Token Bridged USDC

 

Overview ERC20

Price
$1.00 @ 0.000266 ETH
Fully Diluted Market Cap
Total Supply:
310,867,695.381593 USDC.e

Holders:
728,776 addresses
Balance
2.475716 USDC.e

Value
$2.47 ( ~0.000657149993448299 ETH) [0.0000%]
0x64023decf09f20ba403305f5a2946b5b33d1933b
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OVERVIEW

This is a bridged USDC token deployed by Arbitrum Foundation.

Market

Volume (24H):$9,021,362,657.00
Market Capitalization:$33,058,645,661.00
Circulating Supply:33,055,649,400.00 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
0.0000143 Btc
$1,322,236,812.00
1,322,191,031.000 USDC
63.2540%
2
Bybit
ETH-USDC$0.9999
0.0000143 Btc
$547,942,142.00
145,712.842 ETH
0.0070%
3
Bybit
BTC-USDC$0.9999
0.0000143 Btc
$412,195,278.00
5,863.015 BTC
0.0003%
4
LBank
ETH-USDC$0.9999
0.0000143 Btc
$257,596,084.00
68,532.258 ETH
0.0033%
5
LBank
BTC-USDC$0.9999
0.0000143 Btc
$241,019,464.00
3,454.125 BTC
0.0002%
6
Bybit
USDC-USDT$1.00
0.0000143 Btc
$191,085,490.00
191,079,774.370 USDC
9.1413%
7
OKX
ETH-USDC$0.9999
0.0000143 Btc
$143,095,766.00
38,052.977 ETH
0.0018%
8
Bitrue
ETH-USDC$1.00
0.0000143 Btc
$132,634,683.00
35,249.153 ETH
0.0017%
9
Hotcoin
ETH-USDC$1.00
0.0000143 Btc
$132,180,713.00
35,135.975 ETH
0.0017%
10
Tapbit
BTC-USDC$1.00
0.0000143 Btc
$116,290,011.00
1,653.032 BTC
0.0001%
11
DigiFinex
USDC-USDT$1.00
0.0000143 Btc
$116,147,934.00
116,151,407.000 USDC
5.5567%
12
Tapbit
ETH-USDC$1.00
0.0000143 Btc
$113,771,349.00
30,251.911 ETH
0.0014%
13
Bitrue
BTC-USDC$1.00
0.0000143 Btc
$110,002,632.00
1,575.380 BTC
0.0001%
14
OKX
BTC-USDC$1.00
0.0000143 Btc
$87,264,799.00
1,241.919 BTC
0.0001%
15
Binance
BTC-USDC$0.9999
0.0000143 Btc
$81,917,668.00
1,165.567 BTC
0.0001%
16
Binance
ETH-USDC$1.00
0.0000143 Btc
$74,496,442.00
19,833.456 ETH
0.0009%
17
LATOKEN
USDC-USDT$1.00
0.0000143 Btc
$70,986,261.00
70,987,609.478 USDC
3.3961%
18
Deepcoin
USDC-USDT$0.9999
0.0000143 Btc
$51,659,428.00
53,586,829.052 USDC
2.5636%
19
DigiFinex
BTC-USDC$1.00
0.0000143 Btc
$44,262,646.00
634.164 BTC
0.0000%
20
OKX
USDC-USDT$1.00
0.0000143 Btc
$40,054,123.00
40,054,875.515 USDC
1.9162%
21
DigiFinex
ETH-USDC$1.00
0.0000143 Btc
$37,934,074.00
10,082.105 ETH
0.0005%
22
Biconomy
ETH-USDC$1.00
0.0000143 Btc
$31,343,660.00
8,348.678 ETH
0.0004%
23
Kraken
USDC-USD$0.9999
0.0000143 Btc
$25,925,476.00
25,928,069.001 USDC
1.2404%
24
Coinbase Exchange
USDT-USDC$1.00
0.0000143 Btc
$25,500,700.00
25,506,638.180 USDT
1.2202%
25
HitBTC
BTC-USDC$1.00
0.0000143 Btc
$25,336,617.00
360.660 BTC
0.0000%
26
FMFW.io
BTC-USDC$1.00
0.0000143 Btc
$25,174,305.00
360.660 BTC
0.0000%
27
Kraken
USDC-EUR$0.999
0.0000143 Btc
$22,553,535.00
22,575,983.562 USDC
1.0800%
28
Bit2Me
USDC-EUR$0.999
0.0000143 Btc
$22,077,731.00
22,123,745.184 USDC
1.0584%
29
BingX
USDC-USDT$0.9999
0.0000143 Btc
$20,859,772.00
20,859,529.163 USDC
0.9979%
30
FMFW.io
ETH-USDC$1.00
0.0000143 Btc
$18,391,517.00
4,886.506 ETH
0.0002%
31
HitBTC
ETH-USDC$0.9999
0.0000143 Btc
$18,352,024.00
4,891.451 ETH
0.0002%
32
Binance
SOL-USDC$1.00
0.0000143 Btc
$17,170,528.00
95,879.121 SOL
0.0046%
33
BingX
ETH-USDC$0.9999
0.0000143 Btc
$14,403,697.00
3,830.928 ETH
0.0002%
34
Bitrue
USDC-USDT$0.9999
0.0000143 Btc
$13,099,553.00
13,100,838.770 USDC
0.6267%
35
Kraken
USDC-USDT$0.9999
0.0000143 Btc
$11,168,001.00
11,169,163.100 USDC
0.5343%
36
Bybit
SOL-USDC$0.9999
0.0000143 Btc
$11,007,330.00
61,424.370 SOL
0.0029%
37
Bit2Me
USDC-USDT$0.9999
0.0000143 Btc
$10,924,591.00
10,926,209.688 USDC
0.5227%
38
OKX
SOL-USDC$0.9999
0.0000143 Btc
$10,769,603.00
60,151.267 SOL
0.0029%
39
FMFW.io
USDT-USDC$1.00
0.0000143 Btc
$9,323,555.00
9,325,822.000 USDT
0.4461%
40
HitBTC
USDT-USDC$0.9999
0.0000143 Btc
$9,323,493.00
9,325,725.000 USDT
0.4461%
41
Hotcoin
USDC-USDT$0.9999
0.0000143 Btc
$8,850,982.00
8,852,034.000 USDC
0.4235%
42
OKX
USDT-USDC$0.9999
0.0000143 Btc
$8,785,621.00
8,786,687.911 USDT
0.4204%
43
Bitget
USDC-USDT$1.00
0.0000143 Btc
$8,755,644.00
8,755,477.064 USDC
0.4189%
44
BingX
BTC-USDC$0.9999
0.0000143 Btc
$8,734,681.00
124.255 BTC
0.0000%
45
Vertex (Spot)
WBTC-USDC$0.9999
0.0000143 Btc
$8,152,240.00
115.535 WBTC
0.0000%
46
Backpack Exchange
SOL-USDC$1.001
0.0000143 Btc
$7,816,520.00
43,685.020 SOL
0.0021%
47
HTX
USDC-USDT$0.9998
0.0000143 Btc
$7,413,364.00
7,413,676.289 USDC
0.3547%
48
MEXC
USDC-USDT$0.9999
0.0000143 Btc
$7,280,298.00
7,281,012.700 USDC
0.3483%
49
KuCoin
ETH-USDC$0.9999
0.0000143 Btc
$7,018,012.00
1,865.487 ETH
0.0001%
50
Kraken
BTC-USDC$1.00
0.0000143 Btc
$6,926,657.00
99.220 BTC
0.0000%
51
Phemex
USDC-USDT$1.00
0.0000143 Btc
$6,595,668.00
6,594,963.150 USDC
0.3155%
52
Coinbase Exchange
USDC-EUR$0.999
0.0000143 Btc
$6,563,379.00
6,569,911.520 USDC
0.3143%
53
XT.COM
USDC-USDT$1.00
0.0000143 Btc
$6,350,173.00
6,349,848.810 USDC
0.3038%
54
Pionex
USDC-USDT$0.9999
0.0000143 Btc
$5,559,005.00
5,559,083.360 USDC
0.2659%
55
Kraken
ETH-USDC$0.9999
0.0000143 Btc
$5,062,657.00
1,345.626 ETH
0.0001%
56
KuCoin
USDC-USDT$0.9999
0.0000143 Btc
$4,950,825.00
4,951,340.125 USDC
0.2369%
57
Bitget
ETH-USDC$0.9999
0.0000143 Btc
$4,836,776.00
1,288.149 ETH
0.0001%
58
Cryptology
BTC-USDC$1.00
0.0000143 Btc
$4,471,596.00
64.039 BTC
0.0000%
59
Vertex (Spot)
WETH-USDC$1.00
0.0000143 Btc
$4,319,487.00
1,150.330 WETH
0.0001%
60
PointPay
BTC-USDC$1.00
0.0000143 Btc
$4,297,580.00
61.161 BTC
0.0000%
61
Bitget
BTC-USDC$0.9999
0.0000143 Btc
$3,936,547.00
56.035 BTC
0.0000%
62
KuCoin
BTC-USDC$0.9999
0.0000143 Btc
$3,414,351.00
48.929 BTC
0.0000%
63
Gate.io
USDC-USDT$0.9999
0.0000143 Btc
$3,323,366.00
3,323,388.503 USDC
0.1590%
64
Coinbase Exchange
USDC-GBP$0.9993
0.0000143 Btc
$3,321,874.00
3,324,093.520 USDC
0.1590%
65
Bitstamp
USDC-USD$1.00
0.0000143 Btc
$3,184,702.00
3,184,574.958 USDC
0.1524%
66
PointPay
DOGE-USDC$1.00
0.0000143 Btc
$3,115,997.00
18,482,276.087 DOGE
0.8842%
67
Tapbit
USDC-USDT$0.9998
0.0000143 Btc
$3,106,116.00
3,106,587.562 USDC
0.1486%
68
Cube
BTC-USDC$1.00
0.0000143 Btc
$2,312,424.00
33.076 BTC
0.0000%
69
Gemini
USDC-USD$1.00
0.0000143 Btc
$1,887,041.00
1,886,493.994 USDC
0.0903%
70
C-Patex
USDC-USDT$1.00
0.0000143 Btc
$1,870,452.00
1,870,501.494 USDC
0.0895%
71
PointPay
ETH-USDC$1.001
0.0000143 Btc
$1,812,475.00
482.030 ETH
0.0000%
72
KuCoin
USDT-USDC$0.9999
0.0000143 Btc
$1,603,858.00
1,604,161.551 USDT
0.0767%
73
BitMart
USDC-USDT$0.9999
0.0000143 Btc
$1,570,019.00
1,570,107.600 USDC
0.0751%
74
Dexalot
USDT-USDC$1.00
0.0000143 Btc
$1,552,263.00
1,552,615.864 USDT
0.0743%
75
Maverick Protocol
0X40D16FC0246AD3160CCC09B8D0D3A2CD28AE6C2F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$1.00
0.0000143 Btc
$1,435,475.00
1,435,136.212 0X40D16FC0246AD3160CCC09B8D0D3A2CD28AE6C2F
0.0687%
76
VALR
USDT-USDC$1.00
0.0000143 Btc
$1,172,962.00
1,172,342.370 USDT
0.0561%
77
BYDFi
USDC-USDT$1.00
0.0000143 Btc
$1,097,659.00
1,097,703.540 USDC
0.0525%
78
WhiteBIT
USDC-USDT$1.00
0.0000143 Btc
$1,059,211.00
1,059,125.436 USDC
0.0507%
79
Deribit Spot
USDC-USDT$0.9999
0.0000143 Btc
$1,032,440.00
1,032,475.000 USDC
0.0494%
80
MEXC
ETH-USDC$1.00
0.0000143 Btc
$1,025,467.00
272.523 ETH
0.0000%
81
Dexalot
BTC-USDC$0.9998
0.0000143 Btc
$970,311.00
13.715 BTC
0.0000%
82
PointPay
AVAX-USDC$1.00
0.0000143 Btc
$969,085.00
23,755.987 AVAX
0.0011%
83
Backpack Exchange
BTC-USDC$1.001
0.0000143 Btc
$899,244.00
12.757 BTC
0.0000%
84
Toobit
USDC-USDT$0.9999
0.0000143 Btc
$868,095.00
868,088.000 USDC
0.0415%
85
PointPay
FIL-USDC$1.00
0.0000143 Btc
$846,145.00
136,734.012 FIL
0.0065%
86
Maverick Protocol
0X40D16FC0246AD3160CCC09B8D0D3A2CD28AE6C2F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$1.00
0.0000143 Btc
$786,891.00
786,832.728 0X40D16FC0246AD3160CCC09B8D0D3A2CD28AE6C2F
0.0376%
87
PointPay
FTM-USDC$1.00
0.0000143 Btc
$754,513.00
850,171.486 FTM
0.0407%
88
Backpack Exchange
ETH-USDC$1.001
0.0000143 Btc
$710,144.00
188.376 ETH
0.0000%
89
MEXC
BTC-USDC$1.00
0.0000143 Btc
$666,223.00
9.544 BTC
0.0000%
90
Binance US
USDC-USDT$0.9995
0.0000143 Btc
$652,428.00
652,766.899 USDC
0.0312%
91
WOO X
USDC-USDT$1.00
0.0000143 Btc
$597,104.00
597,047.110 USDC
0.0286%
92
PointPay
XRP-USDC$1.00
0.0000143 Btc
$411,808.00
760,756.054 XRP
0.0364%
93
PointPay
UNI-USDC$1.00
0.0000143 Btc
$406,913.00
42,987.889 UNI
0.0021%
94
PointPay
TRX-USDC$1.00
0.0000143 Btc
$342,164.00
2,767,553.029 TRX
0.1324%
95
PointPay
ATOM-USDC$1.00
0.0000143 Btc
$299,556.00
33,999.179 ATOM
0.0016%
96
CoinEx
USDC-USDT$0.9989
0.0000143 Btc
$272,087.00
272,367.297 USDC
0.0130%
97
Slex
BTC-USDC$0.9999
0.0000143 Btc
$235,057.00
3.345 BTC
0.0000%
98
HashKey Exchange
ETH-USDC$1.00
0.0000143 Btc
$127,495.00
34.133 ETH
0.0000%
99
Backpack Exchange
USDT-USDC$1.001
0.0000143 Btc
$98,120.00
98,084.000 USDT
0.0047%
100
HashKey Exchange
BTC-USDC$1.00
0.0000143 Btc
$91,795.00
1.305 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 Arbiscan.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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Deployed Bytecode

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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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