@digitalcredentials/ed25519-verification-key-2020/dist/validators.js

Javascript library for generating and working with Ed25519VerificationKey2020 key pairs, for use with crypto-ld.

/*!
 * Copyright (c) 2022 Digital Credentials Consortium. (Conversion to Typescript)
 * Copyright (c) 2022 Digital Bazaar, Inc. All rights reserved.
 */
/**
 * Asserts that key bytes have a type of Uint8Array and a specific length.
 *
 * @throws {TypeError|SyntaxError} - Throws a Type or Syntax error.
 *
 * @param {object} options - Options to use.
 * @param {Uint8Array} options.bytes - The bytes being checked.
 * @param {number} [options.expectedLength=32] - The expected bytes length.
 * @param {string} [options.code] - An optional code for the error.
 *
 * @returns {undefined} Returns on success throws on error.
 */
export function assertKeyBytes({ bytes, expectedLength = 32, code }) {
    if (!(bytes instanceof Uint8Array)) {
        throw new TypeError('"bytes" must be a Uint8Array.');
    }
    if (bytes.length !== expectedLength) {
        const error = new Error(`"bytes" must be a ${expectedLength}-byte Uint8Array.`);
        // we need DataError for invalid byte length
        error.name = 'DataError';
        // add the error code from the did:key spec if provided
        if (code) {
            // @ts-ignore
            error.code = code;
        }
        throw error;
    }
}
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