ブロックチェーン技術分野におけるGolangの応用研究

package main

import (
    "fmt"
    "net/http"
    "github.com/gorilla/mux"
)

func handleGetBlockchain(w http.ResponseWriter, r *http.Request) {
    // 返回区块链信息的逻辑
}

func main() {
    router := mux.NewRouter()
    router.HandleFunc("/blockchain", handleGetBlockchain).Methods("GET")
    
    http.Handle("/", router)
    
    fmt.Println("Starting server on port 8080...")
    http.ListenAndServe(":8080", nil)
}

package main

import (
    "crypto/sha256"
    "encoding/hex"
    "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
}

package main

import (
    "sync"
    "time"
)

type Blockchain struct {
    Blocks []*Block
}

var mutex = &sync.Mutex{}

func (bc *Blockchain) IsValid() bool {
    for i := 1; i < len(bc.Blocks); i++ {
        if bc.Blocks[i].Hash != calculateHash(*bc.Blocks[i]) {
            return false
        }
        if bc.Blocks[i].PrevHash != bc.Blocks[i-1].Hash {
            return false
        }
    }
    return true
}

func main() {
    var bc Blockchain
    genesisBlock := Block{0, time.Now().String(), "Genesis Block", "", ""}
    genesisBlock.Hash = calculateHash(genesisBlock)
    bc.Blocks = append(bc.Blocks, &genesisBlock)

    block1 := generateBlock(*bc.Blocks[len(bc.Blocks)-1], "Transaction Data")
    if isValidBlock(*bc.Blocks[len(bc.Blocks)-1], block1) {
        mutex.Lock()
        bc.Blocks = append(bc.Blocks, &block1)
        mutex.Unlock()
    }
}