Contract 0x21C90bcE2943dD2B706248E906D4DF9637be27C4

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

Token:
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x7d8aa17416157b0141a55c08c515c909537b51ada95f605e8139a48b61312d2c0xe99a3f80295641372022-06-14 16:38:0010 days 20 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.0122349743 37.279587748
0x87173ff2d46e763322ec221df6735cde4d02ecc231d76135f556975b2a391c240xe99a3f80295078332022-06-13 6:57:5012 days 6 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.045447533622 131.900967683
0x8a2d100ca4302ea54afa4d85de1d816c6540018f948e763f8a473e2965d85eae0xe99a3f80295078202022-06-13 6:57:2412 days 6 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.047545870453 137.990905606
0x271b910dccd5f30ec2062c41b074c7a78d66920f4854715539fa3922ed59f7e20xe99a3f80295077872022-06-13 6:56:1812 days 6 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.048144106659 139.727147997
0x682c9fd5a6a0be7dabe20a69f1b4f7cc46c5dbfa5f43e57d3814a560989a50a50xe99a3f80295076442022-06-13 6:51:2012 days 6 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.040577340371 123.642420147
0xa2e31a40ced502cadb119e4fef406f8ea798490db58a3c84740c77d89a19ae4d0xe99a3f80295076172022-06-13 6:50:2612 days 6 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.046758398987 135.415800946
0xc3b296914be1ecb99f5f2390a4e767130045c3c226fe9585c2601bd9e581ad9e0xe99a3f80294290682022-06-11 8:35:0014 days 4 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.010849740005 30.000000015
0x555a91b039218501d92b8280292028616764748556ea766921bb169a9cbce0720xe99a3f80294222072022-06-11 4:38:5214 days 8 hrs ago0x0a56c3405674a582514989ba0ecbaf9aa1bc9e35 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.010357980004 30.000000013
0x8f7524da87f3d80eb5e4e04b296aafa309367259b67f2f7c802234768e8d2c9b0xe99a3f80294034342022-06-10 17:30:5014 days 19 hrs ago0xfe008049ac2d185c4c7ead09af460fff170bf60a IN  0x21c90bce2943dd2b706248e906d4df9637be27c40.5 MATIC0.008502660194 30.280021062
0xd1321fcb90188c7aed8e0627505dc4b0be136312d04242d201bf874b16e3ce310xe2864fe3293993612022-06-10 15:06:3614 days 22 hrs ago0x57655a256b27fbd736a719be7858927a951d9bdd IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.002019757436 31.267047027
0xace1a1ec97fe1f0b6fda93617468b618e697c9a4c347e0cd840fedca31c2998b0xe99a3f80293842062022-06-10 5:55:1615 days 7 hrs ago0x8c0ac4f35cef8211a1dcce20d58e8dcbea500bec IN  0x21c90bce2943dd2b706248e906d4df9637be27c43 MATIC0.00912471811 30.000026666
0xd1b375b9e37e51422aa4589484fd715a40134d62877cd8dbb365f80cc8b5f8390xe99a3f80293028402022-06-08 5:02:1017 days 8 hrs ago0x39599fee90874b03b8768d325b3c42d7b91549f7 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40.25 MATIC0.00986826041 30.000001248
0xe2a3d8581dc23e86f892c57a7e0c1096518b4b6b69b0021c777da6c0f32368a70xe99a3f80292170512022-06-06 1:05:0119 days 12 hrs ago0x0a56c3405674a582514989ba0ecbaf9aa1bc9e35 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.013052593047 42.680359974
0x053b67996b8075501c52379704911afe39f48ae5651ef42a3ab11c2fe457a8700xe99a3f80291556572022-06-04 13:05:0721 days 23 mins ago0x8efe1d89c57788bc033b99e18a4fa137e92fc9c8 IN  0x21c90bce2943dd2b706248e906d4df9637be27c415 MATIC0.009191700007 30.000000025
0x906c7d193929cabf26f45a08074cf5146f967c3fdd35695c12efbde0f467e43c0xe2864fe3291296932022-06-03 21:27:2821 days 16 hrs ago0xe97ff52931b01ba3c21bd09577c10452ca0f4468 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.003617654305 56.055507778
0x3ecfb2c4e0291d549b9d0c48fa19021c9c8278c138ef97c6ea120369938327040xe99a3f80291161742022-06-03 13:24:5022 days 3 mins ago0x8efe1d89c57788bc033b99e18a4fa137e92fc9c8 IN  0x21c90bce2943dd2b706248e906d4df9637be27c48 MATIC0.01588226192 55.073884618
0xca197c9d1b151d74e038a8bce1843b28ba8ed131f8a339b4c2d2195f2cb54cdb0xe2864fe3290969832022-06-03 2:08:5622 days 11 hrs ago0xe97ff52931b01ba3c21bd09577c10452ca0f4468 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.001930710009 30.000000149
0x7e7e04e58c9c7d2c1f8db256d3b599a24a13edd3ff3b35d1b67b06a6bbd89bfb0xe2864fe3290650522022-06-02 7:28:3523 days 5 hrs agoBunga Collection: Deployer IN  0x21c90bce2943dd2b706248e906d4df9637be27c40 MATIC0.001995438999 30.99999999
0x0958c0236e62f83f6ec88a84b195144055e5d2779732172893cb721bf1eb992a0xe99a3f80290082042022-05-31 21:55:1224 days 15 hrs ago0xd9c1c4292b0458628025b1ec69ca1128cea9c8c5 IN  0x21c90bce2943dd2b706248e906d4df9637be27c42 MATIC0.01814148 60
0x6eacb30de9248937afffde85e6e95abb54dccf0fbae2e5b8aa5486cdd18e7c860xe99a3f80290080272022-05-31 21:49:0524 days 15 hrs ago0xd9c1c4292b0458628025b1ec69ca1128cea9c8c5 IN  0x21c90bce2943dd2b706248e906d4df9637be27c42 MATIC0.01814148 60
0xf4fcde8a2ef20021392b00158c1cfbe8e034f01f1d790a7d5b2c91a351ae488d0xe99a3f80290079592022-05-31 21:46:4524 days 15 hrs ago0xd9c1c4292b0458628025b1ec69ca1128cea9c8c5 IN  0x21c90bce2943dd2b706248e906d4df9637be27c42 MATIC0.01814148 60
0xa803bc4f42f6a0b669a37095aef12a787ee2e377dbba2ea623f274b29938b49a0xe99a3f80290078722022-05-31 21:43:4724 days 15 hrs ago0xd9c1c4292b0458628025b1ec69ca1128cea9c8c5 IN  0x21c90bce2943dd2b706248e906d4df9637be27c41 MATIC0.01814178 60
0xe23bef1654aff03379f7d8f7a090cd7a055b6c18b10fd27778f4e3864a6de5a20xe99a3f80290078212022-05-31 21:42:0124 days 15 hrs ago0xd9c1c4292b0458628025b1ec69ca1128cea9c8c5 IN  0x21c90bce2943dd2b706248e906d4df9637be27c41 MATIC0.01814178 60
0xac357191853c119fb7a8410b09cf0b7919c3e0ed00ab8419337033c33a160c460xe99a3f80289562822022-05-30 14:47:0525 days 22 hrs ago0x0a56c3405674a582514989ba0ecbaf9aa1bc9e35 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40.5 MATIC0.009612086251 30.832377719
0x1d9d0ae77083562798eaa4135dda0d659f842a4a7c24f80caf254cdeaa813e820xe99a3f80289557882022-05-30 14:30:0925 days 22 hrs ago0x0a56c3405674a582514989ba0ecbaf9aa1bc9e35 IN  0x21c90bce2943dd2b706248e906d4df9637be27c40.25 MATIC0.008217630005 30.000000021
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0x8f7524da87f3d80eb5e4e04b296aafa309367259b67f2f7c802234768e8d2c9b294034342022-06-10 17:30:5014 days 19 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xe8121150df932f5cb040535226e28de995bbf1470.45 MATIC
0x8f7524da87f3d80eb5e4e04b296aafa309367259b67f2f7c802234768e8d2c9b294034342022-06-10 17:30:5014 days 19 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Bunga Collection: Deployer0.05 MATIC
0xace1a1ec97fe1f0b6fda93617468b618e697c9a4c347e0cd840fedca31c2998b293842062022-06-10 5:55:1615 days 7 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xfe890268748ba08c358ea563d13b31f69bc743073 MATIC
0xd1b375b9e37e51422aa4589484fd715a40134d62877cd8dbb365f80cc8b5f839293028402022-06-08 5:02:1017 days 8 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xe8121150df932f5cb040535226e28de995bbf1470.25 MATIC
0x053b67996b8075501c52379704911afe39f48ae5651ef42a3ab11c2fe457a870291556572022-06-04 13:05:0721 days 23 mins ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer12.75 MATIC
0x053b67996b8075501c52379704911afe39f48ae5651ef42a3ab11c2fe457a870291556572022-06-04 13:05:0721 days 23 mins ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xa6ba9c02fc368837babac2aa42c0bcec40fa7fb90.75 MATIC
0x053b67996b8075501c52379704911afe39f48ae5651ef42a3ab11c2fe457a870291556572022-06-04 13:05:0721 days 23 mins ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer1.5 MATIC
0x3ecfb2c4e0291d549b9d0c48fa19021c9c8278c138ef97c6ea12036993832704291161742022-06-03 13:24:5022 days 3 mins ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Bunga Collection: Deployer7.2 MATIC
0x3ecfb2c4e0291d549b9d0c48fa19021c9c8278c138ef97c6ea12036993832704291161742022-06-03 13:24:5022 days 3 mins ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Bunga Collection: Deployer0.8 MATIC
0x0958c0236e62f83f6ec88a84b195144055e5d2779732172893cb721bf1eb992a290082042022-05-31 21:55:1224 days 15 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xb7edef49a051ce18b7387a03c42eeb0d7b56b0032 MATIC
0x6eacb30de9248937afffde85e6e95abb54dccf0fbae2e5b8aa5486cdd18e7c86290080272022-05-31 21:49:0524 days 15 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xb7edef49a051ce18b7387a03c42eeb0d7b56b0032 MATIC
0xf4fcde8a2ef20021392b00158c1cfbe8e034f01f1d790a7d5b2c91a351ae488d290079592022-05-31 21:46:4524 days 15 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xb7edef49a051ce18b7387a03c42eeb0d7b56b0032 MATIC
0xa803bc4f42f6a0b669a37095aef12a787ee2e377dbba2ea623f274b29938b49a290078722022-05-31 21:43:4724 days 15 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xb7edef49a051ce18b7387a03c42eeb0d7b56b0031 MATIC
0xe23bef1654aff03379f7d8f7a090cd7a055b6c18b10fd27778f4e3864a6de5a2290078212022-05-31 21:42:0124 days 15 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xb7edef49a051ce18b7387a03c42eeb0d7b56b0031 MATIC
0xac357191853c119fb7a8410b09cf0b7919c3e0ed00ab8419337033c33a160c46289562822022-05-30 14:47:0525 days 22 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c40xe8121150df932f5cb040535226e28de995bbf1470.5 MATIC
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0xd2c43b436899a5de275d0fe5b8f3563e238d3be64f2f43416506e1dedd48a15a289099822022-05-29 11:12:4227 days 2 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0x867e14e83ec84cc2dc3fc632c0592f34bd720e19916bd96c2b4602a6850d1652289000862022-05-29 5:15:0927 days 8 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0x95cc01f2a45f24c3ce45fc325f0bdf8fb6ca2f6d7f10509b33bd9aac85497e76288988122022-05-29 4:31:1927 days 8 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer100 MATIC
0xcc4f3287fd650a06ab84633cb17f4f8c05a329b9dc094d2e779f8b2c973da9b6288987942022-05-29 4:30:4327 days 8 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer100 MATIC
0xbadcbaa2e3786c6d0c679588e74f512f47db3695cf5f47465b1d38c5107c0e7c288987152022-05-29 4:28:0127 days 9 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0x7fc406b55594fb8cfc8d051ae6fdbf6ae9e0ba5296b1f09ac6960a2a23bf0e0f288987152022-05-29 4:28:0127 days 9 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0xd65652a280c9627be48a274b1b5a507700d6491574f946ce17ab09d491c5c103288986302022-05-29 4:25:0727 days 9 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0x9ce8f7f201cc8b3de5e1c8f40dea3e8522b7c05bfaba246b6a625974cdb49f80288982972022-05-29 4:13:3727 days 9 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
0xf6fc9755bbbc0b06df45b461b003b83f74c60057e38a3fdf4f3cdac4f9a08120288977812022-05-29 3:55:5127 days 9 hrs ago 0x21c90bce2943dd2b706248e906d4df9637be27c4Cryptato Planet: Deployer15 MATIC
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x5841565Bd231a868e47347d9749eF06AF5cA0970

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.8.2+commit.661d1103

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-06-12
*/

// 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 Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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