@bsv/sdk/dist/cjs/src/auth/utils/createNonce.js

BSV Blockchain Software Development Kit

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.createNonce = createNonce;
const Utils = __importStar(require("../../primitives/utils.js"));
const Random_js_1 = __importDefault(require("../../primitives/Random.js"));
/**
 * Creates a nonce derived from a wallet
 * @param wallet
 * @param counterparty - The counterparty to the nonce creation. Defaults to 'self'.
 * @returns A random nonce derived with a wallet
 */
async function createNonce(wallet, counterparty = 'self', originator) {
    // Generate 16 random bytes for the first half of the data
    const firstHalf = (0, Random_js_1.default)(16);
    // Create an sha256 HMAC
    const { hmac } = await wallet.createHmac({
        protocolID: [2, 'server hmac'],
        keyID: Utils.toUTF8(firstHalf),
        data: firstHalf,
        counterparty
    }, originator);
    // Concatenate firstHalf and secondHalf as the nonce bytes
    const nonceBytes = [...firstHalf, ...hmac];
    return Utils.toBase64(nonceBytes);
}
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