ETH Price: $2,975.74 (+1.05%)
Gas: 7 Gwei

Token

Kyber Network Crystal v2 (KNC)
 

Overview

Max Total Supply

238,787,174.71732519522540654 KNC

Holders

17,382 ( 0.023%)

Market

Price

$0.58 @ 0.000195 ETH (+2.62%)

Onchain Market Cap

$138,272,101.39

Circulating Supply Market Cap

$98,492,064.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.008749488006 KNC

Value
$0.01 ( ~3.36050779945736E-06 Eth) [0.0000%]
0x2813fd17ea95b2655a7228383c5236e31090419e
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OVERVIEW

Kyber is a blockchain-based liquidity protocol that aggregates liquidity from a wide range of reserves, powering instant and secure token exchange in any decentralized application.

Market

Volume (24H):$11,446,430.00
Market Capitalization:$98,492,064.00
Circulating Supply:170,152,851.00 KNC
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
HTX
KNC-USDT$0.5783
0.0001942 Eth
$5,423,194.00
9,326,872.480 KNC
48.1571%
2
Bibox
KNC-USDT$0.5787
0.0001944 Eth
$1,748,558.00
3,021,387.000 KNC
15.6002%
3
Binance
KNC-USDT$0.58
0.0001948 Eth
$1,130,420.00
1,945,824.100 KNC
10.0468%
4
Upbit
KNC-KRW$0.6012
0.0002019 Eth
$828,585.00
1,378,168.483 KNC
7.1158%
5
BitMart
KNC-USDT$0.5785
0.0001943 Eth
$291,730.00
504,263.452 KNC
2.6036%
6
WhiteBIT
KNC-USDT$0.5789
0.0001944 Eth
$274,197.00
473,669.250 KNC
2.4457%
7
OKX
KNC-USDT$0.5796
0.0001946 Eth
$261,077.00
447,526.190 KNC
2.3107%
8
XT.COM
KNC-USDT$0.5793
0.0001946 Eth
$224,460.00
386,335.930 KNC
1.9948%
9
Websea
KNC-USDT$0.5791
0.0001945 Eth
$215,671.00
0.000 KNC
0.0000%
10
Phemex
KNC-USDT$0.5791
0.0001945 Eth
$197,474.00
340,982.090 KNC
1.7606%
11
LATOKEN
KNC-USDT$0.5795
0.0001947 Eth
$195,189.00
336,798.938 KNC
1.7390%
12
CoinW
KNC-USDT$0.5798
0.0001947 Eth
$188,451.00
325,008.796 KNC
1.6781%
13
HitBTC
KNC-USDT$0.5791
0.0001945 Eth
$175,082.00
301,849.500 KNC
1.5585%
14
FMFW.io
KNC-USDT$0.5791
0.0001945 Eth
$174,812.00
301,858.100 KNC
1.5586%
15
Bitrue
KNC-USDT$0.5791
0.0001946 Eth
$145,035.00
250,455.900 KNC
1.2932%
16
XT.COM
KNC-BTC$0.5794
0.0001946 Eth
$118,613.00
209,522.000 KNC
1.0818%
17
Coinbase Exchange
KNC-USD$0.5816
0.0001953 Eth
$99,386.00
170,884.300 KNC
0.8823%
18
Bitget
KNC-USDT$0.5787
0.0001943 Eth
$89,613.00
154,206.398 KNC
0.7962%
19
DigiFinex
KNC-USDT$0.5786
0.0001943 Eth
$75,649.00
130,749.300 KNC
0.6751%
20
Bithumb
KNC-KRW$0.6005
0.0002017 Eth
$63,549.00
105,829.702 KNC
0.5464%
21
BingX
KNC-USDT$0.5786
0.0001943 Eth
$55,755.00
95,890.123 KNC
0.4951%
22
Tidex
KNC-USDT$0.5798
0.0001947 Eth
$54,868.00
94,633.570 KNC
0.4886%
23
Bitunix
KNC-USDT$0.5785
0.0001947 Eth
$39,036.00
67,481.500 KNC
0.3484%
24
Biconomy
KNC-USDT$0.5789
0.0001944 Eth
$36,895.00
63,452.428 KNC
0.3276%
25
Binance
KNC-BTC$0.5798
0.0001947 Eth
$30,268.00
51,775.400 KNC
0.2673%
26
MEXC
KNC-USDT$0.5797
0.0001948 Eth
$29,448.00
50,799.500 KNC
0.2623%
27
Kraken
KNC-USD$0.5813
0.0001952 Eth
$27,612.00
47,504.492 KNC
0.2453%
28
Tapbit
KNC-USDT$0.5779
0.0001941 Eth
$19,580.33
33,633.600 KNC
0.1737%
29
Bitlo
KNC-TRY$0.5805
0.0001950 Eth
$17,727.68
30,374.780 KNC
0.1568%
30
KuCoin
KNC-USDT$0.5784
0.0001942 Eth
$15,711.06
27,163.995 KNC
0.1403%
31
Coinstore
KNC-USDT$0.5799
0.0001948 Eth
$15,627.41
26,893.510 KNC
0.1389%
32
CoinJar Exchange
KNC-USD$0.5648
0.0001888 Eth
$9,997.44
17,700.000 KNC
0.0914%
33
CoinJar Exchange
KNC-USDC$0.5631
0.0001874 Eth
$9,966.72
17,700.000 KNC
0.0914%
34
Gate.io
KNC-USDT$0.5797
0.0001947 Eth
$8,031.30
13,909.414 KNC
0.0718%
35
Bitkub
KNC-THB$0.5782
0.0001942 Eth
$7,894.91
13,653.586 KNC
0.0705%
36
Gate.io
KNC-ETH$0.5806
0.0001950 Eth
$7,470.70
12,880.330 KNC
0.0665%
37
Pionex
KNC-USDT$0.5787
0.0001944 Eth
$6,914.19
11,900.970 KNC
0.0614%
38
CoinEx
KNC-USDT$0.5805
0.0001950 Eth
$6,607.74
11,369.397 KNC
0.0587%
39
Kyberswap Elastic (Polygon)
0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$0.7087
0.0003431 Eth
$5,898.07
5.150 0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C
0.0000%
40
Tidex
KNC-BTC$0.5794
0.0001946 Eth
$5,733.09
9,894.450 KNC
0.0511%
41
BTSE
KNC-USDT$0.5809
0.0001951 Eth
$4,353.88
7,495.595 KNC
0.0387%
42
Bitvavo
KNC-EUR$0.5857
0.0001967 Eth
$4,252.94
7,261.564 KNC
0.0375%
43
Kraken
KNC-EUR$0.579
0.0001945 Eth
$3,116.19
5,381.730 KNC
0.0278%
44
Bit2Me
KNC-EUR$0.5792
0.0001945 Eth
$3,080.93
5,274.095 KNC
0.0272%
45
Bitfinex
KNC-USD$0.5797
0.0001947 Eth
$2,953.55
5,094.779 KNC
0.0263%
46
Currency.com
KNC-USD$0.5788
0.0001944 Eth
$2,496.91
4,314.000 KNC
0.0223%
47
Kyberswap Elastic (Polygon)
0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$0.7087
0.0003431 Eth
$2,360.96
3.776 0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C
0.0000%
48
TokoCrypto
KNC-USDT$0.5801
0.0001948 Eth
$2,147.63
3,702.266 KNC
0.0191%
49
Coins.ph
KNC-PHP$0.5847
0.0001964 Eth
$1,780.92
3,024.060 KNC
0.0156%
50
Crypto.com Exchange
KNC-USD$0.5785
0.0001943 Eth
$1,672.15
2,890.500 KNC
0.0149%
51
Currency.com
KNC-USDT$0.5786
0.0001943 Eth
$1,458.59
2,521.000 KNC
0.0130%
52
ZebPay
KNC-INR$0.6413
0.0002158 Eth
$1,413.01
2,203.286 KNC
0.0114%
53
KyberSwap Classic (Polygon)
0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$0.5864
0.0001970 Eth
$1,003.91
1,701.088 0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C
0.0088%
54
Binance US
KNC-USDT$0.5899
0.0001981 Eth
$901.14
1,527.546 KNC
0.0079%
55
Kyberswap Elastic (Arbitrum)
0X13AD51ED4F1B7E9DC168D8A00CB3F4DDD85EFA60-0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB$0.6875
0.0003326 Eth
$750.54
3.451 0X13AD51ED4F1B7E9DC168D8A00CB3F4DDD85EFA60
0.0000%
56
Uniswap V3 (Arbitrum One)
0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$0.5815
0.0001954 Eth
$680.50
1,182.191 0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB
0.0061%
57
Kyberswap Classic (Optimism)
0XA00E3A3511AAC35CA78530C85007AFCD31753819-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$0.5781
0.0001944 Eth
$669.74
1,175.006 0XA00E3A3511AAC35CA78530C85007AFCD31753819
0.0061%
58
Uniswap V3 (Optimism)
0XA00E3A3511AAC35CA78530C85007AFCD31753819-0X4200000000000000000000000000000000000006$0.5745
0.0001931 Eth
$666.81
1,174.027 0XA00E3A3511AAC35CA78530C85007AFCD31753819
0.0061%
59
CoinJar Exchange
KNC-AUD$0.5533
0.0001849 Eth
$663.98
1,200.000 KNC
0.0062%
60
Kyberswap Elastic (Polygon)
0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C-0XC3C7D422809852031B44AB29EEC9F1EFF2A58756$0.7087
0.0003431 Eth
$660.72
6.057 0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C
0.0000%
61
Mudrex
KNC-USDT$0.5786
0.0001943 Eth
$606.37
1,047.952 KNC
0.0054%
62
Kyberswap Classic (Arbitrum)
0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$0.58
0.0001952 Eth
$599.32
1,042.751 0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB
0.0054%
63
Uniswap V3 (Polygon)
0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$0.5861
0.0001969 Eth
$549.74
945.705 0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C
0.0049%
64
Kraken
KNC-ETH$0.5836
0.0001960 Eth
$479.78
822.112 KNC
0.0042%
65
Foxbit
KNC-BRL$0.5867
0.0001970 Eth
$450.18
766.757 KNC
0.0040%
66
Bitstamp
KNC-EUR$0.5797
0.0001947 Eth
$445.93
769.202 KNC
0.0040%
67
Nominex
KNC-USDT$0.5903
0.0001968 Eth
$408.94
692.738 KNC
0.0036%
68
Mercado Bitcoin
KNC-BRL$0.5534
0.0001856 Eth
$329.65
595.729 KNC
0.0031%
69
KuCoin
KNC-ETH$0.5791
0.0001945 Eth
$285.87
493.617 KNC
0.0025%
70
Uniswap V3 (Arbitrum One)
0X5979D7B546E38E414F7E9822514BE443A4800529-0XE4DDDFE67E7164B0FE14E218D80DC4C08EDC01CB$0.5818
0.0001954 Eth
$240.47
0.069 0X5979D7B546E38E414F7E9822514BE443A4800529
0.0000%
71
Uniswap V3 (Optimism)
0X1F32B1C2345538C0C6F582FCB022739C4A194EBB-0XA00E3A3511AAC35CA78530C85007AFCD31753819$0.5748
0.0001932 Eth
$199.38
0.057 0X1F32B1C2345538C0C6F582FCB022739C4A194EBB
0.0000%
72
KyberSwap Classic (Avalanche)
0X39FC9E94CAEACB435842FADEDECB783589F50F5F-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$0.6192
0.0002083 Eth
$141.56
223.197 0X39FC9E94CAEACB435842FADEDECB783589F50F5F
0.0012%
73
CoinJar Exchange
KNC-GBP$0.6048
0.0001876 Eth
$120.96
200.000 KNC
0.0010%
74
QMall
KNC-BTC$0.5795
0.0001946 Eth
$118.71
202.716 KNC
0.0010%
75
Uniswap V3 (Polygon)
0X03B54A6E9A984069379FAE1A4FC4DBAE93B3BCCD-0X1C954E8FE737F99F68FA1CCDA3E51EBDB291948C$0.5859
0.0001968 Eth
$104.78
0.030 0X03B54A6E9A984069379FAE1A4FC4DBAE93B3BCCD
0.0000%
76
KuCoin
KNC-BTC$0.5766
0.0001937 Eth
$98.40
170.651 KNC
0.0009%
77
WazirX
KNC-INR$0.6414
0.0002154 Eth
$90.05
140.400 KNC
0.0007%
78
WazirX
KNC-USDT$0.5561
0.0001864 Eth
$88.32
158.800 KNC
0.0008%
79
CoinDCX
KNC-INR$0.6094
0.0002046 Eth
$87.79
0.000 KNC
0.0000%
80
KyberSwap Classic (Avalanche)
0X2B2C81E08F1AF8835A78BB2A90AE924ACE0EA4BE-0X39FC9E94CAEACB435842FADEDECB783589F50F5F$0.6198
0.0002082 Eth
$66.69
1.741 0X2B2C81E08F1AF8835A78BB2A90AE924ACE0EA4BE
0.0000%
81
CEX.IO
KNC-USD$0.58
0.0001948 Eth
$63.03
108.738 KNC
0.0006%
82
Pancakeswap V3 (BSC)
0XFE56D5892BDFFC7BF58F2E84BE1B2C32D21C308B-0X2170ED0880AC9A755FD29B2688956BD959F933F8$0.5701
0.0001915 Eth
$50.17
87.177 0XFE56D5892BDFFC7BF58F2E84BE1B2C32D21C308B
0.0005%
83
CEX.IO
KNC-EUR$0.581
0.0001951 Eth
$40.47
69.950 KNC
0.0004%
84
Bitstamp
KNC-USD$0.5902
0.0001982 Eth
$36.04
61.052 KNC
0.0003%
85
Kyberswap Elastic (Optimism)
0X4200000000000000000000000000000000000042-0XA00E3A3511AAC35CA78530C85007AFCD31753819$0.571
0.0001921 Eth
$34.33
12.306 0X4200000000000000000000000000000000000042
0.0001%
86
CEX.IO
KNC-USDT$0.5798
0.0001947 Eth
$30.85
52.778 KNC
0.0003%
87
Balancer V2
0XDEFA4E8A7BCBA345F687A2F1456F5EDD9CE97202-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.5669
0.0001898 Eth
$29.61
52.220 0XDEFA4E8A7BCBA345F687A2F1456F5EDD9CE97202
0.0003%
88
TokoCrypto
KNC-BTC$0.5906
0.0001891 Eth
$29.53
50.000 KNC
0.0003%
89
HitBTC
KNC-BTC$0.5775
0.0001929 Eth
$17.15
29.700 KNC
0.0002%
90
FMFW.io
KNC-BTC$0.5774
0.0001930 Eth
$17.15
29.700 KNC
0.0002%
91
Coinone
KNC-KRW$0.6605
0.0002218 Eth
$14.19
21.488 KNC
0.0001%
92
Bittime
KNC-IDR$0.5828
0.0001957 Eth
$13.35
21.970 KNC
0.0001%
93
Indodax
KNC-IDR$0.5986
0.0002010 Eth
$8.69
14.523 KNC
0.0001%
94
Poloniex
KNC-BTC$0.5338
0.0001831 Eth
$1.068
2.000 KNC
0.0000%
95
NiceHash
KNC-BTC$0.5825
0.0001956 Eth
$0.9533
1.636 KNC
0.0000%
96
Poloniex
KNC-USDT$0.5302
0.0001774 Eth
$0.5302
0.997 KNC
0.0000%

Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xaC494b69...56048DD42
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
AdminUpgradeabilityProxy

Compiler Version
v0.6.8+commit.0bbfe453

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, Audited
File 1 of 4 : AdminUpgradeabilityProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import './UpgradeabilityProxy.sol';

/**
 * @title AdminUpgradeabilityProxy
 * @dev This contract combines an upgradeability proxy with an authorization
 * mechanism for administrative tasks.
 * All external functions in this contract must be guarded by the
 * `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
 * feature proposal that would enable this to be done automatically.
 */
contract AdminUpgradeabilityProxy is UpgradeabilityProxy {
  /**
   * Contract constructor.
   * @param _logic address of the initial implementation.
   * @param _admin Address of the proxy administrator.
   * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
   */
  constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
    assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
    _setAdmin(_admin);
  }

  /**
   * @dev Emitted when the administration has been transferred.
   * @param previousAdmin Address of the previous admin.
   * @param newAdmin Address of the new admin.
   */
  event AdminChanged(address previousAdmin, address newAdmin);

  /**
   * @dev Storage slot with the admin of the contract.
   * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
   * validated in the constructor.
   */

  bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

  /**
   * @dev Modifier to check whether the `msg.sender` is the admin.
   * If it is, it will run the function. Otherwise, it will delegate the call
   * to the implementation.
   */
  modifier ifAdmin() {
    if (msg.sender == _admin()) {
      _;
    } else {
      _fallback();
    }
  }

  /**
   * @return The address of the proxy admin.
   */
  function admin() external ifAdmin returns (address) {
    return _admin();
  }

  /**
   * @return The address of the implementation.
   */
  function implementation() external ifAdmin returns (address) {
    return _implementation();
  }

  /**
   * @dev Changes the admin of the proxy.
   * Only the current admin can call this function.
   * @param newAdmin Address to transfer proxy administration to.
   */
  function changeAdmin(address newAdmin) external ifAdmin {
    require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
    emit AdminChanged(_admin(), newAdmin);
    _setAdmin(newAdmin);
  }

  /**
   * @dev Upgrade the backing implementation of the proxy.
   * Only the admin can call this function.
   * @param newImplementation Address of the new implementation.
   */
  function upgradeTo(address newImplementation) external ifAdmin {
    _upgradeTo(newImplementation);
  }

  /**
   * @dev Upgrade the backing implementation of the proxy and call a function
   * on the new implementation.
   * This is useful to initialize the proxied contract.
   * @param newImplementation Address of the new implementation.
   * @param data Data to send as msg.data in the low level call.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   */
  function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
    _upgradeTo(newImplementation);
    (bool success,) = newImplementation.delegatecall(data);
    require(success);
  }

  /**
   * @return adm The admin slot.
   */
  function _admin() internal view returns (address adm) {
    bytes32 slot = ADMIN_SLOT;
    assembly {
      adm := sload(slot)
    }
  }

  /**
   * @dev Sets the address of the proxy admin.
   * @param newAdmin Address of the new proxy admin.
   */
  function _setAdmin(address newAdmin) internal {
    bytes32 slot = ADMIN_SLOT;

    assembly {
      sstore(slot, newAdmin)
    }
  }

  /**
   * @dev Only fall back when the sender is not the admin.
   */
  function _willFallback() internal override virtual {
    require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
    super._willFallback();
  }
}

File 2 of 4 : UpgradeabilityProxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import './Proxy.sol';
import '@openzeppelin/contracts/utils/Address.sol';

/**
 * @title UpgradeabilityProxy
 * @dev This contract implements a proxy that allows to change the
 * implementation address to which it will delegate.
 * Such a change is called an implementation upgrade.
 */
contract UpgradeabilityProxy is Proxy {
  /**
   * @dev Contract constructor.
   * @param _logic Address of the initial implementation.
   * @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
   * It should include the signature and the parameters of the function to be called, as described in
   * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
   * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
   */
  constructor(address _logic, bytes memory _data) public payable {
    assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
    _setImplementation(_logic);
    if(_data.length > 0) {
      (bool success,) = _logic.delegatecall(_data);
      require(success);
    }
  }  

  /**
   * @dev Emitted when the implementation is upgraded.
   * @param implementation Address of the new implementation.
   */
  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 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

  /**
   * @dev Returns the current implementation.
   * @return impl Address of the current implementation
   */
  function _implementation() internal override view returns (address impl) {
    bytes32 slot = IMPLEMENTATION_SLOT;
    assembly {
      impl := sload(slot)
    }
  }

  /**
   * @dev Upgrades the proxy to a new implementation.
   * @param newImplementation Address of the new implementation.
   */
  function _upgradeTo(address newImplementation) internal {
    _setImplementation(newImplementation);
    emit Upgraded(newImplementation);
  }

  /**
   * @dev Sets the implementation address of the proxy.
   * @param newImplementation Address of the new implementation.
   */
  function _setImplementation(address newImplementation) internal {
    require(Address.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");

    bytes32 slot = IMPLEMENTATION_SLOT;

    assembly {
      sstore(slot, newImplementation)
    }
  }
}

File 3 of 4 : Proxy.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @title Proxy
 * @dev Implements delegation of calls to other contracts, with proper
 * forwarding of return values and bubbling of failures.
 * It defines a fallback function that delegates all calls to the address
 * returned by the abstract _implementation() internal function.
 */
abstract contract Proxy {
  /**
   * @dev Fallback function.
   * Implemented entirely in `_fallback`.
   */
  fallback () payable external {
    _fallback();
  }

  /**
   * @dev Receive function.
   * Implemented entirely in `_fallback`.
   */
  receive () payable external {
    _fallback();
  }

  /**
   * @return The Address of the implementation.
   */
  function _implementation() internal virtual view returns (address);

  /**
   * @dev Delegates execution to an implementation contract.
   * This is a low level function that doesn't return to its internal call site.
   * It will return to the external caller whatever the implementation returns.
   * @param implementation Address to delegate.
   */
  function _delegate(address implementation) internal {
    assembly {
      // Copy msg.data. We take full control of memory in this inline assembly
      // block because it will not return to Solidity code. We overwrite the
      // Solidity scratch pad at memory position 0.
      calldatacopy(0, 0, calldatasize())

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

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

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

  /**
   * @dev Function that is run as the first thing in the fallback function.
   * Can be redefined in derived contracts to add functionality.
   * Redefinitions must call super._willFallback().
   */
  function _willFallback() internal virtual {
  }

  /**
   * @dev fallback implementation.
   * Extracted to enable manual triggering.
   */
  function _fallback() internal {
    _willFallback();
    _delegate(_implementation());
  }
}

File 4 of 4 : Address.sol
// 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);
    }

    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);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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":"","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":"","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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