import { getAddress, isAddress, ZeroAddress } from "ethers";

const normalizedAddress = (value: string, label: string): string => {
  const candidate = value.trim();
  if (!isAddress(candidate) || getAddress(candidate) === ZeroAddress) {
    throw new Error(`${label} must be a valid non-zero EVM address`);
  }
  return getAddress(candidate);
};

export const assertExecutionSignerAddress = (
  actualAddress: string,
  expectedTaskAddress?: string,
): string => {
  const actual = normalizedAddress(actualAddress, "execution signer");
  if (expectedTaskAddress === undefined) return actual;
  const expected = normalizedAddress(expectedTaskAddress, "deployment signer address");
  if (actual.toLowerCase() !== expected.toLowerCase()) {
    throw new Error("execution signer does not match deployment signer address");
  }
  return actual;
};