Contract 0x67F2Bf6b579820DE54Dc51270a8811482feD6Cf1

Contract Overview

Balance:
353,347.490449735517938545 CRO

CRO Value:
$24,429.31 (@ $0.07/CRO)

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xf776cb4e1b488fc80d8e14866e8a15b3665f0c6bdc0737689fd30e3b7e312c95Deposit74931852023-03-21 8:19:2932 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,394 CRO1.096627740020
0x7dd7e9f3531334ac71d638979b997c6c10e36aba6cbc45a63fdc010d6ac76d37Deposit74924392023-03-21 7:09:151 hr 43 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,265 CRO1.0966356156850
0x6b703ebf84acf5b0386af2ba32631ca2b257b43147326385c029ca3b400e878fDeposit74916592023-03-21 5:55:482 hrs 56 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,225 CRO1.0966439125730
0xe936adb182aeb4a18ccf2da85aef345cf5db027337eebc7799a8a91205b06818Deposit74916492023-03-21 5:54:522 hrs 57 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,225 CRO1.1666091642310
0xe10af4c0c9e4d33885fd7a7a0866632c506043bd75fa742ea2b613a20036560cDeposit74805152023-03-20 12:25:5820 hrs 26 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,279 CRO1.0461417124850
0xd354b309d4f8100e2328c0c4e442e7e9c44360beb96049d349ede562201f607fDeposit74775812023-03-20 7:49:261 day 1 hr agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,370 CRO1.0967918939810
0x95f296b38e40c072e9cb128485f4723d96208fce482c2d778e629b909ba11d6cDeposit74775612023-03-20 7:47:331 day 1 hr agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,402 CRO1.166766690940
0x31f3358987797f089bfd0d2b1f3f73d4fb0a7d0e466967af8f564b9ae79c9acaDeposit74760722023-03-20 5:27:101 day 3 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,492 CRO1.0968077610360
0xcef3cd398283ef764b0e1a203e0424e87a2f4b0f1238cb8dd4c01cdee789b7b1Deposit74753622023-03-20 4:20:191 day 4 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,555 CRO1.0968152979470
0xab5a56131d2b7a45ac9ab043c7f59a7329b4475e1652175c4604dd91fcf5a8ecDeposit74745862023-03-20 3:07:121 day 5 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,271 CRO1.0968233764050
0xbb542b0086192ee3dbb931d5a204209dcc4cd881d78bc87a056a7b268860fcc2Deposit73718842023-03-13 9:47:377 days 23 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,813 CRO1.0978895632310
0x5e51676cfac2b0ad60299b31752410dfdc670230601dfb361c3d3049783201a4Deposit73708402023-03-13 8:09:208 days 43 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,770 CRO1.0979005547750
0x2b5e2b57384a532cf09e86805da87bd75acc7f8e96810b5f6984163c1941d539Deposit73702482023-03-13 7:13:388 days 1 hr agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,759 CRO1.0979068555520
0xe1275130114a3e31294a6ea9b947b41a912a6d941e1e7de3a91f7ae03a9810d2Deposit73692002023-03-13 5:34:598 days 3 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,748 CRO1.0979179309970
0x4efeccd774ad471bb40580a5ed83ce4cd30f1a6f6ef9f8234a2c84b9f0501a84Deposit73681822023-03-13 3:58:588 days 4 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf114,699 CRO1.0979286435480
0x20a6926367904d3cfb53544d07d3ebe6494c737aca52b8d644686dceb43bc4caDeposit71725142023-02-28 8:59:3120 days 23 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,561.6 CRO1.0999784911230
0xa8327c97777f0cb220126c06164837d5c6efc8872bd48f8e0b3745380e81ef00Deposit71723142023-02-28 8:40:4421 days 11 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,553.8 CRO1.0999806158850
0x97f98d8edaf61cb8aba0b02e73f565821a8a5bc23d2e6043478c2133ab26fb57Deposit71721662023-02-28 8:26:5021 days 25 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,552.5 CRO1.0999821916680
0x8164707a8db1592bc70ba7c819156ac087cf63197daac6e2ec11204847a22773Deposit70491032023-02-20 7:21:0129 days 1 hr agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,316 CRO1.1012843566210
0x9bed9d314ea99854d1cf298985db4875dda32cc77cd9b927c7aafe08f9d90166Deposit70488452023-02-20 6:56:4529 days 1 hr agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,235 CRO1.1715484569240
0x493a861991c0dc96732dbd8625dfdbd3121cae341673c70ed7b124320d5a1ca9Deposit70487902023-02-20 6:51:3429 days 2 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,250 CRO1.1222978287950
0xe0284030661452a4bf420fa3e3bef70dfb90eda39fce1fe24678ec660634efaeDeposit70487652023-02-20 6:49:1329 days 2 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,269 CRO1.1715493643550
0x8871a93a337754055dde8e16d00173f9a2dba634bb391496d81bcc5d86771d11Deposit70483042023-02-20 6:05:5029 days 2 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,325 CRO1.1012928002630
0x498033f5203115fec2afc0ca1f7497fe14c786037e6e2166ec0719d2a63d13a9Deposit70479652023-02-20 5:33:5929 days 3 hrs agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf112,404 CRO1.1012964169750
0x9b86fce3cf01e2fe55a1f09fdb8c7a9d384c010da284b1bf81ba6885e29bfb0dDeposit69425742023-02-13 8:09:4036 days 42 mins agoCronos ID: Deployer IN  0x67f2bf6b579820de54dc51270a8811482fed6cf113,131 CRO1.1024044064410
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xf776cb4e1b488fc80d8e14866e8a15b3665f0c6bdc0737689fd30e3b7e312c9574931852023-03-21 8:19:2932 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,878.8 CRO
0xf776cb4e1b488fc80d8e14866e8a15b3665f0c6bdc0737689fd30e3b7e312c9574931852023-03-21 8:19:2932 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,757.6 CRO
0x7dd7e9f3531334ac71d638979b997c6c10e36aba6cbc45a63fdc010d6ac76d3774924392023-03-21 7:09:151 hr 43 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,853 CRO
0x7dd7e9f3531334ac71d638979b997c6c10e36aba6cbc45a63fdc010d6ac76d3774924392023-03-21 7:09:151 hr 43 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,706 CRO
0x6b703ebf84acf5b0386af2ba32631ca2b257b43147326385c029ca3b400e878f74916592023-03-21 5:55:482 hrs 56 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,845 CRO
0x6b703ebf84acf5b0386af2ba32631ca2b257b43147326385c029ca3b400e878f74916592023-03-21 5:55:482 hrs 56 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,690 CRO
0xe936adb182aeb4a18ccf2da85aef345cf5db027337eebc7799a8a91205b0681874916492023-03-21 5:54:522 hrs 57 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,845 CRO
0xe936adb182aeb4a18ccf2da85aef345cf5db027337eebc7799a8a91205b0681874916492023-03-21 5:54:522 hrs 57 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,690 CRO
0x0365bdc2b0d7ea82ec1eaa73de0033165915a820fe6ff18a1b0cb5d4c893633674886682023-03-21 1:14:187 hrs 38 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router28.364730320138473131 CRO
0x0365bdc2b0d7ea82ec1eaa73de0033165915a820fe6ff18a1b0cb5d4c893633674886682023-03-21 1:14:187 hrs 38 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f956.729460640276946258 CRO
0x0365bdc2b0d7ea82ec1eaa73de0033165915a820fe6ff18a1b0cb5d4c893633674886682023-03-21 1:14:187 hrs 38 mins ago 0x0cb56f1c023b7ba29ddd7b9e30283ee3de2187d7 0x67f2bf6b579820de54dc51270a8811482fed6cf1141.823651600692365647 CRO
0xdc887e380aa7340e48553107f9a027e1d761da180bc8f40cc107690abafdf6c774863452023-03-20 21:35:3011 hrs 16 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router27.509551927714708118 CRO
0xdc887e380aa7340e48553107f9a027e1d761da180bc8f40cc107690abafdf6c774863452023-03-20 21:35:3011 hrs 16 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f955.019103855429416236 CRO
0xdc887e380aa7340e48553107f9a027e1d761da180bc8f40cc107690abafdf6c774863452023-03-20 21:35:3011 hrs 16 mins ago 0x0cb56f1c023b7ba29ddd7b9e30283ee3de2187d7 0x67f2bf6b579820de54dc51270a8811482fed6cf1137.54775963857354059 CRO
0x9c7df8f2eeb02f9cf226fb24eeca7c4d0bc68c8ffdeedafa9c09be727a9b2efe74831982023-03-20 16:38:5816 hrs 13 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router37.874026506301032429 CRO
0x9c7df8f2eeb02f9cf226fb24eeca7c4d0bc68c8ffdeedafa9c09be727a9b2efe74831982023-03-20 16:38:5816 hrs 13 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f975.748053012602064855 CRO
0x9c7df8f2eeb02f9cf226fb24eeca7c4d0bc68c8ffdeedafa9c09be727a9b2efe74831982023-03-20 16:38:5816 hrs 13 mins ago 0x0cb56f1c023b7ba29ddd7b9e30283ee3de2187d7 0x67f2bf6b579820de54dc51270a8811482fed6cf1189.370132531505162139 CRO
0xc856d69423b405f9a14f25e6eed6d5754d23a32e138276162492e68af91cab7774815182023-03-20 14:00:2618 hrs 51 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 Cronos: WCRO Token3,394.003978103305146577 CRO
0xe10af4c0c9e4d33885fd7a7a0866632c506043bd75fa742ea2b613a20036560c74805152023-03-20 12:25:5820 hrs 26 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,655.8 CRO
0xe10af4c0c9e4d33885fd7a7a0866632c506043bd75fa742ea2b613a20036560c74805152023-03-20 12:25:5820 hrs 26 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,311.6 CRO
0x60312c8c572132f8b4050c44742c4b1ee4a187e289a19d567434bb5c9f767a7474804892023-03-20 12:23:3220 hrs 28 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router37.220543806595133446 CRO
0x60312c8c572132f8b4050c44742c4b1ee4a187e289a19d567434bb5c9f767a7474804892023-03-20 12:23:3220 hrs 28 mins ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f974.441087613190266892 CRO
0x60312c8c572132f8b4050c44742c4b1ee4a187e289a19d567434bb5c9f767a7474804892023-03-20 12:23:3220 hrs 28 mins ago 0x0cb56f1c023b7ba29ddd7b9e30283ee3de2187d7 0x67f2bf6b579820de54dc51270a8811482fed6cf1186.10271903297566723 CRO
0xd354b309d4f8100e2328c0c4e442e7e9c44360beb96049d349ede562201f607f74775812023-03-20 7:49:261 day 1 hr ago 0x67f2bf6b579820de54dc51270a8811482fed6cf1 VVS Finance: Router2,674 CRO
0xd354b309d4f8100e2328c0c4e442e7e9c44360beb96049d349ede562201f607f74775812023-03-20 7:49:261 day 1 hr ago 0x67f2bf6b579820de54dc51270a8811482fed6cf10xec058e6a73ed6bb6145788f85562b27a25f097f95,348 CRO
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xc24205B12fB056822b2b2c42B5ee18272A0A8E74

Contract Name:
ERC1967Proxy

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 cronoscan.com on 2022-03-18
*/

// File contracts/proxy/Proxy.sol

// 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 {
    }
}


// File contracts/proxy/beacon/IBeacon.sol

pragma solidity ^0.8.0;

/**
 * @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);
}


// File contracts/utils/Address.sol

pragma solidity ^0.8.0;

/**
 * @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);
            }
        }
    }
}


// File contracts/utils/StorageSlot.sol

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
        }
    }
}


// File contracts/proxy/ERC1967/ERC1967Upgrade.sol

pragma solidity ^0.8.2;



/**
 * @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;
    }
}


// File contracts/proxy/ERC1967/ERC1967Proxy.sol

pragma solidity ^0.8.0;


/**
 * @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();
    }
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_logic","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"},{"stateMutability":"payable","type":"receive"}]

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Deployed ByteCode Sourcemap

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Swarm Source

ipfs://9b8470f06e8a3960c912103fc2be177edaad69584ee3c7d2809ee737e79408e7
Block Transaction Gas Used Reward
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