From dca9ee79b3a27ba2cc5d026d445ae627a53617b0 Mon Sep 17 00:00:00 2001
From: obscuren <obscuren@obscura.com>
Date: Fri, 27 Dec 2013 21:23:40 +0100
Subject: [PATCH] Changed Tx serialization to return bytes instead of a string

---
 serialization.go |  8 ++++++--
 transaction.go   | 16 +++++++---------
 2 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/serialization.go b/serialization.go
index 613dcdcc5a..5a92a434fe 100644
--- a/serialization.go
+++ b/serialization.go
@@ -28,6 +28,10 @@ func NumToVarInt(x int) string {
 func RlpEncode(object interface{}) string {
   if str, ok := object.(string); ok {
     return "\x00" + NumToVarInt(len(str)) + str
+  } else if num, ok := object.(uint32); ok {
+    return RlpEncode(Uitoa(num))
+  } else if byt, ok := object.([]byte); ok {
+    return RlpEncode(string(byt))
   } else if slice, ok := object.([]interface{}); ok {
     var buffer bytes.Buffer
     for _, val := range slice {
@@ -53,7 +57,7 @@ func RlpEncode(object interface{}) string {
 }
 
 type RlpSerializer interface {
-  MarshalRls() []byte
-  UnmarshalRls([]byte)
+  MarshalRlp() []byte
+  UnmarshalRlp([]byte)
 }
 
diff --git a/transaction.go b/transaction.go
index 26d7df258b..5a268b5669 100644
--- a/transaction.go
+++ b/transaction.go
@@ -6,7 +6,6 @@ import (
   "encoding/hex"
   "crypto/sha256"
   _ "bytes"
-  "strconv"
 )
 
 /*
@@ -35,14 +34,17 @@ var Period3Reward *big.Int = new(big.Int)
 var Period4Reward *big.Int = new(big.Int)
 
 type Transaction struct {
+  RlpSerializer
+
   sender      string
   recipient   uint32
   value       uint32
   fee         uint32
   data        []string
   memory      []int
-  signature   string
 
+  // To be removed
+  signature   string
   addr        string
 }
 
@@ -61,18 +63,14 @@ func NewTransaction(to uint32, value uint32, data []string) *Transaction {
     tx.data[i] = instr
   }
 
-  b:= []byte(tx.Serialize())
+  b:= []byte(tx.MarshalRlp())
   hash := sha256.Sum256(b)
   tx.addr = hex.EncodeToString(hash[0:19])
 
   return &tx
 }
 
-func Uitoa(i uint32) string {
-  return strconv.FormatUint(uint64(i), 10)
-}
-
-func (tx *Transaction) Serialize() string {
+func (tx *Transaction) MarshalRlp() []byte {
   // Prepare the transaction for serialization
   preEnc := []interface{}{
     "0", // TODO last Tx
@@ -84,7 +82,7 @@ func (tx *Transaction) Serialize() string {
     tx.data,
   }
 
-  return RlpEncode(preEnc)
+  return []byte(RlpEncode(preEnc))
 }
 
 func InitFees() {