go语言渐入佳境[43]-区块链-真实比特币序列化

真实比特币序列化

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package main

import (
"bytes"
"encoding/binary"
"log"
"fmt"
"encoding/hex"
"crypto/sha256"
)

//将类型转化为了字节数组
func IntToHex(num int32) []byte{
buff := new(bytes.Buffer)
//binary.LittleEndian 小端模式
err:= binary.Write(buff,binary.LittleEndian,num)

if err!=nil{
log.Panic(err)
}

return buff.Bytes()

}
//字节反转
func ReverseBytes4(data []byte){
for i,j :=0,len(data) - 1;i<j;i,j = i+1,j - 1{
data[i],data[j] = data[j],data[i]
}
}


func main(){

//版本号

var version int32 = 2

fmt.Printf("%x\n",IntToHex(version))


//前一个区块的hash

prev,_ := hex.DecodeString("000000000000000016145aa12fa7e81a304c38aec3d7c5208f1d33b587f966a6")
ReverseBytes4(prev)
fmt.Printf("%x\n",prev)
//默克尔根
merkleroot,_ := hex.DecodeString("3a4f410269fcc4c7885770bc8841ce6781f15dd304ae5d2770fc93a21dbd70d7")
ReverseBytes4(merkleroot)
fmt.Printf("%x\n",merkleroot)
//时间
var time int32 = 1418755780
fmt.Printf("%x\n",IntToHex(time))

//难度
var bits int32 = 404454260
fmt.Printf("%x\n",IntToHex(bits))
//随机数
var nonce int32 = 1865996595
fmt.Printf("%x\n",IntToHex(nonce))


//拼接
result := bytes.Join([][]byte{IntToHex(version),prev,merkleroot,IntToHex(time),IntToHex(bits),IntToHex(nonce)},[]byte{})

fmt.Printf("%x\n",result)

//double hash256
firsthash := sha256.Sum256(result)
resulthash:= sha256.Sum256(firsthash[:])

ReverseBytes4(resulthash[:])
fmt.Printf("%x",resulthash)
}

参考资料:
https://www.blockchain.com/btc/block/00000000000000000a1f57cd656e5522b7bac263aa33fc98c583ad68de309603