polkadot-js/common

// Copyright 2017-2024 @polkadot/util-crypto authors & contributors
// SPDX-License-Identifier: Apache-2.0

/// <reference types="@polkadot/dev-test/globals.d.ts" />

import { stringToU8a } from '@polkadot/util';
import { waitReady } from '@polkadot/wasm-crypto';

import { randomAsU8a } from '../random/asU8a.js';
import { sr25519PairFromSeed } from './pair/fromSeed.js';
import { sr25519Sign } from './sign.js';
import { sr25519Verify } from './verify.js';

const MESSAGE = stringToU8a('this is a message');

describe('verify', (): void => {
  beforeEach(async (): Promise<void> => {
    await waitReady();
  });

  it('can sign and verify a message', (): void => {
    const pair = sr25519PairFromSeed(randomAsU8a());
    const signature = sr25519Sign(MESSAGE, pair);

    expect(sr25519Verify(MESSAGE, signature, pair.publicKey)).toBe(true);
  });

  it('throws error when publicKey lengths do not match', (): void => {
    expect(
      () => sr25519Verify(
        new Uint8Array([0x61, 0x62, 0x63, 0x64]),
        new Uint8Array(64),
        new Uint8Array(31)
      )
    ).toThrow(/Invalid publicKey/);
  });

  it('throws error when signature lengths do not match', (): void => {
    expect(
      () => sr25519Verify(
        new Uint8Array([0x61, 0x62, 0x63, 0x64]),
        new Uint8Array(65),
        new Uint8Array(32)
      )
    ).toThrow(/Invalid signature/);
  });
});