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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/",
    "lib/layerzero-devtools/packages/oft-evm-upgradeable/contracts:@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "lib/layerzero-devtools/packages/oapp-evm-upgradeable/contracts:@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@layerzerolabs/oft-evm/=lib/layerzero-devtools/packages/oft-evm/",
    "@layerzerolabs/oapp-evm/=lib/layerzero-devtools/packages/oapp-evm/",
    "@layerzerolabs/oapp-evm-upgradeable/=lib/layerzero-devtools/packages/oapp-evm-upgradeable/",
    "@layerzerolabs/lz-evm-protocol-v2/=lib/layerzero-v2/packages/layerzero-v2/evm/protocol/",
    "@layerzerolabs/lz-evm-messagelib-v2/=lib/layerzero-v2/packages/layerzero-v2/evm/messagelib/",
    "@layerzerolabs/lz-evm-oapp-v2/=lib/layerzero-v2/packages/layerzero-v2/evm/oapp/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "ethereum-vault-connector/=lib/ethereum-vault-connector/src/",
    "evc/=lib/ethereum-vault-connector/src/",
    "evk/=lib/euler-vault-kit/src/",
    "evk-test/=lib/euler-vault-kit/test/",
    "euler-price-oracle/=lib/euler-price-oracle/src/",
    "euler-price-oracle-test/=lib/euler-price-oracle/test/",
    "fee-flow/=lib/fee-flow/src/",
    "reward-streams/=lib/reward-streams/src/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "euler-earn/=lib/euler-earn/src/",
    "layerzero/oft-evm/=lib/layerzero-devtools/packages/oft-evm/contracts/",
    "layerzero/oft-evm-upgradeable/=lib/layerzero-devtools/packages/oft-evm-upgradeable/contracts/",
    "solidity-bytes-utils/=lib/solidity-bytes-utils/",
    "@openzeppelin-upgradeable/=lib/euler-earn/lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@pendle/core-v2/=lib/euler-price-oracle/lib/pendle-core-v2-public/contracts/",
    "@pyth/=lib/euler-price-oracle/lib/pyth-sdk-solidity/",
    "@redstone/evm-connector/=lib/euler-price-oracle/lib/redstone-oracles-monorepo/packages/evm-connector/contracts/",
    "@solady/=lib/euler-price-oracle/lib/solady/src/",
    "@uniswap/v3-core/=lib/euler-price-oracle/lib/v3-core/",
    "@uniswap/v3-periphery/=lib/euler-price-oracle/lib/v3-periphery/",
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    "crytic-properties/=lib/euler-earn/lib/properties/contracts/",
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    "euler-vault-kit/=lib/euler-vault-kit/",
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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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

00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000040000000004200000000000000000000000000000000000006deb6135daed5470241843838944631af12ce464b0000000000000000000000000000000000000348

-----Decoded View---------------
Arg [0] : trailingData (bytes): 0x000000004200000000000000000000000000000000000006deb6135daed5470241843838944631af12ce464b0000000000000000000000000000000000000348

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [2] : 000000004200000000000000000000000000000000000006deb6135daed54702
Arg [3] : 41843838944631af12ce464b0000000000000000000000000000000000000348