接下来，我们将实现创建钱包的功能。我们将生成一个新的私钥，并将其转换为以太坊账户对象。然后，我们将检查该账户是否已经存在，并在以太坊网络中创建账户。
package main
import (
"context"
"fmt"
"log"
"math/big"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
)
func main() {
// 连接以太坊节点
client, err := ethclient.Dial("https://mainnet.infura.io/v3/your\_infura\_project\_id")
if err != nil {
log.Fatal(err)
}
// 创建钱包
wallet, err := createWallet(client)
if err != nil {
log.Fatal(err)
}
fmt.Println("Wallet Address:", wallet.Address.Hex())
fmt.Println("Private Key:", wallet.PrivateKey)
}
func createWallet(client \*ethclient.Client) (\*accounts.Account, error) {
// 生成私钥
privateKey, err := crypto.GenerateKey()
if err != nil {
return nil, err
}
// 将私钥转换为账户对象
account := accounts.Account{PrivateKey: privateKey}
// 检查账户是否已存在
exists, err := accountExists(client, account.Address)
if err != nil {
return nil, err
}
if exists {
return nil, fmt.Errorf("Account already exists")
}
// 在以太坊网络中创建账户
err = createAccount(client, account)
if err != nil {
return nil, err
}
return &account, nil
}
func accountExists(client \*ethclient.Client, address common.Address) (bool, error) {
balance, err := client.BalanceAt(context.Background(), address, nil)
if err != nil {
if err == ethereum.NotFound {
return false, nil
}
return false, err
}
return balance.Cmp(big.NewInt(0)) > 0, nil
}
func createAccount(client \*ethclient.Client, account accounts.Account) error {
pwd := "your\_password" // 设置账户密码
ks := accounts.NewInMemoryKeystore()
err := ks.Unlock(account, pwd)
if err != nil {
return err
}
err = client.Backend().Wallet().Signer(ks, account.Address, crypto.PubkeyToAddress(account.PrivateKey.PublicKey))
if err != nil {
return err
}
return nil
}
在上述代码中，我们首先生成一个随机的私钥，并将其转换为以太坊账户对象。然后，我们使用accountExists函数检查账户是否已存在。如果账户不存在，则通过createAccount函数在以太坊网络中创建账户。
步骤3：账户管理和交易
我们已经成功创建了以太坊钱包，现在让我们继续实现账户管理和交易功能。我们将实现以下功能：
- 查看账户余额
- 发送以太币到另一个账户
package main
import (
"context"
"fmt"
"log"
"math/big"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
)
func main() {
// 连接以太坊节点
client, err := ethclient.Dial("https://mainnet.infura.io/v3/your\_infura\_project\_id")
if err != nil {
log.Fatal(err)
}
// 创建钱包
wallet, err := createWallet(client)
if err != nil {
log.Fatal(err)
}
fmt.Println("Wallet Address:", wallet.Address.Hex())
fmt.Println("Private Key:", wallet.PrivateKey)
// 查看账户余额
balance, err := getBalance(client, wallet.Address)
if err != nil {
log.Fatal(err)
}
fmt.Println("Account Balance:", balance)
// 发送以太币到另一个账户
recipient := common.HexToAddress("0xrecipient\_address")
amount := big.NewInt(1000000000000000000) // 1 ETH
txHash, err := sendTransaction(client, wallet, recipient, amount)
if err != nil {
log.Fatal(err)
}
fmt.Println("Transaction Hash:", txHash.Hex())
}
func getBalance(client \*ethclient.Client, address common.Address) (\*big.Int, error) {
balance, err := client.BalanceAt(context.Background(), address, nil)
if err != nil {
return nil, err
}
return balance, nil
}
func sendTransaction(client \*ethclient.Client, wallet \*accounts.Account, recipient common.Address, amount \*big.Int) (\*common.Hash, error) {
pwd := "your\_password" // 输入账户密码
ks := accounts.NewInMemoryKeystore()
err := ks.Unlock(\*wallet, pwd)
if err != nil {
return nil, err
}
nonce, err := client.PendingNonceAt(context.Background(), wallet.Address)
if err != nil {
return nil, err
}
gasPrice, err := client.SuggestGasPrice(context.Background())
if err != nil {
return nil, err
}
tx := types.NewTransaction(nonce, recipient, amount, gasLimit, gasPrice, nil)
signer := types.NewEIP155Signer(chainID)
signedTx, err := types.SignTx(tx, signer, wallet.PrivateKey)
if err != nil {
return nil, err
}
err = client.SendTransaction(context.Background(), signedTx)
if err != nil {
return nil, err
}
return &signedTx.Hash(), nil
}
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