Contract 0xeaeA85745698a3400E21951e8F86275231ad8F12 8

 
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0xd62dc1f1ededec099b03055e6e850fa603331a4b7f99f0775cff3821504bc430Nominate New Own...39453942023-09-14 8:28:55218 days 20 hrs ago0x30a9fb027d903b1e422cbebef0d6968d76751830 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000214522060.107510746
0x83c94d93f43dc47aad3e9f1c0cf6e9e5891ff0055eaa3e3e85323b6900df4d63Set Sport Positi...39081252023-09-13 11:46:37219 days 16 hrs ago0x30a9fb027d903b1e422cbebef0d6968d76751830 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000398481610.025388082
0xd4a128d04b74794c1e33eb8af25f1b74a63c487650e5708461f2f60a9741ec7aAccept Ownership38646692023-09-12 11:38:05220 days 17 hrs ago0x30a9fb027d903b1e422cbebef0d6968d76751830 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000195926840.01134151
0xbf7bb5aedaae562e495e70cbfa2386a6b39d9ccd76b767846bb58a9630528564Nominate New Own...38605082023-09-12 9:19:23220 days 19 hrs ago0x8559027bac39638438ddb32d713f0b12ef66ea7b IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000184216320.114
0x3f94be87a8875776a082f03a6f1190bba1863e71f1dddadc43103f7f10098ec8Accept Ownership36631422023-09-07 19:40:31225 days 8 hrs ago0x8559027bac39638438ddb32d713f0b12ef66ea7b IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000360667940.018
0x25fb57bb5e546ffd61b0571eff7d31a472968759e54b6d9da6f8067c18c20cd8Nominate New Own...35994732023-09-06 8:18:13226 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000179858790.019
0x0040bacc7ba0d1e2c8b0f3948dd25f0fdda45de320cbbce29165101169e0981dSet Sports AMM30812712023-08-25 8:24:49238 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000338610580.1
0x817ecb2b8c375af258ace224b668c730f13c3127d485a4d02bbee1a97496e342Set Sports AMM30812682023-08-25 8:24:43238 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000356905170.1
0x2a1417ad9471f037df6999a662d1580a747279f418a406c321a575254bf9f7d9Set Sport Positi...30812602023-08-25 8:24:27238 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000364357650.1
0x507bd0576611c6867da823aa33eec9bb1deacbcdcba6d55ec9c79b0a0cd0917fSet Sport Positi...30812492023-08-25 8:24:05238 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000330959850.1
0x7499e0b72ab0758de9efec42ee9793af9ff5d53ac2a81e86811aa27e45faea27Set Sport Positi...30812332023-08-25 8:23:33238 days 20 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000368398460.1
0xa2a1f5a7b7043abea913a520ff120dd4fdd11489d37fd672cae3d3eb347c9b0dSet Sport Positi...30437172023-08-24 11:33:01239 days 17 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  0xeaea85745698a3400e21951e8f86275231ad8f120 ETH0.0000830644431
0xb4d36259cb5bdca77ddd578470693b40e05d4547a38e7e0adc4d4585c1b223860x6080604030437052023-08-24 11:32:37239 days 17 hrs ago0x5aab1dae1ef9d93b7095d9de9c0ebb150d0c37f0 IN  Contract Creation0 ETH0.0014438593751
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0xfd7a00210c222a23acc191113050eded66c5a24810df78200254c6287e27f505133989902024-04-20 4:28:4711 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xa7135a30e137b4de47dc59d0d5b33c390517f0a931a05c0c4ca7769e291d67da133987662024-04-20 4:21:1918 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xa7135a30e137b4de47dc59d0d5b33c390517f0a931a05c0c4ca7769e291d67da133987662024-04-20 4:21:1918 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xbba44c6e7385f7e818c7cfbf2c11242bd7401a997e53a3228152db7166ff9920133965812024-04-20 3:08:291 hr 31 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xbba44c6e7385f7e818c7cfbf2c11242bd7401a997e53a3228152db7166ff9920133965812024-04-20 3:08:291 hr 31 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xcdea64ca4043a29b6c600c242a591261c746ae19c4ed883e8822f0c6c26bd8a3133965762024-04-20 3:08:191 hr 31 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x2707f2919a1002a05a03485deea50b8ad6a1b12d401c452cd30c18ab13c50e0d133956822024-04-20 2:38:312 hrs 1 min ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x16a2b593dcd7e89c51898f182c5269b2e17ae4d453fe814d127adf9cb486b1a3133946192024-04-20 2:03:052 hrs 37 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x82843e9653c30ef4a931b45ca112271f1ca0269786745b0b9ed22a16c112882b133944682024-04-20 1:58:032 hrs 42 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x82843e9653c30ef4a931b45ca112271f1ca0269786745b0b9ed22a16c112882b133944682024-04-20 1:58:032 hrs 42 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x2b00e554e2bed008b43fee2dbcc0371aa0383bd12d26c59ca004bad577884b47133944642024-04-20 1:57:552 hrs 42 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x2b00e554e2bed008b43fee2dbcc0371aa0383bd12d26c59ca004bad577884b47133944642024-04-20 1:57:552 hrs 42 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x2b00e554e2bed008b43fee2dbcc0371aa0383bd12d26c59ca004bad577884b47133944642024-04-20 1:57:552 hrs 42 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x46fbb59bdbcaf107f45e9f8811d3e51c24df50631dcadf421449fbb744bbb7b5133943862024-04-20 1:55:192 hrs 44 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x66ec95798e774ee3e068d414e7a8f170076ce91f984936697e096dd31a1c6665133943812024-04-20 1:55:092 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x66ec95798e774ee3e068d414e7a8f170076ce91f984936697e096dd31a1c6665133943812024-04-20 1:55:092 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x66ec95798e774ee3e068d414e7a8f170076ce91f984936697e096dd31a1c6665133943812024-04-20 1:55:092 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x66ec95798e774ee3e068d414e7a8f170076ce91f984936697e096dd31a1c6665133943812024-04-20 1:55:092 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x66ec95798e774ee3e068d414e7a8f170076ce91f984936697e096dd31a1c6665133943812024-04-20 1:55:092 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x9bd6448167eec5ddc8bab6bd547ce7c65ffed2dc2004841acd7e7b8421c6f256133943132024-04-20 1:52:532 hrs 47 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x9bd6448167eec5ddc8bab6bd547ce7c65ffed2dc2004841acd7e7b8421c6f256133943132024-04-20 1:52:532 hrs 47 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x0c7a54c8467aba938dba1dd538a9fd19e02e5d8f13cb6798f5f8be6023a803f4133929072024-04-20 1:06:013 hrs 34 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x3802021d5c477909054f09d002200fe317e3b31460393f26a020c9e61b994371133858792024-04-19 21:11:457 hrs 28 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0x8f40dc4e817174563a5283dd2750d6136b0ddfcf863df8d74be075d2ebb298a2133840952024-04-19 20:12:178 hrs 28 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
0xc1d632e7ae69e653ea8e2cf6e06bc109c38e6690785c6caebd4c2bc9523027d7133817622024-04-19 18:54:319 hrs 45 mins ago 0xeaea85745698a3400e21951e8f86275231ad8f12  Contract Creation0 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x8c14a40c488e16b055bc4e250563b5480047f01e
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at basescan.org on 2023-07-19
*/

/**
 *Submitted for verification at Optimistic.Etherscan.io on 2021-11-13
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

/**
 * @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) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        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);
            }
        }
    }
}

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @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 Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallSecure(address newImplementation, bytes memory data, bool forceCall) internal {
        address oldImplementation = _getImplementation();

        // Initial upgrade and setup call
        _setImplementation(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }

        // Perform rollback test if not already in progress
        StorageSlot.BooleanSlot storage rollbackTesting = StorageSlot.getBooleanSlot(_ROLLBACK_SLOT);
        if (!rollbackTesting.value) {
            // Trigger rollback using upgradeTo from the new implementation
            rollbackTesting.value = true;
            Address.functionDelegateCall(
                newImplementation,
                abi.encodeWithSignature(
                    "upgradeTo(address)",
                    oldImplementation
                )
            );
            rollbackTesting.value = false;
            // Check rollback was effective
            require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
            // Finally reset to the new implementation and log the upgrade
            _setImplementation(newImplementation);
            emit Upgraded(newImplementation);
        }
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }

    /**
     * @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;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(
            Address.isContract(newBeacon),
            "ERC1967: new beacon is not a contract"
        );
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
}

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        // solhint-disable-next-line no-inline-assembly
        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 This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _upgradeToAndCall(_logic, _data, false);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}

/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _changeAdmin(admin_);
    }

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _getAdmin();
    }

    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        _changeAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeToAndCall(newImplementation, data, true);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Swarm Source

ipfs://93f028255035b61df476b13b9dba3c4f06f60e51b9b4caee31680b389aef327f
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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