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• [DIR] ..
• [FILE] _wordlists.js
• [FILE] index.js
• [DIR] wordlists

Просмотр файла: index.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const sha256_1 = require("@noble/hashes/sha256");
const sha512_1 = require("@noble/hashes/sha512");
const pbkdf2_1 = require("@noble/hashes/pbkdf2");
const utils_1 = require("@noble/hashes/utils");
const _wordlists_1 = require("./_wordlists");
let DEFAULT_WORDLIST = _wordlists_1._default;
const INVALID_MNEMONIC = 'Invalid mnemonic';
const INVALID_ENTROPY = 'Invalid entropy';
const INVALID_CHECKSUM = 'Invalid mnemonic checksum';
const WORDLIST_REQUIRED = 'A wordlist is required but a default could not be found.\n' +
    'Please pass a 2048 word array explicitly.';
function normalize(str) {
    return (str || '').normalize('NFKD');
}
function lpad(str, padString, length) {
    while (str.length < length) {
        str = padString + str;
    }
    return str;
}
function binaryToByte(bin) {
    return parseInt(bin, 2);
}
function bytesToBinary(bytes) {
    return bytes.map((x) => lpad(x.toString(2), '0', 8)).join('');
}
function deriveChecksumBits(entropyBuffer) {
    const ENT = entropyBuffer.length * 8;
    const CS = ENT / 32;
    const hash = sha256_1.sha256(Uint8Array.from(entropyBuffer));
    return bytesToBinary(Array.from(hash)).slice(0, CS);
}
function salt(password) {
    return 'mnemonic' + (password || '');
}
function mnemonicToSeedSync(mnemonic, password) {
    const mnemonicBuffer = Uint8Array.from(Buffer.from(normalize(mnemonic), 'utf8'));
    const saltBuffer = Uint8Array.from(Buffer.from(salt(normalize(password)), 'utf8'));
    const res = pbkdf2_1.pbkdf2(sha512_1.sha512, mnemonicBuffer, saltBuffer, {
        c: 2048,
        dkLen: 64,
    });
    return Buffer.from(res);
}
exports.mnemonicToSeedSync = mnemonicToSeedSync;
function mnemonicToSeed(mnemonic, password) {
    const mnemonicBuffer = Uint8Array.from(Buffer.from(normalize(mnemonic), 'utf8'));
    const saltBuffer = Uint8Array.from(Buffer.from(salt(normalize(password)), 'utf8'));
    return pbkdf2_1.pbkdf2Async(sha512_1.sha512, mnemonicBuffer, saltBuffer, {
        c: 2048,
        dkLen: 64,
    }).then((res) => Buffer.from(res));
}
exports.mnemonicToSeed = mnemonicToSeed;
function mnemonicToEntropy(mnemonic, wordlist) {
    wordlist = wordlist || DEFAULT_WORDLIST;
    if (!wordlist) {
        throw new Error(WORDLIST_REQUIRED);
    }
    const words = normalize(mnemonic).split(' ');
    if (words.length % 3 !== 0) {
        throw new Error(INVALID_MNEMONIC);
    }
    // convert word indices to 11 bit binary strings
    const bits = words
        .map((word) => {
        const index = wordlist.indexOf(word);
        if (index === -1) {
            throw new Error(INVALID_MNEMONIC);
        }
        return lpad(index.toString(2), '0', 11);
    })
        .join('');
    // split the binary string into ENT/CS
    const dividerIndex = Math.floor(bits.length / 33) * 32;
    const entropyBits = bits.slice(0, dividerIndex);
    const checksumBits = bits.slice(dividerIndex);
    // calculate the checksum and compare
    const entropyBytes = entropyBits.match(/(.{1,8})/g).map(binaryToByte);
    if (entropyBytes.length < 16) {
        throw new Error(INVALID_ENTROPY);
    }
    if (entropyBytes.length > 32) {
        throw new Error(INVALID_ENTROPY);
    }
    if (entropyBytes.length % 4 !== 0) {
        throw new Error(INVALID_ENTROPY);
    }
    const entropy = Buffer.from(entropyBytes);
    const newChecksum = deriveChecksumBits(entropy);
    if (newChecksum !== checksumBits) {
        throw new Error(INVALID_CHECKSUM);
    }
    return entropy.toString('hex');
}
exports.mnemonicToEntropy = mnemonicToEntropy;
function entropyToMnemonic(entropy, wordlist) {
    if (!Buffer.isBuffer(entropy)) {
        entropy = Buffer.from(entropy, 'hex');
    }
    wordlist = wordlist || DEFAULT_WORDLIST;
    if (!wordlist) {
        throw new Error(WORDLIST_REQUIRED);
    }
    // 128 <= ENT <= 256
    if (entropy.length < 16) {
        throw new TypeError(INVALID_ENTROPY);
    }
    if (entropy.length > 32) {
        throw new TypeError(INVALID_ENTROPY);
    }
    if (entropy.length % 4 !== 0) {
        throw new TypeError(INVALID_ENTROPY);
    }
    const entropyBits = bytesToBinary(Array.from(entropy));
    const checksumBits = deriveChecksumBits(entropy);
    const bits = entropyBits + checksumBits;
    const chunks = bits.match(/(.{1,11})/g);
    const words = chunks.map((binary) => {
        const index = binaryToByte(binary);
        return wordlist[index];
    });
    return wordlist[0] === '\u3042\u3044\u3053\u304f\u3057\u3093' // Japanese wordlist
        ? words.join('\u3000')
        : words.join(' ');
}
exports.entropyToMnemonic = entropyToMnemonic;
function generateMnemonic(strength, rng, wordlist) {
    strength = strength || 128;
    if (strength % 32 !== 0) {
        throw new TypeError(INVALID_ENTROPY);
    }
    rng = rng || ((size) => Buffer.from(utils_1.randomBytes(size)));
    return entropyToMnemonic(rng(strength / 8), wordlist);
}
exports.generateMnemonic = generateMnemonic;
function validateMnemonic(mnemonic, wordlist) {
    try {
        mnemonicToEntropy(mnemonic, wordlist);
    }
    catch (e) {
        return false;
    }
    return true;
}
exports.validateMnemonic = validateMnemonic;
function setDefaultWordlist(language) {
    const result = _wordlists_1.wordlists[language];
    if (result) {
        DEFAULT_WORDLIST = result;
    }
    else {
        throw new Error('Could not find wordlist for language "' + language + '"');
    }
}
exports.setDefaultWordlist = setDefaultWordlist;
function getDefaultWordlist() {
    if (!DEFAULT_WORDLIST) {
        throw new Error('No Default Wordlist set');
    }
    return Object.keys(_wordlists_1.wordlists).filter((lang) => {
        if (lang === 'JA' || lang === 'EN') {
            return false;
        }
        return _wordlists_1.wordlists[lang].every((word, index) => word === DEFAULT_WORDLIST[index]);
    })[0];
}
exports.getDefaultWordlist = getDefaultWordlist;
var _wordlists_2 = require("./_wordlists");
exports.wordlists = _wordlists_2.wordlists;

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