Contract 0x69540403fb839696c6bc02dff7623d664caeac82 1

 
Txn Hash Method
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0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8eCraft Treasures271438022022-09-28 6:46:3349 mins ago0x9de7b7ce0d4783209957d0253769bd54934b7a13 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00007603
0x7549845263a1cebc42cff9c6bc5522f808790b6ea7beb9f17ce20005eee91ecaCraft Treasures271432652022-09-28 6:43:5851 mins ago0x9de7b7ce0d4783209957d0253769bd54934b7a13 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00014212
0x8d70166b759c07a670d6ea5a64ffe416812d3b47982c411c4374ce79c69567e4Craft Treasures271409532022-09-28 6:32:471 hr 3 mins ago0x309bcc55fe9cca749cff42eb94a846823d27bce6 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00003975
0x0bc28a0b1052de4edc03af0f7635f09399b2131160b8ac62f09a64ae251237c8Craft Treasures271403802022-09-28 6:29:521 hr 6 mins ago0x309bcc55fe9cca749cff42eb94a846823d27bce6 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.0000399
0x2cecd10b28ef9d6189fe31e08954163e9c7cf88479a8d1d23e41f1a009a6f9d5Craft Treasures271344442022-09-28 5:56:591 hr 38 mins ago0x9db4f1c355cd9dccf22b8c571b9eca0a13ddd44c IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005201
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0x5e3b14cadcbe09a913fc70e5d09f7ac324f94655aff24a8695bf1fca4693335dCraft Treasures271231852022-09-28 4:52:152 hrs 43 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00004591
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0xd4400bd1798aae287bfacac52deae5284e97083d8076ea1ae8407ec62fe78474Craft Treasures271222972022-09-28 4:47:232 hrs 48 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005021
0xa9b4ed2ffe812c8c63d103de6fcc9cd890e0dc95ff081a23423cc923b391f287Craft Treasures271215612022-09-28 4:43:232 hrs 52 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00006749
0x9f9ce763682fa5f6b1460e5a228c23160259301cb6771caaf3634f7a2e988f5fCraft Treasures271210172022-09-28 4:40:102 hrs 55 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00006747
0x3c5660892b834d0e2cd7c69997bc960db2f2fb6c54251d7b7c115b9bdb84270aCraft Treasures271207592022-09-28 4:38:562 hrs 56 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00008057
0x316ab27f9fa46bc1ad32a469763822209c6205c96c4b4e8c46ca32f4fa38fd22Craft Treasures271205472022-09-28 4:37:492 hrs 58 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00006709
0x5e1ffb1806f846b4ec5db81f457f2afb93c352b7ccc6a62199d3836e69125893Craft Treasures271204082022-09-28 4:37:022 hrs 58 mins ago0xd758bf1da4b9683454b97988175aa6f9419c2b39 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005253
0x704efbdc90fa8c3a0ef7ce885219edddf970776d16ab8d456ae592c6d26d757fCraft Treasures271183712022-09-28 4:24:163 hrs 11 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00006112
0x2035d61b6daf388a54793b5274a689aa8f8884c69f50a9614e70079f1a22ca32Craft Treasures271183162022-09-28 4:23:493 hrs 12 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005664
0x083956bb00d2187e2aff4e71b2dc653e9fff0ee8f4b363c34fda52a5a010db7eCraft Treasures271182662022-09-28 4:23:253 hrs 12 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.0000547
0xf6377b33f4f7710d47f8c89c418cc4340368bd7047fbc5d96dad55222ea6bee3Craft Treasures271181892022-09-28 4:22:523 hrs 13 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00008759
0x61e0abf0273fe8dec0ce3570c7b56a61a6881987c2887c8973fc67e072edf175Craft Treasures271181082022-09-28 4:22:193 hrs 13 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00007065
0xce4817d982a108aba779f9294d975bbdccfebf3a084e3b75b8582b597bf27c48Craft Treasures271180062022-09-28 4:21:303 hrs 14 mins ago0xa8ac80946beb77b06c6c46a3d98859033e62f44a IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00007186
0x640af7541c5b13fb59a45c8f8f5a37b6c53d599300baa99fa48e1b729fecf9a3Craft Treasures271156492022-09-28 4:04:053 hrs 31 mins ago0x5600ff522af4782dee24727a306e13c6d810dc3c IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005784
0x3e0a6a0c758907d5d71f6c0acb9302ebc0a15f93b16240e6f646453d006055a6Craft Treasures271153362022-09-28 4:01:413 hrs 34 mins ago0x5600ff522af4782dee24727a306e13c6d810dc3c IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005806
0xbc6cc3eefa8035eba44fa99eaa467566f5e7b1214a5c363b45af15ca2635dd8bCraft Treasures271145632022-09-28 3:56:353 hrs 39 mins ago0x5600ff522af4782dee24727a306e13c6d810dc3c IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00005855
0xc5d381195f49196e9be3ab696b1060b39b01933c66fa61f7b0c435256ca265f3Craft Treasures271142802022-09-28 3:54:523 hrs 41 mins ago0x3abe492925611c4a6f1da4fc62e30bb48f5fcd91 IN  0x69540403fb839696c6bc02dff7623d664caeac820 ETH0.00065337
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0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xb9c9ed651eb173ca7fbc3a094da9ce33ec145a290 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 Treasure DAO: Treasures0 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x9b58fc8c7b224ae8479da7e6ed37ca4ac58099a90 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x756e4f3bb69c47d492abf2a52af320190c174c550 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xf3d00a2559d84de7ac093443bcaada5f4ee4165c0 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x99193ee9229b833d2aa4dbbda697c6600b9442860 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xfe8c1ac365ba6780aec5a985d989b327c27670a10 ETH
0x36faa5ca3379b2cdcb3ac08573d21dcfc0c8653286b4ce790f5c3cd316f2cf8b271536542022-09-28 7:32:453 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x6abd137afddec2c25158845dfcda03794bc507dd0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xb9c9ed651eb173ca7fbc3a094da9ce33ec145a290 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 Treasure DAO: Treasures0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x9b58fc8c7b224ae8479da7e6ed37ca4ac58099a90 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x756e4f3bb69c47d492abf2a52af320190c174c550 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xf3d00a2559d84de7ac093443bcaada5f4ee4165c0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x99193ee9229b833d2aa4dbbda697c6600b9442860 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xfe8c1ac365ba6780aec5a985d989b327c27670a10 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xb9c9ed651eb173ca7fbc3a094da9ce33ec145a290 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 Treasure DAO: Treasures0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x9b58fc8c7b224ae8479da7e6ed37ca4ac58099a90 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x756e4f3bb69c47d492abf2a52af320190c174c550 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xf3d00a2559d84de7ac093443bcaada5f4ee4165c0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x99193ee9229b833d2aa4dbbda697c6600b9442860 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xfe8c1ac365ba6780aec5a985d989b327c27670a10 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0xb9c9ed651eb173ca7fbc3a094da9ce33ec145a290 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 Treasure DAO: Treasures0 ETH
0x79911ad76bd6d010970e0c15d0785cf8d93068a3d5520b2a0c50da794f800d8e271438022022-09-28 6:46:3349 mins ago 0x69540403fb839696c6bc02dff7623d664caeac82 0x9b58fc8c7b224ae8479da7e6ed37ca4ac58099a90 ETH
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x6F4e8eBa4D337f874Ab57478AcC2Cb5BACdc19c9

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 999999 runs

Other Settings:
default evmVersion, MIT license
File 1 of 4 : Proxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @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 {
        // 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 virtual view 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 {
        _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 () payable external {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () payable external {
        _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 2 of 4 : TransparentUpgradeableProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "./UpgradeableProxy.sol";

/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 * 
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 * 
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 * 
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 * 
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative inerface of your proxy.
 */
contract TransparentUpgradeableProxy is UpgradeableProxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {UpgradeableProxy-constructor}.
     */
    constructor(address initialLogic, address initialAdmin, bytes memory _data) payable UpgradeableProxy(initialLogic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _setAdmin(initialAdmin);
    }

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @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 private constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     * 
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address) {
        return _admin();
    }

    /**
     * @dev Returns the current implementation.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     * 
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address) {
        return _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     * 
     * Emits an {AdminChanged} event.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external ifAdmin {
        require(newAdmin != address(0), "TransparentUpgradeableProxy: new admin is the zero address");
        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     * 
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeTo(newImplementation);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success,) = newImplementation.delegatecall(data);
        require(success);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view returns (address adm) {
        bytes32 slot = _ADMIN_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            adm := sload(slot)
        }
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        bytes32 slot = _ADMIN_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newAdmin)
        }
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal override virtual {
        require(msg.sender != _admin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

File 3 of 4 : UpgradeableProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "./Proxy.sol";
import "../utils/Address.sol";

/**
 * @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.
 * 
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is Proxy {
    /**
     * @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));
        _setImplementation(_logic);
        if(_data.length > 0) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success,) = _logic.delegatecall(_data);
            require(success);
        }
    }

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @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 private constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = _IMPLEMENTATION_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            impl := sload(slot)
        }
    }

    /**
     * @dev Upgrades the proxy to a new implementation.
     * 
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableProxy: new implementation is not a contract");

        bytes32 slot = _IMPLEMENTATION_SLOT;

        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, newImplementation)
        }
    }
}

File 4 of 4 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @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) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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);
            }
        }
    }
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract ABI

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