Token USD Coin

 

Overview ERC20

Price
$1.00 @ 0.000272 ETH (-0.02%)
Fully Diluted Market Cap
Total Supply:
1,198,920,434.725272 USDC

Holders:
536,131 addresses
Filtered by Token Holder (Marginly: WETH-USDC LP 2)

Balance
8,538.8014 USDC

Value
$8,537.96 ( ~2.3185 ETH) [0.0007%]
0x87e711bcb9ed1f2f6dec8fcc74cd2e0613d43b86
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OVERVIEW

USDC is a fully collateralized US Dollar stablecoin developed by CENTRE, the open source project with Circle being the first of several forthcoming issuers.

Market

Volume (24H):$10,384,688,038.00
Market Capitalization:$33,290,683,805.00
Circulating Supply:33,279,662,885.00 USDC
Market Data Source: Coinmarketcap


Update? Click here to update the token ICO / general information
# Exchange Pair Price  24H Volume % Volume
1
Binance
USDC-USDT$0.9998
0.0000140 Btc
$1,429,619,624.00
1,430,130,159.000 USDC
61.7944%
2
Uniswap V3 (Ethereum)
0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9995
0.0000140 Btc
$802,222,741.00
228,773.923 0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2
0.0099%
3
Bybit
ETH-USDC$1.00
0.0000140 Btc
$624,252,136.00
182,858.193 ETH
0.0079%
4
Bybit
BTC-USDC$1.00
0.0000140 Btc
$513,984,457.00
7,430.042 BTC
0.0003%
5
Bybit
USDC-USDT$0.9998
0.0000140 Btc
$283,050,986.00
283,158,828.170 USDC
12.2350%
6
LBank
ETH-USDC$0.9997
0.0000140 Btc
$270,864,464.00
73,718.104 ETH
0.0032%
7
LBank
BTC-USDC$0.9997
0.0000140 Btc
$246,831,110.00
3,464.245 BTC
0.0001%
8
Tapbit
ETH-USDC$1.00
0.0000140 Btc
$202,272,633.00
58,324.849 ETH
0.0025%
9
Tapbit
BTC-USDC$1.00
0.0000140 Btc
$195,088,667.00
2,810.843 BTC
0.0001%
10
OKX
ETH-USDC$0.9996
0.0000140 Btc
$172,273,695.00
50,150.359 ETH
0.0022%
11
Binance
BTC-USDC$0.9997
0.0000140 Btc
$168,111,618.00
2,415.604 BTC
0.0001%
12
OKX
BTC-USDC$0.9997
0.0000140 Btc
$161,495,182.00
2,324.833 BTC
0.0001%
13
Bitrue
BTC-USDC$1.00
0.0000140 Btc
$149,527,562.00
2,099.812 BTC
0.0001%
14
Bitrue
ETH-USDC$1.00
0.0000140 Btc
$135,376,277.00
36,874.696 ETH
0.0016%
15
DigiFinex
USDC-USDT$0.9997
0.0000140 Btc
$123,230,411.00
123,269,476.000 USDC
5.3263%
16
Binance
ETH-USDC$1.00
0.0000140 Btc
$122,286,523.00
35,509.071 ETH
0.0015%
17
DigiFinex
BTC-USDC$1.00
0.0000140 Btc
$90,701,842.00
1,272.936 BTC
0.0001%
18
Bitunix
USDC-USDT$0.9998
0.0000140 Btc
$79,924,077.00
79,933,155.348 USDC
3.4538%
19
DigiFinex
ETH-USDC$1.00
0.0000140 Btc
$65,272,764.00
17,727.640 ETH
0.0008%
20
Hotcoin
ETH-USDC$0.9999
0.0000140 Btc
$61,894,324.00
16,852.919 ETH
0.0007%
21
Deepcoin
USDC-USDT$1.00
0.0000140 Btc
$55,675,927.00
58,006,935.680 USDC
2.5064%
22
LATOKEN
USDC-USDT$0.9999
0.0000140 Btc
$51,870,800.00
51,874,635.089 USDC
2.2414%
23
OKX
USDC-USDT$0.9998
0.0000140 Btc
$37,978,582.00
37,993,881.515 USDC
1.6417%
24
XT.COM
ETH-USDC$0.9999
0.0000140 Btc
$30,502,020.00
8,860.570 ETH
0.0004%
25
Biconomy
ETH-USDC$0.9999
0.0000140 Btc
$28,272,536.00
8,511.240 ETH
0.0004%
26
Binance
SOL-USDC$0.9996
0.0000140 Btc
$26,247,601.00
144,178.835 SOL
0.0062%
27
FMFW.io
BTC-USDC$0.9999
0.0000140 Btc
$24,060,688.00
337.871 BTC
0.0000%
28
BingX
USDC-USDT$0.9997
0.0000140 Btc
$23,669,634.00
23,678,577.001 USDC
1.0231%
29
HitBTC
BTC-USDC$0.9997
0.0000140 Btc
$23,395,573.00
337.855 BTC
0.0000%
30
Kraken
USDC-USD$1.00
0.0000140 Btc
$21,077,357.00
21,077,356.924 USDC
0.9107%
31
Coinbase Exchange
USDT-USDC$0.9999
0.0000140 Btc
$19,106,431.00
19,105,433.010 USDT
0.8255%
32
Bitrue
USDC-USDT$0.9991
0.0000140 Btc
$17,448,675.00
17,464,304.300 USDC
0.7546%
33
BingX
ETH-USDC$1.00
0.0000140 Btc
$17,248,901.00
5,052.859 ETH
0.0002%
34
OKX
SOL-USDC$0.9996
0.0000140 Btc
$15,120,347.00
83,050.371 SOL
0.0036%
35
Bybit
SOL-USDC$1.00
0.0000140 Btc
$14,776,527.00
81,397.072 SOL
0.0035%
36
WhiteBIT
ETH-USDC$1.00
0.0000140 Btc
$13,939,619.00
3,793.262 ETH
0.0002%
37
HTX
USDC-USDT$0.9998
0.0000140 Btc
$13,663,044.00
13,664,694.104 USDC
0.5904%
38
FMFW.io
ETH-USDC$0.9999
0.0000140 Btc
$13,389,430.00
3,644.156 ETH
0.0002%
39
HitBTC
ETH-USDC$0.9996
0.0000140 Btc
$12,517,346.00
3,645.613 ETH
0.0002%
40
BingX
BTC-USDC$1.00
0.0000140 Btc
$11,707,192.00
168.991 BTC
0.0000%
41
Backpack Exchange
SOL-USDC$0.9997
0.0000140 Btc
$11,254,450.00
61,670.020 SOL
0.0027%
42
MEXC
USDC-USDT$0.9999
0.0000140 Btc
$10,612,841.00
10,613,472.290 USDC
0.4586%
43
PointPay
BTC-USDC$1.00
0.0000140 Btc
$10,479,073.00
150.265 BTC
0.0000%
44
Kraken
ETH-USDC$1.00
0.0000140 Btc
$10,440,632.00
2,837.339 ETH
0.0001%
45
KuCoin
ETH-USDC$0.9996
0.0000140 Btc
$10,080,784.00
2,742.883 ETH
0.0001%
46
XT.COM
USDC-USDT$0.9999
0.0000140 Btc
$10,061,748.00
10,063,465.480 USDC
0.4348%
47
Hotcoin
USDC-USDT$0.9999
0.0000140 Btc
$10,006,083.00
10,006,767.000 USDC
0.4324%
48
Kraken
USDC-USDT$0.9997
0.0000140 Btc
$8,692,814.00
8,695,569.724 USDC
0.3757%
49
WhiteBIT
BTC-USDC$1.00
0.0000140 Btc
$8,652,394.00
121.358 BTC
0.0000%
50
FMFW.io
USDT-USDC$0.9999
0.0000140 Btc
$8,538,857.00
8,538,995.000 USDT
0.3690%
51
Bit2Me
USDC-USDT$0.9999
0.0000140 Btc
$8,450,483.00
8,451,585.247 USDC
0.3652%
52
OKX
USDT-USDC$0.9996
0.0000140 Btc
$8,450,157.00
8,451,331.192 USDT
0.3652%
53
Biconomy
BTC-USDC$0.9999
0.0000140 Btc
$7,997,005.00
115.317 BTC
0.0000%
54
PointPay
USDC-USDT$0.9998
0.0000140 Btc
$7,894,790.00
7,896,347.534 USDC
0.3412%
55
Vertex (Spot)
WETH-USDC$0.9999
0.0000141 Btc
$7,851,902.00
2,275.940 WETH
0.0001%
56
Vertex (Spot)
WBTC-USDC$1.00
0.0000140 Btc
$7,422,064.00
106.348 WBTC
0.0000%
57
Cube
SOL-USDC$1.00
0.0000140 Btc
$7,148,963.00
39,169.820 SOL
0.0017%
58
Bitget
USDC-USDT$0.9997
0.0000140 Btc
$6,967,281.00
6,969,671.355 USDC
0.3012%
59
Phemex
USDC-USDT$0.9999
0.0000140 Btc
$6,787,907.00
6,788,266.700 USDC
0.2933%
60
Kraken
BTC-USDC$0.9997
0.0000140 Btc
$6,393,139.00
89.799 BTC
0.0000%
61
KuCoin
USDC-USDT$0.9997
0.0000140 Btc
$6,384,048.00
6,386,136.080 USDC
0.2759%
62
Pionex
USDC-USDT$1.00
0.0000140 Btc
$5,907,145.00
5,907,935.090 USDC
0.2553%
63
Cryptology
BTC-USDC$0.9999
0.0000140 Btc
$5,803,756.00
81.446 BTC
0.0000%
64
KuCoin
BTC-USDC$0.9996
0.0000140 Btc
$5,687,042.00
79.846 BTC
0.0000%
65
Bitstamp
USDC-USD$1.00
0.0000140 Btc
$5,629,886.00
5,629,829.281 USDC
0.2433%
66
Bitget
ETH-USDC$1.00
0.0000140 Btc
$5,263,867.00
1,551.709 ETH
0.0001%
67
Bitget
BTC-USDC$1.00
0.0000140 Btc
$4,594,372.00
66.692 BTC
0.0000%
68
Gate.io
USDC-USDT$0.9999
0.0000140 Btc
$3,953,576.00
3,954,241.347 USDC
0.1709%
69
MEXC
ETH-USDC$1.00
0.0000140 Btc
$3,855,997.00
1,049.343 ETH
0.0000%
70
Deribit Spot
USDC-USDT$0.9997
0.0000140 Btc
$3,596,864.00
3,596,821.000 USDC
0.1554%
71
Tapbit
USDC-USDT$0.9999
0.0000140 Btc
$3,324,956.00
3,325,737.665 USDC
0.1437%
72
BYDFi
BTC-USDC$0.9997
0.0000140 Btc
$3,323,765.00
46.651 BTC
0.0000%
73
PointPay
ETH-USDC$1.00
0.0000140 Btc
$3,077,799.00
891.008 ETH
0.0000%
74
Dexalot
USDT-USDC$0.9999
0.0000140 Btc
$3,076,152.00
3,075,802.952 USDT
0.1329%
75
Gemini
USDC-USD$1.00
0.0000140 Btc
$2,640,824.00
2,640,427.604 USDC
0.1141%
76
PointPay
DOGE-USDC$1.00
0.0000140 Btc
$2,286,114.00
14,349,764.500 DOGE
0.6200%
77
Backpack Exchange
BTC-USDC$0.9997
0.0000140 Btc
$2,174,772.00
31.146 BTC
0.0000%
78
C-Patex
USDC-USDT$0.9999
0.0000140 Btc
$2,083,252.00
2,083,431.107 USDC
0.0900%
79
Kraken
USDC-GBP$0.9985
0.0000140 Btc
$1,958,356.00
1,961,387.052 USDC
0.0847%
80
KuCoin
USDT-USDC$0.9996
0.0000140 Btc
$1,931,584.00
1,932,334.514 USDT
0.0835%
81
VALR
USDT-USDC$0.9997
0.0000140 Btc
$1,409,308.00
1,409,283.435 USDT
0.0609%
82
Bitfinex
UDC-USD$0.9989
0.0000140 Btc
$1,400,477.00
1,401,963.170 UDC
0.0606%
83
WhiteBIT
USDC-USDT$0.9999
0.0000140 Btc
$1,320,389.00
1,320,459.166 USDC
0.0571%
84
MEXC
BTC-USDC$1.00
0.0000140 Btc
$1,304,591.00
18.306 BTC
0.0000%
85
PointPay
FTM-USDC$1.00
0.0000140 Btc
$1,245,084.00
1,356,445.354 FTM
0.0586%
86
PointPay
BNB-USDC$1.00
0.0000140 Btc
$1,217,430.00
2,051.771 BNB
0.0001%
87
BYDFi
USDC-USDT$0.9999
0.0000140 Btc
$1,142,678.00
1,142,762.510 USDC
0.0494%
88
OKX
LTC-USDC$0.9996
0.0000140 Btc
$1,020,495.00
11,741.282 LTC
0.0005%
89
Vertex (Spot)
USDT-USDC$0.9999
0.0000141 Btc
$505,423.00
505,347.914 USDT
0.0218%
90
PointPay
TRX-USDC$1.00
0.0000140 Btc
$499,333.00
4,060,744.234 TRX
0.1755%
91
PointPay
UNI-USDC$1.00
0.0000140 Btc
$483,493.00
55,067.227 UNI
0.0024%
92
Slex
BTC-USDC$1.00
0.0000140 Btc
$463,309.00
6.654 BTC
0.0000%
93
HashKey Exchange
ETH-USDC$1.00
0.0000140 Btc
$410,338.00
120.472 ETH
0.0000%
94
KuCoin
XRP-USDC$1.00
0.0000140 Btc
$385,197.00
717,413.563 XRP
0.0310%
95
HashKey Exchange
BTC-USDC$1.00
0.0000140 Btc
$322,447.00
4.625 BTC
0.0000%
96
CoinEx
USDC-USDT$0.9995
0.0000140 Btc
$220,616.00
220,702.166 USDC
0.0095%
97
VALR
BTC-USDC$0.9997
0.0000140 Btc
$216,310.00
3.092 BTC
0.0000%
98
Bitfinex
UDC-USDT$0.9997
0.0000140 Btc
$210,887.00
210,943.290 UDC
0.0091%
99
Gate.io
BTC-USDC$0.9997
0.0000140 Btc
$204,087.00
2.932 BTC
0.0000%
100
HashKey Exchange
USDT-USDC$1.00
0.0000140 Btc
$67,356.00
67,374.801 USDT
0.0029%

Contract Source Code Verified (Exact Match)

Contract Name:
FiatTokenProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 10000000 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 : 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);
            }
        }
    }
}

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 : 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();
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 10000000
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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)

0000000000000000000000000f4fb9474303d10905ab86aa8d5a65fe44b6e04a

-----Decoded View---------------
Arg [0] : implementationContract (address): 0x0f4fb9474303d10905AB86aA8d5A65FE44b6E04A

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000f4fb9474303d10905ab86aa8d5a65fe44b6e04a


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