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// SPDX-License-Identifier: GPL-2.0-or-later

pragma solidity ^0.8.0;

/// @title BeaconProxy
/// @custom:security-contact [email protected]
/// @author Euler Labs (https://www.eulerlabs.com/)
/// @notice A proxy contract, forwarding all calls to an implementation contract, fetched from a beacon
/// @dev The proxy attaches up to 128 bytes of metadata to the delegated call data.
contract BeaconProxy {
    // ERC-1967 beacon address slot. bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    // Beacon implementation() selector
    bytes32 internal constant IMPLEMENTATION_SELECTOR =
        0x5c60da1b00000000000000000000000000000000000000000000000000000000;
    // Max trailing data length, 4 immutable slots
    uint256 internal constant MAX_TRAILING_DATA_LENGTH = 128;

    address internal immutable beacon;
    uint256 internal immutable metadataLength;
    bytes32 internal immutable metadata0;
    bytes32 internal immutable metadata1;
    bytes32 internal immutable metadata2;
    bytes32 internal immutable metadata3;

    event Genesis();

    constructor(bytes memory trailingData) {
        emit Genesis();

        require(trailingData.length <= MAX_TRAILING_DATA_LENGTH, "trailing data too long");

        // Beacon is always the proxy creator; store it in immutable
        beacon = msg.sender;

        // Store the beacon address in ERC-1967 slot for compatibility with block explorers
        assembly {
            sstore(BEACON_SLOT, caller())
        }

        // Record length as immutable
        metadataLength = trailingData.length;

        // Pad length with uninitialized memory so the decode will succeed
        assembly {
            mstore(trailingData, MAX_TRAILING_DATA_LENGTH)
        }
        (metadata0, metadata1, metadata2, metadata3) = abi.decode(trailingData, (bytes32, bytes32, bytes32, bytes32));
    }

    fallback() external payable {
        address beacon_ = beacon;
        uint256 metadataLength_ = metadataLength;
        bytes32 metadata0_ = metadata0;
        bytes32 metadata1_ = metadata1;
        bytes32 metadata2_ = metadata2;
        bytes32 metadata3_ = metadata3;

        assembly {
            // Fetch implementation address from the beacon
            mstore(0, IMPLEMENTATION_SELECTOR)
            // Implementation call is trusted not to revert and to return an address
            let result := staticcall(gas(), beacon_, 0, 4, 0, 32)
            let implementation := mload(0)

            // delegatecall to the implementation with trailing metadata
            calldatacopy(0, 0, calldatasize())
            mstore(calldatasize(), metadata0_)
            mstore(add(32, calldatasize()), metadata1_)
            mstore(add(64, calldatasize()), metadata2_)
            mstore(add(96, calldatasize()), metadata3_)
            result := delegatecall(gas(), implementation, 0, add(metadataLength_, calldatasize()), 0, 0)
            returndatacopy(0, 0, returndatasize())

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

{
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    "lib/euler-earn:@openzeppelin-upgradeable/=lib/euler-earn/lib/openzeppelin-contracts-upgradeable/contracts/",
    "lib/euler-earn:ethereum-vault-connector/=lib/euler-earn/lib/ethereum-vault-connector/src/",
    "lib/layerzero-devtools/packages/oft-evm/contracts:@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts/contracts/",
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    "lib/fee-flow/src:solmate/=lib/fee-flow/lib/solmate/src/",
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  ],
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[{"internalType":"bytes","name":"trailingData","type":"bytes"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[],"name":"Genesis","type":"event"},{"stateMutability":"payable","type":"fallback"}]

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

0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000004000000000af88d065e77c8cc2239327c5edb3a432268e583194b6924796ccc98e5237615f8710ef5732190f660000000000000000000000000000000000000348

-----Decoded View---------------
Arg [0] : trailingData (bytes): 0x00000000af88d065e77c8cc2239327c5edb3a432268e583194b6924796ccc98e5237615f8710ef5732190f660000000000000000000000000000000000000348

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [2] : 00000000af88d065e77c8cc2239327c5edb3a432268e583194b6924796ccc98e
Arg [3] : 5237615f8710ef5732190f660000000000000000000000000000000000000348