x/evm: fix EndBlock consensus failure (#334)

* add test for sending tx w/ 21000 gas

* improve rpc transfer test

* use ctx in EndBlock

* UpdateAccounts and ClearStateObjects with passed in context

* log ethereum address on error

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>

x/evm/abci.go

@@ -31,16 +31,16 @@ func EndBlock(k Keeper, ctx sdk.Context, req abci.RequestEndBlock) []abci.Valida
 	ctx = ctx.WithBlockGasMeter(sdk.NewInfiniteGasMeter())
 
 	// Update account balances before committing other parts of state
-	k.CommitStateDB.UpdateAccounts()
+	k.UpdateAccounts(ctx)
 
 	// Commit state objects to KV store
-	_, err := k.CommitStateDB.WithContext(ctx).Commit(true)
+	_, err := k.Commit(ctx, true)
 	if err != nil {
 		panic(err)
 	}
 
 	// Clear accounts cache after account data has been committed
-	k.CommitStateDB.ClearStateObjects()
+	k.ClearStateObjects(ctx)
 
 	bloom := ethtypes.BytesToBloom(k.Bloom.Bytes())
 	k.SetBlockBloom(ctx, ctx.BlockHeight(), bloom)

x/evm/handler_test.go

@@ -1,6 +1,7 @@
 package evm_test
 
 import (
+	"crypto/ecdsa"
 	"fmt"
 	"math/big"
 	"testing"
@@ -10,6 +11,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	ethcmn "github.com/ethereum/go-ethereum/common"
+	ethcrypto "github.com/ethereum/go-ethereum/crypto"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
@@ -258,9 +260,6 @@ func (suite *EvmTestSuite) TestQueryTxLogs() {
 	err = tx.Sign(big.NewInt(3), priv.ToECDSA())
 	suite.Require().NoError(err)
 
-	// result, err := evm.HandleEthTxMsg(suite.ctx, suite.app.EvmKeeper, tx)
-	// suite.Require().NoError(err, "failed to handle eth tx msg")
-
 	result, err := suite.handler(suite.ctx, tx)
 	suite.Require().NoError(err)
 	suite.Require().NotNil(result)
@@ -291,3 +290,23 @@ func (suite *EvmTestSuite) TestQueryTxLogs() {
 	resultData.Logs[0].Data = []byte{}
 	suite.Require().Equal(txLogs.Logs[0], resultData.Logs[0])
 }
+
+func (suite *EvmTestSuite) TestSendTransaction() {
+	gasLimit := uint64(21000)
+	gasPrice := big.NewInt(1)
+
+	priv, err := crypto.GenerateKey()
+	suite.Require().NoError(err, "failed to create key")
+	pub := priv.ToECDSA().Public().(*ecdsa.PublicKey)
+
+	suite.app.EvmKeeper.SetBalance(suite.ctx, ethcrypto.PubkeyToAddress(*pub), big.NewInt(100))
+
+	// send simple value transfer with gasLimit=21000
+	tx := types.NewMsgEthereumTx(1, &ethcmn.Address{0x1}, big.NewInt(1), gasLimit, gasPrice, nil)
+	err = tx.Sign(big.NewInt(3), priv.ToECDSA())
+	suite.Require().NoError(err)
+
+	result, err := suite.handler(suite.ctx, tx)
+	suite.Require().NoError(err)
+	suite.Require().NotNil(result)
+}

x/evm/keeper/statedb.go

@@ -228,6 +228,16 @@ func (k *Keeper) CreateAccount(ctx sdk.Context, addr ethcmn.Address) {
 	k.CommitStateDB.WithContext(ctx).CreateAccount(addr)
 }
 
+// UpdateAccounts calls CommitStateDB.UpdateAccounts using the passed in context
+func (k *Keeper) UpdateAccounts(ctx sdk.Context) {
+	k.CommitStateDB.WithContext(ctx).UpdateAccounts()
+}
+
+// ClearStateObjects calls CommitStateDB.ClearStateObjects using the passed in context
+func (k *Keeper) ClearStateObjects(ctx sdk.Context) {
+	k.CommitStateDB.WithContext(ctx).ClearStateObjects()
+}
+
 // Copy calls CommitStateDB.Copy using the passed in context
 func (k *Keeper) Copy(ctx sdk.Context) ethvm.StateDB {
 	return k.CommitStateDB.WithContext(ctx).Copy()