Contract 0x8316F9a27e6F632a54D1E1F21aF347D4E0Cc38Dd

Contract Overview

Balance:
0.0011015996 Ether
Txn Hash Method
Index
From
To
Value
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbdSwap41737562022-06-21 8:42:5711 days 21 hrs ago0xa8c15f4dda7b8c505cf4806b3e96e1cbaf7a3240 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000026220.00001
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be5563Swap38242362022-06-09 19:27:4523 days 10 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000016360.00001
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d710Swap38241622022-06-09 19:23:5223 days 10 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.000000002010.00001
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d86Swap38233892022-06-09 18:42:1923 days 11 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000016070.00001
0x7f75e69725ce962a163577357e0152afc46677c342704408bb8aae59a2ee4195Swap38233642022-06-09 18:41:0623 days 11 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000025310.00001
0x16d0abd8972bb4525b635e1e4ae058a0381292e7c23a4ee07914c8fca83e4498Swap38232422022-06-09 18:33:2323 days 11 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000025160.00001
0x8dadb7f04e05d1c7893dfd0a59152dba8b815384a03be8cee2b0a26ae745d004Swap38222562022-06-09 17:35:5423 days 12 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000025160.00001
0x0f73cc56406427c66eb76c373b3f6129df2157788ff450916353a460618efea3Swap38221502022-06-09 17:29:1623 days 12 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000025160.00001
0x076e549c776337d7289bb0af1fdb2827b658a258ff75a5b16609393fc836b361Swap34064992022-05-25 8:16:0538 days 21 hrs ago 0xbe8b73afe0d791dca27ea1afcb26f8028f52dea1 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.000000001510.00001
0xd2c8d8abce9cdd4fa25728d9bf94e63054ca0c11dbd38085fc2524db069b4ef8Swap33047692022-05-22 22:50:3141 days 7 hrs ago0xdac7a91516112703448b5d1fbc8b679fce838e8a IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000018410.00001
0x4002dcb2c36bcee13d967c85f978c2601ee95e74fabc46e6763deeff6fb5e282Swap33047552022-05-22 22:49:3141 days 7 hrs ago0xdac7a91516112703448b5d1fbc8b679fce838e8a IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000024210.00001
0x4992becf2f7cf05b61bc9f567e73148dae2ce27755c5b0f6f7eeea5a54984351Swap33047282022-05-22 22:47:5941 days 7 hrs ago0xdac7a91516112703448b5d1fbc8b679fce838e8a IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000020580.00001
0x3ac4591510e45d662a7ced98c16d177f4423a37f8368cd55788b3b50623ba129Swap29791312022-05-15 22:51:2848 days 7 hrs ago0x59a16e1183d511c8e98fb85b645230cd9ce547e5 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000018420.00001
0x3d868dc56e731d26f1bc5211ebbdcfeccde21e87a2b33d87a4abcc82b165c333Swap29700912022-05-15 15:15:5148 days 14 hrs ago0x69821779a55d799df2ede5d97199fe7c88b8c5c8 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000018540.00001
0x42741109b43fc6a8b1282a1d5c642e0635c2af3d1b237d59d30044b5387afb8bSwap29686552022-05-15 14:08:3148 days 16 hrs ago0xcf24f9db11d7cf69b1f6f438c1a5b576456f6df2 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000015390.00001
0x30084beba9f954eecbda34f1d1a23047a6e1aba994204fac3517ae1ab70038a7Swap For ETH27435142022-05-11 17:01:2452 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000017330.00001
0xc493aa9345d14755571a099eba67d3629dc6fcbb532c22fad6f5df592fab4e53Swap With ETH27433062022-05-11 16:55:3352 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0.01002 Ether0.0000000015150.00001
0xb1f13ad82027ef6e6eb36db537785ce04b8364cae391121f097cbc722ccb60c3Swap With ETH27432512022-05-11 16:54:2652 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0.01002 Ether0.0000000015150.00001
0x93c74078567b38ac93a816ed21d0173c49be0f0541de7c1e6c682a23e13e0850Swap27431032022-05-11 16:50:0052 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000016220.00001
0x5ee158fdd6669744058382cbe7bd01704597935c32234dfe5ed647621a69ad33Buy All Amount W...27426062022-05-11 16:35:1852 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0.1002 Ether0.000000002380.00001
0x2d2d860657902893d0bdba4116a0e31919c3439378967344ca1bdb40d523ab8aBuy All Amount F...27425772022-05-11 16:34:3152 days 13 hrs ago0xc96495c314879586761d991a2b68ebeab12c03fe IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000016730.00001
0xee14b67e5feeb25296ad3829f9d749f79320f69ab841a75cb684760fdd6fb2b2Swap25857362022-05-08 15:18:1655 days 14 hrs ago0x1982e55017dc6e4c917f3270c054a3f634aedbb4 IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000018410.00001
0x4c8025df713f5310b582adb16b793b33b608c3beb0432666ecc3d40b45663593Swap25825252022-05-08 12:42:2455 days 17 hrs ago0x1bd5a9236c88e586dcc6e4352ca8e3053627fd4b IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000014910.00001
0x45d5d96ac2a1f7b3ea77340d9a6edb4e318d3766761c64c21753882aab77060dSwap25823732022-05-08 12:35:1755 days 17 hrs ago0x1bd5a9236c88e586dcc6e4352ca8e3053627fd4b IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000015390.00001
0x9b7574589146deffc5c6e3355d2739141d516a45948dec86e77f057ac13de7d7Swap25823392022-05-08 12:33:5055 days 17 hrs ago0x1bd5a9236c88e586dcc6e4352ca8e3053627fd4b IN  0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0 Ether0.0000000025740.00001
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbd41737562022-06-21 8:42:5711 days 21 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0x42000000000000000000000000000000000000060 Ether
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbd41737562022-06-21 8:42:5711 days 21 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbd41737562022-06-21 8:42:5711 days 21 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x940578f6d9f9ffd9621f69dbb5b24fd3807997720 Ether
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbd41737562022-06-21 8:42:5711 days 21 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x940578f6d9f9ffd9621f69dbb5b24fd3807997720 Ether
0xd1c0dc0db223fb2e88236a164064b44293da2794967819b3bed2a274376eadbd41737562022-06-21 8:42:5711 days 21 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x9c719e37583b18bde22e9228e3e5b5012b6f07bb0 Ether
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be556338242362022-06-09 19:27:4523 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x79265ee50c18c6967a1f0db404dc1dfa2b28a8fa0 Ether
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be556338242362022-06-09 19:27:4523 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be556338242362022-06-09 19:27:4523 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be556338242362022-06-09 19:27:4523 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xa5ca9c9d07503c8bf8c16d1a785b822dc0735db5c68e784913fd8cb949be556338242362022-06-09 19:27:4523 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x9c719e37583b18bde22e9228e3e5b5012b6f07bb0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x79265ee50c18c6967a1f0db404dc1dfa2b28a8fa0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xa2620e1e4f9a0d3268f36b5bfa6b6ca6f12aa99b60cb964144f1b0052e22d71038241622022-06-09 19:23:5223 days 10 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x9c719e37583b18bde22e9228e3e5b5012b6f07bb0 Ether
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d8638233892022-06-09 18:42:1923 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xeb22f82de678852b8dff065768490b881dd0116a0 Ether
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d8638233892022-06-09 18:42:1923 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d8638233892022-06-09 18:42:1923 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xabb0bd8f9bafa670c8496af9609bd42d3f75bd150 Ether
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d8638233892022-06-09 18:42:1923 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0xabb0bd8f9bafa670c8496af9609bd42d3f75bd150 Ether
0xc36f7877ea6f9e7a7790ecda74169791de5267b8b04662109dceebae85772d8638233892022-06-09 18:42:1923 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x9c719e37583b18bde22e9228e3e5b5012b6f07bb0 Ether
0x7f75e69725ce962a163577357e0152afc46677c342704408bb8aae59a2ee419538233642022-06-09 18:41:0623 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd0x42000000000000000000000000000000000000060 Ether
0x7f75e69725ce962a163577357e0152afc46677c342704408bb8aae59a2ee419538233642022-06-09 18:41:0623 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
0x7f75e69725ce962a163577357e0152afc46677c342704408bb8aae59a2ee419538233642022-06-09 18:41:0623 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x940578f6d9f9ffd9621f69dbb5b24fd3807997720 Ether
0x7f75e69725ce962a163577357e0152afc46677c342704408bb8aae59a2ee419538233642022-06-09 18:41:0623 days 11 hrs ago 0x8316f9a27e6f632a54d1e1f21af347d4e0cc38dd 0x15db07a69f42a7c83e792fac0776e710cdcd3f3f0 Ether
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xb71a7B4893F237Df38eAB55dAF6086e60Ac735A9

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 1 runs

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

pragma solidity >=0.6.0 <0.8.0;

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 interface 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 _logic,
        address admin_,
        bytes memory _data
    ) payable UpgradeableProxy(_logic, _data) {
        assert(
            _ADMIN_SLOT ==
                bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1)
        );
        _setAdmin(admin_);
    }

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

    /**
     * @dev Emitted when the admin calls implementation()
     */
    event Implementation(address currentImplementation);

    /**
     * @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 admin_) {
        admin_ = _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 implementation_)
    {
        implementation_ = _implementation();
        emit Implementation(implementation_);
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        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 virtual 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
        virtual
        ifAdmin
    {
        _upgradeTo(newImplementation);
        Address.functionDelegateCall(newImplementation, data);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual 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 virtual override {
        require(
            msg.sender != _admin(),
            "TransparentUpgradeableProxy: admin cannot fallback to proxy target"
        );
        super._beforeFallback();
    }
}

File 2 of 4 : UpgradeableProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./OVMProxy.sol";
import "./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 OVMProxy {
    /**
     * @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) {
            Address.functionDelegateCall(_logic, _data);
        }
    }

    /**
     * @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
        view
        virtual
        override
        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 virtual {
        _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 3 of 4 : OVMProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 OVMProxy {
    /**
     * @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
        (bool success, bytes memory returndata) = implementation.delegatecall(
            msg.data
        );

        if (success) {
            assembly {
                return(add(returndata, 0x20), mload(returndata))
            }
        } else {
            assembly {
                revert(add(returndata, 0x20), mload(returndata))
            }
        }
    }

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

pragma solidity >=0.6.2 <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);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"admin_","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"stateMutability":"payable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"currentImplementation","type":"address"}],"name":"Implementation","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"implementation_","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Block Transaction Difficulty Gas Used Reward
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