Contract 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0

Contract Overview

Balance:
506,789.63315 CRO

CRO Value:
$56,861.80 (@ $0.11/CRO)

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xa84a1f4389b0141b036dde1c8385f621875adf296ce1b13e02d1ea5c42c448d1Make Offer34963672022-07-02 1:45:082 mins ago0xfa497948db0d208f6edaef0bffc018dd66944387 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b03,600 CRO1.019285 5,000
0x6b9b40eef292e9a2e684efa3acd80f8f5985ad4a3dd543a1c501065a0c40d6c3Cancel Offer34963582022-07-02 1:44:163 mins ago0xfa497948db0d208f6edaef0bffc018dd66944387 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO0.50058 5,000
0x157f6c3b3b29111709c0016a41ec4efc958a9007557732d7dc177595199fe193Make Offer34963462022-07-02 1:43:084 mins ago0xdf186c978915b1dd1234ab4df6d26fe928c398f3 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b013 CRO0.894550
0x6b93249120fa2ea9fcc4cc41428945e473174b2b850d7cdb85e3d9f46e3adc18Cancel Offer34963182022-07-02 1:40:286 mins ago0x229d39ecfade62d49a5535e8e7157a805f4e75c3 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO0.500520
0x4569553c73d4eec5559a625068f0984a0cba907dd33f11a67710dffdeaa434f2Make Offer34962952022-07-02 1:38:179 mins ago0xb8e484f66e9a33614cb4f592854ef35b39fa150a IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0175 CRO0.90498593460
0x2cca3ea3f535432161df448f61c9712432d8cdfe82909c1d9b814d341f018907Make Offer34962812022-07-02 1:36:5710 mins ago0x229d39ecfade62d49a5535e8e7157a805f4e75c3 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0330 CRO1.03770
0x1508752c0ff9339fdcc0c1f0b7480886d7fec8865cd7f39239013e1a83248cb0Cancel Offer34962652022-07-02 1:35:2611 mins ago0x410cbe30fc825e788366fb63638fab5e1649f331 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO0.4975435648150
0x003fcc33b5fcddeeee6baddb25354703a8dc230225bc009f3cc46983f0d91972Make Offer34958802022-07-02 0:58:5848 mins ago0x634a5dc4cda63ea8d0699d9387cdcfffc6408b84 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0100 CRO1.03347076590
0xc0f4fa9470a6e8ce82adf84c7a2c119c02fce27a2119f60fca113f6dec5bf48fMake Offer34958722022-07-02 0:58:1349 mins ago0x7d3912ff4a6197e87b7425fe281a25526c4a6a4c IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0485 CRO0.88786 5,000
0x7aebde6906b488fd78ed74708080c3f31a8de78bee1a6ccaae691918f8dda7ebMake Offer34958372022-07-02 0:54:5352 mins ago0x2aaa07a0a722ab93a27183277f5e92d50fc248f1 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0150 CRO0.95656 5,000
0xfe26ee01d8534cd571638281fb7a74b315cb37304409cef801a908b864dcbd50Make Offer34958292022-07-02 0:54:0853 mins ago0x44473b3356906d6ae34299ddf53020f131fa0835 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0140 CRO0.95656 5,000
0x67fd4cf7ea79acfaecb2727341d8b47b47ac5e2a0ec312aed97aead634f804acMake Offer34958252022-07-02 0:53:4653 mins ago0x2aaa07a0a722ab93a27183277f5e92d50fc248f1 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0150 CRO0.95656 5,000
0xe9ad8548417e006262fe14dae4a93fa25e468ef25488dd9cc76dd0a41d504ad1Make Offer34958142022-07-02 0:52:4354 mins ago0xab509c38a9e3d2a5c3fb47a4a389d269f804890b IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0150 CRO0.647320
0x404dd52d7eb87f2c31dfcbd47df4d91d8f99af56f3dd1149d40ef4abab08ec55Accept Offer34956602022-07-02 0:38:081 hr 9 mins ago0x514d30c2526598a634c5686e8a235fc4f2aa850f IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO3.067475744405 4,971.791033047
0x34a2ac1d99c05e8250afea81d0d75da0fee6e735d5a767aa00dac3b36b4f26a1Make Offer34956072022-07-02 0:33:081 hr 14 mins ago0x6d7cc1045bb46e1c697f4d3db88df3e2453e8c5b IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0225 CRO1.03507 5,000
0x96f0c15e8389dd7419c385a377edb731bd676ac21667f9d78f81567dd11c02dbMake Offer34955342022-07-02 0:26:101 hr 21 mins ago0x4f8a2e1f5b7b13e372f05796eb07ddaabe9a311b IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0450 CRO0.9258270010080
0x89305d09047c973e7ea032be11e9afb9f8b54a513ab5efa545441f31455de327Make Offer34955182022-07-02 0:24:401 hr 22 mins ago0x514d30c2526598a634c5686e8a235fc4f2aa850f IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0160 CRO1.03036 5,000
0x0b768e73677b5006c85f6ddef00340d62de149dfb7d7175435a78469e627fa3dReject Offer34954982022-07-02 0:22:471 hr 24 mins ago0x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO0.670145 5,000
0x1909b912afa0d587578cd986f2eec45d42110b47bb6e0a6f1ce83cc2e78b7cd8Reject Offer34954942022-07-02 0:22:241 hr 24 mins ago0x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO0.670145 5,000
0xa85df108ca5467245394cfec244dab76d32a01d61c779790d937a177b2defc61Accept Offer34954702022-07-02 0:20:071 hr 27 mins ago0x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO3.139332861257 4,971.798623529
0x77f225324512a7e16e0fd5d66976e23498d1a41877a70ff03160fa88a073f087Accept Offer34954642022-07-02 0:19:331 hr 27 mins ago0x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO3.086114870602 4,971.79885199
0xf3260b577a2d12f19a5337554ceb47b13d131d910129739cb0e1f017fb21c0dfAccept Offer34954562022-07-02 0:18:471 hr 28 mins ago0x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00 CRO3.139333204372 4,971.799166924
0xa98887ed3d3196c8a88e1e3e1f78e438e0209f787574dc280b6129a0d93bbd0cMake Offer34954192022-07-02 0:15:161 hr 32 mins ago0xd40b39e4c1c39bd9bd7b3ac459c9b7354d025a09 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0750 CRO1.03171 5,000
0x484a9115d155d0fc154028ecaf2faeceb85f8ed8f5c14d5e17a4ed3ab8cd07f2Make Offer34954142022-07-02 0:14:481 hr 32 mins ago0xd40b39e4c1c39bd9bd7b3ac459c9b7354d025a09 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0800 CRO1.03171 5,000
0x2334839c99d32d0f575b229da429175c4b0aa3217b615dbb449293c0d9bdb981Make Offer34953972022-07-02 0:13:111 hr 34 mins ago0xd40b39e4c1c39bd9bd7b3ac459c9b7354d025a09 IN  0x016b347aeb70cc45e3bbaf324feb3c7c464e18b01,550 CRO1.03102 5,000
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x6b9b40eef292e9a2e684efa3acd80f8f5985ad4a3dd543a1c501065a0c40d6c334963582022-07-02 1:44:163 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xfa497948db0d208f6edaef0bffc018dd669443873,600 CRO
0x6b93249120fa2ea9fcc4cc41428945e473174b2b850d7cdb85e3d9f46e3adc1834963182022-07-02 1:40:286 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x229d39ecfade62d49a5535e8e7157a805f4e75c3330 CRO
0x1508752c0ff9339fdcc0c1f0b7480886d7fec8865cd7f39239013e1a83248cb034962652022-07-02 1:35:2611 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x410cbe30fc825e788366fb63638fab5e1649f3315,149 CRO
0x404dd52d7eb87f2c31dfcbd47df4d91d8f99af56f3dd1149d40ef4abab08ec5534956602022-07-02 0:38:081 hr 9 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x514d30c2526598a634c5686e8a235fc4f2aa850f221.25 CRO
0x404dd52d7eb87f2c31dfcbd47df4d91d8f99af56f3dd1149d40ef4abab08ec5534956602022-07-02 0:38:081 hr 9 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0xeb074cc764f20d8fe4317ab63f45a85bce2becb11.875 CRO
0x404dd52d7eb87f2c31dfcbd47df4d91d8f99af56f3dd1149d40ef4abab08ec5534956602022-07-02 0:38:081 hr 9 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a31.875 CRO
0x404dd52d7eb87f2c31dfcbd47df4d91d8f99af56f3dd1149d40ef4abab08ec5534956602022-07-02 0:38:081 hr 9 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a325 CRO
0x0b768e73677b5006c85f6ddef00340d62de149dfb7d7175435a78469e627fa3d34954982022-07-02 0:22:471 hr 24 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xd40b39e4c1c39bd9bd7b3ac459c9b7354d025a091,550 CRO
0x1909b912afa0d587578cd986f2eec45d42110b47bb6e0a6f1ce83cc2e78b7cd834954942022-07-02 0:22:241 hr 24 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xd40b39e4c1c39bd9bd7b3ac459c9b7354d025a091,500 CRO
0xa85df108ca5467245394cfec244dab76d32a01d61c779790d937a177b2defc6134954702022-07-02 0:20:071 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d748 CRO
0xa85df108ca5467245394cfec244dab76d32a01d61c779790d937a177b2defc6134954702022-07-02 0:20:071 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0xeb074cc764f20d8fe4317ab63f45a85bce2becb16 CRO
0xa85df108ca5467245394cfec244dab76d32a01d61c779790d937a177b2defc6134954702022-07-02 0:20:071 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a36 CRO
0xa85df108ca5467245394cfec244dab76d32a01d61c779790d937a177b2defc6134954702022-07-02 0:20:071 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a340 CRO
0x77f225324512a7e16e0fd5d66976e23498d1a41877a70ff03160fa88a073f08734954642022-07-02 0:19:331 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d1,683 CRO
0x77f225324512a7e16e0fd5d66976e23498d1a41877a70ff03160fa88a073f08734954642022-07-02 0:19:331 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0xeb074cc764f20d8fe4317ab63f45a85bce2becb113.5 CRO
0x77f225324512a7e16e0fd5d66976e23498d1a41877a70ff03160fa88a073f08734954642022-07-02 0:19:331 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a313.5 CRO
0x77f225324512a7e16e0fd5d66976e23498d1a41877a70ff03160fa88a073f08734954642022-07-02 0:19:331 hr 27 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a390 CRO
0xf3260b577a2d12f19a5337554ceb47b13d131d910129739cb0e1f017fb21c0df34954562022-07-02 0:18:471 hr 28 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x44d3ea2ce47a9ea3190be77c9a3105f4fac56d3d701.25 CRO
0xf3260b577a2d12f19a5337554ceb47b13d131d910129739cb0e1f017fb21c0df34954562022-07-02 0:18:471 hr 28 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0xeb074cc764f20d8fe4317ab63f45a85bce2becb15.625 CRO
0xf3260b577a2d12f19a5337554ceb47b13d131d910129739cb0e1f017fb21c0df34954562022-07-02 0:18:471 hr 28 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a35.625 CRO
0xf3260b577a2d12f19a5337554ceb47b13d131d910129739cb0e1f017fb21c0df34954562022-07-02 0:18:471 hr 28 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b0 0x7a3cdb2364f92369a602cae81167d0679087e6a337.5 CRO
0x3ddd5c250d6ac1f33df898d6b07e792ac92937b1bc10a094ced506a0d349824034953632022-07-02 0:09:591 hr 37 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00x229d39ecfade62d49a5535e8e7157a805f4e75c3260 CRO
0x53d91baa5384c27edebc4f2417cefa21192000afb13d62270f70df384e1fec4434952492022-07-01 23:59:121 hr 48 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xd5cd731d196226cd4f80fa91dab28f5d53ab8264233 CRO
0xbfd0cf4d23bc8481245f53a888a64ea81e03b9228b78f8dce37286b810583d6b34952382022-07-01 23:58:101 hr 49 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xd5cd731d196226cd4f80fa91dab28f5d53ab8264777 CRO
0xaa2209ee1babf58e98e210a05a86443ca337daea257618356ad7dde6755ce18634951862022-07-01 23:53:131 hr 54 mins ago 0x016b347aeb70cc45e3bbaf324feb3c7c464e18b00xfa497948db0d208f6edaef0bffc018dd669443875,555 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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