"metadata": "{\"compiler\":{\"version\":\"0.8.18+commit.87f61d96\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_implementation\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"_data\",\"type\":\"bytes\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"stateMutability\":\"payable\",\"type\":\"fallback\"},{\"stateMutability\":\"payable\",\"type\":\"receive\"}],\"devdoc\":{\"author\":\"Simon Malatrait <
[email protected]>\",\"details\":\"This contract implements a UUPS Proxy compliant with ERC-1967 & ERC-1822.This contract delegates all calls to another contract (UUPS Proxiable) through a fallback function and the use of the `delegatecall` EVM instruction.We refer to the Proxiable contract (as per ERC-1822) with `implementation`.\",\"kind\":\"dev\",\"methods\":{\"constructor\":{\"details\":\"Initializes the upgradeable proxy with an initial implementation specified by `_implementation`. If `_data` is nonempty, it's used as data in a delegate call to `_implementation`. This will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity constructor.\"}},\"stateVariables\":{\"IMPLEMENTATION_SLOT\":{\"details\":\"Storage slot with the address of the current implementation. This is the keccak-256 hash of \\\"eip1967.proxy.implementation\\\" subtracted by 1, and is validated in the constructor. NOTE: bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)\"}},\"title\":\"UUPS Proxy\",\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"src/proxy/UUPSProxy.sol\":\"UUPSProxy\"},\"evmVersion\":\"paris\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":true,\"runs\":100},\"remappings\":[]},\"sources\":{\"src/proxy/UUPSProxy.sol\":{\"content\":\"//SPDX-License-Identifier: MIT\\n// Adapted from <https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.9.0/contracts/proxy/ERC1967/ERC1967Proxy.sol>\\n\\n/**\\n * @authors: [@malatrax]\\n * @reviewers: []\\n * @auditors: []\\n * @bounties: []\\n * @deployments: []\\n */\\npragma solidity 0.8.18;\\n\\n/**\\n * @title UUPS Proxy\\n * @author Simon Malatrait <
[email protected]>\\n * @dev This contract implements a UUPS Proxy compliant with ERC-1967 & ERC-1822.\\n * @dev This contract delegates all calls to another contract (UUPS Proxiable) through a fallback function and the use of the `delegatecall` EVM instruction.\\n * @dev We refer to the Proxiable contract (as per ERC-1822) with `implementation`.\\n */\\ncontract UUPSProxy {\\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 * NOTE: bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)\\n */\\n bytes32 private constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\\n\\n // ************************************* //\\n // * Constructor * //\\n // ************************************* //\\n\\n /**\\n * @dev Initializes the upgradeable proxy with an initial implementation specified by `_implementation`.\\n *\\n * If `_data` is nonempty, it's used as data in a delegate call to `_implementation`. This will typically be an encoded\\n * function call, and allows initializing the storage of the proxy like a Solidity constructor.\\n */\\n constructor(address _implementation, bytes memory _data) {\\n assembly {\\n sstore(IMPLEMENTATION_SLOT, _implementation)\\n }\\n\\n if (_data.length != 0) {\\n (bool success, ) = _implementation.delegatecall(_data);\\n require(success, \\\"Proxy Constructor failed\\\");\\n }\\n }\\n\\n // ************************************* //\\n // * State Modifiers * //\\n // ************************************* //\\n\\n /**\\n * @dev Delegates the current call to `implementation`.\\n *\\n * NOTE: This function does not return to its internal call site, it will return directly to the external caller.\\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(gas(), implementation, 0, calldatasize(), 0, 0)\\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 // * Internal Views * //\\n // ************************************* //\\n\\n function _getImplementation() internal view returns (address implementation) {\\n assembly {\\n implementation := sload(IMPLEMENTATION_SLOT)\\n }\\n }\\n\\n // ************************************* //\\n // * Fallback * //\\n // ************************************* //\\n\\n /**\\n * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other\\n * function in the contract matches the call data.\\n */\\n fallback() external payable {\\n _delegate(_getImplementation());\\n }\\n\\n receive() external payable {\\n _delegate(_getImplementation());\\n }\\n}\\n\",\"keccak256\":\"0xb42b4da7d7d4de880da62538361fe7ca2aca28577880e53bafa8d07eb9a08c48\",\"license\":\"MIT\"}},\"version\":1}",
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