Token USD Coin (Arb1)
Overview ERC20
Price
$1.00 @ 0.000630 ETH (+0.05%)
Fully Diluted Market Cap
Total Supply:
629,603,380.133438 USDC
Holders:
287,159 addresses
Contract:
Decimals:
6
Official Site:
Balance
18,555,382.620929 USDCValue
$18,555,382.62 ( ~11,693.7336 ETH) [2.9472%]
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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) | : | $3,144,720,874.00 |
Market Capitalization | : | $43,120,410,480.00 |
Circulating Supply | : | 43,098,530,425.00 USDC |
Market Data Source: Coinmarketcap |
Update? Click here to update the token ICO / general information
# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | ![]() | ETH-USDC | $0.9996 0.0000435 Btc | $474,879,549.00 299,776.596 ETH | 0.0022% |
2 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.004 0.0000437 Btc | $369,104,448.00 369,719,290.913 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 2.6657% |
3 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XDAC17F958D2EE523A2206206994597C13D831EC7 | $1.004 0.0000437 Btc | $196,725,462.00 195,874,031.136 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 1.4122% |
4 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $125,002,536.00 5,440.510 BTC | 0.0000% |
5 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.004 0.0000437 Btc | $102,052,483.00 104,849,638.890 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 0.7560% |
6 | ![]() | USDC-USDT | $0.9999 0.0000435 Btc | $92,215,939.00 92,221,270.382 USDC | 0.6649% |
7 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $80,252,425.00 3,492.319 BTC | 0.0000% |
8 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $64,859,638.00 40,976.226 ETH | 0.0003% |
9 | ![]() | 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8 | $1.00 0.0000435 Btc | $52,925,412.00 33,260.478 0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | 0.0002% |
10 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $41,970,103.00 1,827.479 BTC | 0.0000% |
11 | ![]() | ETH-USDC | $0.9996 0.0000435 Btc | $32,992,894.00 20,749.140 ETH | 0.0001% |
12 | ![]() | 0X4E71A2E537B7F9D9413D3991D37958C0B5E1E503-0X80B5A32E4F032B2A058B4F29EC95EEFEEB87ADCD | $0.9998 0.0000435 Btc | $31,085,718.00 30,094,773.140 0X4E71A2E537B7F9D9413D3991D37958C0B5E1E503 | 0.2170% |
13 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $29,236,199.00 1,266.911 BTC | 0.0000% |
14 | ![]() | LTC-USDC | $0.9996 0.0000435 Btc | $27,560,651.00 311,063.061 LTC | 0.0022% |
15 | ![]() | ETH-USDC | $0.9996 0.0000435 Btc | $25,782,237.00 16,198.032 ETH | 0.0001% |
16 | ![]() | USDC-USDT | $0.9996 0.0000435 Btc | $25,546,580.00 25,554,934.839 USDC | 0.1842% |
17 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $25,002,280.00 15,698.683 ETH | 0.0001% |
18 | ![]() | USDC-USDT | $0.9994 0.0000435 Btc | $23,760,065.00 23,774,576.390 USDC | 0.1714% |
19 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.004 0.0000437 Btc | $19,664,268.00 19,681,771.612 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 0.1419% |
20 | ![]() | USDC-USDT | $0.9999 0.0000435 Btc | $15,395,789.00 15,396,678.956 USDC | 0.1110% |
21 | ![]() | USDC-USD | $1.00 0.0000435 Btc | $13,978,755.00 13,978,755.096 USDC | 0.1008% |
22 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $13,235,094.00 573.321 BTC | 0.0000% |
23 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $13,062,924.00 565.850 BTC | 0.0000% |
24 | ![]() | USDC-USDT | $1.00 0.0000435 Btc | $12,648,140.00 12,648,671.147 USDC | 0.0912% |
25 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $11,456,532.00 7,200.042 ETH | 0.0001% |
26 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $10,623,281.00 460.353 BTC | 0.0000% |
27 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $10,578,170.00 460.072 BTC | 0.0000% |
28 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $9,282,570.00 5,856.510 ETH | 0.0000% |
29 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $8,476,435.00 368.500 BTC | 0.0000% |
30 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $7,978,521.00 346.821 BTC | 0.0000% |
31 | ![]() | USDC-EUR | $1.001 0.0000435 Btc | $7,316,211.00 7,311,854.026 USDC | 0.0527% |
32 | ![]() | 0X6B175474E89094C44DA98B954EEDEAC495271D0F-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $1.004 0.0000437 Btc | $7,288,377.00 7,257,847.570 0X6B175474E89094C44DA98B954EEDEAC495271D0F | 0.0523% |
33 | ![]() | USDC-USDT | $1.00 0.0000435 Btc | $6,890,928.00 6,888,628.610 USDC | 0.0497% |
34 | ![]() | 0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1 | $0.9996 0.0000435 Btc | $6,866,905.00 6,848,328.462 0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8 | 0.0494% |
35 | ![]() | USDC-USDT | $0.9997 0.0000435 Btc | $6,745,094.00 6,747,209.271 USDC | 0.0486% |
36 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $4,995,606.00 3,147.796 ETH | 0.0000% |
37 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $4,755,632.00 2,996.850 ETH | 0.0000% |
38 | ![]() | USDT-USDC | $1.00 0.0000435 Btc | $4,463,143.00 4,461,715.642 USDT | 0.0322% |
39 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.003 0.0000436 Btc | $4,384,564.00 4,394,800.081 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 0.0317% |
40 | ![]() | USDC-USDT | $0.9994 0.0000435 Btc | $4,323,930.00 4,325,469.609 USDC | 0.0312% |
41 | ![]() | 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $1.005 0.0000437 Btc | $3,461,129.00 3,460,682.482 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | 0.0250% |
42 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $3,337,881.00 145.201 BTC | 0.0000% |
43 | ![]() | USDC-USD | $1.00 0.0000435 Btc | $3,130,825.00 3,130,887.262 USDC | 0.0226% |
44 | ![]() | USDC-USDT | $0.9997 0.0000435 Btc | $2,996,964.00 2,997,894.140 USDC | 0.0216% |
45 | ![]() | USDC-USDT | $0.9999 0.0000435 Btc | $2,846,867.00 2,847,154.659 USDC | 0.0205% |
46 | ![]() | USDC-GBP | $1.00 0.0000435 Btc | $2,681,356.00 2,680,638.265 USDC | 0.0193% |
47 | ![]() | DOGE-USDC | $1.00 0.0000435 Btc | $2,530,115.00 28,167,368.500 DOGE | 0.2031% |
48 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $2,028,769.00 88.212 BTC | 0.0000% |
49 | ![]() | USDC-USDT | $0.9997 0.0000435 Btc | $2,001,384.00 2,001,991.980 USDC | 0.0144% |
50 | ![]() | BTC-USDC | $0.9996 0.0000435 Btc | $1,821,100.00 79.250 BTC | 0.0000% |
51 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $1,807,408.00 78.340 BTC | 0.0000% |
52 | ![]() | 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $1.005 0.0000437 Btc | $1,758,559.00 75.872 0X2260FAC5E5542A773AA44FBCFEDF7C193BC2C599 | 0.0000% |
53 | ![]() | ETH-USDC | $0.9996 0.0000435 Btc | $1,554,948.00 983.162 ETH | 0.0000% |
54 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $1,067,709.00 46.381 BTC | 0.0000% |
55 | ![]() | ETH-USDC | $1.00 0.0000435 Btc | $999,680.00 627.241 ETH | 0.0000% |
56 | ![]() | AVAX-USDC | $1.00 0.0000435 Btc | $897,534.00 44,124.030 AVAX | 0.0003% |
57 | ![]() | DOGE-USDC | $1.00 0.0000435 Btc | $855,874.00 9,677,328.299 DOGE | 0.0698% |
58 | ![]() | EOS-USDC | $0.9996 0.0000435 Btc | $853,099.00 778,997.400 EOS | 0.0056% |
59 | ![]() | DOGE-USDC | $0.9996 0.0000435 Btc | $793,614.00 8,893,986.000 DOGE | 0.0641% |
60 | ![]() | USDC-USD | $0.9998 0.0000435 Btc | $687,406.00 687,543.613 USDC | 0.0050% |
61 | ![]() | MATIC-USDC | $1.00 0.0000435 Btc | $656,035.00 579,502.920 MATIC | 0.0042% |
62 | ![]() | MATIC-USDC | $1.00 0.0000435 Btc | $630,783.00 553,389.406 MATIC | 0.0040% |
63 | ![]() | ATOM-USDC | $0.9996 0.0000435 Btc | $573,476.00 42,304.600 ATOM | 0.0003% |
64 | ![]() | BCH-USDC | $1.00 0.0000435 Btc | $559,079.00 4,182.290 BCH | 0.0000% |
65 | ![]() | USDT-USDC | $1.00 0.0000435 Btc | $508,647.00 508,516.730 USDT | 0.0037% |
66 | ![]() | USDC-USDT | $0.9996 0.0000435 Btc | $494,799.00 494,973.680 USDC | 0.0036% |
67 | ![]() | ADA-USDC | $1.00 0.0000435 Btc | $410,802.00 1,062,823.750 ADA | 0.0077% |
68 | ![]() | EOS-USDC | $1.00 0.0000435 Btc | $389,432.00 355,852.570 EOS | 0.0026% |
69 | ![]() | BCH-USDC | $1.00 0.0000435 Btc | $389,410.00 2,888.119 BCH | 0.0000% |
70 | ![]() | NEAR-USDC | $0.9996 0.0000435 Btc | $388,438.00 160,165.930 NEAR | 0.0012% |
71 | ![]() | USDC-USDT | $0.9974 0.0000434 Btc | $388,321.00 389,335.940 USDC | 0.0028% |
72 | ![]() | SOL-USDC | $1.00 0.0000435 Btc | $356,712.00 14,650.690 SOL | 0.0001% |
73 | ![]() | ALGO-USDC | $1.00 0.0000435 Btc | $344,476.00 1,345,005.680 ALGO | 0.0097% |
74 | ![]() | UNI-USDC | $1.00 0.0000435 Btc | $314,948.00 46,398.431 UNI | 0.0003% |
75 | ![]() | OP-USDC | $1.00 0.0000435 Btc | $284,084.00 129,758.620 OP | 0.0009% |
76 | ![]() | XRP-USDC | $1.00 0.0000435 Btc | $278,104.00 677,090.130 XRP | 0.0049% |
77 | ![]() | BTC-USDC | $1.00 0.0000435 Btc | $268,994.00 11.683 BTC | 0.0000% |
78 | ![]() | USDC-GBP | $1.001 0.0000435 Btc | $267,588.00 267,450.350 USDC | 0.0019% |
79 | ![]() | USDC-USDT | $0.9996 0.0000435 Btc | $250,227.00 250,327.770 USDC | 0.0018% |
80 | ![]() | USDC-USDT | $0.9996 0.0000435 Btc | $245,408.00 245,507.076 USDC | 0.0018% |
81 | ![]() | USDC-EUR | $1.001 0.0000435 Btc | $245,083.00 244,851.998 USDC | 0.0018% |
82 | ![]() | BNB-USDC | $1.00 0.0000435 Btc | $233,455.00 760.400 BNB | 0.0000% |
83 | ![]() | USDC-USDT | $1.001 0.0000435 Btc | $230,326.00 229,936.614 USDC | 0.0017% |
84 | ![]() | USDC-USD | $1.00 0.0000435 Btc | $230,195.00 230,197.247 USDC | 0.0017% |
85 | ![]() | USDC-EUR | $1.00 0.0000435 Btc | $227,611.00 227,549.910 USDC | 0.0016% |
86 | ![]() | AAVE-USDC | $1.00 0.0000435 Btc | $225,021.00 2,584.707 AAVE | 0.0000% |
87 | ![]() | 0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D-BUSD | $1.002 0.0000436 Btc | $208,499.00 208,423.086 0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D | 0.0015% |
88 | ![]() | ETH-USDC | $0.9996 0.0000435 Btc | $203,317.00 130.333 ETH | 0.0000% |
89 | ![]() | ADA-USDC | $1.00 0.0000435 Btc | $187,038.00 485,623.000 ADA | 0.0035% |
90 | ![]() | TRX-USDC | $1.00 0.0000435 Btc | $183,706.00 2,908,822.199 TRX | 0.0210% |
91 | ![]() | DAI-USDC | $1.00 0.0000435 Btc | $167,656.00 167,698.400 DAI | 0.0012% |
92 | ![]() | LTC-USDC | $1.00 0.0000435 Btc | $156,789.00 1,768.150 LTC | 0.0000% |
93 | ![]() | SHIB-USDC | $1.00 0.0000435 Btc | $153,984.00 12,836,726,779.000 SHIB | 92.5520% |
94 | ![]() | USDC-USDT | $0.9996 0.0000435 Btc | $143,276.00 143,333.793 USDC | 0.0010% |
95 | ![]() | UDC-USDT | $0.9999 0.0000435 Btc | $112,959.00 112,971.973 UDC | 0.0008% |
96 | ![]() | BUSD-USDC | $0.9996 0.0000435 Btc | $109,291.00 109,358.381 BUSD | 0.0008% |
97 | ![]() | TRX-USDC | $1.00 0.0000435 Btc | $99,101.00 1,570,075.400 TRX | 0.0113% |
98 | ![]() | WBTC-USDC | $1.00 0.0000435 Btc | $94,611.00 4.124 WBTC | 0.0000% |
99 | ![]() | DOGE-USDC | $1.00 0.0000435 Btc | $89,593.00 1,020,473.232 DOGE | 0.0074% |
100 | ![]() | USDC-USDT | $1.00 0.0000435 Btc | $51,185.00 51,169.177 USDC | 0.0004% |
Contract Name:
TransparentUpgradeableProxy
Compiler Version
v0.6.12+commit.27d51765
Contract Source Code (Solidity)
/** *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
- No Contract Security Audit Submitted- Submit Audit Here
[{"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"}]
Contract Creation Code
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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---------------