Token

Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Is this a proxy?
• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT

pragma solidity ^0.5.16;

contract ArcProxy {

    /**
    * @dev Emitted when the implementation is upgraded.
    * @param implementation Address of the new implementation.
    */
    event Upgraded(address indexed implementation);

    /**
    * @dev Emitted when the administration has been transferred.
    * @param previousAdmin Address of the previous admin.
    * @param newAdmin Address of the new admin.
    */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
    * @dev Storage slot with the admin of the contract.
    * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
    * validated in the constructor.
    */

    /* solium-disable-next-line */
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
    * @dev 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.
    */

    /* solium-disable-next-line */
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
    * @dev Modifier to check whether the `msg.sender` is the admin.
    * If it is, it will run the function. Otherwise, it will delegate the call
    * to the implementation.
    */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
    * Contract constructor.
    * @param _logic address of the initial implementation.
    * @param _admin Address of the proxy administrator.
    * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
    * It should include the signature and the parameters of the function to be called, as described in
    * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
    * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
    */
    constructor(
        address _logic,
        address _admin,
        bytes memory _data
    )
        public
        payable
    {
        assert(
            IMPLEMENTATION_SLOT == bytes32(
                uint256(keccak256("eip1967.proxy.implementation")) - 1
            )
        );

        _setImplementation(_logic);

        if (_data.length > 0) {
            /* solium-disable-next-line */
            (bool success,) = _logic.delegatecall(_data);
            /* solium-disable-next-line */
            require(success);
        }

        assert(
            ADMIN_SLOT == bytes32(
                uint256(keccak256("eip1967.proxy.admin")) - 1
            )
        );

        _setAdmin(_admin);
    }

    /**
     * @dev Fallback function.
     * Implemented entirely in `_fallback`.
     */
    function () external payable {
        _fallback();
    }

    /**
     * @dev fallback implementation.
     * Extracted to enable manual triggering.
     */
    function _fallback() internal {
        _delegate(_implementation());
    }

    /**
     * @dev Delegates execution to an implementation contract.
     * This is a low level function that doesn't return to its internal call site.
     * It will return to the external caller whatever the implementation returns.
     * @param implementation Address to delegate.
     */
    function _delegate(address implementation) internal {
        /* solium-disable-next-line */
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize)

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas, implementation, 0, calldatasize, 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize)

            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize) }
            default { return(0, returndatasize) }
        }
    }

    /**
     * Returns whether the target address is a contract
     * @dev This function will return false if invoked during the constructor of a contract,
     * as the code is not actually created until after the constructor finishes.
     * @param account address of the account to check
     * @return whether the target address is a contract
     */
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        // XXX Currently there is no better way to check if there is a contract in an address
        // than to check the size of the code at that address.
        // See https://ethereum.stackexchange.com/a/14016/36603
        // for more details about how this works.
        // TODO Check this again before the Serenity release, because all addresses will be
        // contracts then.
        /* solium-disable-next-line */
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
    * @dev Returns the current implementation.
    * @return Address of the current implementation
    */
    function _implementation() internal view returns (address impl) {
        bytes32 slot = IMPLEMENTATION_SLOT;
        /* solium-disable-next-line */
        assembly {
            impl := sload(slot)
        }
    }

    /**
    * @dev Upgrades the proxy to a new implementation.
    * @param newImplementation Address of the new implementation.
    */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
    * @dev Sets the implementation address of the proxy.
    * @param newImplementation Address of the new implementation.
    */
    function _setImplementation(address newImplementation) internal {
        require(
            isContract(newImplementation),
            "Cannot set a proxy implementation to a non-contract address"
        );

        bytes32 slot = IMPLEMENTATION_SLOT;

        /* solium-disable-next-line */
        assembly {
            sstore(slot, newImplementation)
        }
    }

    /**
    * @return The address of the proxy admin.
    */
    function admin() external ifAdmin returns (address) {
        return _admin();
    }

    /**
    * @return The address of the implementation.
    */
    function implementation() external ifAdmin returns (address) {
        return _implementation();
    }

    /**
    * @dev Changes the admin of the proxy.
    * Only the current admin can call this function.
    * @param newAdmin Address to transfer proxy administration to.
    */
    function changeAdmin(address newAdmin) external ifAdmin {
        require(
            newAdmin != address(0),
            "Cannot change the admin of a proxy to the zero address"
        );

        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
    * @dev Upgrade the backing implementation of the proxy.
    * Only the admin can call this function.
    * @param newImplementation Address of the new implementation.
    */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
    * @dev Upgrade the backing implementation of the proxy and call a function
    * on the new implementation.
    * This is useful to initialize the proxied contract.
    * @param newImplementation Address of the new implementation.
    * @param data Data to send as msg.data in the low level call.
    * It should include the signature and the parameters of the function to be called, as described in
    * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
    */
    function upgradeToAndCall(
        address newImplementation,
        bytes calldata data
    )
        external
        payable
        ifAdmin
    {
        _upgradeTo(newImplementation);
        /* solium-disable-next-line */
        (bool success,) = newImplementation.delegatecall(data);
        /* solium-disable-next-line */
        require(success);
    }

    /**
    * @return The admin slot.
    */
    function _admin() internal view returns (address adm) {
        bytes32 slot = ADMIN_SLOT;

        /* solium-disable-next-line */
        assembly {
            adm := sload(slot)
        }
    }

    /**
    * @dev Sets the address of the proxy admin.
    * @param newAdmin Address of the new proxy admin.
    */
    function _setAdmin(address newAdmin) internal {
        bytes32 slot = ADMIN_SLOT;

        /* solium-disable-next-line */
        assembly {
            sstore(slot, newAdmin)
        }
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"_admin","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"payable":true,"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":false,"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"payable":true,"stateMutability":"payable","type":"function"}]

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

0x60806040526004361061004a5760003560e01c80633659cfe6146100545780634f1ef286146100875780635c60da1b146101075780638f28397014610138578063f851a4401461016b575b610052610180565b005b34801561006057600080fd5b506100526004803603602081101561007757600080fd5b50356001600160a01b0316610192565b6100526004803603604081101561009d57600080fd5b6001600160a01b0382351691908101906040810160208201356401000000008111156100c857600080fd5b8201836020820111156100da57600080fd5b803590602001918460018302840111640100000000831117156100fc57600080fd5b5090925090506101cc565b34801561011357600080fd5b5061011c610279565b604080516001600160a01b039092168252519081900360200190f35b34801561014457600080fd5b506100526004803603602081101561015b57600080fd5b50356001600160a01b03166102b6565b34801561017757600080fd5b5061011c610370565b61019061018b61039b565b6103c0565b565b61019a6103e4565b6001600160a01b0316336001600160a01b031614156101c1576101bc81610409565b6101c9565b6101c9610180565b50565b6101d46103e4565b6001600160a01b0316336001600160a01b0316141561026c576101f683610409565b6000836001600160a01b031683836040518083838082843760405192019450600093509091505080830381855af49150503d8060008114610253576040519150601f19603f3d011682016040523d82523d6000602084013e610258565b606091505b505090508061026657600080fd5b50610274565b610274610180565b505050565b60006102836103e4565b6001600160a01b0316336001600160a01b031614156102ab576102a461039b565b90506102b3565b6102b3610180565b90565b6102be6103e4565b6001600160a01b0316336001600160a01b031614156101c1576001600160a01b03811661031c5760405162461bcd60e51b81526004018080602001828103825260368152602001806104dc6036913960400191505060405180910390fd5b7f7e644d79422f17c01e4894b5f4f588d331ebfa28653d42ae832dc59e38c9798f6103456103e4565b604080516001600160a01b03928316815291841660208301528051918290030190a16101bc81610449565b600061037a6103e4565b6001600160a01b0316336001600160a01b031614156102ab576102a46103e4565b7f360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc5490565b3660008037600080366000845af43d6000803e8080156103df573d6000f35b3d6000fd5b7fb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d61035490565b6104128161046d565b6040516001600160a01b038216907fbc7cd75a20ee27fd9adebab32041f755214dbc6bffa90cc0225b39da2e5c2d3b90600090a250565b7fb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d610355565b610476816104d5565b6104b15760405162461bcd60e51b815260040180806020018281038252603b815260200180610512603b913960400191505060405180910390fd5b7f360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc55565b3b15159056fe43616e6e6f74206368616e6765207468652061646d696e206f6620612070726f787920746f20746865207a65726f206164647265737343616e6e6f742073657420612070726f787920696d706c656d656e746174696f6e20746f2061206e6f6e2d636f6e74726163742061646472657373a265627a7a72315820adaa171b0dadd83f811d79d98a406b53316f23f1a2f295fa933b7d36108ebfcf64736f6c63430005100032

00000000000000000000000027b76e100b63731a7cf9386c1decb918e6f547560000000000000000000000009c767178528c8a205df63305ebda4bb6b147889b00000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _logic (address): 0x27b76E100b63731a7cF9386c1decb918E6F54756
Arg [1] : _admin (address): 0x9c767178528c8a205DF63305ebdA4BB6B147889b
Arg [2] : _data (bytes): 0x

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 00000000000000000000000027b76e100b63731a7cf9386c1decb918e6f54756
Arg [1] : 0000000000000000000000009c767178528c8a205df63305ebda4bb6b147889b
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000