Contract 0x00f5d01d86008d14d04e29efe88dffc75a9cac47 1

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x040c46aed176ea65f97e416b534cc9ea366c846366c82e42d17f0faf79f90982Set Approval For...232337772022-12-05 6:28:3924 mins ago0x17f6f264cf4316b230a968c4ce5f871bff762c77 IN  Chikn Farm: FarmLand Token0 AVAX0.001469862798 27.211115
0xc46f1dbd6e704305b2736e456837cc0a4faf4b286a97352209e901194c9e282fSet Approval For...232311852022-12-05 5:00:021 hr 52 mins ago0xdd1444397d3c68c0cf55aabdfa1daf040200bc46 IN  Chikn Farm: FarmLand Token0 AVAX0.0014336765 26.5
0x7820666854adf84f16fcf867239de9088a0ced1b093b84b764bf34003033319eTransfer From232269762022-12-05 2:34:134 hrs 18 mins ago0x7d53f718c8799110bd8598f9aad4a1fb109aa0ab IN  Chikn Farm: FarmLand Token0 AVAX0.00178695815 27.425
0x6c62d6f4deb4b818935219c4d40ae611e109e16b8370ce9ff86a97170e50d245Transfer From232268242022-12-05 2:29:064 hrs 23 mins ago0x33c5a71746ca53e464116da05587346fd9b540b7 IN  Chikn Farm: FarmLand Token0 AVAX0.001773159772 27.213232025
0x36d36700ba6e6ac17cdf0b001b4c5b539ba1f782dcdaa37dcd91b96e9b3ae45dTransfer From232256402022-12-05 1:48:425 hrs 4 mins ago0x7d53f718c8799110bd8598f9aad4a1fb109aa0ab IN  Chikn Farm: FarmLand Token0 AVAX0.002244136639 27.2816825
0xaa32e2ae9d09f54113970bf4d5c540547c873cb132b6bec0d4626d457a617812Set Price For Sa...232254192022-12-05 1:40:595 hrs 11 mins ago0xa0e3fc266c1cb7529da4b381745dd82a60b8f8cd IN  Chikn Farm: FarmLand Token0 AVAX0.001214367304 26.77058562
0xdd80d4b2b71307793fd52e63fc4ebd6530506c8caa4771023abff4f5f239edfcSet Price For Sa...232254192022-12-05 1:40:595 hrs 11 mins ago0xa3054d7e03e5c5c77fabb10524bf5239baf57a6b IN  Chikn Farm: FarmLand Token0 AVAX0.001828008 28
0x5608abec9ad75aa4d4fb2ce379c8d1e614cedd1b530ddee6ddd474876db072e9Transfer From232251422022-12-05 1:31:335 hrs 21 mins ago0xa8999b9b732582b88df0fcfced53cb21ecbdbcc5 IN  Chikn Farm: FarmLand Token0 AVAX0.001800887 26.5
0x6072b93d1929cef7bdc47c59fbc4e1cfb5577fbf1b5c23dd5ebeb332e88ec7b9Set Approval For...232243742022-12-05 1:05:315 hrs 47 mins ago0xc7c2a4db2762020c9aaa47fad95379c7fcd0be6c IN  Chikn Farm: FarmLand Token0 AVAX0.0014336765 26.5
0xc45af16b5f9bf61a3b6688f8ca2dcb08c867ea3d75fa4d2d017617b7b6aeabf2Transfer From232219542022-12-04 23:42:167 hrs 10 mins ago0x46e7bc113e1f0748ddd15b49975c9ddd8e348dd2 IN  Chikn Farm: FarmLand Token0 AVAX0.001726687 26.5
0xe0ce2a182c6c4ac3f91138a29eca629c08dd85671bcb6ddb7cd36d7eaeb33c79Transfer From232219422022-12-04 23:41:537 hrs 10 mins ago0x46e7bc113e1f0748ddd15b49975c9ddd8e348dd2 IN  Chikn Farm: FarmLand Token0 AVAX0.002179837 26.5
0xa0771e1bc2aad346ea142cc915be8ead5b8355d7e69f557225283bc395773a43Set Price For Sa...232219242022-12-04 23:41:127 hrs 11 mins ago0x46e7bc113e1f0748ddd15b49975c9ddd8e348dd2 IN  Chikn Farm: FarmLand Token0 AVAX0.001228838179 27.082430012
0x3bba54a272e7232095ba329eca541bc25da75efd950c6228222a2428d5497949Set Price For Sa...232210372022-12-04 23:10:077 hrs 42 mins ago0x9662d4d3fa8f707ed71900a10c3bd471dc4a049f IN  Chikn Farm: FarmLand Token0 AVAX0.001234105606 27.191327873
0xeba4c7a850e558f34c4a362a65b8b241d4135c34a1f750f308c795d1b757358eSet Price For Sa...232185052022-12-04 21:42:109 hrs 10 mins ago0x79b058e5845c24a132fedca6d149b9549b1e0d81 IN  Chikn Farm: FarmLand Token0 AVAX0.001730079 26.5
0x8abd950694af54a9840e164400cd4ab17b75ee8fd63fbb9947a5312de5e45c04Set Price For Sa...232180702022-12-04 21:27:199 hrs 25 mins ago0x8b939ff171546942074cb4e5793341dd7222601a IN  Chikn Farm: FarmLand Token0 AVAX0.001202729 26.5
0x898eb526c0dba3b6cd7edc1d4ea390eeadec1a4282e987069908d74a810ae973Set Approval For...232174812022-12-04 21:07:169 hrs 45 mins ago0x1d21d3d89b6d8af2daf48dedc4174eab977e775b IN  Chikn Farm: FarmLand Token0 AVAX0.001454332261 26.8818
0x7b4ee7a46f00cc0f9d0b42ad6de71882b8ae2f90f54d0419612b292902512b8fSet Price For Sa...232164882022-12-04 20:33:1810 hrs 19 mins ago0x61c072a4e969e25952d19775dc105565ad706d98 IN  Chikn Farm: FarmLand Token0 AVAX0.001212599004 26.717468051
0xeb3d746123a7299a6a58267a9dea57673a1ce6a6c2692e857ee694ef99e0eddcBuy Token232164192022-12-04 20:30:5810 hrs 21 mins ago0x966a80eccd9c8af908811890c5b6725291d978fa IN  Chikn Farm: FarmLand Token15.5 AVAX0.003106807 26.5
0xbcc2ed22ae42d09a3b4c34d866e03670d9fe7109118a82179b5a957a67fe4086Set Price For Sa...232163022022-12-04 20:26:5810 hrs 25 mins ago0xe4663ed171a471334ef995200cffc3c07ca0b764 IN  Chikn Farm: FarmLand Token0 AVAX0.001226327773 27.019957112
0x3e57cbd050fa98d67e71ac7a593ce63b5a81dfab9724a462a54946acb7a21e0aSet Price For Sa...232161532022-12-04 20:21:4610 hrs 31 mins ago0xe4663ed171a471334ef995200cffc3c07ca0b764 IN  Chikn Farm: FarmLand Token0 AVAX0.001142384184 26.825346
0x3d44c01c63d0b7dbb5095f85a3d3c0e9ac25c28a1f9496c9e4662505f719235dSet Price For Sa...232161312022-12-04 20:21:0010 hrs 31 mins ago0xe4663ed171a471334ef995200cffc3c07ca0b764 IN  Chikn Farm: FarmLand Token0 AVAX0.001751319538 26.825346
0xb64ae64517959dffd98deeeba2b89894c43df4b152c07f189e7e6df45e867986Set Price For Sa...232152952022-12-04 19:52:2911 hrs ago0x271b62547b10751de786dfb80220048eed7478a4 IN  Chikn Farm: FarmLand Token0 AVAX0.001202411 26.5
0xe83a2c82f68d6584cfd4ab4c70bac9287cab66b8162295e33e26fa7a4d568169Set Price For Sa...232138742022-12-04 19:03:4611 hrs 49 mins ago0x3c2cc1e798769c06a5cc75c146de966839b5ee58 IN  Chikn Farm: FarmLand Token0 AVAX0.001219734793 26.8818
0x1be013c1bfa47f26fc49fcbe77a6fc602ca255c00206d21d1d109a5cc65778b7Buy Token232117082022-12-04 17:49:3913 hrs 3 mins ago0xd0db1f4bd228f09a5e0dbf72e90967ab25cf651b IN  Chikn Farm: FarmLand Token13 AVAX0.003138529916 26.77058562
0x0aa58258654a8939640b9dbe1d23150c4910e248ec883b399cb5a9dd279887d2Set Price For Sa...232113172022-12-04 17:36:1113 hrs 16 mins ago0x61c072a4e969e25952d19775dc105565ad706d98 IN  Chikn Farm: FarmLand Token0 AVAX0.00124471105 27.425
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OVERVIEW

10,000 algorithmically generated, unique chikn NFTs that lay $egg.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xeb3d746123a7299a6a58267a9dea57673a1ce6a6c2692e857ee694ef99e0eddc232164192022-12-04 20:30:5810 hrs 21 mins ago Chikn Farm: FarmLand Token0x5249104bed5f3375d2222e9589d7417218ddb74114.57 AVAX
0xeb3d746123a7299a6a58267a9dea57673a1ce6a6c2692e857ee694ef99e0eddc232164192022-12-04 20:30:5810 hrs 21 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.93 AVAX
0x1be013c1bfa47f26fc49fcbe77a6fc602ca255c00206d21d1d109a5cc65778b7232117082022-12-04 17:49:3913 hrs 3 mins ago Chikn Farm: FarmLand Token0x441364fb8fbd54c54b2f178557b8ac6df9a147a612.22 AVAX
0x1be013c1bfa47f26fc49fcbe77a6fc602ca255c00206d21d1d109a5cc65778b7232117082022-12-04 17:49:3913 hrs 3 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.78 AVAX
0x1407c58108ac33643343d454e2d9ec3c8d542fbb493a6b53d39a12372b3974b2232068922022-12-04 15:04:4315 hrs 48 mins ago Chikn Farm: FarmLand Token0x1a5f1cc47f71067f736721360506b2a6250bcbdd35.72 AVAX
0x1407c58108ac33643343d454e2d9ec3c8d542fbb493a6b53d39a12372b3974b2232068922022-12-04 15:04:4315 hrs 48 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a552.28 AVAX
0x3a61a5f104d78812ed473ca94595120c2f94425134e7627932463c51ab9300a4232048122022-12-04 13:53:4516 hrs 59 mins ago Chikn Farm: FarmLand Token0x331f7daf8fb97e8ebb54a422da58d38b30acb3a412.9532 AVAX
0x3a61a5f104d78812ed473ca94595120c2f94425134e7627932463c51ab9300a4232048122022-12-04 13:53:4516 hrs 59 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.8268 AVAX
0xa2a4a1e9498e672e386612b6801bd062c52bda35306d35d8e60612cb04bfb107232047402022-12-04 13:51:1417 hrs 1 min ago Chikn Farm: FarmLand Token0x331f7daf8fb97e8ebb54a422da58d38b30acb3a412.22 AVAX
0xa2a4a1e9498e672e386612b6801bd062c52bda35306d35d8e60612cb04bfb107232047402022-12-04 13:51:1417 hrs 1 min ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.78 AVAX
0xeda9a3ec600b079b4141b891718c9040987c8bd9d76dc8b8f5594dbb97003dab232046742022-12-04 13:48:5717 hrs 3 mins ago Chikn Farm: FarmLand Token0x331f7daf8fb97e8ebb54a422da58d38b30acb3a412.22 AVAX
0xeda9a3ec600b079b4141b891718c9040987c8bd9d76dc8b8f5594dbb97003dab232046742022-12-04 13:48:5717 hrs 3 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.78 AVAX
0x6c851322d0287dd1e96b8438547d44342aca584a559dac1014ba6493fc7d573d232045862022-12-04 13:45:5517 hrs 6 mins ago Chikn Farm: FarmLand Token0x331f7daf8fb97e8ebb54a422da58d38b30acb3a411.28 AVAX
0x6c851322d0287dd1e96b8438547d44342aca584a559dac1014ba6493fc7d573d232045862022-12-04 13:45:5517 hrs 6 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.72 AVAX
0xecc22acf1a9d09ad5da302252eaf23c30206aebf72bb26b6a5b55eb30a362c7e232030992022-12-04 12:55:1317 hrs 57 mins ago Chikn Farm: FarmLand Token0xf1732885d4505bee2b00ea27546bf748cc447ea411.28 AVAX
0xecc22acf1a9d09ad5da302252eaf23c30206aebf72bb26b6a5b55eb30a362c7e232030992022-12-04 12:55:1317 hrs 57 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.72 AVAX
0xf4b8945d0c3183a8f3f9dbb2ddf32c6f5b34fa849c94f37c86827d1a0376c10c231997632022-12-04 10:59:3719 hrs 53 mins ago Chikn Farm: FarmLand Token0x39f130486283456afea838e1180627b05b39c79615.04 AVAX
0xf4b8945d0c3183a8f3f9dbb2ddf32c6f5b34fa849c94f37c86827d1a0376c10c231997632022-12-04 10:59:3719 hrs 53 mins ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.96 AVAX
0xe7af9ac9ac5d98eeddef6a20ee65030d8b0808c42d0b27b643dae9ca26aeb4c6231805292022-12-03 23:41:091 day 7 hrs ago Chikn Farm: FarmLand Token0x6948a0c8ec95bfb0967895f7fda5ed258d246cf918.7906 AVAX
0xe7af9ac9ac5d98eeddef6a20ee65030d8b0808c42d0b27b643dae9ca26aeb4c6231805292022-12-03 23:41:091 day 7 hrs ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a551.1994 AVAX
0xdb55266fdd52e1ffdb96ae78d8646f36a119e3e8e7cc3e76ebae4cc548817ef1231489992022-12-03 5:42:582 days 1 hr ago Chikn Farm: FarmLand Token0x331f7daf8fb97e8ebb54a422da58d38b30acb3a412.126 AVAX
0xdb55266fdd52e1ffdb96ae78d8646f36a119e3e8e7cc3e76ebae4cc548817ef1231489992022-12-03 5:42:582 days 1 hr ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a550.774 AVAX
0x7425e27044bd31558a9f9db409d195bbcf561a7e34e1f430883c7ba5a73c33bc230914272022-12-01 20:59:593 days 9 hrs ago Chikn Farm: FarmLand Token0xf7570fd2e891b7a14882c8a6bf7722291ddace7924.44 AVAX
0x7425e27044bd31558a9f9db409d195bbcf561a7e34e1f430883c7ba5a73c33bc230914272022-12-01 20:59:593 days 9 hrs ago Chikn Farm: FarmLand Token 0x5a52b8035c755f81bc516c910e642781e2c10a551.56 AVAX
0x0d7e900c858f6569bdffd46f9652bb7c09f20409675051cb19088cd32423e15f230835452022-12-01 16:33:153 days 14 hrs ago Chikn Farm: FarmLand Token0xf1732885d4505bee2b00ea27546bf748cc447ea432.9 AVAX
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This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.

Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x9702230a8ea53601f5cd2dc00fdbc13d4df4a8c7

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 snowtrace.io on 2021-11-10
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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 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 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 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 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 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 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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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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