区块链原理实现 Go

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 }
后续补充优化~~

热门工具换一换

区块链 原理实现 Go