Go实现原理的示例分析

本篇文章为大家展示了Go实现原理的示例分析，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

前言：

简单原理代码描述

core: 块、 区块实现 main: example 运行

BlockMain 执行目录：

package main import "Chains/core" func main() {        sc := core.NewBlockChain()        sc.SendData("send 1 btc to jacky")        sc.SendData("send 1 eos to jack")        sc.Print()}

Block 区块：

package core import (    "crypto/sha256"    "encoding/hex"    "time") type Block struct {    Index int64 //区块编号    Timestamp int64 //区块时间戳    PreBlockHash string //上一个区哈希值    Hash string //当前区块哈希值     Data string //区块数据} func calculateHash(b Block) string{    blockData :=  string(b.Index) + string(b.Timestamp) + b.PreBlockHash    hashInBytes := sha256.Sum256([]byte(blockData))     return hex.EncodeToString(hashInBytes[:])} func GenerateNewBlock(preBlock Block,data string) Block{    newBlock := Block{}    newBlock.Index = preBlock.Index + 1    newBlock.PreBlockHash = preBlock.Hash    newBlock.Timestamp = time.Now().Unix()    newBlock.Hash = calculateHash(newBlock)     return newBlock} func GenerateGenesisBlock() Block  {    preBlock := Block{}    preBlock.Index = 1    preBlock.Hash = ""     return GenerateNewBlock(preBlock,"Genesies Block")}

BlockChain 区块链如何实现

package core import (    "log"    "fmt") type BlockChain struct {    Blocks []*Block} func NewBlockChain() *BlockChain {    genesisBlock := GenerateGenesisBlock()    blockchain := BlockChain{}    blockchain.ApendBlock(&genesisBlock)    return &blockchain} func (bc *BlockChain) SendData(data string){     preBlock := bc.Blocks[len(bc.Blocks)-1 ]    newBlock := GenerateNewBlock(*preBlock,data)    bc.ApendBlock(&newBlock)} func (bc *BlockChain)  ApendBlock(newBlock *Block){    if len(bc.Blocks) == 0{        bc.Blocks = append(bc.Blocks,newBlock)        return    }    if  isValid(*newBlock,*bc.Blocks[len(bc.Blocks)-1]){            bc.Blocks =  append(bc.Blocks,newBlock)        }else{            log.Fatal("invalid block")    }} func (bc *BlockChain) Print(){    for _,block := range bc.Blocks{        fmt.Printf("Index:%d\n",block.Index)        fmt.Printf("Pre.Hash:%s\n",block.PreBlockHash)        fmt.Printf("Curr.Hash:%s\n",block.Hash)        fmt.Printf("Data:%s\n",block.Data)        fmt.Printf("TimeStamp:%d\n",block.Timestamp)    }} func isValid(newBlock Block,oldBlack Block) bool{     if newBlock.Index - 1 != oldBlack.Index {        return false    }    if newBlock.PreBlockHash != oldBlack.Hash{        return false    }    if calculateHash(newBlock) != newBlock.Hash{        return false    }    return true}

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