// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4 <0.9.0;

import '../../interfaces/utils/IOnlyStealthRelayer.sol';

/*
 * OnlyStealthRelayerAbstract
 */
abstract contract OnlyStealthRelayer is IOnlyStealthRelayer {
  address public stealthRelayer;

  constructor(address _stealthRelayer) {
    _setStealthRelayer(_stealthRelayer);
  }

  modifier onlyStealthRelayer() {
    require(msg.sender == stealthRelayer, 'OnlyStealthRelayer::msg-sender-not-stealth-relayer');
    _;
  }

  function _setStealthRelayer(address _stealthRelayer) internal {
    stealthRelayer = _stealthRelayer;
    emit StealthRelayerSet(_stealthRelayer);
  }
}