ETH Price: $3,413.67 (-1.42%)
Gas: 5 Gwei

Token

Coinbase Wrapped Staked ETH (cbETH)
 

Overview

Max Total Supply

1,253,735.098223212439323384 cbETH

Holders

55,025 ( 0.016%)

Market

Price

$3,665.91 @ 1.073890 ETH (-1.66%)

Onchain Market Cap

$4,596,080,033.93

Circulating Supply Market Cap

$624,675,124.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.000296206843455857 cbETH

Value
$1.09 ( ~0.000319304054177404 Eth) [0.0000%]
0x73b161e2bbc5bd4981592747726af202c9869da7
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OVERVIEW

Coinbase Wrapped Staked ETH (“cbETH”) is a utility token and liquid representation of ETH staked through Coinbase. cbETH gives customers the option to sell, transfer, or otherwise use their staked ETH in dapps while it remains locked by the Ethereum protocol.

Market

Volume (24H):$3,479,095.00
Market Capitalization:$624,675,124.00
Circulating Supply:170,339.00 cbETH
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Coinbase Exchange
CBETH-USD$3,664.85
1.0731290 Eth
$525,402.00
143.362 CBETH
14.6034%
2
Uniswap V3 (Ethereum)
0XBE9895146F7AF43049CA1C1AE358B0541EA49704-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$3,670.37
1.0749460 Eth
$391,781.00
106.735 0XBE9895146F7AF43049CA1C1AE358B0541EA49704
10.8725%
3
Uniswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,666.86
1.0737940 Eth
$387,042.00
105.541 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
10.7508%
4
SwapBased V3
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,665.45
1.0727350 Eth
$317,144.00
86.505 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
8.8117%
5
Balancer V2
0X7F39C581F595B53C5CB19BD0B3F8DA6C935E2CA0-0XBE9895146F7AF43049CA1C1AE358B0541EA49704$3,671.63
1.0745490 Eth
$276,570.00
69.092 0X7F39C581F595B53C5CB19BD0B3F8DA6C935E2CA0
7.0380%
6
Pancakeswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0XB79DD08EA68A908A97220C76D19A6AA9CBDE4376$3,667.67
1.0750590 Eth
$264,422.00
71.488 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
7.2820%
7
Balancer V2 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,671.96
1.0758390 Eth
$261,194.00
71.121 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
7.2447%
8
Pancakeswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,674.60
1.0753970 Eth
$181,622.00
49.411 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
5.0332%
9
DackieSwap V3
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,673.91
1.0751970 Eth
$151,647.00
41.265 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
4.2034%
10
Coinbase Exchange
CBETH-ETH$3,670.16
1.0746850 Eth
$139,383.00
37.977 CBETH
3.8685%
11
Uniswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,669.89
1.0746830 Eth
$131,532.00
35.830 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
3.6498%
12
Uniswap V3 (Ethereum)
0XBE9895146F7AF43049CA1C1AE358B0541EA49704-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$3,669.41
1.0745410 Eth
$126,335.00
34.431 0XBE9895146F7AF43049CA1C1AE358B0541EA49704
3.5072%
13
Solidly V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,674.80
1.0744290 Eth
$116,812.00
31.781 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
3.2373%
14
Maverick Protocol (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,667.45
1.0733190 Eth
$87,499.00
23.858 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
2.4303%
15
Aerodrome SlipStream
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,667.73
1.0734090 Eth
$73,069.00
19.938 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
2.0310%
16
Curve (Ethereum)
0XBE9895146F7AF43049CA1C1AE358B0541EA49704-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$3,672.09
1.0752490 Eth
$68,348.00
18.613 0XBE9895146F7AF43049CA1C1AE358B0541EA49704
1.8960%
17
Uniswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0XC1CBA3FCEA344F92D9239C08C0568F6F2F0EE452$3,664.76
1.0731790 Eth
$52,997.00
14.469 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
1.4739%
18
Pancakeswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,672.66
1.0760430 Eth
$32,944.00
8.965 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.9132%
19
Aerodrome (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X833589FCD6EDB6E08F4C7C32D4F71B54BDA02913$3,669.05
1.0737880 Eth
$15,907.36
4.301 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.4381%
20
Aerodrome (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X74CCBE53F77B08632CE0CB91D3A545BF6B8E0979$3,645.96
1.0670290 Eth
$10,377.25
2.854 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.2907%
21
Aerodrome (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,661.43
1.0715580 Eth
$7,448.34
2.029 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.2067%
22
BaseSwap V3
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,665.58
1.0727740 Eth
$3,884.15
1.059 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.1079%
23
SushiSwap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,670.37
1.0743160 Eth
$2,574.66
0.701 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0714%
24
Curve (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,659.48
1.0730470 Eth
$2,546.92
0.696 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0709%
25
Uniswap V3 (Arbitrum One)
0X1DEBD73E752BEAF79865FD6446B0C970EAE7732F-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$3,665.39
1.0732870 Eth
$2,004.20
0.545 0X1DEBD73E752BEAF79865FD6446B0C970EAE7732F
0.0555%
26
Infusion
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,676.12
1.0750860 Eth
$1,993.23
0.544 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0554%
27
Aerodrome (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,682.83
1.0784710 Eth
$1,657.28
0.448 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0457%
28
Alien Base
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,664.66
1.0732990 Eth
$1,326.14
0.361 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0368%
29
Matcha (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,669.16
1.0746460 Eth
$1,223.51
0.333 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0340%
30
Pancakeswap V3 (Ethereum)
0XBE9895146F7AF43049CA1C1AE358B0541EA49704-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$3,667.89
1.0734480 Eth
$922.49
0.251 0XBE9895146F7AF43049CA1C1AE358B0541EA49704
0.0256%
31
SwapBased
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,691.13
1.0810510 Eth
$295.05
0.080 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0081%
32
Matcha (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0XD9AAEC86B65D86F6A7B5B1B0C42FFA531710B6CA$3,667.92
1.0864350 Eth
$156.13
0.043 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0043%
33
Soswap
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X833589FCD6EDB6E08F4C7C32D4F71B54BDA02913$3,669.10
1.0750030 Eth
$18.26
0.005 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0005%
34
Aerodrome SlipStream
0X236AA50979D5F3DE3BD1EEB40E81137F22AB794B-0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22$3,663.44
1.0735090 Eth
$7.25
0.000 0X236AA50979D5F3DE3BD1EEB40E81137F22AB794B
0.0000%
35
Matcha (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X833589FCD6EDB6E08F4C7C32D4F71B54BDA02913$3,639.73
1.0795080 Eth
$6.71
0.002 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0002%
36
Uniswap V3 (Base)
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0XDDF7D080C82B8048BAAE54E376A3406572429B4E$3,729.61
1.0759240 Eth
$3.47
0.001 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0001%
37
Infusion
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,626.07
1.0750570 Eth
$3.34
0.001 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0001%
38
Uniswap V3 (Base)
0X236AA50979D5F3DE3BD1EEB40E81137F22AB794B-0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22$3,680.97
1.0733200 Eth
$2.80
0.000 0X236AA50979D5F3DE3BD1EEB40E81137F22AB794B
0.0000%
39
Synthswap
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,675.67
1.0768730 Eth
$2.73
0.001 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0001%
40
BaseSwap
0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22-0X4200000000000000000000000000000000000006$3,661.44
1.0712270 Eth
$2.70
0.001 0X2AE3F1EC7F1F5012CFEAB0185BFC7AA3CF0DEC22
0.0001%
41
Matcha (Ethereum)
0XBE9895146F7AF43049CA1C1AE358B0541EA49704-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$3,698.95
1.0729660 Eth
$1.86
0.001 0XBE9895146F7AF43049CA1C1AE358B0541EA49704
0.0001%
42
Quickswap (v3)
0X4B4327DB1600B8B1440163F667E199CEF35385F5-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$3,689.83
1.0743940 Eth
$1.27
0.000 0X4B4327DB1600B8B1440163F667E199CEF35385F5
0.0000%
43
Matcha (Polygon)
0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270-0X4B4327DB1600B8B1440163F667E199CEF35385F5$3,698.20
1.0726850 Eth
$0.7129
1.269 0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270
0.1293%

Contract Source Code Verified (Exact Match)

Contract Name:
FiatTokenProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 1000000 runs

Other Settings:
default evmVersion
File 1 of 5 : FiatTokenProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018-2020 CENTRE SECZ
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import {
    AdminUpgradeabilityProxy
} from "../upgradeability/AdminUpgradeabilityProxy.sol";

/**
 * @title FiatTokenProxy
 * @dev This contract proxies FiatToken calls and enables FiatToken upgrades
 */
contract FiatTokenProxy is AdminUpgradeabilityProxy {
    constructor(address implementationContract)
        public
        AdminUpgradeabilityProxy(implementationContract)
    {}
}

File 2 of 5 : AdminUpgradeabilityProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import { UpgradeabilityProxy } from "./UpgradeabilityProxy.sol";

/**
 * @notice This contract combines an upgradeability proxy with an authorization
 * mechanism for administrative tasks.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/AdminUpgradeabilityProxy.sol
 * Modifications:
 * 1. Reformat, conform to Solidity 0.6 syntax, and add error messages (5/13/20)
 * 2. Remove ifAdmin modifier from admin() and implementation() (5/13/20)
 */
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
    /**
     * @dev Emitted when the administration has been transferred.
     * @param previousAdmin Address of the previous admin.
     * @param newAdmin Address of the new admin.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "org.zeppelinos.proxy.admin", and is
     * validated in the constructor.
     */
    bytes32
        private constant ADMIN_SLOT = 0x10d6a54a4754c8869d6886b5f5d7fbfa5b4522237ea5c60d11bc4e7a1ff9390b;

    /**
     * @dev Modifier to check whether the `msg.sender` is the admin.
     * If it is, it will run the function. Otherwise, it will delegate the call
     * to the implementation.
     */
    modifier ifAdmin() {
        if (msg.sender == _admin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Contract constructor.
     * It sets the `msg.sender` as the proxy administrator.
     * @param implementationContract address of the initial implementation.
     */
    constructor(address implementationContract)
        public
        UpgradeabilityProxy(implementationContract)
    {
        assert(ADMIN_SLOT == keccak256("org.zeppelinos.proxy.admin"));

        _setAdmin(msg.sender);
    }

    /**
     * @return The address of the proxy admin.
     */
    function admin() external view returns (address) {
        return _admin();
    }

    /**
     * @return The address of the implementation.
     */
    function implementation() external view returns (address) {
        return _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     * Only the current admin can call this function.
     * @param newAdmin Address to transfer proxy administration to.
     */
    function changeAdmin(address newAdmin) external ifAdmin {
        require(
            newAdmin != address(0),
            "Cannot change the admin of a proxy to the zero address"
        );
        emit AdminChanged(_admin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the backing implementation of the proxy.
     * Only the admin can call this function.
     * @param newImplementation Address of the new implementation.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeTo(newImplementation);
    }

    /**
     * @dev Upgrade the backing implementation of the proxy and call a function
     * on the new implementation.
     * This is useful to initialize the proxied contract.
     * @param newImplementation Address of the new implementation.
     * @param data Data to send as msg.data in the low level call.
     * It should include the signature and the parameters of the function to be
     * called, as described in
     * https://solidity.readthedocs.io/en/develop/abi-spec.html#function-selector-and-argument-encoding.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data)
        external
        payable
        ifAdmin
    {
        _upgradeTo(newImplementation);
        // prettier-ignore
        // solhint-disable-next-line avoid-low-level-calls
        (bool success,) = address(this).call{value: msg.value}(data);
        // solhint-disable-next-line reason-string
        require(success);
    }

    /**
     * @return adm The admin slot.
     */
    function _admin() internal view returns (address adm) {
        bytes32 slot = ADMIN_SLOT;

        assembly {
            adm := sload(slot)
        }
    }

    /**
     * @dev Sets the address of the proxy admin.
     * @param newAdmin Address of the new proxy admin.
     */
    function _setAdmin(address newAdmin) internal {
        bytes32 slot = ADMIN_SLOT;

        assembly {
            sstore(slot, newAdmin)
        }
    }

    /**
     * @dev Only fall back when the sender is not the admin.
     */
    function _willFallback() internal override {
        require(
            msg.sender != _admin(),
            "Cannot call fallback function from the proxy admin"
        );
        super._willFallback();
    }
}

File 3 of 5 : UpgradeabilityProxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

pragma solidity 0.6.12;

import { Proxy } from "./Proxy.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";

/**
 * @notice This contract implements a proxy that allows to change the
 * implementation address to which it will delegate.
 * Such a change is called an implementation upgrade.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/UpgradeabilityProxy.sol
 * Modifications:
 * 1. Reformat, conform to Solidity 0.6 syntax, and add error messages (5/13/20)
 * 2. Use Address utility library from the latest OpenZeppelin (5/13/20)
 */
contract UpgradeabilityProxy is Proxy {
    /**
     * @dev Emitted when the implementation is upgraded.
     * @param implementation Address of the new implementation.
     */
    event Upgraded(address implementation);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "org.zeppelinos.proxy.implementation", and is
     * validated in the constructor.
     */
    bytes32
        private constant IMPLEMENTATION_SLOT = 0x7050c9e0f4ca769c69bd3a8ef740bc37934f8e2c036e5a723fd8ee048ed3f8c3;

    /**
     * @dev Contract constructor.
     * @param implementationContract Address of the initial implementation.
     */
    constructor(address implementationContract) public {
        assert(
            IMPLEMENTATION_SLOT ==
                keccak256("org.zeppelinos.proxy.implementation")
        );

        _setImplementation(implementationContract);
    }

    /**
     * @dev Returns the current implementation.
     * @return impl Address of the current implementation
     */
    function _implementation() internal override view returns (address impl) {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            impl := sload(slot)
        }
    }

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

    /**
     * @dev Sets the implementation address of the proxy.
     * @param newImplementation Address of the new implementation.
     */
    function _setImplementation(address newImplementation) private {
        require(
            Address.isContract(newImplementation),
            "Cannot set a proxy implementation to a non-contract address"
        );

        bytes32 slot = IMPLEMENTATION_SLOT;

        assembly {
            sstore(slot, newImplementation)
        }
    }
}

File 4 of 5 : Proxy.sol
/**
 * SPDX-License-Identifier: MIT
 *
 * Copyright (c) 2018 zOS Global Limited.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

pragma solidity 0.6.12;

/**
 * @notice Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 * @dev Forked from https://github.com/zeppelinos/zos-lib/blob/8a16ef3ad17ec7430e3a9d2b5e3f39b8204f8c8d/contracts/upgradeability/Proxy.sol
 * Modifications:
 * 1. Reformat and conform to Solidity 0.6 syntax (5/13/20)
 */
abstract contract Proxy {
    /**
     * @dev Fallback function.
     * Implemented entirely in `_fallback`.
     */
    fallback() external payable {
        _fallback();
    }

    /**
     * @return The Address of the implementation.
     */
    function _implementation() internal virtual view returns (address);

    /**
     * @dev Delegates execution to an implementation contract.
     * This is a low level function that doesn't return to its internal call site.
     * It will return to the external caller whatever the implementation returns.
     * @param implementation Address to delegate.
     */
    function _delegate(address implementation) internal {
        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 Function that is run as the first thing in the fallback function.
     * Can be redefined in derived contracts to add functionality.
     * Redefinitions must call super._willFallback().
     */
    function _willFallback() internal virtual {}

    /**
     * @dev fallback implementation.
     * Extracted to enable manual triggering.
     */
    function _fallback() internal {
        _willFallback();
        _delegate(_implementation());
    }
}

File 5 of 5 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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
{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"implementationContract","type":"address"}],"stateMutability":"nonpayable","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":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","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"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000031724ca0c982a31fbb5c57f4217ab585271fc9a5

-----Decoded View---------------
Arg [0] : implementationContract (address): 0x31724cA0C982A31fbb5C57f4217AB585271fc9a5

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000031724ca0c982a31fbb5c57f4217ab585271fc9a5


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