hyperlane-monorepo/solidity/abacus-core/test/lib/utils.ts

import { ethers } from 'ethers';
import { Address } from './types';

/*
 * Gets the byte length of a hex string
 *
 * @param hexStr - the hex string
 * @return byteLength - length in bytes
 */
export function getHexStringByteLength(hexStr: string) {
  let len = hexStr.length;

  // check for prefix, remove if necessary
  if (hexStr.slice(0, 2) == '0x') {
    len -= 2;
  }

  // divide by 2 to get the byte length
  return len / 2;
}

/*
 * Converts address to Bytes32
 *
 * @param address - the address
 * @return The address as bytes32
 */
export function toBytes32(address: Address): string {
  return '0x' + '00'.repeat(12) + address.slice(2);
}

export const stringToBytes32 = (s: string): string => {
  const str = Buffer.from(s.slice(0, 32), 'utf-8');
  const result = Buffer.alloc(32);
  str.copy(result);

  return '0x' + result.toString('hex');
};

export function addressToBytes32(address: Address): string {
  return ethers.utils
    .hexZeroPad(ethers.utils.hexStripZeros(address), 32)
    .toLowerCase();
}