Feature Tip: Add private address tag to any address under My Name Tag !
Overview
Max Total Supply
1,000,000,000 YGG
Holders
23,472 ( 0.017%)
Market
Price
$0.69 @ 0.000190 ETH (+7.31%)
Onchain Market Cap
$694,085,000.00
Circulating Supply Market Cap
$267,450,453.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.00000052358987713 YGGValue
$0.00 ( ~0 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | BTCC | YGG-USDT | $0.6965 0.0001911 Eth | $31,399,888.00 46,561,001.100 YGG | 23.8646% |
2 | Binance | YGG-USDT | $0.6955 0.0001906 Eth | $19,057,891.00 28,220,921.200 YGG | 14.4645% |
3 | Websea | YGG-USDT | $0.698 0.0001914 Eth | $9,950,081.00 0.000 YGG | 0.0000% |
4 | Nami.Exchange | YGG-VNST | $0.6973 0.0001914 Eth | $9,301,710.00 13,339,308.100 YGG | 6.8370% |
5 | OKX | YGG-USDT | $0.6946 0.0001903 Eth | $9,251,361.00 13,706,600.991 YGG | 7.0253% |
6 | Nami.Exchange | YGG-USDT | $0.6986 0.0001915 Eth | $9,248,222.00 13,237,602.600 YGG | 6.7849% |
7 | Gate.io | YGG-USDT | $0.6955 0.0001906 Eth | $8,507,097.00 12,625,140.900 YGG | 6.4710% |
8 | WhiteBIT | YGG-USDT | $0.6975 0.0001911 Eth | $5,134,120.00 7,361,023.207 YGG | 3.7729% |
9 | DigiFinex | YGG-USDT | $0.6964 0.0001908 Eth | $4,735,360.00 6,799,748.200 YGG | 3.4852% |
10 | BTSE | YGG-USDT | $0.6954 0.0001906 Eth | $4,716,793.00 6,782,605.245 YGG | 3.4764% |
11 | HTX | YGG-USDT | $0.6957 0.0001907 Eth | $4,092,977.00 6,077,025.847 YGG | 3.1148% |
12 | Bitunix | YGG-USDT | $0.7003 0.0001924 Eth | $3,527,015.00 5,036,929.500 YGG | 2.5817% |
13 | Bitget | YGG-USDT | $0.6967 0.0001909 Eth | $2,232,102.00 3,316,358.245 YGG | 1.6998% |
14 | Phemex | YGG-USDT | $0.6955 0.0001907 Eth | $2,147,008.00 3,087,061.730 YGG | 1.5823% |
15 | Bibox | YGG-USDT | $0.6895 0.0001890 Eth | $1,901,700.00 2,758,161.000 YGG | 1.4137% |
16 | Ourbit | YGG-USDT | $0.6989 0.0001917 Eth | $1,795,661.00 2,660,588.720 YGG | 1.3637% |
17 | Bitrue | YGG-USDT | $0.6959 0.0001907 Eth | $1,772,196.00 2,546,728.470 YGG | 1.3053% |
18 | Hotcoin | YGG-USDT | $0.6956 0.0001907 Eth | $1,680,886.00 2,416,342.700 YGG | 1.2385% |
19 | Biconomy.com | YGG-USDT | $0.6962 0.0001908 Eth | $1,531,360.00 2,271,353.300 YGG | 1.1642% |
20 | Koinpark | YGG-USDT | $0.6968 0.0001912 Eth | $1,048,425.00 1,504,522.017 YGG | 0.7711% |
21 | BYDFi | YGG-USDT | $0.6998 0.0001921 Eth | $851,049.00 1,216,107.500 YGG | 0.6233% |
22 | LBank | YGG-USDT | $0.6967 0.0001911 Eth | $845,050.00 1,212,981.250 YGG | 0.6217% |
23 | Binance | YGG-BTC | $0.6957 0.0001908 Eth | $730,498.00 1,086,392.000 YGG | 0.5568% |
24 | Hibt | YGG-USDT | $0.697 0.0001910 Eth | $621,011.00 920,124.376 YGG | 0.4716% |
25 | CoinCatch | YGG-USDT | $0.6998 0.0001921 Eth | $564,851.00 837,331.612 YGG | 0.4292% |
26 | OrangeX | YGG-USDT | $0.6968 0.0001910 Eth | $545,342.00 808,543.200 YGG | 0.4144% |
27 | Bithumb | YGG-KRW | $0.6922 0.0001897 Eth | $507,436.00 733,060.895 YGG | 0.3757% |
28 | KuCoin | YGG-USDT | $0.695 0.0001904 Eth | $462,417.00 665,347.014 YGG | 0.3410% |
29 | BingX | YGG-USDT | $0.6975 0.0001911 Eth | $392,841.00 581,696.314 YGG | 0.2981% |
30 | FameEX | YGG-USDT | $0.6965 0.0001911 Eth | $379,183.00 561,902.600 YGG | 0.2880% |
31 | XT.COM | YGG-USDT | $0.695 0.0001906 Eth | $373,264.00 553,710.900 YGG | 0.2838% |
32 | PointPay | YGG-USDT | $0.6973 0.0001911 Eth | $310,983.00 460,234.165 YGG | 0.2359% |
33 | Binance | YGG-TRY | $0.6963 0.0001910 Eth | $306,687.00 453,929.300 YGG | 0.2327% |
34 | CoinTR | YGG-USDT | $0.6972 0.0001910 Eth | $282,903.00 420,225.600 YGG | 0.2154% |
35 | MEXC | YGG-USDT | $0.6968 0.0001910 Eth | $275,805.00 395,821.980 YGG | 0.2029% |
36 | Upbit | YGG-BTC | $0.6968 0.0001909 Eth | $264,553.00 379,651.357 YGG | 0.1946% |
37 | BVOX | YGG-USDT | $0.6956 0.0001906 Eth | $255,750.00 379,349.500 YGG | 0.1944% |
38 | Upbit Indonesia | YGG-BTC | $0.6941 0.0001904 Eth | $233,614.00 336,550.044 YGG | 0.1725% |
39 | Koinpark | YGG-INR | $0.7074 0.0001943 Eth | $208,151.00 294,239.686 YGG | 0.1508% |
40 | Toobit | YGG-USDT | $0.6962 0.0001909 Eth | $171,247.00 253,573.600 YGG | 0.1300% |
41 | Pionex | YGG-USDT | $0.6954 0.0001907 Eth | $144,347.00 213,756.363 YGG | 0.1096% |
42 | Binance | YGG-USDC | $0.6954 0.0001908 Eth | $135,225.00 199,685.400 YGG | 0.1023% |
43 | Bitvavo | YGG-EUR | $0.6993 0.0001920 Eth | $130,615.00 186,771.749 YGG | 0.0957% |
44 | CoinW | YGG-USDT | $0.7003 0.0001924 Eth | $128,351.00 183,271.974 YGG | 0.0939% |
45 | BitMart | YGG-USDT | $0.6998 0.0001919 Eth | $118,551.00 169,407.872 YGG | 0.0868% |
46 | LATOKEN | YGG-USDT | $0.6953 0.0001906 Eth | $118,447.00 170,353.213 YGG | 0.0873% |
47 | OKX | YGG-USDC | $0.6963 0.0001908 Eth | $98,457.00 145,056.638 YGG | 0.0743% |
48 | DeGate | 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $0.6999 0.0001922 Eth | $91,754.00 136,236.550 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | 0.0698% |
49 | CoinEx | YGG-USDT | $0.6948 0.0001905 Eth | $78,946.00 116,790.372 YGG | 0.0599% |
50 | BloFin | YGG-USDT | $0.6998 0.0001922 Eth | $78,575.00 116,385.500 YGG | 0.0597% |
51 | Sushiswap | 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.6953 0.0001905 Eth | $73,853.00 108,868.097 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | 0.0558% |
52 | Aerodrome SlipStream | 0XAAC78D1219C08AECC8E37E03858FE885F5EF1799-0X4200000000000000000000000000000000000006 | $0.697 0.0001913 Eth | $72,050.00 105,706.076 0XAAC78D1219C08AECC8E37E03858FE885F5EF1799 | 0.0542% |
53 | Katana | 0X1C306872BC82525D72BF3562E8F0AA3F8F26E857-0XE514D9DEB7966C8BE0CA922DE8A064264EA6BCD4 | $0.698 0.0001913 Eth | $71,160.00 100,529.793 0X1C306872BC82525D72BF3562E8F0AA3F8F26E857 | 0.0515% |
54 | Crypto.com Exchange | YGG-USD | $0.70 0.0001919 Eth | $68,966.00 98,522.500 YGG | 0.0505% |
55 | Tothemoon | YGG-USDT | $0.6959 0.0001907 Eth | $53,732.00 77,215.961 YGG | 0.0396% |
56 | TokoCrypto | YGG-USDT | $0.6966 0.0001911 Eth | $39,417.00 56,583.107 YGG | 0.0290% |
57 | WEEX | YGG-USDT | $0.7003 0.0001923 Eth | $39,050.00 57,961.000 YGG | 0.0297% |
58 | Kraken | YGG-USD | $0.696 0.0001907 Eth | $30,666.00 44,059.653 YGG | 0.0226% |
59 | Tapbit | YGG-USDT | $0.6962 0.0001909 Eth | $30,018.00 44,687.400 YGG | 0.0229% |
60 | Crypto.com Exchange | YGG-USDT | $0.6958 0.0001907 Eth | $17,012.76 24,449.200 YGG | 0.0125% |
61 | WOO X | YGG-USDT | $0.697 0.0001910 Eth | $11,049.07 15,852.300 YGG | 0.0081% |
62 | Coins.ph | YGG-PHP | $0.6911 0.0001896 Eth | $8,882.51 13,222.590 YGG | 0.0068% |
63 | Kanga | YGG-USDT | $0.6903 0.0001892 Eth | $7,244.19 0.000 YGG | 0.0000% |
64 | Mudrex | YGG-USDT | $0.6998 0.0001921 Eth | $5,084.47 7,265.461 YGG | 0.0037% |
65 | NovaDAX | YGG-BRL | $0.6631 0.0001819 Eth | $4,307.31 6,496.200 YGG | 0.0033% |
66 | Kraken | YGG-EUR | $0.693 0.0001899 Eth | $2,339.43 3,375.889 YGG | 0.0017% |
67 | OKX | YGG-EUR | $0.6604 0.0001810 Eth | $2,237.38 3,289.397 YGG | 0.0017% |
68 | Mercado Bitcoin | YGG-BRL | $0.6947 0.0001906 Eth | $1,436.29 2,067.528 YGG | 0.0011% |
69 | Bittime | YGG-IDR | $0.7009 0.0001923 Eth | $821.93 1,202.400 YGG | 0.0006% |
70 | Foxbit | YGG-BRL | $0.6692 0.0001835 Eth | $732.44 1,065.425 YGG | 0.0005% |
71 | Sushiswap | 0X557B933A7C2C45672B610F8954A3DEB39A51A8CA-0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | $0.6926 0.0001901 Eth | $604.52 138,428.748 0X557B933A7C2C45672B610F8954A3DEB39A51A8CA | 0.0710% |
72 | WEEX | YGG-USDC | $0.70 0.0001922 Eth | $577.72 852.000 YGG | 0.0004% |
73 | Gate.io | YGG-ETH | $0.6942 0.0001903 Eth | $484.87 617.729 YGG | 0.0003% |
74 | TokoCrypto | YGG-BTC | $0.6383 0.0001774 Eth | $396.95 621.865 YGG | 0.0003% |
75 | Korbit | YGG-KRW | $0.6697 0.0001835 Eth | $260.06 390.941 YGG | 0.0002% |
76 | Nominex | YGG-USDT | $0.6361 0.0001791 Eth | $181.36 285.117 YGG | 0.0001% |
77 | ProBit Global | YGG-BTC | $0.5643 0.0001549 Eth | $24.11 42.723 YGG | 0.0000% |
78 | Giottus | YGG-INR | $0.6603 0.0001852 Eth | $18.94 28.683 YGG | 0.0000% |
79 | Gate.io | YGG-TRY | $0.6764 0.0001853 Eth | $7.20 10.640 YGG | 0.0000% |
80 | Gate.io | YGG-USDC | $0.9999 0.0002741 Eth | $6.48 41.870 YGG | 0.0000% |
81 | Poloniex | YGG-USDT | $0.6704 0.0001837 Eth | $5.75 8.309 YGG | 0.0000% |
82 | Sushiswap (Harmony) | 0X63CF309500D8BE0B9FDB8F1FB66C821236C0438C-0X6983D1E6DEF3690C4D616B13597A09E6193EA013 | $0.4021 0.0001207 Eth | $1.47 3.653 0X63CF309500D8BE0B9FDB8F1FB66C821236C0438C | 0.0000% |
83 | ProBit Global | YGG-USDT | $0.6033 0.0001655 Eth | $1.16 1.915 YGG | 0.0000% |
84 | HitBTC | YGG-USDT | $0.6474 0.0001811 Eth | $0.0065 0.010 YGG | 0.0000% |
85 | FMFW.io | YGG-USDT | $0.6474 0.0001811 Eth | $0.0065 0.010 YGG | 0.0000% |
Contract Name:
YGGToken
Compiler Version
v0.6.12+commit.27d51765
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2021-07-26 */ // SPDX-License-Identifier: NONE pragma solidity 0.6.12; // Part: OpenZeppelin/[email protected]/Address /** * @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 in 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"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); 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); } } } } // Part: OpenZeppelin/[email protected]/Context /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // Part: OpenZeppelin/[email protected]/IERC20 /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // Part: OpenZeppelin/[email protected]/SafeMath /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // Part: OpenZeppelin/[email protected]/ERC20 /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } // File: YGGToken.sol contract YGGToken is ERC20("Yield Guild Games Token", "YGG") { constructor() public { _mint(msg.sender, 1_000_000_000 ether); } }
Contract Security Audit
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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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