Contract 0xf1069586fe7d5ed022c518c65879562a46fd42db

Txn Hash Method
Block
From
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Value [Txn Fee]
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0x62deeb0867517ff41d1da54ef255ba0dec646f7f7083b05b989537d2569154ab0x9c8d415658323212022-12-02 15:12:172 days 45 mins ago0xe825590307dd4f8cea4513b22af3b22da55851ca IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO8.8385519403490
0x20033c7f900d09605a3ec9ca4f3832e441e518f05ec055e9dc0f4fd5833145830x9c8d415658310072022-12-02 13:07:482 days 2 hrs ago0x2423c6f60bebe40ed0e9268cd843a38d12a61906 IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO1.0846053488080
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0x825d1ae9e857be58d73c38a3664e8057499677705b492e33e6e7aee576220bc70x9c8d415658158172022-12-01 13:10:053 days 2 hrs ago0x3d43b974b97891366db5952cbbf0583697b6ba37 IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO8.869865153187 4,866.009966523
0xe43ba2734a3eae18a64d874ef95b4a7ed51b2de7f8b047c3a56e24c328716dc20x2d3e874358072342022-11-30 23:39:193 days 16 hrs ago0x73bdf904fa541bdc89902a5ad901956f1a77e2ba IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO1.2264720703510
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0x0c070fe05583608a32bfcda7b7b27e9da592a4d6ef3d9d4512fdc9ff44ed560d0x788b432d57997202022-11-30 11:48:244 days 4 hrs ago0x587bcfba5ac7a1ba35e0d8daed1616198ab9470c IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO1.2807713196060
0x198908ad45fc4bb57ae315a0096b63a6489a437a69fe7d71bbb99fbd212584710x9c8d415657970262022-11-30 7:33:354 days 8 hrs ago0xe4a8c4b1a1cee11f2746cd3bb4898a908dfa46f8 IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO2.277729820364 4,866.871265524
0x0d6bf292bc7d1c6d75f5c1c659a1adfc1b8c6b6ff7f117a7ad8a42ce67e1f3a80x2d3e874357904502022-11-29 21:06:064 days 18 hrs ago0xf8f20a26bc1935a1c6c66e721cf9110953ae27a3 IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO4.8025810412390
0x0575f948b6896ec8f23996a484f9884f5c86b469065ed14e92fe6500b19ec3f10x9c8d415657899042022-11-29 20:13:554 days 19 hrs ago0xb9c627a94edf9f55e5f6917b6b0696e55660c7ed IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO1.3411813993470
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0xa0e32892809097dbbb91222f56c8f3f1334817998c1f56926c35adb9335a9f150x9c8d415657878862022-11-29 17:01:074 days 22 hrs ago0x5c79bb7b09ffef7aea78fc55cd3d050975e9a894 IN  0xf1069586fe7d5ed022c518c65879562a46fd42db0 CRO0.9690713662040
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
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0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x7edc3accb3b044fb914722c58eaf7465f040b931eb3b5656b37bf89717a64b0b58600252022-12-04 10:52:145 hrs 6 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0xd1f4bc91ba442d4ad40e6b7e0245b808c4f5d8766 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x00be21175454232045890c8917dadcb3048dd6282aa1925ed17c5b512ee9549d58589742022-12-04 9:13:176 hrs 44 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x8053a5754f97b7d32db9c887e405b28ceca00e486 CRO
0x20f558e791915dc0fdc383eeedd8cacb3db2d55c2a0eea4c2150b51a4f20a8fe58587342022-12-04 8:50:427 hrs 7 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x3f7ade3d02bedeccea1d49faa9ddd0c95fdafdcf6 CRO
0x20f558e791915dc0fdc383eeedd8cacb3db2d55c2a0eea4c2150b51a4f20a8fe58587342022-12-04 8:50:427 hrs 7 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x3f7ade3d02bedeccea1d49faa9ddd0c95fdafdcf6 CRO
0x20f558e791915dc0fdc383eeedd8cacb3db2d55c2a0eea4c2150b51a4f20a8fe58587342022-12-04 8:50:427 hrs 7 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x3f7ade3d02bedeccea1d49faa9ddd0c95fdafdcf6 CRO
0x2951a5536d4d815095d725838f9fee4cc3242e76aa45685c7174cf415abb420158534972022-12-04 0:37:5415 hrs 20 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x902dc1d8a22023369113f37545684879f4453c026 CRO
0x2951a5536d4d815095d725838f9fee4cc3242e76aa45685c7174cf415abb420158534972022-12-04 0:37:5415 hrs 20 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x902dc1d8a22023369113f37545684879f4453c026 CRO
0x2951a5536d4d815095d725838f9fee4cc3242e76aa45685c7174cf415abb420158534972022-12-04 0:37:5415 hrs 20 mins ago 0xf1069586fe7d5ed022c518c65879562a46fd42db0x902dc1d8a22023369113f37545684879f4453c026 CRO
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Loading
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 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
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