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// SPDX-License-Identifier: GPL-3.0 | ||
// | ||
// :+#####%%%%%%%%%%%%%%+ | ||
// .-*@@@%+.:+%@@@@@%%#***%@@%= | ||
// :=*%@@@#=. :#@@% *@@@%= | ||
// .-+*%@%*-.:+%@@@@@@+. -*+: .=#. :%@@@%- | ||
// :=*@@@@%%@@@@@@@@@%@@@- .=#@@@%@%= =@@@@#. | ||
// -=+#%@@%#*=:. :%@@@@%. -*@@#*@@@@@@@#=:- *@@@@+ | ||
// =@@%=:. :=: *@@@@@%#- =%*%@@@@#+-. =+ :%@@@%- | ||
// -@@%. .+@@@ =+=-. @@#- +@@@%- =@@@@%: | ||
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/** | ||
* NOTICE | ||
* | ||
* The T-REX software is licensed under a proprietary license or the GPL v.3. | ||
* If you choose to receive it under the GPL v.3 license, the following applies: | ||
* T-REX is a suite of smart contracts implementing the ERC-3643 standard and | ||
* developed by Tokeny to manage and transfer financial assets on EVM blockchains | ||
* | ||
* Copyright (C) 2023, Tokeny sàrl. | ||
* | ||
* This program is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
*/ | ||
|
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pragma solidity 0.8.27; | ||
|
||
import "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol"; | ||
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contract OwnableOnceNext2StepUpgradeable is Ownable2StepUpgradeable { | ||
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struct Ownable2StepsStorage { | ||
bool firstCall; | ||
} | ||
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bytes32 private constant _STORAGE_SLOT = keccak256("ownableOnceNext2StepUpgradeable.storage.firstCall"); | ||
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function transferOwnership(address newOwner) public override onlyOwner { | ||
Ownable2StepsStorage storage s = _getStorage(); | ||
if (s.firstCall) { | ||
s.firstCall = false; | ||
super._transferOwnership(newOwner); | ||
} | ||
else { | ||
super.transferOwnership(newOwner); | ||
} | ||
} | ||
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function _getStorage() internal pure returns (Ownable2StepsStorage storage s) { | ||
bytes32 position = _STORAGE_SLOT; | ||
assembly { | ||
s.slot := position | ||
} | ||
} | ||
|
||
} |
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