Contract

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

• library Address
•    - function isContract(address account)
•    - function sendValue(address payable re ...
•    - function functionCall(address target, ...
•    - function functionCall(address target, ...
•    - function functionCallWithValue(addres ...
•    - function functionCallWithValue(addres ...
•    - function _functionCallWithValue(addre ...
•    - function _implementation()
•    - function _delegate(address implementa ...
•    - function _willFallback()
•    - function _fallback()
•  contract BaseUpgradeabilityProxy i ...
•    - function _implementation()
•    - function _setImplementation(address n ...
•  contract AdminUpgradeabilityProxy ... *
•    - function admin()
•    - function implementation()
•    - function changeAdmin(address newAdmin ...
•    - function changeImplementation(address ...
•    - function _admin()
•    - function _setAdmin(address newAdmin)

More Options

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

/**
 *Submitted for verification at Etherscan.io on 2020-10-04
*/

// SPDX-License-Identifier: MIT
pragma solidity 0.6.8;


// 
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// 
/**
 * @title Proxy
 * @dev Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 *
 * Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/Proxy.sol
 */
abstract contract Proxy {

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

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

  /**
   * @return The Address of the implementation.
   */
  function _implementation() internal virtual view returns (address);

  /**
   * @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 {
    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()) }
    }
  }

  /**
   * @dev Function that is run as the first thing in the fallback function.
   * Can be redefined in derived contracts to add functionality.
   * Redefinitions must call super._willFallback().
   */
  function _willFallback() internal virtual {
  }

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

// 
/**
 * @title BaseUpgradeabilityProxy
 * @dev This contract implements a proxy that allows to change the
 * implementation address to which it will delegate.
 * Such a change is called an implementation upgrade.
 *
 * Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/BaseUpgradeabilityProxy.sol
 */
contract BaseUpgradeabilityProxy is Proxy {
    /**
   * @dev Emitted when the implementation is upgraded.
   * @param implementation Address of the new implementation.
   */
    event Upgraded(address indexed implementation);

    /**
   * @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.
   */
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

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

    /**
   * @dev Sets the implementation address of the proxy.
   * @param newImplementation Address of the new implementation.
   */
    function _setImplementation(address newImplementation) internal {
        require(
            Address.isContract(newImplementation),
            "Implementation not set"
        );

        bytes32 slot = IMPLEMENTATION_SLOT;

        assembly {
            sstore(slot, newImplementation)
        }
        emit Upgraded(newImplementation);
    }
}

// 
/**
 * @title AdminUpgradeabilityProxy
 * @dev This contract combines an upgradeability proxy with an authorization
 * mechanism for administrative tasks.
 * All external functions in this contract must be guarded by the
 * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
 * feature proposal that would enable this to be done automatically.
 * Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/BaseAdminUpgradeabilityProxy.sol
 */
contract AdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
  /**
   * @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.
   */

  bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

  /**
   * Contract constructor.
   * @param _logic address of the initial implementation.
   * @param _admin Address of the proxy administrator.
   * 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) public payable {
    assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
    assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
    _setImplementation(_logic);
    _setAdmin(_admin);
  }

  /**
   * @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();
    }
  }

  /**
   * @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 {
    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 changeImplementation(address newImplementation) external ifAdmin {
    _setImplementation(newImplementation);
  }

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

    assembly {
      sstore(slot, newAdmin)
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"_admin","type":"address"}],"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"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"changeImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

10913:3114:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;6805:11;:9;:11::i;:::-;10913:3114;;6951:11;:9;:11::i;13444:124::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;13444:124:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;13444:124:0;-1:-1:-1;;;;;13444:124:0;;:::i;12840:98::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;12840:98:0;;;:::i;:::-;;;;-1:-1:-1;;;;;12840:98:0;;;;;;;;;;;;;;13121:132;;5:9:-1;2:2;;;27:1;24;17:12;2:2;13121:132:0;;;;;;15:2:-1;10:3;7:11;4:2;;;31:1;28;21:12;4:2;-1:-1;13121:132:0;-1:-1:-1;;;;;13121:132:0;;:::i;12691:80::-;;5:9:-1;2:2;;;27:1;24;17:12;2:2;12691:80:0;;;:::i;8525:93::-;8562:15;:13;:15::i;:::-;8584:28;8594:17;:15;:17::i;:::-;8584:9;:28::i;:::-;8525:93::o;13444:124::-;12558:8;:6;:8::i;:::-;-1:-1:-1;;;;;12544:22:0;:10;-1:-1:-1;;;;;12544:22:0;;12540:80;;;13525:37:::1;13544:17;13525:18;:37::i;:::-;12540:80:::0;;;12601:11;:9;:11::i;:::-;13444:124;:::o;12840:98::-;12892:7;12558:8;:6;:8::i;:::-;-1:-1:-1;;;;;12544:22:0;:10;-1:-1:-1;;;;;12544:22:0;;12540:80;;;12915:17:::1;:15;:17::i;:::-;12908:24;;12540:80:::0;;;12601:11;:9;:11::i;:::-;12840:98;:::o;13121:132::-;12558:8;:6;:8::i;:::-;-1:-1:-1;;;;;12544:22:0;:10;-1:-1:-1;;;;;12544:22:0;;12540:80;;;13189:32:::1;13202:8;:6;:8::i;:::-;13189:32;::::0;;-1:-1:-1;;;;;13189:32:0;;::::1;::::0;;;;::::1;;::::0;::::1;::::0;;;;;;;;;::::1;13228:19;13238:8;13228:9;:19::i;12691:80::-:0;12734:7;12558:8;:6;:8::i;:::-;-1:-1:-1;;;;;12544:22:0;:10;-1:-1:-1;;;;;12544:22:0;;12540:80;;;12757:8:::1;:6;:8::i;747:619::-:0;807:4;1275:20;;1118:66;1315:23;;;;;;:42;;-1:-1:-1;1342:15:0;;;1315:42;1307:51;747:619;-1:-1:-1;;;;747:619:0:o;9693:190::-;9498:66;9854:11;;9831:45::o;7398:762::-;7705:14;7702:1;7699;7686:34;7905:1;7902;7886:14;7883:1;7867:14;7860:5;7847:60;7972:16;7969:1;7966;7951:38;8006:6;8063:38;;;;8129:16;8126:1;8119:27;8063:38;8082:16;8079:1;8072:27;13622:141;11460:66;13740:11;;13724:34::o;10030:360::-;10127:37;10146:17;10127:18;:37::i;:::-;10105:109;;;;;-1:-1:-1;;;10105:109:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;9498:66;10298:31;;;10355:27;;-1:-1:-1;;;;;10355:27:0;;;;;10227:12;;10355:27;10030:360;;:::o;13885:139::-;11460:66;13990:22;13981:38::o

ipfs://b05794efb34ed3573a1cd849d7708118c953609dfa210dac3dcfeef5e82fd4e6