Contract 0x3bD77B8FE52242797C29Df251418873Ae34F0641 8

 
Txn Hash Method
Block
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Value
0x3f4791c0d8b11cf3e2acb41bfda0bab7cac8be98e3da836192646dbe6f009ef0Exercise Parlays1102451842023-09-30 15:52:2559 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.000320101680.03294191
0xc727d1e5c20c48955b62bef62019bf2346b3cf6bace0ae496e78c2967ce97e2fExercise Parlays1102415712023-09-30 13:51:592 hrs 59 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000319564470.031118984
0xdcacad058557e000b0285af4af5d30883721f51f3fc7084f6dfe8bce14e0935bExercise Parlays1102415652023-09-30 13:51:473 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001967140080.032848886
0xdefa0b43849fdc737437a5bb14402ab106e8bfd3f651a45da77724583f41c33fExercise Parlays1102415602023-09-30 13:51:373 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001402439240.029426173
0x1c18822ff27fff8676640e4d46a060ea61d812cd4f5e61a60316bab9ecea0eddExercise Parlays1102285342023-09-30 6:37:2510 hrs 14 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001427377290.047227423
0xc32c44705c62f5fde58dff4a6b66c54d8d979bf4e8b3c55938be022e1c56407dExercise Parlays1102249212023-09-30 4:36:5912 hrs 14 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001318594320.021108674
0xeae5259a74aac364ccce478aeb10e3f1fdc5e128432c8fc94dc73dbc23e3efc1Exercise Parlays1102213082023-09-30 2:36:3314 hrs 15 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001451702940.032259364
0x4a6e946549a1066eee1b8cd7c00e482802157dae9ab05d8f2be8ce7625671ba9Exercise Parlays1102140952023-09-29 22:36:0718 hrs 15 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000900367670.032398326
0x15fddea7f0a3a5f63c74c86601d1f546b7146ecfdf5d360eb26c0f5b359b06e9Exercise Parlays1102104822023-09-29 20:35:4120 hrs 16 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0002585705140.034754942
0x4330c2cabbf3c2ff4953108486f270637a5af3ae816ed40253f92ec3f7da9abfExercise Parlays1102068702023-09-29 18:35:1722 hrs 16 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001714986680.032707068
0x62b684b8f7773251c1912c380f636382eb5fdaef547450faa6f2f7a1e3801226Exercise Parlays1102068632023-09-29 18:35:0322 hrs 16 mins ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0003504851850.032536842
0x33f4f9e0a169c859d021694d622539ca943910d50feb70cb749c6094e3ddb982Exercise Parlays1101960492023-09-29 12:34:351 day 4 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000819469830.049019474
0x5d2cda1660dae2d117289575bfa59335264ae54b9c4dc3badcb9d1369cf9c8e2Exercise Parlays1101960422023-09-29 12:34:211 day 4 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001932301560.049621483
0xa8ad051fe6919bdf6a8250feeab84e558fd0731162a9afa0f3c8a440f332ab18Exercise Parlays1101945252023-09-29 11:43:471 day 5 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000270800730.039704196
0xa15bd0c2696fe1e2a5b6fcbd3ae78da02232fe256f0daf834a81710e0c1961beExercise Parlays1101945192023-09-29 11:43:351 day 5 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001113150730.038965404
0xf7d2ac8d0c8313cc3b7d77458246c2945b82eeda01ea2f8677aa379ee7060ffbExercise Parlays1101891312023-09-29 8:43:591 day 8 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000298747720.040009436
0x51cf5e3d13ce5b01dd77e2b5fffdaa9bc2102cabeba130e31343d56e1669fd7dExercise Parlays1101891252023-09-29 8:43:471 day 8 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001223898360.038885414
0x00c870db8565aca8def4c7360b7e985dab33c18cc1c1795ce5569eeac00fa415Exercise Parlays1101864202023-09-29 7:13:371 day 9 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001175096430.039554354
0x5d7afe90dee68e7701699286d384f0288dc6c7bfb661b668989708299edf3d48Exercise Parlays1101864142023-09-29 7:13:251 day 9 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001277282260.037145662
0xaf9205ecd9f45cdfbcba234191dde958ce2d7d00228bd0b2e5e2e8daff1936c5Exercise Parlays1101847922023-09-29 6:19:211 day 10 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000377173690.050284171
0x070c2e8f217a61a0640b6ef29531824349c692ba115bad369c48b8e4142a69deExercise Parlays1101811792023-09-29 4:18:551 day 12 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0002688909790.060530433
0xd06cd490054fe3e5a8bcddcc2d03b090a0199967c113d38df4712aef1809adbaExercise Parlays1101775662023-09-29 2:18:291 day 14 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001260662780.061550539
0x57cd59b8762194d6b1c130c6a80d2c39aa95514364cb741665abcbd1d7a0c809Exercise Parlays1101739522023-09-29 0:18:011 day 16 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0000307381780.033180329
0x28ff69fa7320f005fba43d1cd20ecf62149a5b687745bafeade171cf7f4c7a4bExercise Parlays1101703402023-09-28 22:17:371 day 18 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0001202048050.032255847
0xea6e96a1bddca5fe16db37edec7a44ff0eeb3654247445f833828ba750001961Exercise Parlays1101703312023-09-28 22:17:191 day 18 hrs ago0x8301fc830334c24674a260cc899f9f499512e5cf IN  0x3bd77b8fe52242797c29df251418873ae34f06410 ETH0.0002827597460.032739918
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Latest 25 internal transaction
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0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641Synthetix: sUSD Token0 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641Synthetix: sUSD Token0 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0xdfe5c62bcd799009a5e56f9a982cd3c88389103a53e479fbdd9763b4e157068c1075552242023-07-30 9:27:0562 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x09b7b9e47e8fd3329c43154c4acf66180ce64a950 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641Synthetix: sUSD Token0 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
0x7766556e9573f6b9c63d67846eb4bdf75738f1cdb0b7dcee4cfe195e246eba2c1075552172023-07-30 9:26:5162 days 7 hrs ago 0x3bd77b8fe52242797c29df251418873ae34f0641 0x82b3634c0518507d5d817be6dab6233ebe4d68d90 ETH
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Similar Match Source Code
This contract matches the deployed ByteCode of the Source Code for Contract 0xf18D727C034f47AE2C0FE221C1cf4A15f0557b5F
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 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

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"admin_","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"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":"beacon","type":"address"}],"name":"BeaconUpgraded","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":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Deployed ByteCode Sourcemap

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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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