From c74c07eed19f8a328f47aca7b9e01dcdf8731847 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Tue, 3 Mar 2015 16:20:38 +0100
Subject: [PATCH] Fixed error for invalid transaction

---
 core/error.go            | 18 ++++++++++++++++++
 core/state_transition.go | 13 ++++++-------
 tests/helper/vm.go       |  4 ++++
 tests/vm/gh_test.go      |  6 +-----
 4 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/core/error.go b/core/error.go
index e86bacb2d..fb1eaed84 100644
--- a/core/error.go
+++ b/core/error.go
@@ -87,6 +87,24 @@ func IsNonceErr(err error) bool {
 	return ok
 }
 
+type InvalidTxErr struct {
+	Message string
+}
+
+func (err *InvalidTxErr) Error() string {
+	return err.Message
+}
+
+func InvalidTxError(err error) *InvalidTxErr {
+	return &InvalidTxErr{fmt.Sprintf("%v", err)}
+}
+
+func IsInvalidTxErr(err error) bool {
+	_, ok := err.(*InvalidTxErr)
+
+	return ok
+}
+
 type OutOfGasErr struct {
 	Message string
 }
diff --git a/core/state_transition.go b/core/state_transition.go
index 751806843..00e383f3f 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -3,7 +3,6 @@ package core
 import (
 	"fmt"
 	"math/big"
-
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/state"
@@ -146,7 +145,7 @@ func (self *StateTransition) preCheck() (err error) {
 
 	// Pre-pay gas / Buy gas of the coinbase account
 	if err = self.BuyGas(); err != nil {
-		return err
+		return InvalidTxError(err)
 	}
 
 	return nil
@@ -167,15 +166,15 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 
 	defer self.RefundGas()
 
+	// Transaction gas
+	if err = self.UseGas(vm.GasTx); err != nil {
+		return nil, InvalidTxError(err)
+	}
+
 	// Increment the nonce for the next transaction
 	self.state.SetNonce(sender.Address(), sender.Nonce()+1)
 	//sender.Nonce += 1
 
-	// Transaction gas
-	if err = self.UseGas(vm.GasTx); err != nil {
-		return
-	}
-
 	// Pay data gas
 	var dgas int64
 	for _, byt := range self.data {
diff --git a/tests/helper/vm.go b/tests/helper/vm.go
index 8811936fa..9ebf8f8b6 100644
--- a/tests/helper/vm.go
+++ b/tests/helper/vm.go
@@ -167,6 +167,7 @@ func RunState(statedb *state.StateDB, env, tx map[string]string) ([]byte, state.
 	// Set pre compiled contracts
 	vm.Precompiled = vm.PrecompiledContracts()
 
+	snapshot := statedb.Copy()
 	coinbase := statedb.GetOrNewStateObject(caddr)
 	coinbase.SetGasPool(ethutil.Big(env["currentGasLimit"]))
 
@@ -175,6 +176,9 @@ func RunState(statedb *state.StateDB, env, tx map[string]string) ([]byte, state.
 	st := core.NewStateTransition(vmenv, message, coinbase)
 	vmenv.origin = keyPair.Address()
 	ret, err := st.TransitionState()
+	if core.IsNonceErr(err) || core.IsInvalidTxErr(err) {
+		statedb.Set(snapshot)
+	}
 	statedb.Update(vmenv.Gas)
 
 	return ret, vmenv.logs, vmenv.Gas, err
diff --git a/tests/vm/gh_test.go b/tests/vm/gh_test.go
index 64e858280..a3eb93616 100644
--- a/tests/vm/gh_test.go
+++ b/tests/vm/gh_test.go
@@ -79,10 +79,6 @@ func RunVmTest(p string, t *testing.T) {
 	helper.CreateFileTests(t, p, &tests)
 
 	for name, test := range tests {
-		helper.Logger.SetLogLevel(4)
-		if name != "callcodeToNameRegistratorAddresTooBigRight" {
-			continue
-		}
 		db, _ := ethdb.NewMemDatabase()
 		statedb := state.New(nil, db)
 		for addr, account := range test.Pre {
@@ -161,7 +157,7 @@ func RunVmTest(p string, t *testing.T) {
 
 		if !isVmTest {
 			if !bytes.Equal(ethutil.Hex2Bytes(test.PostStateRoot), statedb.Root()) {
-				//t.Errorf("%s's : Post state root error. Expected %s, got %x", name, test.PostStateRoot, statedb.Root())
+				t.Errorf("%s's : Post state root error. Expected %s, got %x", name, test.PostStateRoot, statedb.Root())
 			}
 		}