Token Bridged USDC

 

Overview ERC20

Price
$1.00 @ 0.000529 ETH (-0.18%)
Fully Diluted Market Cap
Total Supply:
1,146,557,120.67966 USDC.e

Holders:
543,750 addresses
Balance
77,346.281658 USDC.e

Value
$77,328.65 ( ~40.8874 ETH) [0.0067%]
0xb8df652ccb5cb39ac1cd98a899639f8463b103a8
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OVERVIEW

This is a bridged USDC token deployed by Arbitrum Foundation.

Market

Volume (24H):$3,243,014,244.00
Market Capitalization:$28,920,675,747.00
Circulating Supply:28,940,968,792.00 USDC.e
Market Data Source: Coinmarketcap


Update? Click here to update the token ICO / general information
# Exchange Pair Price  24H Volume % Volume
1
Binance
USDC-USDT$1.00
0.0000369 Btc
$211,320,987.00
211,321,989.104 USDC
0.7315%
2
Bybit
BTC-USDC$1.00
0.0000369 Btc
$132,265,056.00
4,885.597 BTC
0.0000%
3
Uniswap V3 (Arbitrum One)
0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$1.00
0.0000369 Btc
$108,913,125.00
57,942.757 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1
0.0002%
4
Bybit
ETH-USDC$1.00
0.0000369 Btc
$90,708,605.00
47,954.534 ETH
0.0002%
5
Biconomy
BTC-USDC$0.9996
0.0000369 Btc
$82,397,617.00
3,053.122 BTC
0.0000%
6
LBank
ETH-USDC$0.9996
0.0000369 Btc
$50,543,069.00
26,729.735 ETH
0.0001%
7
Kraken
USDC-USD$0.9998
0.0000369 Btc
$32,976,503.00
32,983,100.011 USDC
0.1142%
8
Toobit
USDC-USDT$0.9998
0.0000369 Btc
$24,265,501.00
24,267,445.000 USDC
0.0840%
9
Bybit
USDC-USDT$1.001
0.0000370 Btc
$22,819,125.00
22,803,941.620 USDC
0.0789%
10
Kraken
USDC-EUR$1.00
0.0000369 Btc
$17,738,435.00
17,736,610.111 USDC
0.0614%
11
Biconomy
ETH-USDC$0.9996
0.0000369 Btc
$16,917,715.00
8,997.459 ETH
0.0000%
12
Uniswap V3 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$0.9993
0.0000369 Btc
$16,629,959.00
16,539,094.736 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0572%
13
WhiteBIT
USDC-USDT$0.9992
0.0000369 Btc
$13,951,687.00
13,962,765.546 USDC
0.0483%
14
LBank
BTC-USDC$0.9997
0.0000369 Btc
$13,859,403.00
511.822 BTC
0.0000%
15
BingX
BTC-USDC$0.9994
0.0000369 Btc
$13,223,848.00
490.576 BTC
0.0000%
16
Kraken
USDC-USDT$0.9999
0.0000369 Btc
$12,282,013.00
12,283,587.254 USDC
0.0425%
17
OKX
BTC-USDC$0.9994
0.0000369 Btc
$11,506,296.00
426.151 BTC
0.0000%
18
OKX
ETH-USDC$1.001
0.0000370 Btc
$10,380,282.00
5,502.401 ETH
0.0000%
19
Binance
BTC-USDC$0.9994
0.0000369 Btc
$9,573,628.00
353.617 BTC
0.0000%
20
LBank
USDC-USDT$1.00
0.0000369 Btc
$7,052,116.00
7,051,707.353 USDC
0.0244%
21
Bybit
XRP-USDC$1.00
0.0000369 Btc
$6,800,029.00
13,150,576.490 XRP
0.0455%
22
BingX
USDC-USDT$0.9994
0.0000369 Btc
$6,469,319.00
6,472,255.369 USDC
0.0224%
23
Bitget
BTC-USDC$0.9996
0.0000369 Btc
$6,422,180.00
238.132 BTC
0.0000%
24
Bitget
ETH-USDC$0.9996
0.0000369 Btc
$5,929,938.00
3,153.140 ETH
0.0000%
25
Binance
ETH-USDC$1.00
0.0000369 Btc
$5,494,157.00
2,904.051 ETH
0.0000%
26
KuCoin
BTC-USDC$0.9993
0.0000369 Btc
$5,308,476.00
196.135 BTC
0.0000%
27
BingX
ETH-USDC$0.9994
0.0000369 Btc
$5,171,283.00
2,780.063 ETH
0.0000%
28
Bitget
USDC-USDT$0.9998
0.0000369 Btc
$4,624,582.00
4,624,980.704 USDC
0.0160%
29
Gemini
USDC-USD$1.00
0.0000369 Btc
$4,226,608.00
4,225,889.435 USDC
0.0146%
30
OKX
USDC-USDT$1.001
0.0000370 Btc
$3,987,783.00
3,980,759.687 USDC
0.0138%
31
DigiFinex
USDC-USDT$1.00
0.0000369 Btc
$3,861,452.00
3,861,561.109 USDC
0.0134%
32
KuCoin
ETH-USDC$0.9996
0.0000369 Btc
$3,749,969.00
1,983.310 ETH
0.0000%
33
DigiFinex
BTC-USDC$0.9996
0.0000369 Btc
$3,481,048.00
128.601 BTC
0.0000%
34
Binance US
BTC-USDC$0.9993
0.0000369 Btc
$3,386,253.00
125.098 BTC
0.0000%
35
Uniswap V3 (Ethereum)
0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.9978
0.0000369 Btc
$3,272,226.00
121.799 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599
0.0000%
36
MEXC Global
USDC-USDT$0.9999
0.0000369 Btc
$2,671,635.00
2,671,977.730 USDC
0.0092%
37
Bybit
SOL-USDC$1.00
0.0000369 Btc
$2,310,033.00
109,491.964 SOL
0.0004%
38
Pancakeswap V3 (BSC)
0X55D398326F99059FF775485246999027B3197955-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$1.00
0.0000369 Btc
$2,050,776.00
2,050,005.819 0X55D398326F99059FF775485246999027B3197955
0.0071%
39
KuCoin
USDC-USDT$0.9999
0.0000369 Btc
$2,029,562.00
2,029,852.726 USDC
0.0070%
40
Bitstamp
USDC-EUR$1.00
0.0000369 Btc
$1,977,286.00
1,976,768.994 USDC
0.0068%
41
Huobi
USDC-USDT$1.001
0.0000370 Btc
$1,949,914.00
1,948,573.446 USDC
0.0067%
42
KuCoin
USDT-USDC$0.9996
0.0000369 Btc
$1,851,317.00
1,851,523.820 USDT
0.0064%
43
Kraken
BTC-USDC$0.9994
0.0000369 Btc
$1,818,764.00
67.229 BTC
0.0000%
44
DigiFinex
ETH-USDC$0.9996
0.0000369 Btc
$1,803,804.00
953.998 ETH
0.0000%
45
Kraken
ETH-USDC$0.9996
0.0000369 Btc
$1,654,156.00
874.464 ETH
0.0000%
46
Kraken
USDC-GBP$1.00
0.0000369 Btc
$1,408,372.00
1,408,001.571 USDC
0.0049%
47
OKX
XRP-USDC$0.9993
0.0000369 Btc
$1,327,427.00
2,581,813.205 XRP
0.0089%
48
OKX
USDT-USDC$0.9993
0.0000369 Btc
$1,299,847.00
1,300,382.011 USDT
0.0045%
49
Phemex
USDC-USDT$1.001
0.0000370 Btc
$1,131,818.00
1,130,842.850 USDC
0.0039%
50
KuCoin
XRP-USDC$0.9993
0.0000369 Btc
$1,097,541.00
2,122,284.391 XRP
0.0073%
51
Binance US
USDC-USD$0.9996
0.0000369 Btc
$1,065,954.00
1,066,380.852 USDC
0.0037%
52
Tidex
BTC-USDC$0.9997
0.0000369 Btc
$907,411.00
33.517 BTC
0.0000%
53
Bitget
XRP-USDC$0.9996
0.0000369 Btc
$899,841.00
1,754,388.000 XRP
0.0061%
54
OKX
LTC-USDC$0.9995
0.0000369 Btc
$872,263.00
9,191.769 LTC
0.0000%
55
BitMart
BTC-USDC$0.9996
0.0000369 Btc
$713,481.00
26.351 BTC
0.0000%
56
BitMart
ETH-USDC$0.9996
0.0000369 Btc
$696,548.00
368.297 ETH
0.0000%
57
Bitstamp
USDC-USD$1.00
0.0000369 Btc
$677,140.00
677,092.752 USDC
0.0023%
58
Bitget
MATIC-USDC$0.9996
0.0000369 Btc
$628,534.00
701,338.800 MATIC
0.0024%
59
Bitget
DOGE-USDC$0.9996
0.0000369 Btc
$559,157.00
7,778,914.196 DOGE
0.0269%
60
Bitget
ADA-USDC$0.9996
0.0000369 Btc
$534,820.00
1,443,268.000 ADA
0.0050%
61
QMall
BTC-USDC$0.9993
0.0000369 Btc
$498,458.00
18.502 BTC
0.0000%
62
Bitget
EOS-USDC$0.9996
0.0000369 Btc
$475,945.00
530,697.200 EOS
0.0018%
63
Bitget
TRX-USDC$0.9996
0.0000369 Btc
$463,043.00
6,117,004.600 TRX
0.0212%
64
Uniswap V3 (Ethereum)
0X853D955ACEF822DB058EB8505911ED77F175B99E-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$1.004
0.0000371 Btc
$459,533.00
457,739.740 0X853D955ACEF822DB058EB8505911ED77F175B99E
0.0016%
65
BitMart
USDC-USDT$0.9999
0.0000369 Btc
$456,635.00
456,660.100 USDC
0.0016%
66
Tidex
USDC-USDT$1.00
0.0000369 Btc
$395,695.00
395,712.117 USDC
0.0014%
67
Bitget
ATOM-USDC$0.9996
0.0000369 Btc
$385,326.00
36,859.790 ATOM
0.0001%
68
Bitget
AVAX-USDC$0.9994
0.0000369 Btc
$382,576.00
26,740.440 AVAX
0.0001%
69
BitMart
OP-USDC$0.9996
0.0000369 Btc
$368,962.00
257,320.800 OP
0.0009%
70
BitMart
DAI-USDC$0.9996
0.0000369 Btc
$333,867.00
334,026.200 DAI
0.0012%
71
Bitget
BCH-USDC$0.9996
0.0000369 Btc
$307,093.00
2,696.235 BCH
0.0000%
72
Kanga
BTC-USDC$0.9993
0.0000369 Btc
$269,384.00
0.000 BTC
0.0000%
73
MEXC Global
ETH-USDC$1.00
0.0000369 Btc
$269,274.00
142.330 ETH
0.0000%
74
Bitget
APE-USDC$0.9996
0.0000369 Btc
$267,055.00
86,224.840 APE
0.0003%
75
Bitfinex
UDC-USDT$0.9999
0.0000369 Btc
$244,894.00
244,925.050 UDC
0.0008%
76
MEXC Global
SHIB-USDC$1.00
0.0000369 Btc
$242,004.00
28,446,210,296.000 SHIB
98.4622%
77
Bitget
BNB-USDC$0.9996
0.0000369 Btc
$239,340.00
781.762 BNB
0.0000%
78
MEXC Global
BTC-USDC$1.00
0.0000369 Btc
$222,149.00
8.200 BTC
0.0000%
79
Coinbase Exchange
USDT-USDC$0.9996
0.0000369 Btc
$221,603.00
221,624.570 USDT
0.0008%
80
MEXC Global
XRP-USDC$1.00
0.0000369 Btc
$219,260.00
423,887.460 XRP
0.0015%
81
Bitget
LTC-USDC$0.9996
0.0000369 Btc
$217,459.00
2,300.464 LTC
0.0000%
82
Bitstamp
BTC-USDC$0.9994
0.0000369 Btc
$178,862.00
6.605 BTC
0.0000%
83
BitMart
LTC-USDC$0.9996
0.0000369 Btc
$175,607.00
1,862.794 LTC
0.0000%
84
BitMart
APE-USDC$0.9996
0.0000369 Btc
$162,201.00
51,364.400 APE
0.0002%
85
C-Patex
USDC-USDT$1.00
0.0000369 Btc
$160,723.00
160,727.110 USDC
0.0006%
86
CoinEx
USDC-USDT$1.00
0.0000369 Btc
$156,236.00
156,180.607 USDC
0.0005%
87
MEXC Global
EOS-USDC$1.00
0.0000369 Btc
$154,587.00
171,338.190 EOS
0.0006%
88
Coinfield
BTC-USDC$0.9997
0.0000369 Btc
$113,884.00
4.205 BTC
0.0000%
89
BitMart
DOGE-USDC$0.9996
0.0000369 Btc
$101,933.00
1,414,708.000 DOGE
0.0049%
90
Velodrome Finance
0X340FE1D898ECCAAD394E2BA0FC1F93D27C7B717A-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$0.9993
0.0000369 Btc
$95,084.00
90,425.108 0X340FE1D898ECCAAD394E2BA0FC1F93D27C7B717A
0.0003%
91
BitMart
FXS-USDC$0.9996
0.0000369 Btc
$94,655.00
14,243.800 FXS
0.0000%
92
BitMart
TRX-USDC$0.9996
0.0000369 Btc
$90,797.00
1,187,180.000 TRX
0.0041%
93
MEXC Global
BCH-USDC$1.00
0.0000369 Btc
$81,506.00
713.260 BCH
0.0000%
94
MEXC Global
ADA-USDC$1.00
0.0000369 Btc
$81,173.00
216,618.840 ADA
0.0007%
95
BitMart
MATIC-USDC$0.9996
0.0000369 Btc
$81,114.00
90,520.200 MATIC
0.0003%
96
Velodrome Finance
0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$1.001
0.0000370 Btc
$75,968.00
76,000.387 0X8C6F28F2F1A3C87F0F938B96D27520D9751EC8D9
0.0003%
97
BitMart
XLM-USDC$0.9996
0.0000369 Btc
$75,661.00
823,905.200 XLM
0.0029%
98
MEXC Global
ATOM-USDC$1.00
0.0000369 Btc
$63,635.00
6,016.600 ATOM
0.0000%
99
MEXC Global
FTM-USDC$1.00
0.0000369 Btc
$51,444.00
160,500.790 FTM
0.0006%
100
CoinJar Exchange
BTC-USDC$0.9993
0.0000369 Btc
$36,299.00
1.349 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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