Overview
Max Total Supply
1,000,000,000 YGG
Holders
23,466 ( -0.047%)
Market
Price
$0.60 @ 0.000180 ETH (-4.57%)
Onchain Market Cap
$600,409,000.00
Circulating Supply Market Cap
$231,393,676.00
Other Info
Token Contract (WITH 18 Decimals)
Balance
97.714269159014895346 YGGValue
$58.67 ( ~0.0176274378851692 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
---|---|---|---|---|---|
1 | BTCC | YGG-USDT | $0.5991 0.0001800 Eth | $35,117,784.00 58,621,624.400 YGG | 25.1346% |
2 | Binance | YGG-USDT | $0.598 0.0001802 Eth | $23,051,047.00 38,558,382.300 YGG | 16.5323% |
3 | Websea | YGG-USDT | $0.5995 0.0001802 Eth | $13,710,566.00 0.000 YGG | 0.0000% |
4 | Gate.io | YGG-USDT | $0.6004 0.0001804 Eth | $10,354,869.00 17,246,315.270 YGG | 7.3945% |
5 | OKX | YGG-USDT | $0.599 0.0001800 Eth | $9,059,176.00 15,173,314.244 YGG | 6.5057% |
6 | BTSE | YGG-USDT | $0.6019 0.0001810 Eth | $6,422,845.00 10,670,341.098 YGG | 4.5750% |
7 | DigiFinex | YGG-USDT | $0.5991 0.0001800 Eth | $5,604,679.00 9,354,862.000 YGG | 4.0110% |
8 | WhiteBIT | YGG-USDT | $0.6003 0.0001806 Eth | $5,220,193.00 8,695,795.770 YGG | 3.7284% |
9 | HTX | YGG-USDT | $0.5989 0.0001800 Eth | $5,089,819.00 8,474,803.232 YGG | 3.6337% |
10 | Nami.Exchange | YGG-VNST | $0.5981 0.0001799 Eth | $4,455,021.00 7,448,525.500 YGG | 3.1936% |
11 | Bitunix | YGG-USDT | $0.601 0.0001807 Eth | $4,124,965.00 6,865,157.100 YGG | 2.9435% |
12 | Nami.Exchange | YGG-USDT | $0.6003 0.0001805 Eth | $3,784,798.00 6,304,385.200 YGG | 2.7031% |
13 | Bitget | YGG-USDT | $0.599 0.0001800 Eth | $2,295,191.00 3,830,557.190 YGG | 1.6424% |
14 | Phemex | YGG-USDT | $0.6008 0.0001808 Eth | $2,286,367.00 3,805,246.970 YGG | 1.6315% |
15 | Bibox | YGG-USDT | $0.5931 0.0001782 Eth | $2,203,257.00 3,715,015.000 YGG | 1.5928% |
16 | Ourbit | YGG-USDT | $0.5985 0.0001799 Eth | $2,135,201.00 3,570,415.950 YGG | 1.5309% |
17 | Bitrue | YGG-USDT | $0.6002 0.0001806 Eth | $2,114,583.00 3,522,915.560 YGG | 1.5105% |
18 | Hotcoin | YGG-USDT | $0.5991 0.0001800 Eth | $1,920,350.00 3,205,507.300 YGG | 1.3744% |
19 | Biconomy.com | YGG-USDT | $0.6005 0.0001807 Eth | $1,364,366.00 2,272,292.100 YGG | 0.9743% |
20 | Koinpark | YGG-USDT | $0.5958 0.0001795 Eth | $1,240,426.00 2,081,956.492 YGG | 0.8927% |
21 | LBank | YGG-USDT | $0.5985 0.0001798 Eth | $1,198,929.00 2,003,293.550 YGG | 0.8589% |
22 | Binance | YGG-BTC | $0.5997 0.0001803 Eth | $992,625.00 1,664,773.300 YGG | 0.7138% |
23 | BYDFi | YGG-USDT | $0.6011 0.0001810 Eth | $989,025.00 1,645,370.400 YGG | 0.7055% |
24 | KuCoin | YGG-USDT | $0.5996 0.0001804 Eth | $843,215.00 1,406,212.605 YGG | 0.6029% |
25 | Bithumb | YGG-KRW | $0.6044 0.0001818 Eth | $819,581.00 1,356,106.879 YGG | 0.5814% |
26 | CoinCatch | YGG-USDT | $0.5976 0.0001801 Eth | $632,094.00 1,050,773.180 YGG | 0.4505% |
27 | OrangeX | YGG-USDT | $0.5993 0.0001801 Eth | $615,044.00 1,022,967.700 YGG | 0.4386% |
28 | Hibt | YGG-USDT | $0.5993 0.0001806 Eth | $545,823.00 913,742.105 YGG | 0.3918% |
29 | XT.COM | YGG-USDT | $0.6002 0.0001806 Eth | $464,015.00 776,308.400 YGG | 0.3328% |
30 | FameEX | YGG-USDT | $0.5993 0.0001801 Eth | $460,507.00 770,854.000 YGG | 0.3305% |
31 | PointPay | YGG-USDT | $0.60 0.0001805 Eth | $383,034.00 641,607.049 YGG | 0.2751% |
32 | BingX | YGG-USDT | $0.5994 0.0001801 Eth | $364,212.00 609,815.745 YGG | 0.2615% |
33 | Binance | YGG-USDC | $0.5998 0.0001805 Eth | $354,367.00 602,842.900 YGG | 0.2585% |
34 | CoinTR | YGG-USDT | $0.5992 0.0001800 Eth | $297,135.00 493,023.800 YGG | 0.2114% |
35 | BVOX | YGG-USDT | $0.5998 0.0001804 Eth | $253,461.00 423,626.600 YGG | 0.1816% |
36 | Upbit | YGG-BTC | $0.6057 0.0001820 Eth | $251,230.00 414,807.745 YGG | 0.1779% |
37 | Koinpark | YGG-INR | $0.6094 0.0001831 Eth | $246,743.00 404,896.939 YGG | 0.1736% |
38 | Upbit Indonesia | YGG-BTC | $0.5983 0.0001801 Eth | $246,097.00 411,346.842 YGG | 0.1764% |
39 | MEXC | YGG-USDT | $0.6001 0.0001805 Eth | $216,597.00 360,964.070 YGG | 0.1548% |
40 | CoinW | YGG-USDT | $0.5987 0.0001804 Eth | $200,273.00 334,507.263 YGG | 0.1434% |
41 | Toobit | YGG-USDT | $0.6001 0.0001805 Eth | $188,056.00 314,680.900 YGG | 0.1349% |
42 | Pionex | YGG-USDT | $0.5989 0.0001802 Eth | $176,354.00 295,306.268 YGG | 0.1266% |
43 | Bitvavo | YGG-EUR | $0.5992 0.0001803 Eth | $142,036.00 237,057.772 YGG | 0.1016% |
44 | LATOKEN | YGG-USDT | $0.6011 0.0001808 Eth | $129,865.00 216,058.790 YGG | 0.0926% |
45 | BitMart | YGG-USDT | $0.6002 0.0001804 Eth | $114,470.00 190,714.552 YGG | 0.0818% |
46 | DeGate | 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48 | $0.6005 0.0001807 Eth | $110,390.00 184,105.670 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | 0.0789% |
47 | OKX | YGG-USDC | $0.595 0.0001788 Eth | $97,703.00 165,905.201 YGG | 0.0711% |
48 | Binance | YGG-TRY | $0.5996 0.0001807 Eth | $87,351.00 146,763.600 YGG | 0.0629% |
49 | Sushiswap | 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2 | $0.5967 0.0001796 Eth | $74,688.00 125,306.236 0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | 0.0537% |
50 | Aerodrome SlipStream | 0XAAC78D1219C08AECC8E37E03858FE885F5EF1799-0X4200000000000000000000000000000000000006 | $0.5987 0.0001801 Eth | $70,190.00 118,976.736 0XAAC78D1219C08AECC8E37E03858FE885F5EF1799 | 0.0510% |
51 | Kraken | YGG-USD | $0.598 0.0001797 Eth | $64,229.00 107,405.588 YGG | 0.0461% |
52 | BloFin | YGG-USDT | $0.5972 0.0001800 Eth | $50,935.00 84,738.800 YGG | 0.0363% |
53 | Tapbit | YGG-USDT | $0.6003 0.0001806 Eth | $49,011.00 81,728.700 YGG | 0.0350% |
54 | Tothemoon | YGG-USDT | $0.5996 0.0001802 Eth | $47,305.00 78,890.075 YGG | 0.0338% |
55 | Katana | 0X1C306872BC82525D72BF3562E8F0AA3F8F26E857-0XE514D9DEB7966C8BE0CA922DE8A064264EA6BCD4 | $0.5974 0.0001795 Eth | $45,642.00 75,858.943 0X1C306872BC82525D72BF3562E8F0AA3F8F26E857 | 0.0325% |
56 | WEEX | YGG-USDT | $0.5966 0.0001799 Eth | $34,001.00 56,608.000 YGG | 0.0243% |
57 | CoinEx | YGG-USDT | $0.5992 0.0001802 Eth | $31,473.00 51,850.312 YGG | 0.0222% |
58 | Coins.ph | YGG-PHP | $0.5969 0.0001794 Eth | $22,991.00 38,658.100 YGG | 0.0166% |
59 | Crypto.com Exchange | YGG-USD | $0.5992 0.0001801 Eth | $18,303.10 30,545.900 YGG | 0.0131% |
60 | TokoCrypto | YGG-USDT | $0.5982 0.0001803 Eth | $17,512.98 29,274.731 YGG | 0.0126% |
61 | WOO X | YGG-USDT | $0.599 0.0001802 Eth | $15,312.85 25,565.200 YGG | 0.0110% |
62 | Kraken | YGG-EUR | $0.5948 0.0001787 Eth | $14,242.57 23,946.062 YGG | 0.0103% |
63 | Crypto.com Exchange | YGG-USDT | $0.6002 0.0001804 Eth | $13,582.35 22,629.200 YGG | 0.0097% |
64 | Kanga | YGG-USDT | $0.5974 0.0001800 Eth | $7,199.52 0.000 YGG | 0.0000% |
65 | Mudrex | YGG-USDT | $0.5997 0.0001804 Eth | $5,858.69 9,768.759 YGG | 0.0042% |
66 | OKX | YGG-EUR | $0.5739 0.0001725 Eth | $2,225.80 3,871.639 YGG | 0.0017% |
67 | Mercado Bitcoin | YGG-BRL | $0.6143 0.0001846 Eth | $1,552.88 2,527.873 YGG | 0.0011% |
68 | Sushiswap | 0X557B933A7C2C45672B610F8954A3DEB39A51A8CA-0X25F8087EAD173B73D6E8B84329989A8EEA16CF73 | $0.5971 0.0001795 Eth | $764.89 196,383.509 0X557B933A7C2C45672B610F8954A3DEB39A51A8CA | 0.0842% |
69 | Gate.io | YGG-TRY | $0.5973 0.0001795 Eth | $674.60 1,158.580 YGG | 0.0005% |
70 | Korbit | YGG-KRW | $0.6082 0.0001827 Eth | $151.66 262.539 YGG | 0.0001% |
71 | Bittime | YGG-IDR | $0.6035 0.0001816 Eth | $140.94 234.000 YGG | 0.0001% |
72 | Foxbit | YGG-BRL | $0.5971 0.0001799 Eth | $120.62 202.038 YGG | 0.0001% |
73 | Gate.io | YGG-ETH | $0.6022 0.0001809 Eth | $71.07 121.786 YGG | 0.0001% |
74 | NovaDAX | YGG-BRL | $0.5735 0.0001725 Eth | $49.44 86.200 YGG | 0.0000% |
75 | TokoCrypto | YGG-BTC | $0.5997 0.0001803 Eth | $38.26 63.795 YGG | 0.0000% |
76 | ProBit Global | YGG-BTC | $0.5362 0.0001613 Eth | $22.91 42.723 YGG | 0.0000% |
77 | Nominex | YGG-USDT | $0.6454 0.0001857 Eth | $12.02 18.629 YGG | 0.0000% |
78 | Gate.io | YGG-USDC | $0.4998 0.0001502 Eth | $5.25 10.500 YGG | 0.0000% |
79 | ProBit Global | YGG-USDT | $0.5942 0.0001788 Eth | $4.15 6.991 YGG | 0.0000% |
80 | FMFW.io | YGG-USDT | $0.431 0.0001297 Eth | $2.06 4.780 YGG | 0.0000% |
81 | HitBTC | YGG-USDT | $0.4312 0.0001296 Eth | $2.04 4.780 YGG | 0.0000% |
82 | Poloniex | YGG-USDT | $0.611 0.0001838 Eth | $1.90 3.102 YGG | 0.0000% |
83 | Sushiswap (Harmony) | 0X63CF309500D8BE0B9FDB8F1FB66C821236C0438C-0X6983D1E6DEF3690C4D616B13597A09E6193EA013 | $0.4021 0.0001207 Eth | $1.47 3.653 0X63CF309500D8BE0B9FDB8F1FB66C821236C0438C | 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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