Golang在区块链领域的独特优势剖析

package main

import (
    "crypto/sha256"
    "encoding/hex"
    "fmt"
    "time"
)

type Block struct {
    Index     int
    Timestamp string
    Data      string
    PrevHash  string
    Hash      string
}

func calculateHash(block Block) string {
    record := string(block.Index) + block.Timestamp + block.Data + block.PrevHash
    h := sha256.New()
    h.Write([]byte(record))
    hashed := h.Sum(nil)
    return hex.EncodeToString(hashed)
}

func generateBlock(prevBlock Block, data string) Block {
    var newBlock Block
    newBlock.Index = prevBlock.Index + 1
    newBlock.Timestamp = time.Now().String()
    newBlock.Data = data
    newBlock.PrevHash = prevBlock.Hash
    newBlock.Hash = calculateHash(newBlock)
    return newBlock
}

func isBlockValid(newBlock, prevBlock Block) bool {
    if prevBlock.Index+1 != newBlock.Index {
        return false
    }
    if prevBlock.Hash != newBlock.PrevHash {
        return false
    }
    if calculateHash(newBlock) != newBlock.Hash {
        return false
    }
    return true
}

func main() {
    var blockchain []Block
    genesisBlock := Block{0, time.Now().String(), "Genesis Block", "", ""}
    genesisBlock.Hash = calculateHash(genesisBlock)
    blockchain = append(blockchain, genesisBlock)

    newBlock := generateBlock(blockchain[0], "Data of Block 1")
    blockchain = append(blockchain, newBlock)

    fmt.Println("Block 1 is valid:", isBlockValid(blockchain[1], blockchain[0]))
}