首先要生成12个助记词,请看我上篇文章:区块链开发之生成12个助记词
implementation ‘org.bitcoinj:bitcoinj-core:0.14.7’
implementation ‘org.web3j:core:3.3.1-android’
public static ShellWallet generateWallet(int coinType, int index, String name) throws Exception {
ShellWallet wallet = null;
if (words == null || words.size() != 12) {
throw new RuntimeException("please generateMnemonic first");
} else {
DeterministicSeed deterministicSeed = new DeterministicSeed(words, null, "", 0);
DeterministicKeyChain deterministicKeyChain = DeterministicKeyChain.builder().seed(deterministicSeed).build();
//拼接路径 path = "m/44'/60'/0'/0/0"
String path = null;
if (coinType == BTC_COIN) {
path = "m/44'/0'/0'/0/" + index;
NetworkParameters networkParameters = null;
if (!BTC_TEST_NET) {
networkParameters = MainNetParams.get();
} else {
networkParameters = TestNet3Params.get();
path = "m/44'/1'/0'/0/" + index;
}
BigInteger privkeybtc = deterministicKeyChain.getKeyByPath(parsePath(path), true).getPrivKey();
ECKey ecKey = ECKey.fromPrivate(privkeybtc);
//String publicKey = Numeric.toHexStringNoPrefixZeroPadded(new BigInteger(ecKey.getPubKey()), 66);
//LogUtils.d("pub1:" + publicKey );
String publicKey = ecKey.getPublicKeyAsHex();
LogUtils.d("pub2:" + publicKey);
String privateKey = ecKey.getPrivateKeyEncoded(networkParameters).toString();
String address = ecKey.toAddress(networkParameters).toString();
wallet = new ShellWallet(index, coinType, privateKey, publicKey, address, name);
LogUtils.d(wallet.toString());
} else if (coinType == ETH_COIN) {
path = "m/44'/60'/0'/0/" + index;
BigInteger privkeyeth = deterministicKeyChain.getKeyByPath(parsePath(path), true).getPrivKey();
ECKeyPair ecKeyPair = ECKeyPair.create(privkeyeth);
String publicKey = Numeric.toHexStringWithPrefix(ecKeyPair.getPublicKey());
String privateKey = Numeric.toHexStringWithPrefix(ecKeyPair.getPrivateKey());
String address = "0x" + Keys.getAddress(ecKeyPair);
wallet = new ShellWallet(index, coinType, privateKey, publicKey, address, name);
LogUtils.d(wallet.toString());
}
}
return wallet;
}
/** * The path is a human-friendly representation of the deterministic path. For example: * <p> * "m/44'/0'/0'/0/0" * <p> * Where a letter "'" means hardened key. Spaces are ignored. */
public static List<ChildNumber> parsePath(@Nonnull String path) {
String[] parsedNodes = path.replace("m", "").split("/");
List<ChildNumber> nodes = new ArrayList<>();
for (String n : parsedNodes) {
n = n.replaceAll(" ", "");
if (n.length() == 0) continue;
boolean isHard = n.endsWith("'");
if (isHard) n = n.substring(0, n.length() - 1);
int nodeNumber = Integer.parseInt(n);
nodes.add(new ChildNumber(nodeNumber, isHard));
}
return nodes;
}