testChainID,
+		TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1},
-		[]*ecdsa.PrivateKey{testPrivKey1},
-		[]ethcmn.Address{testAddr1},
 	)
 
 	testCases := []struct {
@@ -89,13 +63,13 @@ func TestValidation(t *testing.T) {
 	}{
 		{ethTxs[0], func(msg sdk.Msg) sdk.Msg { return msg }, false},
 		{ethTxs[0], func(msg sdk.Msg) sdk.Msg {
-			tx := msg.(Transaction)
+			tx := msg.(*Transaction)
-			tx.Data.Price = sdk.NewInt(-1)
+			tx.data.Price = big.NewInt(-1)
 			return tx
 		}, true},
 		{ethTxs[0], func(msg sdk.Msg) sdk.Msg {
-			tx := msg.(Transaction)
+			tx := msg.(*Transaction)
-			tx.Data.Amount = sdk.NewInt(-1)
+			tx.data.Amount = big.NewInt(-1)
 			return tx
 		}, true},
 	}
@@ -112,59 +86,57 @@ func TestValidation(t *testing.T) {
 	}
 }
 
-func TestTransactionGetMsgs(t *testing.T) {
+func TestTransactionVerifySig(t *testing.T) {
-	ethTxs := newTestEthTxs(
+	txs := NewTestEthTxs(
-		testChainID,
+		TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1},
-		[]*ecdsa.PrivateKey{testPrivKey1},
-		[]ethcmn.Address{testAddr1},
 	)
 
-	msgs := ethTxs[0].GetMsgs()
+	addr, err := txs[0].VerifySig(TestChainID)
-	require.Len(t, msgs, 1)
+	require.NoError(t, err)
-	require.Equal(t, ethTxs[0], msgs[0])
+	require.Equal(t, TestAddr1, addr)
 
-	expectedMsgs := []sdk.Msg{sdk.NewTestMsg(sdk.AccAddress(testAddr1.Bytes()))}
+	addr, err = txs[0].VerifySig(big.NewInt(100))
-	etx := newTestStdTx(
+	require.Error(t, err)
-		testChainID, expectedMsgs, []*ecdsa.PrivateKey{testPrivKey1},
+	require.NotEqual(t, TestAddr1, addr)
-		[]int64{0}, []int64{0}, newStdFee(),
-	)
-
-	msgs = etx.GetMsgs()
-	require.Len(t, msgs, len(expectedMsgs))
-	require.Equal(t, expectedMsgs, msgs)
 }
 
 func TestTxDecoder(t *testing.T) {
-	testCodec := newTestCodec()
+	testCodec := NewTestCodec()
-	txDecoder := TxDecoder(testCodec)
+	txDecoder := TxDecoder(testCodec, TestSDKAddr)
 	msgs := []sdk.Msg{sdk.NewTestMsg()}
 
 	// create a non-SDK Ethereum transaction
-	emintTx := NewTransaction(
+	txs := NewTestEthTxs(
-		uint64(0), testAddr1, sdk.NewInt(10), 100, sdk.NewInt(100), nil,
+		TestChainID, []int64{0}, []ethcmn.Address{TestAddr1}, []*ecdsa.PrivateKey{TestPrivKey1},
 	)
-	emintTx.Sign(testChainID, testPrivKey1)
+
+	txBytes, err := rlp.EncodeToBytes(txs[0])
+	require.NoError(t, err)
 
 	// require the transaction to properly decode into a Transaction
-	txBytes := testCodec.MustMarshalBinary(emintTx)
+	decodedTx, err := txDecoder(txBytes)
-	tx, err := txDecoder(txBytes)
 	require.NoError(t, err)
-	require.Equal(t, emintTx, tx)
+	require.IsType(t, Transaction{}, decodedTx)
+	require.Equal(t, txs[0].data, (decodedTx.(Transaction)).data)
 
 	// create a SDK (auth.StdTx) transaction and encode
-	stdTx := newTestStdTx(
+	txs = NewTestSDKTxs(
-		testChainID, msgs, []*ecdsa.PrivateKey{testPrivKey1},
+		testCodec, TestChainID, TestSDKAddr, msgs, []int64{0}, []int64{0},
-		[]int64{0}, []int64{0}, newStdFee(),
+		[]*ecdsa.PrivateKey{TestPrivKey1}, NewTestStdFee(),
 	)
 
-	// require the transaction to properly decode into a Transaction
+	txBytes, err = rlp.EncodeToBytes(txs[0])
-	txBytes = testCodec.MustMarshalBinary(stdTx)
-	tx, err = txDecoder(txBytes)
 	require.NoError(t, err)
-	require.Equal(t, stdTx, tx)
+
+	// require the transaction to properly decode into a Transaction
+	stdTx := NewTestStdTx(TestChainID, msgs, []int64{0}, []int64{0}, []*ecdsa.PrivateKey{TestPrivKey1}, NewTestStdFee())
+	decodedTx, err = txDecoder(txBytes)
+	require.NoError(t, err)
+	require.IsType(t, auth.StdTx{}, decodedTx)
+	require.Equal(t, stdTx, decodedTx)
 
 	// require the decoding to fail when no transaction bytes are given
-	tx, err = txDecoder([]byte{})
+	decodedTx, err = txDecoder([]byte{})
 	require.Error(t, err)
-	require.Nil(t, tx)
+	require.Nil(t, decodedTx)
 }

types/utils.go

@@ -35,7 +35,7 @@ func ValidateSigner(signBytes, sig []byte, signer ethcmn.Address) error {
 	pk, err := ethcrypto.SigToPub(signBytes, sig)
 
 	if err != nil {
-		return errors.Wrap(err, "signature verification failed")
+		return errors.Wrap(err, "failed to derive public key from signature")
 	} else if ethcrypto.PubkeyToAddress(*pk) != signer {
 		return fmt.Errorf("invalid signature for signer: %s", signer)
 	}

types/utils_test.go

@@ -10,23 +10,27 @@ import (
 )
 
 func TestValidateSigner(t *testing.T) {
-	msgs := []sdk.Msg{sdk.NewTestMsg(sdk.AccAddress(testAddr1.Bytes()))}
+	msgs := []sdk.Msg{sdk.NewTestMsg(sdk.AccAddress(TestAddr1.Bytes()))}
 
 	// create message signing structure and bytes
-	signBytes := GetStdTxSignBytes(testChainID.String(), 0, 0, newStdFee(), msgs, "")
+	signBytes := GetStdTxSignBytes(TestChainID.String(), 0, 0, NewTestStdFee(), msgs, "")
 
 	// require signing not to fail
-	sig, err := ethcrypto.Sign(signBytes, testPrivKey1)
+	sig, err := ethcrypto.Sign(signBytes, TestPrivKey1)
 	require.NoError(t, err)
 
 	// require signature to be valid
-	err = ValidateSigner(signBytes, sig, testAddr1)
+	err = ValidateSigner(signBytes, sig, TestAddr1)
 	require.NoError(t, err)
 
-	sig, err = ethcrypto.Sign(signBytes, testPrivKey2)
+	sig, err = ethcrypto.Sign(signBytes, TestPrivKey2)
 	require.NoError(t, err)
 
 	// require signature to be invalid
-	err = ValidateSigner(signBytes, sig, testAddr1)
+	err = ValidateSigner(signBytes, sig, TestAddr1)
+	require.Error(t, err)
+
+	// require invalid signature bytes return an error
+	err = ValidateSigner([]byte{}, sig, TestAddr2)
 	require.Error(t, err)
 }

types/wire.go

@@ -16,7 +16,4 @@ func init() {
 func RegisterWire(codec *wire.Codec) {
 	sdk.RegisterWire(codec)
 	codec.RegisterConcrete(&Account{}, "types/Account", nil)
-	codec.RegisterConcrete(&EthSignature{}, "types/EthSignature", nil)
-	codec.RegisterConcrete(TxData{}, "types/TxData", nil)
-	codec.RegisterConcrete(Transaction{}, "types/Transaction", nil)
 }