erc-3643/contracts/proxy/ClaimTopicsRegistryProxy.sol

// 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/>.
 */

pragma solidity ^0.8.17;

import "./AbstractProxy.sol";

contract ClaimTopicsRegistryProxy is AbstractProxy {

    constructor(address implementationAuthority) {
        require(implementationAuthority != address(0), "invalid argument - zero address");
        _storeImplementationAuthority(implementationAuthority);
        emit ImplementationAuthoritySet(implementationAuthority);

        address logic = (ITREXImplementationAuthority(getImplementationAuthority())).getCTRImplementation();

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = logic.delegatecall(abi.encodeWithSignature("init()"));
        require(success, "Initialization failed.");
    }

    // solhint-disable-next-line no-complex-fallback
    fallback() external payable {
        address logic = (ITREXImplementationAuthority(getImplementationAuthority())).getCTRImplementation();

        // solhint-disable-next-line no-inline-assembly
        assembly {
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(sub(gas(), 10000), logic, 0x0, calldatasize(), 0, 0)
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)
            switch success
            case 0 {
                revert(0, retSz)
            }
            default {
                return(0, retSz)
            }
        }
    }
}