区块链中的应用价值与GoLang相关

package main

import (
    "fmt"
)

func concurrentTask(a int, b int) {
    /* 这里是任务处理逻辑 */
    result := a + b
    fmt.Println("任务的结果是：", result)
}

func main() {
    go concurrentTask(3, 5) // 启动协程处理任务

    /* 程序继续执行其他任务 */

    /* 避免程序提前退出 */
    for {}
}

package main

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

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

func calculateHash(index int, timestamp string, data string, prevHash string) string {
    value := string(index) + timestamp + data + prevHash
    hash := sha256.Sum256([]byte(value))
    return hex.EncodeToString(hash[:])
}

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.Index, newBlock.Timestamp, newBlock.Data, newBlock.PrevHash)
    return newBlock
}

func main() {
    genesisBlock := Block{0, time.Now().String(), "Genesis Block", "", ""}
    blockChain := []Block{genesisBlock}

    newBlock := generateBlock(blockChain[len(blockChain)-1], "Data for Block 1")
    blockChain = append(blockChain, newBlock)

    fmt.Println("BlockChain:", blockChain)
}