Block.go :定義區塊結構與方法

BlockChain.go :定義區塊鏈結構與方法

help.go :將常用代碼塊進行封裝，形成幫助庫

main.go:測試代碼

二.定義區塊結構與方法

package BLC

import (
   "time"
   "strconv"
   "bytes"
   "crypto/sha256"
)

//定義區塊
type Block struct {
   //1.區塊高度，也就是區塊的編號，第幾個區塊
   Height int64
   //2.上一個區塊的Hash值
   PreBlockHash []byte
   //3.交易數據（最終都屬於transaction 事務）
   Data []byte
   //4.創建時間的時間戳
   TimeStamp int64
   //5.當前區塊的Hash值
   Hash []byte
   //6.Nonce 隨機數，用於驗證工作量證明
   Nonce int64
}

//定義區塊生成Hash的方法
func (block *Block) SetHash() {
   //1.將Height 轉換為字節數組 []byte
   heightBytes := IntToHex(block.Height)

   //2.將TimeStamp 轉換為字節數組 []byte
   //2.1 將Int64的TimeStamp 轉換成二進制
   timeString := strconv.FormatInt(block.TimeStamp, 2)
   //2.2 將二進制字符串轉成字節數組
   timeBytes := []byte(timeString)

   //3.拼接所有屬性,形成一個二維的byte數組
   blockBytes := bytes.Join([][]byte{heightBytes, block.PreBlockHash, block.Data, timeBytes, block.Hash}, []byte{})
   //4.生成Hash
   hash := sha256.Sum256(blockBytes)
   block.Hash = hash[:]
}

//1. 創建新的區塊
func NewBlock(data string, height int64, PreBlockHash []byte) *Block {
   //創建區塊
   block := &Block{
      height,
      PreBlockHash,
      []byte(data),
      time.Now().Unix(),
      nil,
      0,
   }
   //設置Hash
   block.SetHash()
   return block

}

//2.生成創世區塊
func CreateGenesisBlock(data string) *Block {

   return NewBlock(data, 1, []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})

}

三.定義區塊鏈與方法

package BLC

type BlockChain struct {
   Blocks []*Block //存儲有序的區塊
}


func (blc *BlockChain)AddBlockChain(data string,height int64,preHash []byte){
   //創建新區塊
   newBlock := NewBlock(data,height,preHash)
   //往鏈中添加區塊
   blc.Blocks=append(blc.Blocks,newBlock)

}


//1.創建帶有創世區塊的區塊鏈
func CreateBlockChainWithGenesisBlock() *BlockChain {

   //創建創世區塊
   genesisBlock := CreateGenesisBlock("Genesis Data..")
   //返回區塊鏈對象
   return &BlockChain{[]*Block{genesisBlock}}

}

四.幫助代碼庫

package BLC

import (
   "bytes"
   "encoding/binary"
   "log"
)

//將int64轉換為字節數組
func IntToHex(num int64) []byte {
   buff := new(bytes.Buffer)
   err := binary.Write(buff, binary.BigEndian, num)
   if err != nil {
      log.Panic(err)
   }
   return buff.Bytes()
}

五.測試代碼

package main

import (
   "publicChain/BLC"
   "fmt"
)

func main() {

   //創建創世區塊
   blockChain := BLC.CreateBlockChainWithGenesisBlock()

   //創建新的區塊
   blockChain.AddBlockChain("Send $100 to Bruce", blockChain.Blocks[len(blockChain.Blocks)-1].Height+1, blockChain.Blocks[len(blockChain.Blocks)-1].Hash)
   blockChain.AddBlockChain("Send $200 to Apple", blockChain.Blocks[len(blockChain.Blocks)-1].Height+1, blockChain.Blocks[len(blockChain.Blocks)-1].Hash)
   blockChain.AddBlockChain("Send $300 to Alice", blockChain.Blocks[len(blockChain.Blocks)-1].Height+1, blockChain.Blocks[len(blockChain.Blocks)-1].Hash)
   blockChain.AddBlockChain("Send $400 to Bob", blockChain.Blocks[len(blockChain.Blocks)-1].Height+1, blockChain.Blocks[len(blockChain.Blocks)-1].Hash)

   fmt.Printf("創建的區塊鏈為:\t%v\n", blockChain)
   fmt.Printf("區塊鏈存儲的區塊為:\t%v\n", blockChain.Blocks)
   fmt.Printf("第二個區塊的數據信息(交易信息)為:\t%v\n", string(blockChain.Blocks[1].Data))

}

六.結果顯示

Golang區塊鏈開發001-初始化區塊鏈