From 17c5ba2b6bfaaeab423f96523b9da13a8fb3febd Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 17 Mar 2015 12:16:21 +0100
Subject: core: actually convert transaction pool

---
 core/state_transition.go | 19 +++++++++----------
 core/transaction_pool.go | 15 +++++++++------
 core/vm_env.go           |  2 +-
 3 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/core/state_transition.go b/core/state_transition.go
index 29de501b0..72999de7e 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -5,7 +5,6 @@ import (
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/vm"
 )
@@ -57,13 +56,8 @@ type Message interface {
 	Data() []byte
 }
 
-func AddressFromMessage(msg Message) []byte {
-	// Generate a new address
-	return crypto.Sha3(common.NewValue([]interface{}{msg.From(), msg.Nonce()}).Encode())[12:]
-}
-
 func MessageCreatesContract(msg Message) bool {
-	return len(msg.To()) == 0
+	return msg.To() == nil
 }
 
 func MessageGasValue(msg Message) *big.Int {
@@ -93,13 +87,18 @@ func (self *StateTransition) Coinbase() *state.StateObject {
 	return self.state.GetOrNewStateObject(self.coinbase)
 }
 func (self *StateTransition) From() *state.StateObject {
-	return self.state.GetOrNewStateObject(self.msg.From())
+	f, _ := self.msg.From()
+	return self.state.GetOrNewStateObject(f)
 }
 func (self *StateTransition) To() *state.StateObject {
-	if self.msg != nil && MessageCreatesContract(self.msg) {
+	if self.msg == nil {
 		return nil
 	}
-	return self.state.GetOrNewStateObject(self.msg.To())
+	to := self.msg.To()
+	if to == nil {
+		return nil // contract creation
+	}
+	return self.state.GetOrNewStateObject(*to)
 }
 
 func (self *StateTransition) UseGas(amount *big.Int) error {
diff --git a/core/transaction_pool.go b/core/transaction_pool.go
index 2efc0511c..7c50e5e53 100644
--- a/core/transaction_pool.go
+++ b/core/transaction_pool.go
@@ -91,8 +91,9 @@ func (self *TxPool) addTx(tx *types.Transaction) {
 }
 
 func (self *TxPool) add(tx *types.Transaction) error {
-	if self.txs[tx.Hash()] != nil {
-		return fmt.Errorf("Known transaction (%x)", tx.Hash()[0:4])
+	hash := tx.Hash()
+	if self.txs[hash] != nil {
+		return fmt.Errorf("Known transaction (%x)", hash[0:4])
 	}
 	err := self.ValidateTransaction(tx)
 	if err != nil {
@@ -102,7 +103,7 @@ func (self *TxPool) add(tx *types.Transaction) error {
 	self.addTx(tx)
 
 	var toname string
-	if to, valid := tx.To(); valid {
+	if to := tx.To(); to != nil {
 		toname = common.Bytes2Hex(to[:4])
 	} else {
 		toname = "[NEW_CONTRACT]"
@@ -111,7 +112,7 @@ func (self *TxPool) add(tx *types.Transaction) error {
 	// verified in ValidateTransaction.
 	f, _ := tx.From()
 	from := common.Bytes2Hex(f[:4])
-	txplogger.Debugf("(t) %x => %s (%v) %x\n", from, to, tx.Value, tx.Hash())
+	txplogger.Debugf("(t) %x => %s (%v) %x\n", from, toname, tx.Value, tx.Hash())
 
 	// Notify the subscribers
 	go self.eventMux.Post(TxPreEvent{tx})
@@ -137,7 +138,8 @@ func (self *TxPool) AddTransactions(txs []*types.Transaction) {
 		if err := self.add(tx); err != nil {
 			txplogger.Debugln(err)
 		} else {
-			txplogger.Debugf("tx %x\n", tx.Hash()[0:4])
+			h := tx.Hash()
+			txplogger.Debugf("tx %x\n", h[:4])
 		}
 	}
 }
@@ -161,7 +163,8 @@ func (pool *TxPool) RemoveInvalid(query StateQuery) {
 
 	var removedTxs types.Transactions
 	for _, tx := range pool.txs {
-		sender := query.GetAccount(tx.From())
+		from, _ := tx.From()
+		sender := query.GetAccount(from[:])
 		err := pool.ValidateTransaction(tx)
 		if err != nil || sender.Nonce() >= tx.Nonce() {
 			removedTxs = append(removedTxs, tx)
diff --git a/core/vm_env.go b/core/vm_env.go
index fb4253f5b..1ddbd5e5e 100644
--- a/core/vm_env.go
+++ b/core/vm_env.go
@@ -28,7 +28,7 @@ func NewEnv(state *state.StateDB, chain *ChainManager, msg Message, block *types
 	}
 }
 
-func (self *VMEnv) Origin() common.Address   { return self.msg.From() }
+func (self *VMEnv) Origin() common.Address   { f, _ := self.msg.From(); return f }
 func (self *VMEnv) BlockNumber() *big.Int    { return self.block.Number() }
 func (self *VMEnv) Coinbase() common.Address { return self.block.Coinbase() }
 func (self *VMEnv) Time() int64              { return self.block.Time() }
-- 
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