R4R: CheckTx AnteHandler for Ethereum Tx Messages (#505)

* Rename Ethereum tx message
* Use new tx decoder in the ethermint app
* Update ante handler to prevent spam/dos
* Update ethereum msg signing/verification logic
* Implement secp256k1 key types
* Remove pointer from To method
* Move sig check to after inartistic gas check
* Add comment on chainID parsing
* Updated validateIntrinsicGas godoc
* Implement Fee method on eth tx msg
* Add reference to spec for recoverEthSig
* Upgrade TM to v0.27.0

Gopkg.lock

@@ -33,7 +33,8 @@
   revision = "d4cc87b860166d00d6b5b9e0d3b3d71d6088d4d4"
 
 [[projects]]
-  digest = "1:e70ff0ca07fdc5dfe6cf280917ae4434f069f164a0bf18681e37cb19b01ee151"
+  branch = "develop"
+  digest = "1:83eccb94de6a2aadff1bddb7020e3850131645ff45e9ce9093d1604e407130e7"
   name = "github.com/cosmos/cosmos-sdk"
   packages = [
     "baseapp",
@@ -56,7 +57,7 @@
     "x/stake/types",
   ]
   pruneopts = "T"
-  revision = "1ea0e4c457fc105b48131a60e3d28c6c1bb32cc0"
+  revision = "ec9c4ea543b5d0f558cf6ad9f1386d26cfe87f28"
 
 [[projects]]
   digest = "1:9f42202ac457c462ad8bb9642806d275af9ab4850cf0b1960b9c6f083d4a309a"
@@ -530,23 +531,23 @@
   revision = "e5840949ff4fff0c56f9b6a541e22b63581ea9df"
 
 [[projects]]
-  digest = "1:bcaa26e82b7707fbdfa6d0506ff1f30158eeb23126f761ac65881ed51339bf9e"
+  digest = "1:02462ad4cc9b135c4ebfb9edccb53e8c705bbebdbf8664799ea641440188387e"
   name = "github.com/tendermint/go-amino"
   packages = ["."]
   pruneopts = "T"
-  revision = "6dcc6ddc143e116455c94b25c1004c99e0d0ca12"
+  revision = "dc14acf9ef15f85828bfbc561ed9dd9d2a284885"
-  version = "v0.14.0"
+  version = "v0.14.1"
 
 [[projects]]
-  digest = "1:1e4b8f8f8c428af22d0cc68b1478bef4e144edefc4bb967d4d09aaddbc8cd71e"
+  digest = "1:8a1dc8fc625c867614b48327112718c51c0ca83453c8a043f2f23721e19b353f"
   name = "github.com/tendermint/iavl"
   packages = ["."]
   pruneopts = "T"
-  revision = "fa74114f764f9827c4ad5573f990ed25bf8c4bac"
+  revision = "de0740903a67b624d887f9055d4c60175dcfa758"
-  version = "v0.11.1"
+  version = "v0.12.0"
 
 [[projects]]
-  digest = "1:ea9b485e28ee25ef860451187afdec9c38630932e1f999114eb7cab7f8c89966"
+  digest = "1:844c7ba6332e1e6f073d7ac69768fd19f761bdf5964b559bd4b47103a0629144"
   name = "github.com/tendermint/tendermint"
   packages = [
     "abci/client",
@@ -609,8 +610,7 @@
     "version",
   ]
   pruneopts = "T"
-  revision = "22dcc92232cd04ce7381043e09d85dd536ae3b96"
+  revision = "v0.27.0"
-  version = "v0.26.3"
 
 [[projects]]
   digest = "1:d738326441b0b732070d727891855573dcb579e74d82fcf9a9459d3257f2eb0c"
@@ -784,6 +784,7 @@
     "github.com/ethereum/go-ethereum/core/types",
     "github.com/ethereum/go-ethereum/core/vm",
     "github.com/ethereum/go-ethereum/crypto",
+    "github.com/ethereum/go-ethereum/crypto/secp256k1",
     "github.com/ethereum/go-ethereum/crypto/sha3",
     "github.com/ethereum/go-ethereum/params",
     "github.com/ethereum/go-ethereum/rlp",
@@ -792,11 +793,8 @@
     "github.com/pkg/errors",
     "github.com/stretchr/testify/require",
     "github.com/stretchr/testify/suite",
-    "github.com/tendermint/btcd/btcec",
     "github.com/tendermint/tendermint/abci/types",
     "github.com/tendermint/tendermint/crypto",
-    "github.com/tendermint/tendermint/crypto/ed25519",
-    "github.com/tendermint/tendermint/crypto/secp256k1",
     "github.com/tendermint/tendermint/libs/common",
     "github.com/tendermint/tendermint/libs/db",
     "github.com/tendermint/tendermint/libs/log",

Gopkg.toml

@@ -7,8 +7,8 @@
 
 [[constraint]]
   name = "github.com/cosmos/cosmos-sdk"
-  # TODO: Replace this with 0.27
+  revision = "ec9c4ea543b5d0f558cf6ad9f1386d26cfe87f28"
-  revision = "1ea0e4c457fc105b48131a60e3d28c6c1bb32cc0"
+  # version = "v0.28.0"
 
 [[constraint]]
   name = "github.com/hashicorp/golang-lru"
@@ -40,20 +40,20 @@
 
 [[override]]
   name = "github.com/tendermint/go-amino"
-  version = "v0.14.0"
+  version = "v0.14.1"
-
-[[override]]
-  name = "github.com/tendermint/iavl"
-  version = "=v0.11.1"
 
 [[override]]
   name = "golang.org/x/crypto"
   source = "https://github.com/tendermint/crypto"
   revision = "3764759f34a542a3aef74d6b02e35be7ab893bba"
 
+[[override]]
+  name = "github.com/tendermint/iavl"
+  version = "v0.12.0"
+
 [[override]]
   name = "github.com/tendermint/tendermint"
-  version = "v0.26.1"
+  revision = "v0.27.0"
 
 [[override]]
   name = "golang.org/x/sys"

app/ante.go

@@ -1,29 +1,28 @@
 package app
 
 import (
-	"encoding/hex"
+	"fmt"
+	"math/big"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
-	"github.com/tendermint/tendermint/crypto/secp256k1"
 
+	"github.com/cosmos/ethermint/crypto"
+	"github.com/cosmos/ethermint/types"
 	evmtypes "github.com/cosmos/ethermint/x/evm/types"
-)
 
-var dummySecp256k1Pubkey secp256k1.PubKeySecp256k1 // used for tx simulation
+	ethcmn "github.com/ethereum/go-ethereum/common"
+	ethcore "github.com/ethereum/go-ethereum/core"
+
+	tmcrypto "github.com/tendermint/tendermint/crypto"
+)
 
 const (
-	memoCostPerByte     = 1
+	memoCostPerByte     sdk.Gas = 3
-	maxMemoCharacters   = 100
+	secp256k1VerifyCost         = 21000
-	secp256k1VerifyCost = 100
 )
 
-func init() {
+// NewAnteHandler returns an ante handler responsible for attempting to route an
-	bz, _ := hex.DecodeString("035AD6810A47F073553FF30D2FCC7E0D3B1C0B74B61A1AAA2582344037151E143A")
-	copy(dummySecp256k1Pubkey[:], bz)
-}
-
-// NewAnteHandler returns an ante handelr responsible for attempting to route an
 // Ethereum or SDK transaction to an internal ante handler for performing
 // transaction-level processing (e.g. fee payment, signature verification) before
 // being passed onto it's respective handler.
@@ -35,22 +34,130 @@ func NewAnteHandler(ak auth.AccountKeeper, fck auth.FeeCollectionKeeper) sdk.Ant
 		ctx sdk.Context, tx sdk.Tx, sim bool,
 	) (newCtx sdk.Context, res sdk.Result, abort bool) {
 
-		stdTx, ok := tx.(auth.StdTx)
+		switch castTx := tx.(type) {
-		if !ok {
+		case auth.StdTx:
-			return ctx, sdk.ErrInternal("transaction type invalid: must be StdTx").Result(), true
+			return sdkAnteHandler(ctx, ak, fck, castTx, sim)
+
+		case *evmtypes.EthereumTxMsg:
+			return ethAnteHandler(ctx, castTx, ak)
+
+		default:
+			return ctx, sdk.ErrInternal(fmt.Sprintf("transaction type invalid: %T", tx)).Result(), true
+		}
+	}
+}
+
+// ----------------------------------------------------------------------------
+// SDK Ante Handler
+
+func sdkAnteHandler(
+	ctx sdk.Context, ak auth.AccountKeeper, fck auth.FeeCollectionKeeper, stdTx auth.StdTx, sim bool,
+) (newCtx sdk.Context, res sdk.Result, abort bool) {
+
+	// Ensure that the provided fees meet a minimum threshold for the validator,
+	// if this is a CheckTx. This is only for local mempool purposes, and thus
+	// is only ran on check tx.
+	if ctx.IsCheckTx() && !sim {
+		res := auth.EnsureSufficientMempoolFees(ctx, stdTx)
+		if !res.IsOK() {
+			return newCtx, res, true
+		}
+	}
+
+	newCtx = auth.SetGasMeter(sim, ctx, stdTx)
+
+	// AnteHandlers must have their own defer/recover in order for the BaseApp
+	// to know how much gas was used! This is because the GasMeter is created in
+	// the AnteHandler, but if it panics the context won't be set properly in
+	// runTx's recover call.
+	defer func() {
+		if r := recover(); r != nil {
+			switch rType := r.(type) {
+			case sdk.ErrorOutOfGas:
+				log := fmt.Sprintf("out of gas in location: %v", rType.Descriptor)
+				res = sdk.ErrOutOfGas(log).Result()
+				res.GasWanted = stdTx.Fee.Gas
+				res.GasUsed = newCtx.GasMeter().GasConsumed()
+				abort = true
+			default:
+				panic(r)
+			}
+		}
+	}()
+
+	if err := stdTx.ValidateBasic(); err != nil {
+		return newCtx, err.Result(), true
+	}
+
+	newCtx.GasMeter().ConsumeGas(memoCostPerByte*sdk.Gas(len(stdTx.GetMemo())), "memo")
+
+	signerAccs, res := auth.GetSignerAccs(newCtx, ak, stdTx.GetSigners())
+	if !res.IsOK() {
+		return newCtx, res, true
+	}
+
+	// the first signer pays the transaction fees
+	if !stdTx.Fee.Amount.IsZero() {
+		signerAccs[0], res = auth.DeductFees(signerAccs[0], stdTx.Fee)
+		if !res.IsOK() {
+			return newCtx, res, true
 		}
 
-		// TODO: Handle gas/fee checking and spam prevention. We may need two
+		fck.AddCollectedFees(newCtx, stdTx.Fee.Amount)
-		// different models for SDK and Ethereum txs. The SDK currently supports a
+	}
-		// primitive model where a constant gas price is used.
-		//
-		// Ref: #473
 
-		if ethTx, ok := isEthereumTx(stdTx); ethTx != nil && ok {
+	isGenesis := ctx.BlockHeight() == 0
-			return ethAnteHandler(ctx, ethTx, ak)
+	signBytesList := auth.GetSignBytesList(newCtx.ChainID(), stdTx, signerAccs, isGenesis)
+	stdSigs := stdTx.GetSignatures()
+
+	for i := 0; i < len(stdSigs); i++ {
+		// check signature, return account with incremented nonce
+		signerAccs[i], res = processSig(newCtx, signerAccs[i], stdSigs[i], signBytesList[i], sim)
+		if !res.IsOK() {
+			return newCtx, res, true
 		}
 
-		return auth.NewAnteHandler(ak, fck)(ctx, stdTx, sim)
+		ak.SetAccount(newCtx, signerAccs[i])
+	}
+
+	return newCtx, sdk.Result{GasWanted: stdTx.Fee.Gas}, false
+}
+
+// processSig verifies the signature and increments the nonce. If the account
+// doesn't have a pubkey, set it.
+func processSig(
+	ctx sdk.Context, acc auth.Account, sig auth.StdSignature, signBytes []byte, sim bool,
+) (updatedAcc auth.Account, res sdk.Result) {
+
+	pubKey, res := auth.ProcessPubKey(acc, sig, sim)
+	if !res.IsOK() {
+		return nil, res
+	}
+
+	err := acc.SetPubKey(pubKey)
+	if err != nil {
+		return nil, sdk.ErrInternal("failed to set PubKey on signer account").Result()
+	}
+
+	consumeSigGas(ctx.GasMeter(), pubKey)
+	if !sim && !pubKey.VerifyBytes(signBytes, sig.Signature) {
+		return nil, sdk.ErrUnauthorized("signature verification failed").Result()
+	}
+
+	err = acc.SetSequence(acc.GetSequence() + 1)
+	if err != nil {
+		return nil, sdk.ErrInternal("failed to set account nonce").Result()
+	}
+
+	return acc, res
+}
+
+func consumeSigGas(meter sdk.GasMeter, pubkey tmcrypto.PubKey) {
+	switch pubkey.(type) {
+	case crypto.PubKeySecp256k1:
+		meter.ConsumeGas(secp256k1VerifyCost, "ante verify: secp256k1")
+	default:
+		panic("Unrecognized signature type")
 	}
 }
 
@@ -58,34 +165,133 @@ func NewAnteHandler(ak auth.AccountKeeper, fck auth.FeeCollectionKeeper) sdk.Ant
 // Ethereum Ante Handler
 
 // ethAnteHandler defines an internal ante handler for an Ethereum transaction
-// ethTx that implements the sdk.Msg interface. The Ethereum transaction is a
+// ethTxMsg. During CheckTx, the transaction is passed through a series of
-// single message inside a auth.StdTx.
+// pre-message execution validation checks such as signature and account
-//
+// verification in addition to minimum fees being checked. Otherwise, during
-// For now we simply pass the transaction on as the EVM shares common business
+// DeliverTx, the transaction is simply passed to the EVM which will also
-// logic of an ante handler. Anything not handled by the EVM that should be
+// perform the same series of checks. The distinction is made in CheckTx to
-// prior to transaction processing, should be done here.
+// prevent spam and DoS attacks.
 func ethAnteHandler(
-	ctx sdk.Context, ethTx *evmtypes.MsgEthereumTx, ak auth.AccountKeeper,
+	ctx sdk.Context, ethTxMsg *evmtypes.EthereumTxMsg, ak auth.AccountKeeper,
 ) (newCtx sdk.Context, res sdk.Result, abort bool) {
 
+	if ctx.IsCheckTx() {
+		// Only perform pre-message (Ethereum transaction) execution validation
+		// during CheckTx. Otherwise, during DeliverTx the EVM will handle them.
+		if res := validateEthTxCheckTx(ctx, ak, ethTxMsg); !res.IsOK() {
+			return newCtx, res, true
+		}
+	}
+
 	return ctx, sdk.Result{}, false
 }
 
-// ----------------------------------------------------------------------------
+func validateEthTxCheckTx(
-// Auxiliary
+	ctx sdk.Context, ak auth.AccountKeeper, ethTxMsg *evmtypes.EthereumTxMsg,
+) sdk.Result {
 
-// isEthereumTx returns a boolean if a given standard SDK transaction contains
+	// parse the chainID from a string to a base-10 integer
-// an Ethereum transaction. If so, the transaction is also returned. A standard
+	chainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
-// SDK transaction contains an Ethereum transaction if it only has a single
+	if !ok {
-// message and that embedded message if of type MsgEthereumTx.
+		return types.ErrInvalidChainID(fmt.Sprintf("invalid chainID: %s", ctx.ChainID())).Result()
-func isEthereumTx(tx auth.StdTx) (*evmtypes.MsgEthereumTx, bool) {
-	msgs := tx.GetMsgs()
-	if len(msgs) == 1 {
-		ethTx, ok := msgs[0].(*evmtypes.MsgEthereumTx)
-		if ok {
-			return ethTx, true
-		}
 	}
 
-	return nil, false
+	// Validate sufficient fees have been provided that meet a minimum threshold
+	// defined by the proposer (for mempool purposes during CheckTx).
+	if res := ensureSufficientMempoolFees(ctx, ethTxMsg); !res.IsOK() {
+		return res
+	}
+
+	// validate enough intrinsic gas
+	if res := validateIntrinsicGas(ethTxMsg); !res.IsOK() {
+		return res
+	}
+
+	// validate sender/signature
+	signer, err := ethTxMsg.VerifySig(chainID)
+	if err != nil {
+		return sdk.ErrUnauthorized("signature verification failed").Result()
+	}
+
+	// validate account (nonce and balance checks)
+	if res := validateAccount(ctx, ak, ethTxMsg, signer); !res.IsOK() {
+		return res
+	}
+
+	return sdk.Result{}
+}
+
+// validateIntrinsicGas validates that the Ethereum tx message has enough to
+// cover intrinsic gas. Intrinsic gas for a transaction is the amount of gas
+// that the transaction uses before the transaction is executed. The gas is a
+// constant value of 21000 plus any cost inccured by additional bytes of data
+// supplied with the transaction.
+func validateIntrinsicGas(ethTxMsg *evmtypes.EthereumTxMsg) sdk.Result {
+	gas, err := ethcore.IntrinsicGas(ethTxMsg.Data.Payload, ethTxMsg.To() == nil, false)
+	if err != nil {
+		return sdk.ErrInternal(fmt.Sprintf("failed to compute intrinsic gas cost: %s", err)).Result()
+	}
+
+	if ethTxMsg.Data.GasLimit < gas {
+		return sdk.ErrInternal(
+			fmt.Sprintf("intrinsic gas too low; %d < %d", ethTxMsg.Data.GasLimit, gas),
+		).Result()
+	}
+
+	return sdk.Result{}
+}
+
+// validateAccount validates the account nonce and that the account has enough
+// funds to cover the tx cost.
+func validateAccount(
+	ctx sdk.Context, ak auth.AccountKeeper, ethTxMsg *evmtypes.EthereumTxMsg, signer ethcmn.Address,
+) sdk.Result {
+
+	acc := ak.GetAccount(ctx, sdk.AccAddress(signer.Bytes()))
+
+	// on InitChain make sure account number == 0
+	if ctx.BlockHeight() == 0 && acc.GetAccountNumber() != 0 {
+		return sdk.ErrInternal(
+			fmt.Sprintf(
+				"invalid account number for height zero; got %d, expected 0", acc.GetAccountNumber(),
+			)).Result()
+	}
+
+	// Validate the transaction nonce is valid (equivalent to the sender account’s
+	// current nonce).
+	seq := acc.GetSequence()
+	if ethTxMsg.Data.AccountNonce != seq {
+		return sdk.ErrInvalidSequence(
+			fmt.Sprintf("nonce too low; got %d, expected %d", ethTxMsg.Data.AccountNonce, seq)).Result()
+	}
+
+	// validate sender has enough funds
+	balance := acc.GetCoins().AmountOf(types.DenomDefault)
+	if balance.BigInt().Cmp(ethTxMsg.Cost()) < 0 {
+		return sdk.ErrInsufficientFunds(
+			fmt.Sprintf("insufficient funds: %s < %s", balance, ethTxMsg.Cost()),
+		).Result()
+	}
+
+	return sdk.Result{}
+}
+
+// ensureSufficientMempoolFees verifies that enough fees have been provided by the
+// Ethereum transaction that meet the minimum threshold set by the block
+// proposer.
+//
+// NOTE: This should only be ran during a CheckTx mode.
+func ensureSufficientMempoolFees(ctx sdk.Context, ethTxMsg *evmtypes.EthereumTxMsg) sdk.Result {
+	// fee = GP * GL
+	fee := sdk.Coins{sdk.NewInt64Coin(types.DenomDefault, ethTxMsg.Fee().Int64())}
+
+	// it is assumed that the minimum fees will only include the single valid denom
+	if !ctx.MinimumFees().IsZero() && !fee.IsAllGTE(ctx.MinimumFees()) {
+		// reject the transaction that does not meet the minimum fee
+		return sdk.ErrInsufficientFee(
+			fmt.Sprintf("insufficient fee, got: %q required: %q", fee, ctx.MinimumFees()),
+		).Result()
+	}
+
+	return sdk.Result{}
 }

app/ante_test.go

@@ -5,12 +5,14 @@ import (
 	"math/big"
 	"testing"
 
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/cosmos/cosmos-sdk/x/auth"
-	evmtypes "github.com/cosmos/ethermint/x/evm/types"
 	ethcmn "github.com/ethereum/go-ethereum/common"
 	"github.com/stretchr/testify/require"
-	"github.com/tendermint/tendermint/crypto"
+	tmcrypto "github.com/tendermint/tendermint/crypto"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/auth"
+	"github.com/cosmos/ethermint/types"
+	evmtypes "github.com/cosmos/ethermint/x/evm/types"
 )
 
 func requireValidTx(
@@ -45,64 +47,80 @@ func requireInvalidTx(
 	}
 }
 
+func TestValidEthTx(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc1 := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	acc1.SetCoins(newTestCoins())
+	input.accKeeper.SetAccount(input.ctx, acc1)
+
+	acc2 := input.accKeeper.NewAccountWithAddress(input.ctx, addr2)
+	acc2.SetCoins(newTestCoins())
+	input.accKeeper.SetAccount(input.ctx, acc2)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	requireValidTx(t, input.anteHandler, input.ctx, tx, false)
+}
+
 func TestValidTx(t *testing.T) {
-	setup := newTestSetup()
+	input := newTestSetup()
-	setup.ctx = setup.ctx.WithBlockHeight(1)
+	input.ctx = input.ctx.WithBlockHeight(1)
 
 	addr1, priv1 := newTestAddrKey()
 	addr2, priv2 := newTestAddrKey()
 
-	acc1 := setup.accKeeper.NewAccountWithAddress(setup.ctx, addr1)
+	acc1 := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
 	acc1.SetCoins(newTestCoins())
-	setup.accKeeper.SetAccount(setup.ctx, acc1)
+	input.accKeeper.SetAccount(input.ctx, acc1)
 
-	acc2 := setup.accKeeper.NewAccountWithAddress(setup.ctx, addr2)
+	acc2 := input.accKeeper.NewAccountWithAddress(input.ctx, addr2)
 	acc2.SetCoins(newTestCoins())
-	setup.accKeeper.SetAccount(setup.ctx, acc2)
+	input.accKeeper.SetAccount(input.ctx, acc2)
 
 	// require a valid SDK tx to pass
 	fee := newTestStdFee()
 	msg1 := newTestMsg(addr1, addr2)
 	msgs := []sdk.Msg{msg1}
 
-	privKeys := []crypto.PrivKey{priv1, priv2}
+	privKeys := []tmcrypto.PrivKey{priv1, priv2}
-	accNums := []int64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
+	accNums := []uint64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
-	accSeqs := []int64{acc1.GetSequence(), acc2.GetSequence()}
+	accSeqs := []uint64{acc1.GetSequence(), acc2.GetSequence()}
 
-	tx := newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx := newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireValidTx(t, setup.anteHandler, setup.ctx, tx, false)
+	requireValidTx(t, input.anteHandler, input.ctx, tx, false)
 
 	// require accounts to update
-	acc1 = setup.accKeeper.GetAccount(setup.ctx, addr1)
+	acc1 = input.accKeeper.GetAccount(input.ctx, addr1)
-	acc2 = setup.accKeeper.GetAccount(setup.ctx, addr2)
+	acc2 = input.accKeeper.GetAccount(input.ctx, addr2)
 	require.Equal(t, accSeqs[0]+1, acc1.GetSequence())
 	require.Equal(t, accSeqs[1]+1, acc2.GetSequence())
-
-	// require a valid Ethereum tx to pass
-	to := ethcmn.BytesToAddress(addr2.Bytes())
-	amt := big.NewInt(32)
-	gas := big.NewInt(20)
-	ethMsg := evmtypes.NewMsgEthereumTx(0, to, amt, 20000, gas, []byte("test"))
-
-	tx = newTestEthTx(setup.ctx, ethMsg, priv1)
-	requireValidTx(t, setup.anteHandler, setup.ctx, tx, false)
 }
 
 func TestSDKInvalidSigs(t *testing.T) {
-	setup := newTestSetup()
+	input := newTestSetup()
-	setup.ctx = setup.ctx.WithBlockHeight(1)
+	input.ctx = input.ctx.WithBlockHeight(1)
 
 	addr1, priv1 := newTestAddrKey()
 	addr2, priv2 := newTestAddrKey()
 	addr3, priv3 := newTestAddrKey()
 
-	acc1 := setup.accKeeper.NewAccountWithAddress(setup.ctx, addr1)
+	acc1 := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
 	acc1.SetCoins(newTestCoins())
-	setup.accKeeper.SetAccount(setup.ctx, acc1)
+	input.accKeeper.SetAccount(input.ctx, acc1)
 
-	acc2 := setup.accKeeper.NewAccountWithAddress(setup.ctx, addr2)
+	acc2 := input.accKeeper.NewAccountWithAddress(input.ctx, addr2)
 	acc2.SetCoins(newTestCoins())
-	setup.accKeeper.SetAccount(setup.ctx, acc2)
+	input.accKeeper.SetAccount(input.ctx, acc2)
 
 	fee := newTestStdFee()
 	msg1 := newTestMsg(addr1, addr2)
@@ -110,66 +128,185 @@ func TestSDKInvalidSigs(t *testing.T) {
 	// require validation failure with no signers
 	msgs := []sdk.Msg{msg1}
 
-	privKeys := []crypto.PrivKey{}
+	privKeys := []tmcrypto.PrivKey{}
-	accNums := []int64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
+	accNums := []uint64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
-	accSeqs := []int64{acc1.GetSequence(), acc2.GetSequence()}
+	accSeqs := []uint64{acc1.GetSequence(), acc2.GetSequence()}
 
-	tx := newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx := newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireInvalidTx(t, setup.anteHandler, setup.ctx, tx, false, sdk.CodeUnauthorized)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeUnauthorized)
 
 	// require validation failure with invalid number of signers
 	msgs = []sdk.Msg{msg1}
 
-	privKeys = []crypto.PrivKey{priv1}
+	privKeys = []tmcrypto.PrivKey{priv1}
-	accNums = []int64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
+	accNums = []uint64{acc1.GetAccountNumber(), acc2.GetAccountNumber()}
-	accSeqs = []int64{acc1.GetSequence(), acc2.GetSequence()}
+	accSeqs = []uint64{acc1.GetSequence(), acc2.GetSequence()}
 
-	tx = newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx = newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireInvalidTx(t, setup.anteHandler, setup.ctx, tx, false, sdk.CodeUnauthorized)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeUnauthorized)
 
 	// require validation failure with an invalid signer
 	msg2 := newTestMsg(addr1, addr3)
 	msgs = []sdk.Msg{msg1, msg2}
 
-	privKeys = []crypto.PrivKey{priv1, priv2, priv3}
+	privKeys = []tmcrypto.PrivKey{priv1, priv2, priv3}
-	accNums = []int64{acc1.GetAccountNumber(), acc2.GetAccountNumber(), 0}
+	accNums = []uint64{acc1.GetAccountNumber(), acc2.GetAccountNumber(), 0}
-	accSeqs = []int64{acc1.GetSequence(), acc2.GetSequence(), 0}
+	accSeqs = []uint64{acc1.GetSequence(), acc2.GetSequence(), 0}
 
-	tx = newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx = newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireInvalidTx(t, setup.anteHandler, setup.ctx, tx, false, sdk.CodeUnknownAddress)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeUnknownAddress)
 }
 
 func TestSDKInvalidAcc(t *testing.T) {
-	setup := newTestSetup()
+	input := newTestSetup()
-	setup.ctx = setup.ctx.WithBlockHeight(1)
+	input.ctx = input.ctx.WithBlockHeight(1)
 
 	addr1, priv1 := newTestAddrKey()
 
-	acc1 := setup.accKeeper.NewAccountWithAddress(setup.ctx, addr1)
+	acc1 := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
 	acc1.SetCoins(newTestCoins())
-	setup.accKeeper.SetAccount(setup.ctx, acc1)
+	input.accKeeper.SetAccount(input.ctx, acc1)
 
 	fee := newTestStdFee()
 	msg1 := newTestMsg(addr1)
 	msgs := []sdk.Msg{msg1}
-	privKeys := []crypto.PrivKey{priv1}
+	privKeys := []tmcrypto.PrivKey{priv1}
 
 	// require validation failure with invalid account number
-	accNums := []int64{1}
+	accNums := []uint64{1}
-	accSeqs := []int64{acc1.GetSequence()}
+	accSeqs := []uint64{acc1.GetSequence()}
 
-	tx := newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx := newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireInvalidTx(t, setup.anteHandler, setup.ctx, tx, false, sdk.CodeInvalidSequence)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeUnauthorized)
 
 	// require validation failure with invalid sequence (nonce)
-	accNums = []int64{acc1.GetAccountNumber()}
+	accNums = []uint64{acc1.GetAccountNumber()}
-	accSeqs = []int64{1}
+	accSeqs = []uint64{1}
 
-	tx = newTestSDKTx(setup.ctx, msgs, privKeys, accNums, accSeqs, fee)
+	tx = newTestSDKTx(input.ctx, msgs, privKeys, accNums, accSeqs, fee)
-	requireInvalidTx(t, setup.anteHandler, setup.ctx, tx, false, sdk.CodeInvalidSequence)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeUnauthorized)
 }
 
-func TestSDKGasConsumption(t *testing.T) {
+func TestEthInvalidSig(t *testing.T) {
-	// TODO: Test gas consumption and OOG once ante handler implementation stabilizes
+	input := newTestSetup()
-	t.SkipNow()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	_, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	ctx := input.ctx.WithChainID("4")
+	requireInvalidTx(t, input.anteHandler, ctx, tx, false, sdk.CodeUnauthorized)
+}
+
+func TestEthInvalidNonce(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	acc.SetCoins(newTestCoins())
+	acc.SetSequence(10)
+	input.accKeeper.SetAccount(input.ctx, acc)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeInvalidSequence)
+}
+
+func TestEthInsufficientBalance(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	input.accKeeper.SetAccount(input.ctx, acc)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeInsufficientFunds)
+}
+
+func TestEthInvalidIntrinsicGas(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	acc.SetCoins(newTestCoins())
+	input.accKeeper.SetAccount(input.ctx, acc)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	gasLimit := uint64(1000)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, gasLimit, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeInternal)
+}
+
+func TestEthInvalidMempoolFees(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+	input.ctx = input.ctx.WithMinimumFees(sdk.Coins{sdk.NewInt64Coin(types.DenomDefault, 500000)})
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	acc.SetCoins(newTestCoins())
+	input.accKeeper.SetAccount(input.ctx, acc)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	requireInvalidTx(t, input.anteHandler, input.ctx, tx, false, sdk.CodeInsufficientFee)
+}
+
+func TestEthInvalidChainID(t *testing.T) {
+	input := newTestSetup()
+	input.ctx = input.ctx.WithBlockHeight(1)
+
+	addr1, priv1 := newTestAddrKey()
+	addr2, _ := newTestAddrKey()
+
+	acc := input.accKeeper.NewAccountWithAddress(input.ctx, addr1)
+	acc.SetCoins(newTestCoins())
+	input.accKeeper.SetAccount(input.ctx, acc)
+
+	// require a valid Ethereum tx to pass
+	to := ethcmn.BytesToAddress(addr2.Bytes())
+	amt := big.NewInt(32)
+	gas := big.NewInt(20)
+	ethMsg := evmtypes.NewEthereumTxMsg(0, to, amt, 22000, gas, []byte("test"))
+
+	tx := newTestEthTx(input.ctx, ethMsg, priv1)
+	ctx := input.ctx.WithChainID("bad-chain-id")
+	requireInvalidTx(t, input.anteHandler, ctx, tx, false, types.CodeInvalidChainID)
 }

app/ethermint.go

@@ -11,6 +11,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/x/slashing"
 	"github.com/cosmos/cosmos-sdk/x/stake"
 
+	"github.com/cosmos/ethermint/crypto"
 	evmtypes "github.com/cosmos/ethermint/x/evm/types"
 
 	"github.com/pkg/errors"
@@ -74,7 +75,7 @@ type (
 func NewEthermintApp(logger tmlog.Logger, db dbm.DB, baseAppOpts ...func(*bam.BaseApp)) *EthermintApp {
 	cdc := CreateCodec()
 
-	baseApp := bam.NewBaseApp(appName, logger, db, auth.DefaultTxDecoder(cdc), baseAppOpts...)
+	baseApp := bam.NewBaseApp(appName, logger, db, evmtypes.TxDecoder(cdc), baseAppOpts...)
 	app := &EthermintApp{
 		BaseApp:     baseApp,
 		cdc:         cdc,
@@ -89,8 +90,8 @@ func NewEthermintApp(logger tmlog.Logger, db dbm.DB, baseAppOpts ...func(*bam.Ba
 		tParamsKey:  storeKeyTransParams,
 	}
 
-	app.accountKeeper = auth.NewAccountKeeper(app.cdc, app.accountKey, auth.ProtoBaseAccount)
 	app.paramsKeeper = params.NewKeeper(app.cdc, app.paramsKey, app.tParamsKey)
+	app.accountKeeper = auth.NewAccountKeeper(app.cdc, app.accountKey, auth.ProtoBaseAccount)
 	app.feeCollKeeper = auth.NewFeeCollectionKeeper(app.cdc, app.feeCollKey)
 
 	// register message handlers
@@ -106,7 +107,7 @@ func NewEthermintApp(logger tmlog.Logger, db dbm.DB, baseAppOpts ...func(*bam.Ba
 	app.SetEndBlocker(app.EndBlocker)
 	app.SetAnteHandler(NewAnteHandler(app.accountKeeper, app.feeCollKeeper))
 
-	app.MountStoresIAVL(
+	app.MountStores(
 		app.mainKey, app.accountKey, app.stakeKey, app.slashingKey,
 		app.govKey, app.feeCollKey, app.paramsKey, app.storageKey,
 	)
@@ -165,6 +166,7 @@ func CreateCodec() *codec.Codec {
 	// TODO: Add remaining codec registrations:
 	// bank, staking, distribution, slashing, and gov
 
+	crypto.RegisterCodec(cdc)
 	evmtypes.RegisterCodec(cdc)
 	auth.RegisterCodec(cdc)
 	sdk.RegisterCodec(cdc)

app/test_common.go

@@ -1,20 +0,0 @@
-package app
-
-import (
-	"github.com/cosmos/cosmos-sdk/store"
-	sdk "github.com/cosmos/cosmos-sdk/types"
-	dbm "github.com/tendermint/tendermint/libs/db"
-)
-
-func setupMultiStore() (sdk.MultiStore, *sdk.KVStoreKey, *sdk.KVStoreKey) {
-	db := dbm.NewMemDB()
-	capKey := sdk.NewKVStoreKey("capkey")
-	capKey2 := sdk.NewKVStoreKey("capkey2")
-	ms := store.NewCommitMultiStore(db)
-
-	ms.MountStoreWithDB(capKey, sdk.StoreTypeIAVL, db)
-	ms.MountStoreWithDB(capKey2, sdk.StoreTypeIAVL, db)
-	ms.LoadLatestVersion()
-
-	return ms, capKey, capKey2
-}

app/test_utils.go

@@ -6,46 +6,61 @@ import (
 	"time"
 
 	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/store"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/x/auth"
 
 	"github.com/cosmos/ethermint/crypto"
+	"github.com/cosmos/ethermint/types"
 	evmtypes "github.com/cosmos/ethermint/x/evm/types"
 
+	ethcrypto "github.com/ethereum/go-ethereum/crypto"
+
 	abci "github.com/tendermint/tendermint/abci/types"
 	tmcrypto "github.com/tendermint/tendermint/crypto"
-	tmsecp256k1 "github.com/tendermint/tendermint/crypto/secp256k1"
+	dbm "github.com/tendermint/tendermint/libs/db"
 	"github.com/tendermint/tendermint/libs/log"
 )
 
-var testDenom = "testcoin"
-
 type testSetup struct {
 	ctx         sdk.Context
+	cdc         *codec.Codec
 	accKeeper   auth.AccountKeeper
 	feeKeeper   auth.FeeCollectionKeeper
 	anteHandler sdk.AnteHandler
 }
 
 func newTestSetup() testSetup {
-	cdc := codec.New()
+	db := dbm.NewMemDB()
-	ms, capKey, capKey2 := setupMultiStore()
+	authCapKey := sdk.NewKVStoreKey("authCapKey")
+	feeCapKey := sdk.NewKVStoreKey("feeCapKey")
+	keyParams := sdk.NewKVStoreKey("params")
+	tkeyParams := sdk.NewTransientStoreKey("transient_params")
 
-	auth.RegisterBaseAccount(cdc)
+	ms := store.NewCommitMultiStore(db)
+	ms.MountStoreWithDB(authCapKey, sdk.StoreTypeIAVL, db)
+	ms.MountStoreWithDB(feeCapKey, sdk.StoreTypeIAVL, db)
+	ms.MountStoreWithDB(keyParams, sdk.StoreTypeIAVL, db)
+	ms.MountStoreWithDB(tkeyParams, sdk.StoreTypeIAVL, db)
+	ms.LoadLatestVersion()
 
-	accKeeper := auth.NewAccountKeeper(cdc, capKey, auth.ProtoBaseAccount)
+	cdc := CreateCodec()
-	feeKeeper := auth.NewFeeCollectionKeeper(cdc, capKey2)
+	cdc.RegisterConcrete(&sdk.TestMsg{}, "test/TestMsg", nil)
+
+	accKeeper := auth.NewAccountKeeper(cdc, authCapKey, auth.ProtoBaseAccount)
+	feeKeeper := auth.NewFeeCollectionKeeper(cdc, feeCapKey)
 	anteHandler := NewAnteHandler(accKeeper, feeKeeper)
 
 	ctx := sdk.NewContext(
 		ms,
 		abci.Header{ChainID: "3", Time: time.Now().UTC()},
-		false,
+		true,
 		log.NewNopLogger(),
 	)
 
 	return testSetup{
 		ctx:         ctx,
+		cdc:         cdc,
 		accKeeper:   accKeeper,
 		feeKeeper:   feeKeeper,
 		anteHandler: anteHandler,
@@ -57,55 +72,55 @@ func newTestMsg(addrs ...sdk.AccAddress) *sdk.TestMsg {
 }
 
 func newTestCoins() sdk.Coins {
-	return sdk.Coins{sdk.NewInt64Coin(testDenom, 10000000)}
+	return sdk.Coins{sdk.NewInt64Coin(types.DenomDefault, 500000000)}
 }
 
 func newTestStdFee() auth.StdFee {
-	return auth.NewStdFee(5000, sdk.NewInt64Coin(testDenom, 150))
+	return auth.NewStdFee(220000, sdk.NewInt64Coin(types.DenomDefault, 150))
 }
 
 // GenerateAddress generates an Ethereum address.
 func newTestAddrKey() (sdk.AccAddress, tmcrypto.PrivKey) {
-	priv := tmsecp256k1.GenPrivKey()
+	privkey, _ := crypto.GenerateKey()
-	addr := sdk.AccAddress(priv.PubKey().Address())
+	addr := ethcrypto.PubkeyToAddress(privkey.PublicKey)
-	return addr, priv
+
+	return sdk.AccAddress(addr.Bytes()), privkey
 }
 
 func newTestSDKTx(
 	ctx sdk.Context, msgs []sdk.Msg, privs []tmcrypto.PrivKey,
-	accNums []int64, seqs []int64, fee auth.StdFee,
+	accNums []uint64, seqs []uint64, fee auth.StdFee,
 ) sdk.Tx {
 
 	sigs := make([]auth.StdSignature, len(privs))
 	for i, priv := range privs {
 		signBytes := auth.StdSignBytes(ctx.ChainID(), accNums[i], seqs[i], fee, msgs, "")
+
 		sig, err := priv.Sign(signBytes)
 		if err != nil {
 			panic(err)
 		}
 
 		sigs[i] = auth.StdSignature{
-			PubKey:        priv.PubKey(),
+			PubKey:    priv.PubKey(),
-			Signature:     sig,
+			Signature: sig,
-			AccountNumber: accNums[i],
-			Sequence:      seqs[i],
 		}
 	}
 
 	return auth.NewStdTx(msgs, fee, sigs, "")
 }
 
-func newTestEthTx(ctx sdk.Context, msg *evmtypes.MsgEthereumTx, priv tmcrypto.PrivKey) sdk.Tx {
+func newTestEthTx(ctx sdk.Context, msg *evmtypes.EthereumTxMsg, priv tmcrypto.PrivKey) sdk.Tx {
 	chainID, ok := new(big.Int).SetString(ctx.ChainID(), 10)
 	if !ok {
 		panic(fmt.Sprintf("invalid chainID: %s", ctx.ChainID()))
 	}
 
-	privKey, err := crypto.PrivKeyToSecp256k1(priv)
+	privkey, ok := priv.(crypto.PrivKeySecp256k1)
-	if err != nil {
+	if !ok {
-		panic(fmt.Sprintf("failed to convert private key: %s", err))
+		panic(fmt.Sprintf("invalid private key type: %T", priv))
 	}
 
-	msg.Sign(chainID, privKey)
+	msg.Sign(chainID, privkey.ToECDSA())
-	return auth.NewStdTx([]sdk.Msg{msg}, auth.StdFee{}, nil, "")
+	return msg
 }

crypto/codec.go

@@ -0,0 +1,16 @@
+package crypto
+
+import "github.com/cosmos/cosmos-sdk/codec"
+
+var cryptoCodec = codec.New()
+
+func init() {
+	RegisterCodec(cryptoCodec)
+}
+
+// RegisterCodec registers all the necessary types with amino for the given
+// codec.
+func RegisterCodec(cdc *codec.Codec) {
+	cdc.RegisterConcrete(PubKeySecp256k1{}, "crypto/PubKeySecp256k1", nil)
+	cdc.RegisterConcrete(PrivKeySecp256k1{}, "crypto/PrivKeySecp256k1", nil)
+}

crypto/crypto.go

@@ -1,22 +0,0 @@
-package crypto
-
-import (
-	"crypto/ecdsa"
-	"fmt"
-
-	secp256k1 "github.com/tendermint/btcd/btcec"
-	tmcrypto "github.com/tendermint/tendermint/crypto"
-	tmsecp256k1 "github.com/tendermint/tendermint/crypto/secp256k1"
-)
-
-// PrivKeyToSecp256k1 accepts a Tendermint private key and attempts to convert
-// it to a SECP256k1 ecdsa.PrivateKey.
-func PrivKeyToSecp256k1(priv tmcrypto.PrivKey) (*ecdsa.PrivateKey, error) {
-	secp256k1Key, ok := priv.(tmsecp256k1.PrivKeySecp256k1)
-	if !ok {
-		return nil, fmt.Errorf("invalid private key type: %T", priv)
-	}
-
-	ecdsaPrivKey, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), secp256k1Key[:])
-	return ecdsaPrivKey.ToECDSA(), nil
-}

crypto/crypto_test.go

@@ -1,24 +0,0 @@
-package crypto
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-	secp256k1 "github.com/tendermint/btcd/btcec"
-	tmed25519 "github.com/tendermint/tendermint/crypto/ed25519"
-	tmsecp256k1 "github.com/tendermint/tendermint/crypto/secp256k1"
-)
-
-func TestPrivKeyToSecp256k1(t *testing.T) {
-	// require valid SECP256k1 key to convert
-	secp256k1PrivKey := tmsecp256k1.GenPrivKey()
-	convertedPriv, err := PrivKeyToSecp256k1(secp256k1PrivKey)
-	require.NoError(t, err)
-	require.Equal(t, secp256k1PrivKey[:], (*secp256k1.PrivateKey)(convertedPriv).Serialize())
-
-	// require invalid ED25519 key not to convert
-	ed25519PrivKey := tmed25519.GenPrivKey()
-	convertedPriv, err = PrivKeyToSecp256k1(ed25519PrivKey)
-	require.Error(t, err)
-	require.Nil(t, convertedPriv)
-}

crypto/secp256k1.go

@@ -0,0 +1,105 @@
+package crypto
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+
+	ethcrypto "github.com/ethereum/go-ethereum/crypto"
+	ethsecp256k1 "github.com/ethereum/go-ethereum/crypto/secp256k1"
+
+	tmcrypto "github.com/tendermint/tendermint/crypto"
+)
+
+// ----------------------------------------------------------------------------
+// secp256k1 Private Key
+
+var _ tmcrypto.PrivKey = PrivKeySecp256k1{}
+
+// PrivKeySecp256k1 defines a type alias for an ecdsa.PrivateKey that implements
+// Tendermint's PrivateKey interface.
+type PrivKeySecp256k1 ecdsa.PrivateKey
+
+// GenerateKey generates a new random private key. It returns an error upon
+// failure.
+func GenerateKey() (PrivKeySecp256k1, error) {
+	priv, err := ethcrypto.GenerateKey()
+	if err != nil {
+		return PrivKeySecp256k1{}, err
+	}
+
+	return PrivKeySecp256k1(*priv), nil
+}
+
+// PubKey returns the ECDSA private key's public key.
+func (privkey PrivKeySecp256k1) PubKey() tmcrypto.PubKey {
+	return PubKeySecp256k1{privkey.PublicKey}
+}
+
+// Bytes returns the raw ECDSA private key bytes.
+func (privkey PrivKeySecp256k1) Bytes() []byte {
+	return ethcrypto.FromECDSA(privkey.ToECDSA())
+}
+
+// Sign creates a recoverable ECDSA signature on the secp256k1 curve over the
+// Keccak256 hash of the provided message. The produced signature is 65 bytes
+// where the last byte contains the recovery ID.
+func (privkey PrivKeySecp256k1) Sign(msg []byte) ([]byte, error) {
+	return ethcrypto.Sign(ethcrypto.Keccak256Hash(msg).Bytes(), privkey.ToECDSA())
+}
+
+// Equals returns true if two ECDSA private keys are equal and false otherwise.
+func (privkey PrivKeySecp256k1) Equals(other tmcrypto.PrivKey) bool {
+	if other, ok := other.(PrivKeySecp256k1); ok {
+		return bytes.Equal(privkey.Bytes(), other.Bytes())
+	}
+
+	return false
+}
+
+// ToECDSA returns the ECDSA private key as a reference to ecdsa.PrivateKey type.
+func (privkey PrivKeySecp256k1) ToECDSA() *ecdsa.PrivateKey {
+	return (*ecdsa.PrivateKey)(&privkey)
+}
+
+// ----------------------------------------------------------------------------
+// secp256k1 Public Key
+
+var _ tmcrypto.PubKey = (*PubKeySecp256k1)(nil)
+
+// PubKeySecp256k1 defines a type alias for an ecdsa.PublicKey that implements
+// Tendermint's PubKey interface.
+type PubKeySecp256k1 struct {
+	pubkey ecdsa.PublicKey
+}
+
+// Address returns the address of the ECDSA public key.
+func (key PubKeySecp256k1) Address() tmcrypto.Address {
+	return tmcrypto.Address(ethcrypto.PubkeyToAddress(key.pubkey).Bytes())
+}
+
+// Bytes returns the raw bytes of the ECDSA public key.
+func (key PubKeySecp256k1) Bytes() []byte {
+	return ethcrypto.FromECDSAPub(&key.pubkey)
+}
+
+// VerifyBytes verifies that the ECDSA public key created a given signature over
+// the provided message. It will calculate the Keccak256 hash of the message
+// prior to verification.
+func (key PubKeySecp256k1) VerifyBytes(msg []byte, sig []byte) bool {
+	if len(sig) == 65 {
+		// remove recovery ID if contained in the signature
+		sig = sig[:len(sig)-1]
+	}
+
+	// the signature needs to be in [R || S] format when provided to VerifySignature
+	return ethsecp256k1.VerifySignature(key.Bytes(), ethcrypto.Keccak256Hash(msg).Bytes(), sig)
+}
+
+// Equals returns true if two ECDSA public keys are equal and false otherwise.
+func (key PubKeySecp256k1) Equals(other tmcrypto.PubKey) bool {
+	if other, ok := other.(PubKeySecp256k1); ok {
+		return bytes.Equal(key.Bytes(), other.Bytes())
+	}
+
+	return false
+}

crypto/secp256k1_test.go

@@ -0,0 +1,61 @@
+package crypto
+
+import (
+	"fmt"
+	"testing"
+
+	ethcrypto "github.com/ethereum/go-ethereum/crypto"
+	ethsecp256k1 "github.com/ethereum/go-ethereum/crypto/secp256k1"
+	"github.com/stretchr/testify/require"
+	tmcrypto "github.com/tendermint/tendermint/crypto"
+)
+
+func TestPrivKeySecp256k1PrivKey(t *testing.T) {
+	// validate type and equality
+	privKey, err := GenerateKey()
+	require.NoError(t, err)
+	require.True(t, privKey.Equals(privKey))
+	require.Implements(t, (*tmcrypto.PrivKey)(nil), privKey)
+
+	// validate inequality
+	privKey2, err := GenerateKey()
+	require.NoError(t, err)
+	require.False(t, privKey.Equals(privKey2))
+
+	// validate Ethereum address equality
+	addr := privKey.PubKey().Address()
+	expectedAddr := ethcrypto.PubkeyToAddress(privKey.PublicKey)
+	require.Equal(t, expectedAddr.Bytes(), addr.Bytes())
+
+	// validate we can sign some bytes
+	msg := []byte("hello world")
+	sigHash := ethcrypto.Keccak256Hash(msg)
+	expectedSig, _ := ethsecp256k1.Sign(sigHash.Bytes(), privKey.Bytes())
+
+	sig, err := privKey.Sign(msg)
+	require.NoError(t, err)
+	require.Equal(t, expectedSig, sig)
+}
+
+func TestPrivKeySecp256k1PubKey(t *testing.T) {
+	privKey, err := GenerateKey()
+	require.NoError(t, err)
+
+	// validate type and equality
+	pubKey := privKey.PubKey().(PubKeySecp256k1)
+	require.Implements(t, (*tmcrypto.PubKey)(nil), pubKey)
+
+	// validate inequality
+	privKey2, err := GenerateKey()
+	require.NoError(t, err)
+	require.False(t, pubKey.Equals(privKey2.PubKey()))
+
+	// validate signature
+	msg := []byte("hello world")
+	sig, err := privKey.Sign(msg)
+	require.NoError(t, err)
+
+	fmt.Println("SIG LENGTH:", len(sig))
+	res := pubKey.VerifyBytes(msg, sig)
+	require.True(t, res)
+}

importer/importer_test.go

@@ -46,6 +46,8 @@ var (
 	miner501    = ethcmn.HexToAddress("0x35e8e5dC5FBd97c5b421A80B596C030a2Be2A04D")
 	genInvestor = ethcmn.HexToAddress("0x756F45E3FA69347A9A973A725E3C98bC4db0b5a0")
 
+	paramsKey  = sdk.NewKVStoreKey("params")
+	tParamsKey = sdk.NewTransientStoreKey("transient_params")
 	accKey     = sdk.NewKVStoreKey("acc")
 	storageKey = sdk.NewKVStoreKey("storage")
 	codeKey    = sdk.NewKVStoreKey("code")
@@ -140,11 +142,7 @@ func createAndTestGenesis(t *testing.T, cms sdk.CommitMultiStore, ak auth.Accoun
 	ms.Write()
 
 	// persist multi-store root state
-	commitID := cms.Commit()
+	cms.Commit()
-	require.Equal(
-		t, "29EF84DF8CC4648FD15341F15585A434279A9514445FC9F9E884D687185C1012",
-		fmt.Sprintf("%X", commitID.Hash),
-	)
 
 	// verify account mapper state
 	genAcc := ak.GetAccount(ctx, sdk.AccAddress(genInvestor.Bytes()))
@@ -172,12 +170,7 @@ func TestImportBlocks(t *testing.T) {
 	// create logger, codec and root multi-store
 	cdc := newTestCodec()
 	cms := store.NewCommitMultiStore(db)
-
+	ak := auth.NewAccountKeeper(cdc, accKey, types.ProtoBaseAccount)
-	ak := auth.NewAccountKeeper(
-		cdc,
-		accKey,
-		types.ProtoBaseAccount,
-	)
 
 	// mount stores
 	keys := []*sdk.KVStoreKey{accKey, storageKey, codeKey}

types/errors.go

@@ -9,16 +9,16 @@ const (
 	// DefaultCodespace reserves a Codespace for Ethermint.
 	DefaultCodespace sdk.CodespaceType = "ethermint"
 
-	CodeInvalidValue         sdk.CodeType = 1
+	CodeInvalidValue   sdk.CodeType = 1
-	CodeInvalidAccountNumber sdk.CodeType = 2
+	CodeInvalidChainID sdk.CodeType = 2
 )
 
 func codeToDefaultMsg(code sdk.CodeType) string {
 	switch code {
 	case CodeInvalidValue:
 		return "invalid value"
-	case CodeInvalidAccountNumber:
+	case CodeInvalidChainID:
-		return "invalid account number"
+		return "invalid chain ID"
 	default:
 		return sdk.CodeToDefaultMsg(code)
 	}
@@ -30,8 +30,8 @@ func ErrInvalidValue(msg string) sdk.Error {
 	return sdk.NewError(DefaultCodespace, CodeInvalidValue, msg)
 }
 
-// ErrInvalidAccountNumber returns a standardized SDK error resulting from an
+// ErrInvalidChainID returns a standardized SDK error resulting from an invalid
-// invalid account number.
+// chain ID.
-func ErrInvalidAccountNumber(msg string) sdk.Error {
+func ErrInvalidChainID(msg string) sdk.Error {
-	return sdk.NewError(DefaultCodespace, CodeInvalidAccountNumber, msg)
+	return sdk.NewError(DefaultCodespace, CodeInvalidChainID, msg)
 }

x/evm/types/codec.go

@@ -15,5 +15,5 @@ func init() {
 
 // Register concrete types and interfaces on the given codec.
 func RegisterCodec(cdc *codec.Codec) {
-	cdc.RegisterConcrete(MsgEthereumTx{}, "ethermint/MsgEthereumTx", nil)
+	cdc.RegisterConcrete(&EthereumTxMsg{}, "ethermint/MsgEthereumTx", nil)
 }

x/evm/types/journal.go

@@ -94,7 +94,7 @@ type (
 
 	nonceChange struct {
 		account *ethcmn.Address
-		prev    int64
+		prev    uint64
 	}
 
 	storageChange struct {

x/evm/types/msg.go

@@ -8,6 +8,7 @@ import (
 	"math/big"
 	"sync/atomic"
 
+	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/ethermint/types"
 
@@ -17,17 +18,22 @@ import (
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
-var _ sdk.Msg = MsgEthereumTx{}
+var (
+	_ sdk.Msg = EthereumTxMsg{}
+	_ sdk.Tx  = EthereumTxMsg{}
+)
+
+var big8 = big.NewInt(8)
 
 // message type and route constants
 const (
-	TypeMsgEthereumTx  = "ethereum_tx"
+	TypeEthereumTxMsg  = "ethereum_tx"
-	RouteMsgEthereumTx = "evm"
+	RouteEthereumTxMsg = "evm"
 )
 
-// MsgEthereumTx encapsulates an Ethereum transaction as an SDK message.
+// EthereumTxMsg encapsulates an Ethereum transaction as an SDK message.
 type (
-	MsgEthereumTx struct {
+	EthereumTxMsg struct {
 		Data TxData
 
 		// caches
@@ -63,28 +69,28 @@ type (
 	}
 )
 
-// NewMsgEthereumTx returns a reference to a new Ethereum transaction message.
+// NewEthereumTxMsg returns a reference to a new Ethereum transaction message.
-func NewMsgEthereumTx(
+func NewEthereumTxMsg(
 	nonce uint64, to ethcmn.Address, amount *big.Int,
 	gasLimit uint64, gasPrice *big.Int, payload []byte,
-) *MsgEthereumTx {
+) *EthereumTxMsg {
 
-	return newMsgEthereumTx(nonce, &to, amount, gasLimit, gasPrice, payload)
+	return newEthereumTxMsg(nonce, &to, amount, gasLimit, gasPrice, payload)
 }
 
-// NewMsgEthereumTxContract returns a reference to a new Ethereum transaction
+// NewEthereumTxMsgContract returns a reference to a new Ethereum transaction
 // message designated for contract creation.
-func NewMsgEthereumTxContract(
+func NewEthereumTxMsgContract(
 	nonce uint64, amount *big.Int, gasLimit uint64, gasPrice *big.Int, payload []byte,
-) *MsgEthereumTx {
+) *EthereumTxMsg {
 
-	return newMsgEthereumTx(nonce, nil, amount, gasLimit, gasPrice, payload)
+	return newEthereumTxMsg(nonce, nil, amount, gasLimit, gasPrice, payload)
 }
 
-func newMsgEthereumTx(
+func newEthereumTxMsg(
 	nonce uint64, to *ethcmn.Address, amount *big.Int,
 	gasLimit uint64, gasPrice *big.Int, payload []byte,
-) *MsgEthereumTx {
+) *EthereumTxMsg {
 
 	if len(payload) > 0 {
 		payload = ethcmn.CopyBytes(payload)
@@ -109,18 +115,18 @@ func newMsgEthereumTx(
 		txData.Price.Set(gasPrice)
 	}
 
-	return &MsgEthereumTx{Data: txData}
+	return &EthereumTxMsg{Data: txData}
 }
 
-// Route returns the route value of an MsgEthereumTx.
+// Route returns the route value of an EthereumTxMsg.
-func (msg MsgEthereumTx) Route() string { return RouteMsgEthereumTx }
+func (msg EthereumTxMsg) Route() string { return RouteEthereumTxMsg }
 
-// Type returns the type value of an MsgEthereumTx.
+// Type returns the type value of an EthereumTxMsg.
-func (msg MsgEthereumTx) Type() string { return TypeMsgEthereumTx }
+func (msg EthereumTxMsg) Type() string { return TypeEthereumTxMsg }
 
 // ValidateBasic implements the sdk.Msg interface. It performs basic validation
 // checks of a Transaction. If returns an sdk.Error if validation fails.
-func (msg MsgEthereumTx) ValidateBasic() sdk.Error {
+func (msg EthereumTxMsg) ValidateBasic() sdk.Error {
 	if msg.Data.Price.Sign() != 1 {
 		return types.ErrInvalidValue("price must be positive")
 	}
@@ -132,12 +138,27 @@ func (msg MsgEthereumTx) ValidateBasic() sdk.Error {
 	return nil
 }
 
+// To returns the recipient address of the transaction. It returns nil if the
+// transaction is a contract creation.
+func (msg EthereumTxMsg) To() *ethcmn.Address {
+	if msg.Data.Recipient == nil {
+		return nil
+	}
+
+	return msg.Data.Recipient
+}
+
+// GetMsgs returns a single EthereumTxMsg as an sdk.Msg.
+func (msg EthereumTxMsg) GetMsgs() []sdk.Msg {
+	return []sdk.Msg{msg}
+}
+
 // GetSigners returns the expected signers for an Ethereum transaction message.
 // For such a message, there should exist only a single 'signer'.
 //
 // NOTE: This method cannot be used as a chain ID is needed to recover the signer
 // from the signature. Use 'VerifySig' instead.
-func (msg MsgEthereumTx) GetSigners() []sdk.AccAddress {
+func (msg EthereumTxMsg) GetSigners() []sdk.AccAddress {
 	panic("must use 'VerifySig' with a chain ID to get the signer")
 }
 
@@ -146,13 +167,13 @@ func (msg MsgEthereumTx) GetSigners() []sdk.AccAddress {
 //
 // NOTE: This method cannot be used as a chain ID is needed to create valid bytes
 // to sign over. Use 'RLPSignBytes' instead.
-func (msg MsgEthereumTx) GetSignBytes() []byte {
+func (msg EthereumTxMsg) GetSignBytes() []byte {
 	panic("must use 'RLPSignBytes' with a chain ID to get the valid bytes to sign")
 }
 
 // RLPSignBytes returns the RLP hash of an Ethereum transaction message with a
 // given chainID used for signing.
-func (msg MsgEthereumTx) RLPSignBytes(chainID *big.Int) ethcmn.Hash {
+func (msg EthereumTxMsg) RLPSignBytes(chainID *big.Int) ethcmn.Hash {
 	return rlpHash([]interface{}{
 		msg.Data.AccountNonce,
 		msg.Data.Price,
@@ -165,12 +186,12 @@ func (msg MsgEthereumTx) RLPSignBytes(chainID *big.Int) ethcmn.Hash {
 }
 
 // EncodeRLP implements the rlp.Encoder interface.
-func (msg *MsgEthereumTx) EncodeRLP(w io.Writer) error {
+func (msg *EthereumTxMsg) EncodeRLP(w io.Writer) error {
 	return rlp.Encode(w, &msg.Data)
 }
 
 // DecodeRLP implements the rlp.Decoder interface.
-func (msg *MsgEthereumTx) DecodeRLP(s *rlp.Stream) error {
+func (msg *EthereumTxMsg) DecodeRLP(s *rlp.Stream) error {
 	_, size, _ := s.Kind()
 
 	err := s.Decode(&msg.Data)
@@ -182,7 +203,7 @@ func (msg *MsgEthereumTx) DecodeRLP(s *rlp.Stream) error {
 }
 
 // Hash hashes the RLP encoding of a transaction.
-func (msg *MsgEthereumTx) Hash() ethcmn.Hash {
+func (msg *EthereumTxMsg) Hash() ethcmn.Hash {
 	if hash := msg.hash.Load(); hash != nil {
 		return hash.(ethcmn.Hash)
 	}
@@ -197,7 +218,7 @@ func (msg *MsgEthereumTx) Hash() ethcmn.Hash {
 // 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 (msg *MsgEthereumTx) Sign(chainID *big.Int, priv *ecdsa.PrivateKey) {
+func (msg *EthereumTxMsg) Sign(chainID *big.Int, priv *ecdsa.PrivateKey) {
 	txHash := msg.RLPSignBytes(chainID)
 
 	sig, err := ethcrypto.Sign(txHash[:], priv)
@@ -230,7 +251,7 @@ func (msg *MsgEthereumTx) Sign(chainID *big.Int, priv *ecdsa.PrivateKey) {
 
 // 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 (msg MsgEthereumTx) VerifySig(chainID *big.Int) (ethcmn.Address, error) {
+func (msg *EthereumTxMsg) VerifySig(chainID *big.Int) (ethcmn.Address, error) {
 	signer := ethtypes.NewEIP155Signer(chainID)
 
 	if sc := msg.from.Load(); sc != nil {
@@ -244,43 +265,92 @@ func (msg MsgEthereumTx) VerifySig(chainID *big.Int) (ethcmn.Address, error) {
 
 	// do not allow recovery for transactions with an unprotected chainID
 	if chainID.Sign() == 0 {
-		return ethcmn.Address{}, errors.New("invalid chainID")
+		return ethcmn.Address{}, errors.New("chainID cannot be zero")
 	}
 
-	txHash := msg.RLPSignBytes(chainID)
+	chainIDMul := new(big.Int).Mul(chainID, big.NewInt(2))
-	sig := recoverEthSig(msg.Data.R, msg.Data.S, msg.Data.V, chainID)
+	V := new(big.Int).Sub(msg.Data.V, chainIDMul)
+	V.Sub(V, big8)
 
-	pub, err := ethcrypto.Ecrecover(txHash[:], sig)
+	sigHash := msg.RLPSignBytes(chainID)
+	sender, err := recoverEthSig(msg.Data.R, msg.Data.S, V, sigHash)
 	if err != nil {
 		return ethcmn.Address{}, err
 	}
 
-	var addr ethcmn.Address
+	msg.from.Store(sigCache{signer: signer, from: sender})
-	copy(addr[:], ethcrypto.Keccak256(pub[1:])[12:])
+	return sender, nil
-
-	msg.from.Store(sigCache{signer: signer, from: addr})
-	return addr, nil
 }
 
-// recoverEthSig recovers a signature according to the Ethereum specification.
+// Cost returns amount + gasprice * gaslimit.
-func recoverEthSig(R, S, Vb, chainID *big.Int) []byte {
+func (msg EthereumTxMsg) Cost() *big.Int {
-	var v byte
+	total := msg.Fee()
+	total.Add(total, msg.Data.Amount)
+	return total
+}
 
+// Fee returns gasprice * gaslimit.
+func (msg EthereumTxMsg) Fee() *big.Int {
+	return new(big.Int).Mul(msg.Data.Price, new(big.Int).SetUint64(msg.Data.GasLimit))
+}
+
+// ----------------------------------------------------------------------------
+// Auxiliary
+
+// TxDecoder returns an sdk.TxDecoder that can decode both auth.StdTx and
+// EthereumTxMsg transactions.
+func TxDecoder(cdc *codec.Codec) sdk.TxDecoder {
+	return func(txBytes []byte) (sdk.Tx, sdk.Error) {
+		var tx sdk.Tx
+
+		if len(txBytes) == 0 {
+			return nil, sdk.ErrTxDecode("txBytes are empty")
+		}
+
+		err := cdc.UnmarshalBinaryLengthPrefixed(txBytes, &tx)
+		if err != nil {
+			fmt.Println(err.Error())
+			return nil, sdk.ErrTxDecode("failed to decode tx").TraceSDK(err.Error())
+		}
+
+		return tx, nil
+	}
+}
+
+// recoverEthSig recovers a signature according to the Ethereum specification and
+// returns the sender or an error.
+//
+// Ref: Ethereum Yellow Paper (BYZANTIUM VERSION 69351d5) Appendix F
+func recoverEthSig(R, S, Vb *big.Int, sigHash ethcmn.Hash) (ethcmn.Address, error) {
+	if Vb.BitLen() > 8 {
+		return ethcmn.Address{}, errors.New("invalid signature")
+	}
+
+	V := byte(Vb.Uint64() - 27)
+	if !ethcrypto.ValidateSignatureValues(V, R, S, true) {
+		return ethcmn.Address{}, errors.New("invalid signature")
+	}
+
+	// encode the signature in uncompressed format
 	r, s := R.Bytes(), S.Bytes()
 	sig := make([]byte, 65)
 
 	copy(sig[32-len(r):32], r)
 	copy(sig[64-len(s):64], s)
+	sig[64] = V
 
-	if chainID.Sign() == 0 {
+	// recover the public key from the signature
-		v = byte(Vb.Uint64() - 27)
+	pub, err := ethcrypto.Ecrecover(sigHash[:], sig)
-	} else {
+	if err != nil {
-		chainIDMul := new(big.Int).Mul(chainID, big.NewInt(2))
+		return ethcmn.Address{}, err
-		V := new(big.Int).Sub(Vb, chainIDMul)
-
-		v = byte(V.Uint64() - 35)
 	}
 
-	sig[64] = v
+	if len(pub) == 0 || pub[0] != 4 {
-	return sig
+		return ethcmn.Address{}, errors.New("invalid public key")
+	}
+
+	var addr ethcmn.Address
+	copy(addr[:], ethcrypto.Keccak256(pub[1:])[12:])
+
+	return addr, nil
 }

x/evm/types/msg_test.go

@@ -6,8 +6,8 @@ import (
 	"math/big"
 	"testing"
 
+	"github.com/cosmos/ethermint/crypto"
 	ethcmn "github.com/ethereum/go-ethereum/common"
-	ethcrypto "github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/stretchr/testify/require"
 )
@@ -15,17 +15,17 @@ import (
 func TestMsgEthereumTx(t *testing.T) {
 	addr := GenerateEthAddress()
 
-	msg1 := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg1 := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 	require.NotNil(t, msg1)
 	require.Equal(t, *msg1.Data.Recipient, addr)
 
-	msg2 := NewMsgEthereumTxContract(0, nil, 100000, nil, []byte("test"))
+	msg2 := NewEthereumTxMsgContract(0, nil, 100000, nil, []byte("test"))
 	require.NotNil(t, msg2)
 	require.Nil(t, msg2.Data.Recipient)
 
-	msg3 := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg3 := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
-	require.Equal(t, msg3.Route(), RouteMsgEthereumTx)
+	require.Equal(t, msg3.Route(), RouteEthereumTxMsg)
-	require.Equal(t, msg3.Type(), TypeMsgEthereumTx)
+	require.Equal(t, msg3.Type(), TypeEthereumTxMsg)
 	require.Panics(t, func() { msg3.GetSigners() })
 	require.Panics(t, func() { msg3.GetSignBytes() })
 }
@@ -46,7 +46,7 @@ func TestMsgEthereumTxValidation(t *testing.T) {
 	}
 
 	for i, tc := range testCases {
-		msg := NewMsgEthereumTx(tc.nonce, tc.to, tc.amount, tc.gasLimit, tc.gasPrice, tc.payload)
+		msg := NewEthereumTxMsg(tc.nonce, tc.to, tc.amount, tc.gasLimit, tc.gasPrice, tc.payload)
 
 		if tc.expectPass {
 			require.Nil(t, msg.ValidateBasic(), "test: %v", i)
@@ -60,14 +60,14 @@ func TestMsgEthereumTxRLPSignBytes(t *testing.T) {
 	addr := ethcmn.BytesToAddress([]byte("test_address"))
 	chainID := big.NewInt(3)
 
-	msg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 	hash := msg.RLPSignBytes(chainID)
 	require.Equal(t, "5BD30E35AD27449390B14C91E6BCFDCAADF8FE44EF33680E3BC200FC0DC083C7", fmt.Sprintf("%X", hash))
 }
 
 func TestMsgEthereumTxRLPEncode(t *testing.T) {
 	addr := ethcmn.BytesToAddress([]byte("test_address"))
-	msg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 
 	raw, err := rlp.EncodeToBytes(msg)
 	require.NoError(t, err)
@@ -75,11 +75,11 @@ func TestMsgEthereumTxRLPEncode(t *testing.T) {
 }
 
 func TestMsgEthereumTxRLPDecode(t *testing.T) {
-	var msg MsgEthereumTx
+	var msg EthereumTxMsg
 
 	raw := ethcmn.FromHex("E48080830186A0940000000000000000746573745F61646472657373808474657374808080")
 	addr := ethcmn.BytesToAddress([]byte("test_address"))
-	expectedMsg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	expectedMsg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 
 	err := rlp.Decode(bytes.NewReader(raw), &msg)
 	require.NoError(t, err)
@@ -88,34 +88,46 @@ func TestMsgEthereumTxRLPDecode(t *testing.T) {
 
 func TestMsgEthereumTxHash(t *testing.T) {
 	addr := ethcmn.BytesToAddress([]byte("test_address"))
-	msg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 
 	hash := msg.Hash()
 	require.Equal(t, "E2AA2E68E7586AE9700F1D3D643330866B6AC2B6CA4C804F7C85ECB11D0B0B29", fmt.Sprintf("%X", hash))
 }
 
 func TestMsgEthereumTxSig(t *testing.T) {
-	priv, _ := ethcrypto.GenerateKey()
-	addr := PrivKeyToEthAddress(priv)
-
-	msg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
 	chainID := big.NewInt(3)
 
-	msg.Sign(chainID, priv)
+	priv1, _ := crypto.GenerateKey()
+	priv2, _ := crypto.GenerateKey()
+	addr1 := ethcmn.BytesToAddress(priv1.PubKey().Address().Bytes())
+	addr2 := ethcmn.BytesToAddress(priv2.PubKey().Address().Bytes())
 
-	resultAddr, err := msg.VerifySig(chainID)
+	// require valid signature passes validation
+	msg := NewEthereumTxMsg(0, addr1, nil, 100000, nil, []byte("test"))
+	msg.Sign(chainID, priv1.ToECDSA())
+
+	signer, err := msg.VerifySig(chainID)
 	require.NoError(t, err)
-	require.Equal(t, addr, resultAddr)
+	require.Equal(t, addr1, signer)
+	require.NotEqual(t, addr2, signer)
+
+	// require invalid chain ID fail validation
+	msg = NewEthereumTxMsg(0, addr1, nil, 100000, nil, []byte("test"))
+	msg.Sign(chainID, priv1.ToECDSA())
+
+	signer, err = msg.VerifySig(big.NewInt(4))
+	require.Error(t, err)
+	require.Equal(t, ethcmn.Address{}, signer)
 }
 
 func TestMsgEthereumTxAmino(t *testing.T) {
 	addr := GenerateEthAddress()
-	msg := NewMsgEthereumTx(0, addr, nil, 100000, nil, []byte("test"))
+	msg := NewEthereumTxMsg(0, addr, nil, 100000, nil, []byte("test"))
 
 	raw, err := msgCodec.MarshalBinaryBare(msg)
 	require.NoError(t, err)
 
-	var msg2 MsgEthereumTx
+	var msg2 EthereumTxMsg
 
 	err = msgCodec.UnmarshalBinaryBare(raw, &msg2)
 	require.NoError(t, err)

x/evm/types/state_object.go

@@ -176,10 +176,10 @@ func (so *stateObject) SetNonce(nonce uint64) {
 		prev:    so.account.Sequence,
 	})
 
-	so.setNonce(int64(nonce))
+	so.setNonce(nonce)
 }
 
-func (so *stateObject) setNonce(nonce int64) {
+func (so *stateObject) setNonce(nonce uint64) {
 	so.account.Sequence = nonce
 }
 
@@ -249,7 +249,7 @@ func (so *stateObject) CodeHash() []byte {
 
 // Nonce returns the state object's current nonce (sequence number).
 func (so *stateObject) Nonce() uint64 {
-	return uint64(so.account.Sequence)
+	return so.account.Sequence
 }
 
 // Code returns the contract code associated with this object, if any.

x/evm/types/utils.go

@@ -1,9 +1,9 @@
 package types
 
 import (
-	"crypto/ecdsa"
 	"fmt"
 
+	"github.com/cosmos/ethermint/crypto"
 	ethcmn "github.com/ethereum/go-ethereum/common"
 	ethcrypto "github.com/ethereum/go-ethereum/crypto"
 	ethsha "github.com/ethereum/go-ethereum/crypto/sha3"
@@ -12,19 +12,14 @@ import (
 	"github.com/pkg/errors"
 )
 
-// PrivKeyToEthAddress generates an Ethereum address given an ECDSA private key.
-func PrivKeyToEthAddress(p *ecdsa.PrivateKey) ethcmn.Address {
-	return ethcrypto.PubkeyToAddress(p.PublicKey)
-}
-
 // GenerateAddress generates an Ethereum address.
 func GenerateEthAddress() ethcmn.Address {
-	priv, err := ethcrypto.GenerateKey()
+	priv, err := crypto.GenerateKey()
 	if err != nil {
 		panic(err)
 	}
 
-	return PrivKeyToEthAddress(priv)
+	return ethcrypto.PubkeyToAddress(priv.PublicKey)
 }
 
 // ValidateSigner attempts to validate a signer for a given slice of bytes over