Contract 0xb7c4250f83289ff3ea9f21f01aad0b02fb19491a 13

 
Txn Hash Method
Block
From
To
Value
0xd86423a2b770346c756169eefb9410c550a3ffab8dec9e6a254ae15a2ad32cb4Withdraw1180377782024-03-29 1:05:338 hrs 38 mins ago0x402904e954aebee2e78b7b09595393cf05571333 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000049228040.0314316
0xfd1c82e573ad136cda0f01fa8835ea0c4f6fa1281a52c7a0b17b3bfb76938514Deposit1180375372024-03-29 0:57:318 hrs 46 mins ago0x402904e954aebee2e78b7b09595393cf05571333 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000059230730.02854
0xdac8a1b569d7933c05ec439e8ddc9c5f9e43a12a6172d8d9feb5957e4abb852bClaim1180367192024-03-29 0:30:159 hrs 13 mins ago0x402904e954aebee2e78b7b09595393cf05571333 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000052869750.0315164
0xdf283f1c947b1138d4c75642508b911794685f7d04dfa5f8d1758798f3067a6aWithdraw1180367042024-03-29 0:29:459 hrs 14 mins ago0x402904e954aebee2e78b7b09595393cf05571333 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000043861640.0310325
0xf12a8f1ce10b29f94243da3af84f2978c35f355350b3d8a89a23f376abaaff4dDeposit1180066782024-03-28 7:48:531 day 1 hr ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000070665930.028469105
0xb9a7edb898facf0da7087d0c44ba30756f2b3b663098fba52eb8c65e464289ecDeposit1180030082024-03-28 5:46:331 day 3 hrs ago0x38abab9766e0b27d2912718a884292b8e7eb2803 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000046536760.028760457
0x1f6c8637e324f0747737692298ab8145000e8aa922c01433c5364265c19b6cf3Deposit1179961682024-03-28 1:58:331 day 7 hrs ago0x45adff324eb1ac03a6a115dc539052232d4ba980 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000087999950.028462692
0x4cbea4ffb4693a68578fec8b600712438e84d2ef0db67399d9bc4ebc76a89e4dDeposit1179565942024-03-27 3:59:252 days 5 hrs ago0x38abab9766e0b27d2912718a884292b8e7eb2803 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000015804580.014234129
0xa287f7dade14edc31b2692455b51e2a803013b1d500099107562e0d5fbf5c688Deposit1179342722024-03-26 15:35:212 days 18 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000029593250.030243104
0xf1afc3c7cb9ab1747b32bca91eb4c6d93da9c37b88feff8f03dcb3ec4ae2c7bdDeposit1179340192024-03-26 15:26:552 days 18 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000029800750.030373368
0x7d920f0d5fb41fd36edea31c56c9a42b843471610c5a688796f7f9c0d8a3e73dDeposit1179278012024-03-26 11:59:392 days 21 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000031364570.02883811
0x19d77384a586e618eed9477b92fa34640d50db9c5fccce03259dc5b3820b6bc5Deposit1179022272024-03-25 21:47:113 days 11 hrs ago0xd7ac4581ef4e2bb6cc3734da183b981bfd0ee2a2 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000054185550.02850452
0x55c53d8c7f5a2d129bb3dac71e641e3b38aa820d7a329216fb73ff1b49411fdcWithdraw1177797112024-03-23 1:43:196 days 8 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000006364940.005596811
0xe240ae39fac87a60ebcff7160b23b7b03a3318565205813c4ee40d7a12fd4066Withdraw1177303192024-03-21 22:16:557 days 11 hrs ago0xef80c44d996ebac95aa62589986fb3fcdfe3f7d9 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000007868250.0068938
0x5167165110e9de4470eaad40fca134e77e98e72bee0f0c42c4c97ff003bf9c28Deposit1176599312024-03-20 7:10:399 days 2 hrs ago0x402904e954aebee2e78b7b09595393cf05571333 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000010285280.0087365
0x4a561aec581dafa87455c715df2b17c9e099fcd0c5b44c1800d8e8b252dc5f10Deposit1176413612024-03-19 20:51:399 days 12 hrs ago0x7aa0daf1be6970b5c32ee9d5a07a60c207d457fb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000010463910.007736254
0x89aef60f0e323fcf07c62d6bb4a63dad4030671788edea05c450967fb2543c37Deposit1176324872024-03-19 15:55:519 days 17 hrs ago0x5fcd5207fc508fd25db690f3a349b1a8f4040870 IN  Alchemix Finance: Transmuter ETH0 ETH0.00000196880.0199991
0x217fb028ae39882b0b1ab87849f747f88bc2065422d7cb5fe93285070b3819d6Withdraw1176321312024-03-19 15:43:599 days 18 hrs ago0x5fcd5207fc508fd25db690f3a349b1a8f4040870 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000029804810.0267979
0x3826c9a427fdb94ad1f57bfe5c2f3b229dc3688c64bc601e5ce7ac08e31807e7Deposit1176282052024-03-19 13:33:079 days 20 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000007588950.006067364
0xac54f568b9cbde4bb4277dceb86996593ba66d1bfa7a406790b199459fb4f5bdDeposit1175915892024-03-18 17:12:3510 days 16 hrs ago0x5fcd5207fc508fd25db690f3a349b1a8f4040870 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000015759730.0152442
0xe2a96a2d5475ed7c5df6bb47ff13df0872317b17f2b838fca0acea364d6ac595Deposit1175911032024-03-18 16:56:2310 days 16 hrs ago0x5fcd5207fc508fd25db690f3a349b1a8f4040870 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000016110170.011704
0x273e29e14b5d22ab1e483ee774652fd617fb58728a0de2726ccc0ef65375dae9Withdraw1175788932024-03-18 10:09:2310 days 23 hrs ago0xef80c44d996ebac95aa62589986fb3fcdfe3f7d9 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000008843470.007498717
0x4500b46138902b4fd975058e59486417e59f6345a086e746b4b35723983ca033Withdraw1175557842024-03-17 21:19:0511 days 12 hrs ago0x69ae169ce3f1e488ee2e44f8ac6501b3af945ac5 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000031938720.030417449
0xd565d0a76e8e50af5d499fb8b763de48cef994fbd9826731c12825fa14e0e904Deposit1175555832024-03-17 21:12:2311 days 12 hrs ago0x69ae169ce3f1e488ee2e44f8ac6501b3af945ac5 IN  Alchemix Finance: Transmuter ETH0 ETH0.0000038156250.030369519
0xc88af55bbe40f9002c668a8691eb82d9aa05644c88f12375242bd0ec6f6972b9Claim1175459902024-03-17 15:52:3711 days 17 hrs ago0x3b15cec2d922ab0ef74688bcc1056461049f89cb IN  Alchemix Finance: Transmuter ETH0 ETH0.0000020837140.01457098
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0xb7458522b5ae6c350ca369ac0a172052c482d25c357fe078eab16e1360c30ab81075545252023-07-30 9:03:47243 days 40 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0xb7458522b5ae6c350ca369ac0a172052c482d25c357fe078eab16e1360c30ab81075545252023-07-30 9:03:47243 days 40 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x900f5f5e822d71ccdf6b96837671b9cd0aeda145c5574c901db8097660fe21511075544702023-07-30 9:01:57243 days 42 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x900f5f5e822d71ccdf6b96837671b9cd0aeda145c5574c901db8097660fe21511075544702023-07-30 9:01:57243 days 42 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x6ef5d2b1fe4697ac71a28e648f2eb90f1511fa88fd4c12b93bbb65f66f561a971073145432023-07-24 19:44:23248 days 13 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x6ef5d2b1fe4697ac71a28e648f2eb90f1511fa88fd4c12b93bbb65f66f561a971073145432023-07-24 19:44:23248 days 13 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x44db9953d9e7278fa48d4d00743e856be9dcab23d4eb33793968886a91d071d61071678832023-07-21 10:15:43251 days 23 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x44db9953d9e7278fa48d4d00743e856be9dcab23d4eb33793968886a91d071d61071678832023-07-21 10:15:43251 days 23 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x17032531f5b70c8a2096fc5c4df2340394251fb09e47e163859b8f67a862588d1071662612023-07-21 9:21:39252 days 22 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x17032531f5b70c8a2096fc5c4df2340394251fb09e47e163859b8f67a862588d1071662612023-07-21 9:21:39252 days 22 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x0e353a5d54c64fb063f6c12ff2724fa2efe19c8f4f85221520665b7e1f907f211071659882023-07-21 9:12:33252 days 31 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x0e353a5d54c64fb063f6c12ff2724fa2efe19c8f4f85221520665b7e1f907f211071659882023-07-21 9:12:33252 days 31 mins ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0xc74a567fe1fab07c5084c4047a35781f4ae9af16b66c8a5040db1d6018227f4b1071507532023-07-21 0:44:43252 days 8 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0xc74a567fe1fab07c5084c4047a35781f4ae9af16b66c8a5040db1d6018227f4b1071507532023-07-21 0:44:43252 days 8 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0xcbe93409b7d0a2c687867a5ff9b25ad003f9bb1ca1876ec35d87ff45cf1ad5e51071506082023-07-21 0:39:53252 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0xcbe93409b7d0a2c687867a5ff9b25ad003f9bb1ca1876ec35d87ff45cf1ad5e51071506082023-07-21 0:39:53252 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x81fb249db04a97c3d09c3aa0d965d27a5ceee6cfa08f94c3b858960f4ad0723d1071505592023-07-21 0:38:15252 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Buffer alETH0 ETH
0x81fb249db04a97c3d09c3aa0d965d27a5ceee6cfa08f94c3b858960f4ad0723d1071505592023-07-21 0:38:15252 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x81fb249db04a97c3d09c3aa0d965d27a5ceee6cfa08f94c3b858960f4ad0723d1071505592023-07-21 0:38:15252 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0xadcdbbb673101032e150a325d4bfe150783f975314e6badfe90a5e40b5eb9b0d1071375692023-07-20 17:25:15252 days 16 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0xadcdbbb673101032e150a325d4bfe150783f975314e6badfe90a5e40b5eb9b0d1071375692023-07-20 17:25:15252 days 16 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x3e0543999082e7fb04b16e13689854305bea501541161ae3b2c58c142d6065421070948012023-07-19 17:39:39253 days 16 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 ETH
0x3e0543999082e7fb04b16e13689854305bea501541161ae3b2c58c142d6065421070948012023-07-19 17:39:39253 days 16 hrs ago Alchemix Finance: Transmuter Buffer alETH Alchemix Finance: Transmuter ETH0 ETH
0x7396a1fb5d5fd7f887f3d2e356a7955e7c7aee367231345c15ca559c658d0fa41070637322023-07-19 0:24:01254 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: alETH Token0 ETH
0x7396a1fb5d5fd7f887f3d2e356a7955e7c7aee367231345c15ca559c658d0fa41070637322023-07-19 0:24:01254 days 9 hrs ago Alchemix Finance: Transmuter ETH Alchemix Finance: Transmuter Code0 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

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Deployed Bytecode

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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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