Contract 0x679C0174f6c288C4bcd5C95C9Ec99D50357C59E7 12

 
Txn Hash Method
Block
From
To
Value
0x0ea5e8997f05b43325eca3401b5d462663e05d12bffa12eaddbe60f021bb106bExecute Buyback1180040672024-03-28 6:21:515 hrs 4 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000122180320.028055285
0xa7184daa4074986f46717a143002fd42b0ab9db7076aed7b4658b57fc8846069Execute Buyback1179932312024-03-28 0:20:3911 hrs 5 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000159842680.03046365
0xae269629bf487678b87b884c80a8998d853086376c0a192e4695c36432c8f6baExecute Buyback1179932212024-03-28 0:20:1911 hrs 6 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000160867650.030546268
0xdb4b27e013a50507782bb91a5ca444b8a45fb08cebabf972403a666bc757b4f0Execute Buyback1179823842024-03-27 18:19:0517 hrs 7 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000438319350.029666127
0x6e2eb4861b896dd44203a6f7f900618df302ca6f8b927ed6178f3862c02bf6f5Execute Buyback1179715472024-03-27 12:17:5123 hrs 8 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000050483010.014093655
0xe18eb65b6e1fca7796bc7f1e924843dada3be00154233c6382abe2ea5b46feefExecute Buyback1179607102024-03-27 6:16:371 day 5 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000055154350.014263828
0xd4fa454469721317794d4c247df06775a6cce5e5f980818eb1d658d730c15b1bExecute Buyback1179498732024-03-27 0:15:231 day 11 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000055894730.014395131
0xf01f345c935cee02a344df1bfbdcfd85c4f4952d299052f2c4a52ab33e5420f4Execute Buyback1179390352024-03-26 18:14:071 day 17 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000050026780.013813638
0x5cedc06c3b4f63347f43d0ce9c09a52532cd891c7a530462d9649c44ad9a53b5Execute Buyback1179265222024-03-26 11:17:012 days 9 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000103464090.02908872
0x35005c3bfe3e263ac3be5ea8f13ea090674c01c728249de89a3769a4ee94f76cExecute Buyback1179150942024-03-26 4:56:052 days 6 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000116779540.03031285
0x84632902362508aff3103b9fe5378a6685c43272e6ebcd53520ba14f2116baffExecute Buyback1179042572024-03-25 22:54:512 days 12 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000102839510.028960856
0x3cf2e752f76dd9dfaf9966ecd7e5c820ca606c87ce9cd05e5094fd76d245b5ffExecute Buyback1178934202024-03-25 16:53:372 days 18 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.000011774280.030418496
0xc42f77665c395875035117bf9140b67dc73baf80c0afead01920d2d60f0cbab6Execute Buyback1178825832024-03-25 10:52:233 days 34 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000045144780.012672464
0xa0c731ce748c09fde4a5e8c9888a711dd7175c402d68244776b0f301e0173aeeExecute Buyback1178717472024-03-25 4:51:113 days 6 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000022108060.005689865
0x63c0f2ac256b7c1b4b2734886c4164c12ae096c6b1f894c830e0af765db4625dExecute Buyback1178609092024-03-24 22:49:553 days 12 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.000002165270.005537112
0xea29c8193f493de9408e9813ae5d1b2292b91b3824336a09a84c70db416086e5Execute Buyback1178500702024-03-24 16:48:373 days 18 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000023705910.006019568
0xea582766c797628a88869f95bb910ca1601ebf3d759fbcc0b1a6dfa84d0c07caExecute Buyback1178392332024-03-24 10:47:234 days 39 mins ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000024174830.006189152
0x1cee8f5c8f378d025f27a1e4fc358336024b124765163ccb1f03b6789679e5e0Execute Buyback1178274382024-03-24 4:14:134 days 7 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000019031030.005267356
0xe0073dd77c6eb7720e8ed609260c88c0381afdcb60e924474f687292f46048f5Execute Buyback1178166012024-03-23 22:12:594 days 13 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000024188820.00620185
0xd0b46ee1f89ee6693d1913f1669c6fca5cbdc088567efdf3a336d6b7311de48fExecute Buyback1178057642024-03-23 16:11:454 days 19 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000020385360.005613382
0x46bd171a0c5f8d05a25068ec4aa90f1a2136588dbe1cbb89ac24df7fbd215a16Execute Buyback1177949272024-03-23 10:10:315 days 1 hr ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000050719450.014216004
0xbb092634f3d4384e0f7b49dd166e2559ca7c01c425e6990f89ade19a11d9a6e3Execute Buyback1177840902024-03-23 4:09:175 days 7 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000021227270.005406992
0xd20a48b6cde79380b0e2a6ec6d5526dc78352605e9384c4bdcd2468e349cdc71Execute Buyback1177732532024-03-22 22:08:035 days 13 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000021753580.005523983
0x42fafbb5ce37bd8934f7440cb22858c8e208855b6baacd5f290d134b16d2601eExecute Buyback1177624162024-03-22 16:06:495 days 19 hrs ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000049873930.012787855
0x17f738ae866f6945689587b7991f7e9f8df2d8a0a00ef6b6549e8132310076daExecute Buyback1177515782024-03-22 10:05:336 days 1 hr ago0xff936b80783b32ad3f2b4e610d04c9778c4669a0 IN  0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70 ETH0.0000025361060.00700279
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Uniswap V3: Router0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 Uniswap V3: Factory0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70x2e80d5a7b3c613d854ee43243ff09808108561eb0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70x2e80d5a7b3c613d854ee43243ff09808108561eb0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 Uniswap V3: Factory0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Synthetix: sUSD Token0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Synthetix: sUSD Token0 ETH
0x4e2a9fb8f0da2062f3a5b78a2f8f496dd1bc9d1bc8803d56c8b5580d40e02f5e1075552632023-07-30 9:28:23242 days 1 hr ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0x84e964be3b910e8a8633856b69ebbddc7ba550060 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Uniswap V3: Router0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 Uniswap V3: Factory0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70x2e80d5a7b3c613d854ee43243ff09808108561eb0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70x2e80d5a7b3c613d854ee43243ff09808108561eb0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 Uniswap V3: Factory0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Synthetix: sUSD Token0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Synthetix: sUSD Token0 ETH
0xeade8615d94ce5ae21bcfd971897761a2fb75ffec359b1dd574189bb19980fb31075444282023-07-30 3:27:13242 days 7 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0x84e964be3b910e8a8633856b69ebbddc7ba550060 ETH
0xb71b968e725b67b5a17d53cab71f102789bc69a2e7a850ce0ba6799e5303a9361075335922023-07-29 21:26:01242 days 14 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7Uniswap V3: Router0 ETH
0xb71b968e725b67b5a17d53cab71f102789bc69a2e7a850ce0ba6799e5303a9361075335922023-07-29 21:26:01242 days 14 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0xb71b968e725b67b5a17d53cab71f102789bc69a2e7a850ce0ba6799e5303a9361075335922023-07-29 21:26:01242 days 14 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 0xff7fbdf7832ae524deda39ca402e03d92adff7a50 ETH
0xb71b968e725b67b5a17d53cab71f102789bc69a2e7a850ce0ba6799e5303a9361075335922023-07-29 21:26:01242 days 14 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e7 Uniswap V3: Factory0 ETH
0xb71b968e725b67b5a17d53cab71f102789bc69a2e7a850ce0ba6799e5303a9361075335922023-07-29 21:26:01242 days 14 hrs ago 0x679c0174f6c288c4bcd5c95c9ec99d50357c59e70x2e80d5a7b3c613d854ee43243ff09808108561eb0 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"}]

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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