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// SPDX-License-Identifier: MIT
pragma solidity 0.8.5;

/**
 * @title InitializedProxy
 * @author Anna Carroll
 */
contract InitializedProxy {
    // address of logic contract
    address public immutable logic;

    // ======== Constructor =========

    constructor(
        address _logic,
        bytes memory _initializationCalldata
    ) {
        logic = _logic;
        // Delegatecall into the logic contract, supplying initialization calldata
        (bool _ok, bytes memory returnData) =
            _logic.delegatecall(_initializationCalldata);
        // Revert if delegatecall to implementation reverts
        require(_ok, string(returnData));
    }

    // ======== Fallback =========

    fallback() external payable {
        address _impl = logic;
        assembly {
            let ptr := mload(0x40)
            calldatacopy(ptr, 0, calldatasize())
            let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
            let size := returndatasize()
            returndatacopy(ptr, 0, size)

            switch result
                case 0 {
                    revert(ptr, size)
                }
                default {
                    return(ptr, size)
                }
        }
    }

    // ======== Receive =========

    receive() external payable {} // solhint-disable-line no-empty-blocks
}

{
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"bytes","name":"_initializationCalldata","type":"bytes"}],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"logic","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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