@helium/crypto/build/Keypair.js

Cryptography utilities including mnemonics, keypairs and base58-check encoding

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
const ed25519_1 = require("@noble/curves/ed25519");
const address_1 = __importStar(require("@helium/address"));
const Mnemonic_1 = __importDefault(require("./Mnemonic"));
const { ED25519_KEY_TYPE } = address_1.KeyTypes;
const { MAINNET } = address_1.NetTypes;
class Keypair {
    constructor(keypair, netType) {
        this.keypair = keypair;
        this.publicKey = keypair.publicKey;
        this.privateKey = new Uint8Array(64);
        this.privateKey.set(keypair.privateKey, 0);
        this.privateKey.set(keypair.publicKey, 32);
        this.keyType = keypair.keyType || 'ed25519';
        this.netType = netType || MAINNET;
    }
    get address() {
        return new address_1.default(0, this.netType, ED25519_KEY_TYPE, this.publicKey);
    }
    static async makeRandom(netType) {
        const privateKey = ed25519_1.ed25519.utils.randomPrivateKey();
        const publicKey = ed25519_1.ed25519.getPublicKey(privateKey);
        const keypair = {
            publicKey,
            privateKey,
        };
        return new Keypair(keypair, netType);
    }
    static async fromWords(words, netType) {
        const mnenomic = new Mnemonic_1.default(words);
        const keypair = await this.fromMnemonic(mnenomic, netType);
        return keypair;
    }
    static async fromMnemonic(mnenomic, netType) {
        const entropy = mnenomic.toEntropy();
        const seed = entropy.length === 16 ? Buffer.concat([entropy, entropy]) : entropy;
        return Keypair.fromEntropy(seed, netType);
    }
    static async fromEntropy(entropy, netType) {
        const entropyBuffer = Buffer.from(entropy);
        if (Buffer.byteLength(entropyBuffer) !== 32)
            throw new Error('Invalid entropy, must be 32 bytes');
        const privateKey = entropyBuffer;
        const publicKey = ed25519_1.ed25519.getPublicKey(privateKey);
        const keypair = {
            publicKey,
            privateKey,
        };
        return new Keypair(keypair, netType);
    }
    async sign(message) {
        const messageBuffer = Buffer.from(message);
        const actualPrivateKey = this.privateKey.slice(0, 32);
        const signature = ed25519_1.ed25519.sign(messageBuffer, actualPrivateKey);
        return signature;
    }
}
exports.default = Keypair;
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