簡介

這是一個Bip44確定性演算法的Java實現庫（Android和java平臺，都可以使用），可以生成12個助記詞，seed種子和根據path路徑生成路徑的私鑰.

對Bip44確定演算法不瞭解的可以看我之前的一篇文章：區塊鏈開發之確定性演算法bip32，bip39，bip44

專案地址：https://github.com/wypeng2012/Bip44ForJava

歡迎star

- 如何使用

程式碼:

                    //get 12 words
                    List<
 
String> words = Bip44Utils.generateMnemonicWords();
                    System.out.println("words: " + words.toString());

                    // get bip39 seed
                    byte[] seed = Bip44Utils.getSeed(words);
                    System.out.println("seed: " + new BigInteger(1,seed).toString
 
(16));

                    //get PrivateKey by path
                    BigInteger pri1 = Bip44Utils.getPathPrivateKey(words,"m/44'/194'/0'/0/0");
                    System.out.println("pri1: " + pri1.toString(16));

                    BigInteger pri2 = Bip44Utils.getPathPrivateKey(words,seed,"m/44'/194'/0'/0/0");
 

                    System.out.println("pri2: " + pri2.toString(16));

                    byte[] pri3 = Bip44Utils.getPathPrivateKeyBytes(words, "m/44'/194'/0'/0/0");
                    System.out.println("pri3: " + new BigInteger(1,pri3).toString(16));

                    byte[] pri4 = Bip44Utils.getPathPrivateKeyBytes(words, seed,"m/44'/194'/0'/0/0");
                    System.out.println("pri4: " + new BigInteger(1,pri4).toString(16));

                    byte[] pri5 = Bip44Utils.getDefaultPathPrivateKeyBytes(words, 194);
                    System.out.println("pri5: " + new BigInteger(1,pri5).toString(16));

                    //if you use bitcoinj library,you can generate bitcoin privatekey and public key and address like this:

                    BigInteger pribtc = Bip44Utils.getPathPrivateKey(words,"m/44'/0'/0'/0/0");

                    ECKey ecKey = ECKey.fromPrivate(pribtc);

	                String publicKey = ecKey.getPublicKeyAsHex();
	                String privateKey = ecKey.getPrivateKeyEncoded(networkParameters).toString();
	                String address = ecKey.toAddress(networkParameters).toString();


                    //if you use web3j library,you can generate bitcoin privatekey and public key and address like this:

					BigInteger prieth = Bip44Utils.getPathPrivateKey(words,"m/44'/60'/0'/0/0");

                    ECKeyPair ecKeyPair = ECKeyPair.create(prieth);

	                String publicKey = Numeric.toHexStringWithPrefix(ecKeyPair.getPublicKey());
	                String privateKey = Numeric.toHexStringWithPrefix(ecKeyPair.getPrivateKey());
	                String address = "0x" + Keys.getAddress(ecKeyPair);
                    

列印結果:

words: [course, question, calm, west, basket, kitten, salmon, absorb, tool, ankle, mixed, endorse]

seed: c03f5488370482658066b96a803fcceac46b68181024a545d814344cbf7d9da9b478a20d0b95ebef268b7c24afd4540c59a4567146d45d2db891ca2576d409c7

pri1: 6ef7a396546d4fcf26865e54033ad48db858d19b5a08782014a652f4b5469037

pri2: 6ef7a396546d4fcf26865e54033ad48db858d19b5a08782014a652f4b5469037

pri3: 6ef7a396546d4fcf26865e54033ad48db858d19b5a08782014a652f4b5469037

pri4: 6ef7a396546d4fcf26865e54033ad48db858d19b5a08782014a652f4b5469037

pri5: 6ef7a396546d4fcf26865e54033ad48db858d19b5a08782014a652f4b5469037

- 遠端依賴

1. Maven

<dependency>
  <groupId>party.52it</groupId>
  <artifactId>Bip44ForJava</artifactId>
  <version>1.0.0</version>
</dependency>

2. Gradle

compile 'party.52it:Bip44ForJava:1.0.0'

or

implementation 'party.52it:Bip44ForJava:1.0.0'

3. Ivy

<dependency org='party.52it' name='Bip44ForJava' rev='1.0.0'/>

- coin_type link

https://github.com/satoshilabs/slips/blob/master/slip-0044.md