AdminUpgradeabilityProxy

< {{
  "language": "Solidity",
  "sources": {
    "contracts/AdminUpgradeabilityProxy.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.6.0;\n\nimport \"./UpgradeabilityProxy.sol\";\n\n/**\n * @title AdminUpgradeabilityProxy\n * @dev This contract combines an upgradeability proxy with an authorization\n * mechanism for administrative tasks.\n * All external functions in this contract must be guarded by the\n * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity\n * feature proposal that would enable this to be done automatically.\n */\ncontract AdminUpgradeabilityProxy is UpgradeabilityProxy {\n    /**\n     * Contract constructor.\n     * @param _logic address of the initial implementation.\n     * @param _admin Address of the proxy administrator.\n     * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.\n     * It should include the signature and the parameters of the function to be called, as described in\n     * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.\n     * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.\n     */\n    constructor(\n        address _logic,\n        address _admin,\n        bytes memory _data\n    ) public payable UpgradeabilityProxy(_logic, _data) {\n        assert(\n            ADMIN_SLOT == bytes32(uint256(keccak256(\"eip1967.proxy.admin\")) - 1)\n        );\n        _setAdmin(_admin);\n    }\n\n    /**\n     * @dev Emitted when the administration has been transferred.\n     * @param previousAdmin Address of the previous admin.\n     * @param newAdmin Address of the new admin.\n     */\n    event AdminChanged(address previousAdmin, address newAdmin);\n\n    /**\n     * @dev Storage slot with the admin of the contract.\n     * This is the keccak-256 hash of \"eip1967.proxy.admin\" subtracted by 1, and is\n     * validated in the constructor.\n     */\n\n    bytes32\n        internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;\n\n    /**\n     * @dev Modifier to check whether the `msg.sender` is the admin.\n     * If it is, it will run the function. Otherwise, it will delegate the call\n     * to the implementation.\n     */\n    modifier ifAdmin() {\n        if (msg.sender == _admin()) {\n            _;\n        } else {\n            _fallback();\n        }\n    }\n\n    /**\n     * @return The address of the proxy admin.\n     */\n    function admin() external ifAdmin returns (address) {\n        return _admin();\n    }\n\n    /**\n     * @return The address of the implementation.\n     */\n    function implementation() external ifAdmin returns (address) {\n        return _implementation();\n    }\n\n    /**\n     * @dev Changes the admin of the proxy.\n     * Only the current admin can call this function.\n     * @param newAdmin Address to transfer proxy administration to.\n     */\n    function changeAdmin(address newAdmin) external ifAdmin {\n        require(\n            newAdmin != address(0),\n            \"Cannot change the admin of a proxy to the zero address\"\n        );\n        emit AdminChanged(_admin(), newAdmin);\n        _setAdmin(newAdmin);\n    }\n\n    /**\n     * @dev Upgrade the backing implementation of the proxy.\n     * Only the admin can call this function.\n     * @param newImplementation Address of the new implementation.\n     */\n    function upgradeTo(address newImplementation) external ifAdmin {\n        _upgradeTo(newImplementation);\n    }\n\n    /**\n     * @dev Upgrade the backing implementation of the proxy and call a function\n     * on the new implementation.\n     * This is useful to initialize the proxied contract.\n     * @param newImplementation Address of the new implementation.\n     * @param data Data to send as msg.data in the low level call.\n     * It should include the signature and the parameters of the function to be called, as described in\n     * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.\n     */\n    function upgradeToAndCall(address newImplementation, bytes calldata data)\n        external\n        payable\n        ifAdmin\n    {\n        _upgradeTo(newImplementation);\n        (bool success, ) = newImplementation.delegatecall(data);\n        require(success);\n    }\n\n    /**\n     * @return adm The admin slot.\n     */\n    function _admin() internal view returns (address adm) {\n        bytes32 slot = ADMIN_SLOT;\n        assembly {\n            adm := sload(slot)\n        }\n    }\n\n    /**\n     * @dev Sets the address of the proxy admin.\n     * @param newAdmin Address of the new proxy admin.\n     */\n    function _setAdmin(address newAdmin) internal {\n        bytes32 slot = ADMIN_SLOT;\n\n        assembly {\n            sstore(slot, newAdmin)\n        }\n    }\n\n    /**\n     * @dev Only fall back when the sender is not the admin.\n     */\n    function _willFallback() internal virtual override {\n        require(\n            msg.sender != _admin(),\n            \"Cannot call fallback function from the proxy admin\"\n        );\n        super._willFallback();\n    }\n}\n"
    },
    "contracts/UpgradeabilityProxy.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.6.0;\n\nimport './Proxy.sol';\nimport '@openzeppelin/contracts/utils/Address.sol';\n\n/**\n * @title UpgradeabilityProxy\n * @dev This contract implements a proxy that allows to change the\n * implementation address to which it will delegate.\n * Such a change is called an implementation upgrade.\n */\ncontract UpgradeabilityProxy is Proxy {\n  /**\n   * @dev Contract constructor.\n   * @param _logic Address of the initial implementation.\n   * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.\n   * It should include the signature and the parameters of the function to be called, as described in\n   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.\n   * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.\n   */\n  constructor(address _logic, bytes memory _data) public payable {\n    assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));\n    _setImplementation(_logic);\n    if(_data.length > 0) {\n      (bool success,) = _logic.delegatecall(_data);\n      require(success);\n    }\n  }  \n\n  /**\n   * @dev Emitted when the implementation is upgraded.\n   * @param implementation Address of the new implementation.\n   */\n  event Upgraded(address indexed implementation);\n\n  /**\n   * @dev Storage slot with the address of the current implementation.\n   * This is the keccak-256 hash of \"eip1967.proxy.implementation\" subtracted by 1, and is\n   * validated in the constructor.\n   */\n  bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\n\n  /**\n   * @dev Returns the current implementation.\n   * @return impl Address of the current implementation\n   */\n  function _implementation() internal override view returns (address impl) {\n    bytes32 slot = IMPLEMENTATION_SLOT;\n    assembly {\n      impl := sload(slot)\n    }\n  }\n\n  /**\n   * @dev Upgrades the proxy to a new implementation.\n   * @param newImplementation Address of the new implementation.\n   */\n  function _upgradeTo(address newImplementation) internal {\n    _setImplementation(newImplementation);\n    emit Upgraded(newImplementation);\n  }\n\n  /**\n   * @dev Sets the implementation address of the proxy.\n   * @param newImplementation Address of the new implementation.\n   */\n  function _setImplementation(address newImplementation) internal {\n    require(Address.isContract(newImplementation), \"Cannot set a proxy implementation to a non-contract address\");\n\n    bytes32 slot = IMPLEMENTATION_SLOT;\n\n    assembly {\n      sstore(slot, newImplementation)\n    }\n  }\n}"
    },
    "contracts/Proxy.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.6.0;\n\n/**\n * @title Proxy\n * @dev Implements delegation of calls to other contracts, with proper\n * forwarding of return values and bubbling of failures.\n * It defines a fallback function that delegates all calls to the address\n * returned by the abstract _implementation() internal function.\n */\nabstract contract Proxy {\n    /**\n     * @dev Fallback function.\n     * Implemented entirely in `_fallback`.\n     */\n    fallback() external payable {\n        _fallback();\n    }\n\n    /**\n     * @dev Receive function.\n     * Implemented entirely in `_fallback`.\n     */\n    receive() external payable {\n        _fallback();\n    }\n\n    /**\n     * @return The Address of the implementation.\n     */\n    function _implementation() internal virtual view returns (address);\n\n    /**\n     * @dev Delegates execution to an implementation contract.\n     * This is a low level function that doesn't return to its internal call site.\n     * It will return to the external caller whatever the implementation returns.\n     * @param implementation Address to delegate.\n     */\n    function _delegate(address implementation) internal {\n        assembly {\n            // Copy msg.data. We take full control of memory in this inline assembly\n            // block because it will not return to Solidity code. We overwrite the\n            // Solidity scratch pad at memory position 0.\n            calldatacopy(0, 0, calldatasize())\n\n            // Call the implementation.\n            // out and outsize are 0 because we don't know the size yet.\n            let result := delegatecall(\n                gas(),\n                implementation,\n                0,\n                calldatasize(),\n                0,\n                0\n            )\n\n            // Copy the returned data.\n            returndatacopy(0, 0, returndatasize())\n\n            switch result\n                // delegatecall returns 0 on error.\n                case 0 {\n                    revert(0, returndatasize())\n                }\n                default {\n                    return(0, returndatasize())\n                }\n        }\n    }\n\n    /**\n     * @dev Function that is run as the first thing in the fallback function.\n     * Can be redefined in derived contracts to add functionality.\n     * Redefinitions must call super._willFallback().\n     */\n    function _willFallback() internal virtual {}\n\n    /**\n     * @dev fallback implementation.\n     * Extracted to enable manual triggering.\n     */\n    function _fallback() internal {\n        _willFallback();\n        _delegate(_implementation());\n    }\n}\n"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.6.2;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies in extcodesize, which returns 0 for contracts in\n        // construction, since the code is only stored at the end of the\n        // constructor execution.\n\n        uint256 size;\n        // solhint-disable-next-line no-inline-assembly\n        assembly { size := extcodesize(account) }\n        return size > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value\n        (bool success, ) = recipient.call{ value: amount }(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain`call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n      return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {\n        return _functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        return _functionCallWithValue(target, data, value, errorMessage);\n    }\n\n    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {\n        require(isContract(target), \"Address: call to non-contract\");\n\n        // solhint-disable-next-line avoid-low-level-calls\n        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                // solhint-disable-next-line no-inline-assembly\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "abi"
        ]
      }
    },
    "libraries": {}
  }
}} <