eip-712/src/utils/abi.test.ts

Tiny library with utility functions that can help with signing and verifying EIP-712 based messages

import { bytesToHex } from '@noble/hashes/utils';
import { encode } from './abi';

describe('encode', () => {
  it('encodes types and values to ABI', () => {
    expect(bytesToHex(encode(['uint256', 'uint256'], [12345, 56789]))).toBe(
      '0000000000000000000000000000000000000000000000000000000000003039000000000000000000000000000000000000000000000000000000000000ddd5'
    );
    expect(bytesToHex(encode(['bytes32', 'string'], ['0x123456789', 'foo bar']))).toBe(
      '123456780000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000007666f6f2062617200000000000000000000000000000000000000000000000000'
    );
  });
});