前言

提示：以下是本篇文章正文内容，下面案例可供参考

一、区块链简单实现

package Blockimport ("crypto/sha256""encoding/hex""fmt""strconv""strings""time"
)type Block struct{PreHash stringHashCode stringTimeStamp stringDiff intData stringIndex intNonce int
}
func GenerateFirstBlock(data string) Block {var firstblock Blockfirstblock.PreHash = "0"firstblock.TimeStamp = time.Now().String()firstblock.Diff = 4firstblock.Data = datafirstblock.Index = 1firstblock.Nonce = 0firstblock.HashCode = GenerationHashValue(firstblock)return firstblock
}func GenerationHashValue(block Block) string{var hashdata = strconv.Itoa(block.Nonce)+strconv.Itoa(block.Diff)+strconv.Itoa(block.Index)+block.TimeStampvar sha = sha256.New()sha.Write([]byte(hashdata))hashed := sha.Sum(nil)return hex.EncodeToString(hashed)
}func GenerationNextBlock(data string,oldBlock Block) Block {var newBlock BlocknewBlock.TimeStamp = time.Now().String()newBlock.Diff = 4newBlock.Index = 2newBlock.Data = datanewBlock.PreHash = oldBlock.HashCodenewBlock.Nonce = 0newBlock.HashCode = pow(newBlock.Diff,&newBlock)return newBlock
}func pow(diff int,block *Block) string{for{hash := GenerationHashValue(*block)fmt.Println(hash)if strings.HasPrefix(hash, strings.Repeat("0", diff)){//挖矿成功fmt.Println("挖矿成功")return hash} else {//没挖到//随机值自增block.Nonce++}}
}

package Blockchainimport ("demo2/Block""fmt"
)type  Node struct {NextNode *NodeData *Block.Block
}func CreateHeaderNode(data *Block.Block) *Node {var headerNode = new(Node)headerNode.NextNode = nilheaderNode.Data=datareturn headerNode}
func AddNode(data *Block.Block,node *Node) *Node{var newNode = new(Node)newNode.NextNode=nilnewNode.Data=datanode.NextNode = newNodereturn newNode
}func ShowNodes(node *Node){n := nodefor{if n.NextNode == nil{fmt.Println(n.Data)break}else{fmt.Println(n.Data)n = n.NextNode}}
}