用web3j创建帐户

Question

我试图使用web3j库创建一个帐户。但我找不到创建账户的方法。我的想法是做出这样的判断，但不是在Geth控制台，而是在使用web3j的Java应用程序中：

geth帐户新

有什么想法吗？

我是新来的，直到现在，我没有产生钱包，因为我没有使用聪明的合同。我的想法就是用de应用程序创建帐户，并在私有链中对eth进行简单的转换。

谢谢

Answer 1

使用Web3j (3.4.0)，可以通过两个步骤实现这一点：

1. 生成密钥对Keys.createEcKeyPair()
2. 创建钱包Wallet.createStandard(seed, keyPair)

示例：

public static void main(String[] args) {

    try {
        String password = "secr3t";
        ECKeyPair keyPair = Keys.createEcKeyPair();
        WalletFile wallet = Wallet.createStandard(password, keyPair);

        System.out.println("Priate key: " + keyPair.getPrivateKey().toString(16));
        System.out.println("Account: " + wallet.getAddress());

    } catch(Exception e) {
        System.err.println("Error: " + e.getMessage());
    }

}

编辑:创建钱包文件

String fileName = WalletUtils.generateNewWalletFile(
        "secr3t",
        new File("/path/to/destination"));

Answer 2

我做了这个：

public class MainActivity extends AppCompatActivity {
    private WalletFile wallet;
    private String password = "PASSWORD";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        setupBouncyCastle();


        try {
            wallet = createWallet();
        } catch (Exception e) {
            System.out.println("BIG RIP");
        }
    }


    public WalletFile createWallet() throws Exception {
        ECKeyPair keyPair = Keys.createEcKeyPair();
        return Wallet.createLight(password, keyPair);

    }


    private void setupBouncyCastle() {
        final Provider provider = Security.getProvider(BouncyCastleProvider.PROVIDER_NAME);
        if (provider == null) {
            // Web3j will set up the provider lazily when it's first used.
            return;
        }
        if (provider.getClass().equals(BouncyCastleProvider.class)) {
            // BC with same package name, shouldn't happen in real life.
            return;
        }
        // Android registers its own BC provider. As it might be outdated and might not include
        // all needed ciphers, we substitute it with a known BC bundled in the app.
        // Android's BC has its package rewritten to "com.android.org.bouncycastle" and because
        // of that it's possible to have another BC implementation loaded in VM.
        Security.removeProvider(BouncyCastleProvider.PROVIDER_NAME);
        Security.insertProviderAt(new BouncyCastleProvider(), 1);
    }
}

由于某种原因，创建带有路径的钱包会不断抛出错误。我的部分代码是从：https://github.com/serso/web3a/blob/4dda74db948f8cbd9a79ba4b9ab456316ea52c4d/app/src/main/java/org/solovyev/android/web3a/App.java#L47复制的，因为新版本的web3j在创建ECKeyPair时会抛出错误。