1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
pragma solidity 0.4.25;
contract Auth {
  address internal mainAdmin;
  address internal backupAdmin;
  event OwnershipTransferred(address indexed _previousOwner, address indexed _newOwner);
  constructor(
    address _mainAdmin,
    address _backupAdmin
  ) internal {
    mainAdmin = _mainAdmin;
    backupAdmin = _backupAdmin;
  }
  modifier onlyMainAdmin() {
    require(isMainAdmin(), "onlyMainAdmin");
    _;
  }
  modifier onlyBackupAdmin() {
    require(isBackupAdmin(), "onlyBackupAdmin");
    _;
  }
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX