GO语言创建钱包并遍历钱包(wallet)的实现代码

func (cli *CLI) createWallet(nodeID string) {     //创建钱包的主函数
    wallets, _ := NewWallets(nodeID)   
    address := wallets.CreateWallet()
    wallets.SaveToFile(nodeID)

    fmt.Printf("Your new address: %s\n", address)
}

func NewWallets(nodeID string) (*Wallets, error) {
    wallets := Wallets{}
    wallets.Wallets = make(map[string]*Wallet)
    err := wallets.LoadFromFile(nodeID)
    return &wallets, err
}

type Wallets struct {
    Wallets map[string]*Wallet
}
type Wallet struct {
    PrivateKey ecdsa.PrivateKey
    PublicKey  []byte
}
func (ws *Wallets) LoadFromFile(nodeID string) error {
    walletFile := fmt.Sprintf(walletFile, nodeID)    
    if _, err := os.Stat(walletFile); os.IsNotExist(err) {   //判断文件是否存在
        return err
    }

    fileContent, err := ioutil.ReadFile(walletFile)
    // ReadFile 读取文件中的所有数据，返回读取的数据和遇到的错误。
    //如果读取成功，则 err 返回 nil，而不是 EOF
func ReadFile(filename string) ([]byte, error)
    if err != nil {
        log.Panic(err)
    }

    var wallets Wallets
    gob.Register(elliptic.P256())
    //gob是Golang包自带的一个数据结构序列化的编码/解码工具。
    decoder := gob.NewDecoder(bytes.NewReader(fileContent))
    err = decoder.Decode(&wallets)//这里应该是一个解码的过程
    if err != nil {
        log.Panic(err)
    }
    ws.Wallets = wallets.Wallets
    return nil
}

unc (ws *Wallets) CreateWallet() string {
    wallet := NewWallet()
    address := fmt.Sprintf("%s", wallet.GetAddress())
    ws.Wallets[address] = wallet  //存储到钱包集合中
    return address
}
func NewWallet() *Wallet {
    private, public := newKeyPair()   //得到公钥和私钥
    wallet := Wallet{private, public}  //存储到钱包结构体
    return &wallet
}
func newKeyPair() (ecdsa.PrivateKey, []byte) {
    curve := elliptic.P256()
    private, err := ecdsa.GenerateKey(curve, rand.Reader)
    if err != nil {
        log.Panic(err)
    }
    pubKey := append(private.PublicKey.X.Bytes(), private.PublicKey.Y.Bytes()...)
    return *private, pubKey
}

//由公钥得到地址，具体方法见我的博客用 [“go语言实现比特币地址校验”](https://blog.csdn.net/m0_37719047/article/details/81945896) 
func (w Wallet) GetAddress() []byte {     
    pubKeyHash := HashPubKey(w.PublicKey)  
    versionedPayload := append([]byte{version}, pubKeyHash...)
    checksum := checksum(versionedPayload)
    fullPayload := append(versionedPayload, checksum...)
    address := Base58Encode(fullPayload)
    return address
}

func (ws Wallets) SaveToFile(nodeID string) {
    var content bytes.Buffer     //开辟一个内存空间
    walletFile := fmt.Sprintf(walletFile, nodeID)
    gob.Register(elliptic.P256())
    encoder := gob.NewEncoder(&content)    //序列化结构体
    err := encoder.Encode(ws)
    if err != nil {
        log.Panic(err)
    }
    err = ioutil.WriteFile(walletFile, content.Bytes(), 0644)    //将序列化的数据写入到文件中去
    if err != nil {
        log.Panic(err)
    }
}

func (cli *CLI) listAddresses(nodeID string) {
    wallets, err := NewWallets(nodeID)   //加载现有的钱包集合
    if err != nil {
        log.Panic(err)
    }
    addresses := wallets.GetAddresses()
    for _, address := range addresses {
        fmt.Println(address)
    }
}
func (ws *Wallets) GetAddresses() []string {
    var addresses []string
    for address := range ws.Wallets {
        addresses = append(addresses, address)
    }
    return addresses
}