From 29b8a0bc5ffa7a674a06a211e1c8bdd1b6ed07b1 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Thu, 23 Oct 2014 01:01:26 +0200
Subject: Updated the VM & VM tests

* Stack Error shouldn't revert to previous state
* Updated VM Test tool
* Added Transfer method to VM Env
---
 ethchain/chain_manager.go    |  2 +-
 ethchain/state_transition.go | 23 +++++------------------
 ethchain/transaction_pool.go |  2 +-
 ethchain/vm_env.go           |  4 ++++
 4 files changed, 11 insertions(+), 20 deletions(-)

(limited to 'ethchain')

diff --git a/ethchain/chain_manager.go b/ethchain/chain_manager.go
index 227b02c0a..9f82eae41 100644
--- a/ethchain/chain_manager.go
+++ b/ethchain/chain_manager.go
@@ -162,7 +162,7 @@ func AddTestNetFunds(block *Block) {
 	} {
 		codedAddr := ethutil.Hex2Bytes(addr)
 		account := block.state.GetAccount(codedAddr)
-		account.Balance = ethutil.Big("1606938044258990275541962092341162602522202993782792835301376") //ethutil.BigPow(2, 200)
+		account.SetBalance(ethutil.Big("1606938044258990275541962092341162602522202993782792835301376")) //ethutil.BigPow(2, 200)
 		block.state.UpdateStateObject(account)
 	}
 }
diff --git a/ethchain/state_transition.go b/ethchain/state_transition.go
index 79321eaac..1e6834729 100644
--- a/ethchain/state_transition.go
+++ b/ethchain/state_transition.go
@@ -89,8 +89,8 @@ func (self *StateTransition) BuyGas() error {
 	var err error
 
 	sender := self.Sender()
-	if sender.Balance.Cmp(self.tx.GasValue()) < 0 {
-		return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", self.tx.GasValue(), sender.Balance)
+	if sender.Balance().Cmp(self.tx.GasValue()) < 0 {
+		return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", self.tx.GasValue(), sender.Balance())
 	}
 
 	coinbase := self.Coinbase()
@@ -171,7 +171,7 @@ func (self *StateTransition) TransitionState() (err error) {
 		return
 	}
 
-	if sender.Balance.Cmp(self.value) < 0 {
+	if sender.Balance().Cmp(self.value) < 0 {
 		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
 	}
 
@@ -243,19 +243,6 @@ func (self *StateTransition) TransitionState() (err error) {
 	return
 }
 
-func (self *StateTransition) transferValue(sender, receiver *ethstate.StateObject) error {
-	if sender.Balance.Cmp(self.value) < 0 {
-		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
-	}
-
-	// Subtract the amount from the senders account
-	sender.SubAmount(self.value)
-	// Add the amount to receivers account which should conclude this transaction
-	receiver.AddAmount(self.value)
-
-	return nil
-}
-
 func (self *StateTransition) Eval(msg *ethstate.Message, script []byte, context *ethstate.StateObject) (ret []byte, err error) {
 	var (
 		transactor    = self.Sender()
@@ -265,9 +252,9 @@ func (self *StateTransition) Eval(msg *ethstate.Message, script []byte, context
 	)
 
 	//vm := vm.New(env, vm.Type(ethutil.Config.VmType))
-	vm := vm.New(env, vm.DebugVmTy)
+	evm := vm.New(env, vm.DebugVmTy)
 
-	ret, _, err = callerClosure.Call(vm, self.tx.Data)
+	ret, _, err = callerClosure.Call(evm, self.tx.Data)
 
 	return
 }
diff --git a/ethchain/transaction_pool.go b/ethchain/transaction_pool.go
index ff3184582..0ddc4e435 100644
--- a/ethchain/transaction_pool.go
+++ b/ethchain/transaction_pool.go
@@ -117,7 +117,7 @@ func (pool *TxPool) ValidateTransaction(tx *Transaction) error {
 	totAmount := new(big.Int).Set(tx.Value)
 	// Make sure there's enough in the sender's account. Having insufficient
 	// funds won't invalidate this transaction but simple ignores it.
-	if sender.Balance.Cmp(totAmount) < 0 {
+	if sender.Balance().Cmp(totAmount) < 0 {
 		return fmt.Errorf("[TXPL] Insufficient amount in sender's (%x) account", tx.Sender())
 	}
 
diff --git a/ethchain/vm_env.go b/ethchain/vm_env.go
index 4600878d1..36c9d6002 100644
--- a/ethchain/vm_env.go
+++ b/ethchain/vm_env.go
@@ -4,6 +4,7 @@ import (
 	"math/big"
 
 	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/vm"
 )
 
 type VMEnv struct {
@@ -30,3 +31,6 @@ func (self *VMEnv) BlockHash() []byte      { return self.block.Hash() }
 func (self *VMEnv) Value() *big.Int        { return self.tx.Value }
 func (self *VMEnv) State() *ethstate.State { return self.state }
 func (self *VMEnv) GasLimit() *big.Int     { return self.block.GasLimit }
+func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
+	return vm.Transfer(from, to, amount)
+}
-- 
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