# stellar-hd-wallet for react native

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Key derivation for Stellar ([SEP-0005](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0005.md))

## Usage

```js
import StellarHDWallet from "stellar-hd-wallet";

const mnemonic = StellarHDWallet.generateMnemonic();
const wallet = StellarHDWallet.fromMnemonic(mnemonic);

wallet.getPublicKey(0); // => GDKYMXOAJ5MK4EVIHHNWRGAAOUZMNZYAETMHFCD6JCVBPZ77TUAZFPKT
wallet.getSecret(0); // => SCVVKNLBHOWBNJYHD3CNROOA2P3K35I5GNTYUHLLMUHMHWQYNEI7LVED
wallet.getKeypair(0); // => StellarBase.Keypair for account 0
wallet.derive(`m/44'/148'/0'`); // => raw key for account 0 as a Buffer

// wallet instance from seeds
const seedHex =
  "794fc27373add3ac7676358e868a787bcbf1edfac83edcecdb34d7f1068c645dbadba563f3f3a4287d273ac4f052d2fc650ba953e7af1a016d7b91f4d273378f";
const seedBuffer = Buffer.from(seedHex);
StellarHDWallet.fromSeed(seedHex);
StellarHDWallet.fromSeed(seedBuffer);

// mnemonics with different lengths
StellarHDWallet.generateMnemonic(); // 24 words
StellarHDWallet.generateMnemonic({ entropyBits: 224 }); // 21 words
StellarHDWallet.generateMnemonic({ entropyBits: 160 }); // 18 words
StellarHDWallet.generateMnemonic({ entropyBits: 128 }); // 12 words

// validate a mnemonic
StellarHDWallet.validateMnemonic("too short and non wordlist words"); // false
```

## Mnemonic Language

Mnemonics can be generated in any language supported by the underlying [bip39 npm module](https://github.com/bitcoinjs/bip39).

The full list of language keys are under exports 'wordlists' [here](https://github.com/bitcoinjs/bip39/blob/master/index.js).

### Usage

```js
import StellarHDWallet from "stellar-hd-wallet";

// traditional chinese - 24 words
StellarHDWallet.generateMnemonic({
  language: "chinese_traditional"
});
// => '省 从 唯 芽 激 顿 埋 愤 碳 它 炸 如 青 领 涨 骤 度 牲 朱 师 即 姓 讲 蒋'

// french - 12 words
StellarHDWallet.generateMnemonic({ language: "french", entropyBits: 128 });
// => 'directif terrible légume dérober science vision venimeux exulter abrasif vague mutuel innocent'
```

## Randomness

- NodeJs: crypto.randomBytes
- Browser: window.crypto.getRandomValues

(using [randombytes npm module](https://github.com/crypto-browserify/randombytes))

## Tests

All [SEP-0005 test cases](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0005.md#test-cases) are exercised [here](https://github.com/chatch/stellar-hd-wallet/blob/master/test/sep0005.js) against [these](https://github.com/chatch/stellar-hd-wallet/tree/master/test/data).