Function normalizeHexString

packages/hardhat-utils/src/hex.ts:135–145

(hexString: string)

 * @returns The normalized hexadecimal string.
 */
export function normalizeHexString(hexString: string): PrefixedHexString {
  const normalizedHexString = hexString.trim().toLowerCase();

  if (!isHexString(normalizedHexString)) {
    throw new InvalidParameterError(
      `Expected a valid hexadecimal string. Received: ${hexString}`,
    );
  }

  return getPrefixedHexString(normalizedHexString);
}

/**
 * Checks if a string starts with "0x" (case-insensitive).