@polkadot/util-crypto
Version:
A collection of useful crypto utilities for @polkadot
38 lines (37 loc) • 1.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.mnemonicToLegacySeed = mnemonicToLegacySeed;
const util_1 = require("@polkadot/util");
const wasm_crypto_1 = require("@polkadot/wasm-crypto");
const bip39_js_1 = require("./bip39.js");
const validate_js_1 = require("./validate.js");
/**
* @name mnemonicToLegacySeed
* @summary Creates a valid Ethereum/Bitcoin-compatible seed from a mnemonic input
* @example
* <BR>
*
* ```javascript
* import { mnemonicGenerate, mnemonicToLegacySeed, mnemonicValidate } from '@polkadot/util-crypto';
*
* const mnemonic = mnemonicGenerate(); // => string
* const isValidMnemonic = mnemonicValidate(mnemonic); // => boolean
*
* if (isValidMnemonic) {
* console.log(`Seed generated from mnemonic: ${mnemonicToLegacySeed(mnemonic)}`); => u8a
* }
* ```
*/
function mnemonicToLegacySeed(mnemonic, password = '', onlyJs, byteLength = 32) {
if (!(0, validate_js_1.mnemonicValidate)(mnemonic)) {
throw new Error('Invalid bip39 mnemonic specified');
}
else if (![32, 64].includes(byteLength)) {
throw new Error(`Invalid seed length ${byteLength}, expected 32 or 64`);
}
return byteLength === 32
? !util_1.hasBigInt || (!onlyJs && (0, wasm_crypto_1.isReady)())
? (0, wasm_crypto_1.bip39ToSeed)(mnemonic, password)
: (0, bip39_js_1.mnemonicToSeedSync)(mnemonic, password).subarray(0, 32)
: (0, bip39_js_1.mnemonicToSeedSync)(mnemonic, password);
}