Token USD Coin (Arb1)

 

Overview ERC20

Price
$1.00 @ 0.000795 ETH (+0.08%)
Fully Diluted Market Cap
Total Supply:
627,101,625.740853 USDC

Holders:
242,888 addresses
Balance
0 USDC

Value
$0.00
0x6be3d7d863126cc1c8910ea4da7e833df7eccaac
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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):$1,621,430,585.00
Market Capitalization:$43,343,514,505.00
Circulating Supply:43,301,767,488.00 USDC
Market Data Source: Coinmarketcap


Update? Click here to update the token ICO / general information
# Exchange Pair Price  24H Volume % Volume
1
Uniswap (v3)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9993
0.0000588 Btc
$207,740,359.00
208,628,561.443 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.2388%
2
MEXC Global
ETH-USDC$1.001
0.0000589 Btc
$133,120,109.00
105,663.082 ETH
0.0001%
3
Kraken
USDC-USDT$1.001
0.0000589 Btc
$104,147,482.00
104,055,948.031 USDC
0.1191%
4
MEXC Global
BTC-USDC$1.001
0.0000589 Btc
$81,751,537.00
4,813.627 BTC
0.0000%
5
Bitforex
USDC-USDT$1.001
0.0000589 Btc
$68,430,176.00
68,350,704.673 USDC
0.0782%
6
Bitforex
BTC-USDC$1.001
0.0000589 Btc
$53,861,535.00
3,171.073 BTC
0.0000%
7
Uniswap (v3)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XDAC17F958D2EE523A2206206994597C13D831EC7$0.9993
0.0000588 Btc
$45,793,550.00
45,831,673.937 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0524%
8
Kyberswap Elastic (Arbitrum)
0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$1.00
0.0000589 Btc
$29,059,909.00
29,047,048.907 0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9
0.0332%
9
Uniswap (Arbitrum One)
0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$1.001
0.0000589 Btc
$24,787,026.00
19,595.096 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1
0.0000%
10
WhiteBIT
USDC-USDT$1.001
0.0000589 Btc
$23,371,638.00
23,353,835.089 USDC
0.0267%
11
XT.COM
USDC-USDT$1.00
0.0000589 Btc
$13,157,977.00
13,151,327.790 USDC
0.0151%
12
Huobi
USDC-USDT$1.00
0.0000589 Btc
$13,107,542.00
13,102,892.061 USDC
0.0150%
13
BitMart
BTC-USDC$1.001
0.0000589 Btc
$12,691,142.00
747.023 BTC
0.0000%
14
Uniswap (v3)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.9993
0.0000588 Btc
$12,597,109.00
12,590,909.313 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0144%
15
BingX
BTC-USDC$1.001
0.0000589 Btc
$10,956,921.00
645.610 BTC
0.0000%
16
Uniswap (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$1.001
0.0000589 Btc
$10,459,338.00
10,482,864.220 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0120%
17
BKEX
ETH-USDC$1.001
0.0000589 Btc
$9,966,320.00
7,865.415 ETH
0.0000%
18
WhiteBIT
BTC-USDC$1.001
0.0000589 Btc
$8,723,017.00
513.655 BTC
0.0000%
19
Bybit
ETH-USDC$1.001
0.0000589 Btc
$7,762,487.00
6,160.802 ETH
0.0000%
20
BKEX
BTC-USDC$1.001
0.0000589 Btc
$7,581,774.00
446.832 BTC
0.0000%
21
DigiFinex
USDC-USDT$1.001
0.0000589 Btc
$7,519,549.00
7,511,567.554 USDC
0.0086%
22
OKX
ETH-USDC$1.001
0.0000589 Btc
$7,049,691.00
5,562.803 ETH
0.0000%
23
Bybit
USDC-USDT$1.00
0.0000589 Btc
$5,312,099.00
5,310,238.750 USDC
0.0061%
24
DigiFinex
ETH-USDC$1.001
0.0000589 Btc
$5,103,955.00
4,049.520 ETH
0.0000%
25
BingX
ETH-USDC$1.001
0.0000589 Btc
$4,841,253.00
3,821.531 ETH
0.0000%
26
Kraken
USDC-USD$0.9999
0.0000589 Btc
$4,615,701.00
4,616,162.510 USDC
0.0053%
27
Uniswap (v3)
0X4FABB145D64652A948D72533023F6E7A623C7C53-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9993
0.0000588 Btc
$4,050,972.00
4,053,945.961 0X4FABB145D64652A948D72533023F6E7A623C7C53
0.0046%
28
KuCoin
USDC-USDT$1.001
0.0000589 Btc
$3,894,496.00
3,891,334.834 USDC
0.0045%
29
Uniswap (v3)
0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9993
0.0000588 Btc
$3,824,331.00
3,826,979.439 0X6B175474E89094C44DA98B954EEDEAC495271D0F
0.0044%
30
OKX
BTC-USDC$1.001
0.0000589 Btc
$3,605,131.00
212.476 BTC
0.0000%
31
Bybit
BTC-USDC$1.001
0.0000589 Btc
$3,507,535.00
206.553 BTC
0.0000%
32
BKEX
USDC-USDT$1.001
0.0000589 Btc
$3,430,641.00
3,428,905.574 USDC
0.0039%
33
KuCoin
BTC-USDC$1.00
0.0000589 Btc
$2,940,592.00
173.180 BTC
0.0000%
34
Sushiswap (Arbitrum One)
0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$1.005
0.0000592 Btc
$2,930,248.00
2,934,397.491 0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8
0.0034%
35
Uniswap (v2)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$1.002
0.0000590 Btc
$2,617,042.00
2,624,751.900 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0030%
36
MEXC Global
DOGE-USDC$1.001
0.0000589 Btc
$2,508,527.00
24,635,159.410 DOGE
0.0282%
37
KuCoin
ETH-USDC$1.00
0.0000589 Btc
$2,475,707.00
1,965.530 ETH
0.0000%
38
DigiFinex
BTC-USDC$1.001
0.0000589 Btc
$2,309,892.00
135.941 BTC
0.0000%
39
BitMart
ETH-USDC$1.001
0.0000589 Btc
$2,282,143.00
1,810.154 ETH
0.0000%
40
KuCoin
USDT-USDC$1.00
0.0000589 Btc
$2,018,506.00
2,017,639.663 USDT
0.0023%
41
Hotbit
USDC-USDT$0.9998
0.0000589 Btc
$1,863,495.00
1,863,931.120 USDC
0.0021%
42
MEXC Global
XRP-USDC$1.001
0.0000589 Btc
$1,751,969.00
4,476,504.870 XRP
0.0051%
43
Bitget
BTC-USDC$1.001
0.0000589 Btc
$1,681,310.00
99.055 BTC
0.0000%
44
Kraken
USDC-EUR$1.001
0.0000589 Btc
$1,564,917.00
1,563,421.188 USDC
0.0018%
45
Uniswap (v3)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XDAC17F958D2EE523A2206206994597C13D831EC7$0.9993
0.0000588 Btc
$1,528,722.00
1,530,713.951 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0018%
46
ZigZag (Arbitrum)
WETH-USDC$1.001
0.0000589 Btc
$1,386,761.00
1,103.070 WETH
0.0000%
47
Kraken
BTC-USDC$1.001
0.0000589 Btc
$1,381,587.00
81.353 BTC
0.0000%
48
Sushiswap
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$1.005
0.0000592 Btc
$1,192,110.00
1,192,029.860 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0014%
49
MEXC Global
AVAX-USDC$1.001
0.0000589 Btc
$1,055,971.00
77,243.200 AVAX
0.0001%
50
MEXC Global
BCH-USDC$1.001
0.0000589 Btc
$969,240.00
8,737.340 BCH
0.0000%
51
Binance US
USDC-USD$1.00
0.0000589 Btc
$914,832.00
914,832.026 USDC
0.0010%
52
MEXC Global
EOS-USDC$1.001
0.0000589 Btc
$913,231.00
979,025.600 EOS
0.0011%
53
Kraken
ETH-USDC$1.001
0.0000589 Btc
$898,227.00
712.514 ETH
0.0000%
54
Bitget
ETH-USDC$1.001
0.0000589 Btc
$884,986.00
697.094 ETH
0.0000%
55
Canto Dex
0X4E71A2E537B7F9D9413D3991D37958C0B5E1E503-0X80B5A32E4F032B2A058B4F29EC95EEFEEB87ADCD$1.001
0.0000589 Btc
$865,235.00
851,888.579 0X4E71A2E537B7F9D9413D3991D37958C0B5E1E503
0.0010%
56
MEXC Global
SOL-USDC$1.001
0.0000589 Btc
$853,003.00
63,271.150 SOL
0.0001%
57
KyberSwap Elastic (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XDAC17F958D2EE523A2206206994597C13D831EC7$1.001
0.0000589 Btc
$806,990.00
806,280.391 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0009%
58
MEXC Global
SHIB-USDC$1.001
0.0000589 Btc
$806,983.00
86,754,273,061.000 SHIB
99.2803%
59
Uniswap (v3)
0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9993
0.0000588 Btc
$743,157.00
44.022 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599
0.0000%
60
Gemini
USDC-USD$0.9993
0.0000588 Btc
$628,492.00
628,912.941 USDC
0.0007%
61
Coinsbit
BTC-USDC$1.001
0.0000589 Btc
$607,155.00
35.742 BTC
0.0000%
62
PancakeSwap (v2)
0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D-BUSD$0.9999
0.0000589 Btc
$599,406.00
598,044.622 0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D
0.0007%
63
Maiar
WEGLD-BD4D79-USDC-C76F1F$1.001
0.0000590 Btc
$551,698.00
12,606.526 WEGLD-BD4D79
0.0000%
64
Tidex
USDC-USDT$1.001
0.0000589 Btc
$526,457.00
526,167.079 USDC
0.0006%
65
BitMart
USDC-USDT$1.00
0.0000589 Btc
$484,394.00
484,222.020 USDC
0.0006%
66
PancakeSwap (v2)
0X2170ED0880AC9A755FD29B2688956BD959F933F8-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$1.00
0.0000589 Btc
$460,530.00
365.092 0X2170ED0880AC9A755FD29B2688956BD959F933F8
0.0000%
67
Bitget
XRP-USDC$1.001
0.0000589 Btc
$447,391.00
1,143,088.000 XRP
0.0013%
68
Tidex
BTC-USDC$1.001
0.0000589 Btc
$434,034.00
25.542 BTC
0.0000%
69
Quickswap
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$1.001
0.0000589 Btc
$430,590.00
427,742.812 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0005%
70
Coinbase Exchange
USDT-USDC$1.001
0.0000589 Btc
$421,029.00
420,718.550 USDT
0.0005%
71
Bitget
LTC-USDC$1.001
0.0000589 Btc
$407,789.00
5,320.265 LTC
0.0000%
72
MEXC Global
FTM-USDC$1.001
0.0000589 Btc
$395,358.00
1,635,830.070 FTM
0.0019%
73
MEXC Global
TRX-USDC$1.001
0.0000589 Btc
$394,558.00
7,289,889.860 TRX
0.0083%
74
BitMart
DOGE-USDC$1.001
0.0000589 Btc
$381,889.00
3,746,876.000 DOGE
0.0043%
75
Bitget
BCH-USDC$1.001
0.0000589 Btc
$317,050.00
2,852.589 BCH
0.0000%
76
Uniswap (v3)
0X1A7E4E63778B4F12A199C062F3EFDD288AFCBCE8-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9993
0.0000588 Btc
$287,828.00
274,527.272 0X1A7E4E63778B4F12A199C062F3EFDD288AFCBCE8
0.0003%
77
BKEX
APE-USDC$1.001
0.0000589 Btc
$282,560.00
71,365.412 APE
0.0001%
78
Velodrome Finance
0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$1.001
0.0000589 Btc
$282,183.00
280,357.081 0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9
0.0003%
79
BitMart
ADA-USDC$1.001
0.0000589 Btc
$273,712.00
847,028.000 ADA
0.0010%
80
Binance US
BTC-USDC$1.001
0.0000589 Btc
$271,181.00
15.958 BTC
0.0000%
81
Bibox
USDC-USDT$1.00
0.0000589 Btc
$265,865.00
265,757.000 USDC
0.0003%
82
PancakeSwap (v2)
0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D-USDT$0.9989
0.0000588 Btc
$242,661.00
242,144.680 0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D
0.0003%
83
Coinfield
BTC-USDC$0.9995
0.0000589 Btc
$234,179.00
13.803 BTC
0.0000%
84
Bybit
BIT-USDC$1.001
0.0000589 Btc
$164,501.00
533,059.450 BIT
0.0006%
85
BKEX
MATIC-USDC$1.001
0.0000589 Btc
$161,655.00
175,924.374 MATIC
0.0002%
86
Bitfinex
UDC-USDT$1.001
0.0000589 Btc
$159,330.00
159,144.715 UDC
0.0002%
87
Independent Reserve
USDC-AUD$0.9996
0.0000588 Btc
$155,186.00
155,245.725 USDC
0.0002%
88
BitMart
DAI-USDC$1.001
0.0000589 Btc
$152,473.00
152,345.000 DAI
0.0002%
89
BitMart
BUSD-USDC$1.001
0.0000589 Btc
$145,415.00
145,279.400 BUSD
0.0002%
90
Bitvavo
USDC-EUR$1.001
0.0000590 Btc
$142,075.00
141,903.661 USDC
0.0002%
91
Bitstamp
USDC-USD$0.9987
0.0000588 Btc
$139,063.00
139,245.444 USDC
0.0002%
92
CoinEx
USDC-USDT$1.002
0.0000590 Btc
$113,388.00
113,204.609 USDC
0.0001%
93
Okcoin
USDC-USD$1.001
0.0000589 Btc
$86,594.00
86,550.547 USDC
0.0001%
94
BKEX
ATOM-USDC$1.001
0.0000589 Btc
$82,959.00
8,144.420 ATOM
0.0000%
95
BKEX
SOL-USDC$1.001
0.0000589 Btc
$77,696.00
5,742.594 SOL
0.0000%
96
Bitstamp
USDC-EUR$1.001
0.0000589 Btc
$72,836.00
72,777.026 USDC
0.0001%
97
BKEX
NEAR-USDC$1.001
0.0000589 Btc
$53,953.00
31,666.026 NEAR
0.0000%
98
BitMart
MATIC-USDC$1.001
0.0000589 Btc
$49,395.00
53,941.000 MATIC
0.0001%
99
Coinsbit
USDC-USDT$1.001
0.0000589 Btc
$40,722.00
40,681.230 USDC
0.0000%
100
Bitstamp
BTC-USDC$1.001
0.0000589 Btc
$5,776.74
0.340 BTC
0.0000%

Contract Source Code Verified (Exact Match)

Contract Name:
TransparentUpgradeableProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license
/**
 *Submitted for verification at Etherscan.io on 2021-09-09
*/

// 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);
            }
        }
    }
}


/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 { revert(0, returndatasize()) }
            default { return(0, returndatasize()) }
        }
    }

    /**
     * @dev This is a virtual function that should be overriden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback () external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive () external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {
    }
}


/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 *
 * Upgradeability is only provided internally through {_upgradeTo}. For an externally upgradeable proxy see
 * {TransparentUpgradeableProxy}.
 */
contract UpgradeableProxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) public 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)
        }
    }
}


/**
 * @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) public 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 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();
    }

    /**
     * @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();
    }
}

Contract Security Audit

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

0000000000000000000000001efb3f88bc88f03fd1804a5c53b7141bbef5ded8000000000000000000000000d570ace65c43af47101fc6250fd6fc63d1c22a86000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _logic (address): 0x1efb3f88bc88f03fd1804a5c53b7141bbef5ded8
Arg [1] : admin_ (address): 0xd570ace65c43af47101fc6250fd6fc63d1c22a86
Arg [2] : _data (bytes): 0x

-----Encoded View---------------


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