// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract GenericReceiver {
  bool public s_toRevert;
  bytes private s_err;

  constructor(
    bool toRevert
  ) {
    s_toRevert = toRevert;
  }

  function setRevert(
    bool toRevert
  ) external {
    s_toRevert = toRevert;
  }

  function setErr(
    bytes memory err
  ) external {
    s_err = err;
  }

  // solhint-disable-next-line payable-fallback
  fallback() external {
    if (s_toRevert) {
      bytes memory reason = s_err;
      assembly {
        revert(add(32, reason), mload(reason))
      }
    }
  }
}