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"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.7;\n\nimport { PayableProxyInterface } from \"../interfaces/PayableProxyInterface.sol\";\n\ninterface IUpgradeBeacon {\n /**\n * @notice An external view function that returns the implementation.\n *\n * @return The address of the implementation.\n */\n function implementation() external view returns (address);\n}\n\n/**\n * @title PayableProxy\n * @author OpenSea Protocol Team\n * @notice PayableProxy is a beacon proxy which will immediately return if\n * called with callvalue. Otherwise, it will delegatecall the beacon\n * implementation.\n */\ncontract PayableProxy is PayableProxyInterface {\n // Address of the beacon.\n address private immutable _beacon;\n\n constructor(address beacon) payable {\n // Ensure the origin is an approved deployer.\n require(\n (tx.origin == address(0x939C8d89EBC11fA45e576215E2353673AD0bA18A) ||\n tx.origin ==\n address(0xe80a65eB7a3018DedA407e621Ef5fb5B416678CA) ||\n tx.origin ==\n address(0x86D26897267711ea4b173C8C124a0A73612001da) ||\n tx.origin ==\n address(0x3B52ad533687Ce908bA0485ac177C5fb42972962)),\n \"Deployment must originate from an approved deployer.\"\n );\n // Set the initial beacon.\n _beacon = beacon;\n }\n\n function initialize(address ownerToSet) external {\n // Ensure the origin is an approved deployer.\n require(\n (tx.origin == address(0x939C8d89EBC11fA45e576215E2353673AD0bA18A) ||\n tx.origin ==\n address(0xe80a65eB7a3018DedA407e621Ef5fb5B416678CA) ||\n tx.origin ==\n address(0x86D26897267711ea4b173C8C124a0A73612001da) ||\n tx.origin ==\n address(0x3B52ad533687Ce908bA0485ac177C5fb42972962)),\n \"Initialize must originate from an approved deployer.\"\n );\n // Get the implementation address from the provided beacon.\n address implementation = IUpgradeBeacon(_beacon).implementation();\n\n // Create the initializationCalldata from the provided parameters.\n bytes memory initializationCalldata = abi.encodeWithSignature(\n \"initialize(address)\",\n ownerToSet\n );\n\n // Delegatecall into the implementation, supplying initialization\n // calldata.\n (bool ok, ) = implementation.delegatecall(initializationCalldata);\n\n // Revert and include revert data if delegatecall to implementation\n // reverts.\n if (!ok) {\n assembly {\n returndatacopy(0, 0, returndatasize())\n revert(0, returndatasize())\n }\n }\n }\n\n /**\n * @dev Fallback function that delegates calls to the address returned by\n * `_implementation()`. Will run if no other function in the contract\n * matches the call data.\n */\n fallback() external payable override {\n _fallback();\n }\n\n /**\n * @dev Internal fallback function that delegates calls to the address\n * returned by `_implementation()`. Will run if no other function\n * in the contract matches the call data.\n */\n function _fallback() internal {\n // Delegate if call value is zero.\n if (msg.value == 0) {\n _delegate(_implementation());\n }\n }\n\n /**\n * @dev Delegates the current call to `implementation`.\n *\n * This function does not return to its internal call site, it will\n * return directly to the external caller.\n */\n function _delegate(address implementation) internal virtual {\n assembly {\n // Copy msg.data. We take full control of memory in this\n // inline assembly block because it will not return to\n // Solidity code. We overwrite the Solidity scratch pad\n // 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 This function returns the address to which the fallback function\n * should delegate.\n */\n function _implementation() internal view returns (address) {\n return IUpgradeBeacon(_beacon).implementation();\n }\n}\n"
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