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ERC-20
Overview
Max Total Supply
0 X2:BULL
Holders
6
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0 X2:BULLValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
X2Token
Compiler Version
v0.6.12+commit.27d51765
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./libraries/token/IERC20.sol"; import "./libraries/token/SafeERC20.sol"; import "./libraries/math/SafeMath.sol"; import "./libraries/utils/ReentrancyGuard.sol"; import "./interfaces/IX2Fund.sol"; import "./interfaces/IX2Market.sol"; import "./interfaces/IX2Token.sol"; // rewards code adapated from https://github.com/trusttoken/smart-contracts/blob/master/contracts/truefi/TrueFarm.sol contract X2Token is IERC20, IX2Token, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; struct Ledger { uint128 balance; uint128 cost; } // max uint128 has 38 digits // the initial divisor has 10 digits // each 1 wei of rewards will increase cumulativeRewardPerToken by // 1*10^10 (PRECISION 10^20 / divisor 10^10) // assuming a supply of only 1 wei of X2Tokens // if the reward token has 18 decimals, total rewards of up to // 1 billion reward tokens is supported // max uint96 has 28 digits, so max claimable rewards also supports // 1 billion reward tokens struct Reward { uint128 previousCumulativeRewardPerToken; uint96 claimable; uint32 lastBoughtAt; } uint256 constant HOLDING_TIME = 10 minutes; uint256 constant PRECISION = 1e20; uint256 constant MAX_BALANCE = uint128(-1); uint256 constant MAX_REWARD = uint96(-1); uint256 constant MAX_CUMULATIVE_REWARD = uint128(-1); uint256 constant MAX_QUANTITY_POINTS = 1e30; string public name = "X2"; string public symbol = "X2"; uint8 public constant decimals = 18; // _totalSupply also tracks totalStaked uint256 public override _totalSupply; address public override market; address public factory; address public override distributor; address public override rewardToken; // ledgers track balances and costs mapping (address => Ledger) public ledgers; mapping (address => mapping (address => uint256)) public allowances; // track previous cumulated rewards and claimable rewards for accounts mapping(address => Reward) public rewards; // track overall cumulative rewards uint256 public override cumulativeRewardPerToken; bool public isInitialized; event Claim(address receiver, uint256 amount); modifier onlyFactory() { require(msg.sender == factory, "X2Token: forbidden"); _; } modifier onlyMarket() { require(msg.sender == market, "X2Token: forbidden"); _; } receive() external payable {} function initialize(address _factory, address _market) public { require(!isInitialized, "X2Token: already initialized"); isInitialized = true; factory = _factory; market = _market; } function setDistributor(address _distributor, address _rewardToken) external override onlyFactory { distributor = _distributor; rewardToken = _rewardToken; } function setInfo(string memory _name, string memory _symbol) external override onlyFactory { name = _name; symbol = _symbol; } function mint(address _account, uint256 _amount, uint256 _divisor) external override onlyMarket { _mint(_account, _amount, _divisor); } function burn(address _account, uint256 _burnPoints, bool _distribute) external override onlyMarket returns (uint256) { return _burn(_account, _burnPoints, _distribute); } function totalSupply() external view override returns (uint256) { return _totalSupply.div(getDivisor()); } function transfer(address _recipient, uint256 _amount) external override returns (bool) { _transfer(msg.sender, _recipient, _amount); return true; } function allowance(address _owner, address _spender) external view override returns (uint256) { return allowances[_owner][_spender]; } function approve(address _spender, uint256 _amount) external override returns (bool) { _approve(msg.sender, _spender, _amount); return true; } function transferFrom(address _sender, address _recipient, uint256 _amount) public override returns (bool) { uint256 nextAllowance = allowances[_sender][msg.sender].sub(_amount, "X2Token: transfer amount exceeds allowance"); _approve(_sender, msg.sender, nextAllowance); _transfer(_sender, _recipient, _amount); return true; } function claim(address _receiver) external nonReentrant { address _account = msg.sender; uint256 cachedTotalSupply = _totalSupply; _updateRewards(_account, cachedTotalSupply, true, false); Reward storage reward = rewards[_account]; uint256 rewardToClaim = reward.claimable; reward.claimable = 0; IERC20(rewardToken).transfer(_receiver, rewardToClaim); emit Claim(_receiver, rewardToClaim); } function getDivisor() public override view returns (uint256) { return IX2Market(market).getDivisor(address(this)); } function lastBoughtAt(address _account) public override view returns (uint256) { return uint256(rewards[_account].lastBoughtAt); } function hasPendingPurchase(address _account) public view returns (bool) { return lastBoughtAt(_account) > block.timestamp.sub(HOLDING_TIME); } function getPendingProfit(address _account) public override view returns (uint256) { if (!hasPendingPurchase(_account)) { return 0; } uint256 balance = uint256(ledgers[_account].balance).div(getDivisor()); uint256 cost = costOf(_account); return balance <= cost ? 0 : balance.sub(cost); } function balanceOf(address _account) public view override returns (uint256) { uint256 balance = uint256(ledgers[_account].balance).div(getDivisor()); if (!hasPendingPurchase(_account)) { return balance; } uint256 cost = costOf(_account); return balance < cost ? balance : cost; } function _balanceOf(address _account) public view override returns (uint256) { return uint256(ledgers[_account].balance); } function costOf(address _account) public override view returns (uint256) { return uint256(ledgers[_account].cost); } function getReward(address _account) public override view returns (uint256) { return uint256(rewards[_account].claimable); } function _transfer(address _sender, address _recipient, uint256 _amount) private { require(!hasPendingPurchase(_sender), "X2Token: holding time not yet passed"); require(_sender != address(0), "X2Token: transfer from the zero address"); require(_recipient != address(0), "X2Token: transfer to the zero address"); uint256 divisor = getDivisor(); _decreaseBalance(_sender, _amount, divisor, true); _increaseBalance(_recipient, _amount, divisor, false); emit Transfer(_sender, _recipient, _amount); } function _mint(address _account, uint256 _amount, uint256 _divisor) private { require(_account != address(0), "X2Token: mint to the zero address"); _increaseBalance(_account, _amount, _divisor, true); emit Transfer(address(0), _account, _amount); } function _burn(address _account, uint256 _burnPoints, bool _distribute) private returns (uint256) { require(_account != address(0), "X2Token: burn from the zero address"); uint256 divisor = getDivisor(); Ledger memory ledger = ledgers[_account]; uint256 balance = uint256(ledger.balance).div(divisor); uint256 amount = balance.mul(_burnPoints).div(MAX_QUANTITY_POINTS); uint256 scaledAmount = amount; if (hasPendingPurchase(_account) && balance > ledger.cost) { // if there is a pending purchase and the user's balance // is greater than their cost, it means they have a pending profit // we scale up the amount to burn the proportional amount of // pending profit amount = uint256(ledger.cost).mul(_burnPoints).div(MAX_QUANTITY_POINTS); scaledAmount = amount.mul(balance).div(ledger.cost); } _decreaseBalance(_account, scaledAmount, divisor, _distribute); emit Transfer(_account, address(0), amount); return amount; } function _approve(address _owner, address _spender, uint256 _amount) private { require(_owner != address(0), "X2Token: approve from the zero address"); require(_spender != address(0), "X2Token: approve to the zero address"); allowances[_owner][_spender] = _amount; emit Approval(_owner, _spender, _amount); } function _increaseBalance(address _account, uint256 _amount, uint256 _divisor, bool _updateLastBoughtAt) private { if (_amount == 0) { return; } uint256 cachedTotalSupply = _totalSupply; _updateRewards(_account, cachedTotalSupply, true, _updateLastBoughtAt); uint256 scaledAmount = _amount.mul(_divisor); Ledger memory ledger = ledgers[_account]; uint256 nextBalance = uint256(ledger.balance).add(scaledAmount); require(nextBalance < MAX_BALANCE, "X2Token: balance limit exceeded"); uint256 cost = uint256(ledger.cost).add(_amount); require(cost < MAX_BALANCE, "X2Token: cost limit exceeded"); ledgers[_account] = Ledger( uint128(nextBalance), uint128(cost) ); _totalSupply = cachedTotalSupply.add(scaledAmount); } function _decreaseBalance(address _account, uint256 _amount, uint256 _divisor, bool _distribute) private { if (_amount == 0) { return; } uint256 cachedTotalSupply = _totalSupply; _updateRewards(_account, cachedTotalSupply, _distribute, false); uint256 scaledAmount = _amount.mul(_divisor); Ledger memory ledger = ledgers[_account]; // since _amount is not zero, so scaledAmount should not be zero // if ledger.balance is zero, then uint256(ledger.balance).sub(scaledAmount) // should fail, so we can calculate cost with ...div(ledger.balance) // as ledger.balance should not be zero uint256 nextBalance = uint256(ledger.balance).sub(scaledAmount); uint256 cost = uint256(ledger.cost).mul(nextBalance).div(ledger.balance); ledgers[_account] = Ledger( uint128(nextBalance), uint128(cost) ); _totalSupply = cachedTotalSupply.sub(scaledAmount); } function _updateRewards(address _account, uint256 _cachedTotalSupply, bool _distribute, bool _updateLastBoughtAt) private { uint256 blockReward; Reward memory reward = rewards[_account]; if (_distribute && distributor != address(0)) { blockReward = IX2Fund(distributor).distribute(); } uint256 _cumulativeRewardPerToken = cumulativeRewardPerToken; // only update cumulativeRewardPerToken when there are stakers, i.e. when _totalSupply > 0 // if blockReward == 0, then there will be no change to cumulativeRewardPerToken if (_cachedTotalSupply > 0 && blockReward > 0) { // PRECISION is 10^20 and the BASE_DIVISOR is 10^10 // cachedTotalSupply = _totalSupply * divisor // the divisor will be around 10^10 // if 1000 ETH worth is minted, then cachedTotalSupply = 1000 * 10^18 * 10^10 = 10^31 // cumulativeRewardPerToken will increase by blockReward * 10^20 / (10^31) // if the blockReward is 0.001 REWARD_TOKENS // then cumulativeRewardPerToken will increase by 10^-3 * 10^18 * 10^20 / (10^31) // which is 10^35 / 10^31 or 10^4 // if rewards are distributed every hour then at least 0.168 REWARD_TOKENS should be distributed per week // so that there will not be precision issues for distribution _cumulativeRewardPerToken = _cumulativeRewardPerToken.add(blockReward.mul(PRECISION).div(_cachedTotalSupply)); cumulativeRewardPerToken = _cumulativeRewardPerToken; } // ledgers[_account].balance = balance * divisor // this divisor will be around 10^10 // assuming that cumulativeRewardPerToken increases by at least 10^4 // the claimableReward will increase by balance * 10^10 * 10^4 / 10^20 // if the total supply is 1000 ETH // a user must own at least 10^-6 ETH or 0.000001 ETH worth of tokens to get some rewards uint256 claimableReward = uint256(reward.claimable).add( uint256(ledgers[_account].balance).mul(_cumulativeRewardPerToken.sub(reward.previousCumulativeRewardPerToken)).div(PRECISION) ); if (claimableReward > MAX_REWARD) { claimableReward = MAX_REWARD; } if (_cumulativeRewardPerToken > MAX_CUMULATIVE_REWARD) { _cumulativeRewardPerToken = MAX_CUMULATIVE_REWARD; } rewards[_account] = Reward( // update previous cumulative reward for sender uint128(_cumulativeRewardPerToken), uint96(claimableReward), _updateLastBoughtAt ? uint32(block.timestamp % 2**32) : reward.lastBoughtAt ); } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @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); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./IERC20.sol"; import "../math/SafeMath.sol"; import "../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @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; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IX2Fund { function distribute() external returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IX2Market { function bullToken() external view returns (address); function bearToken() external view returns (address); function latestPrice() external view returns (uint256); function lastPrice() external view returns (uint256); function getFunding() external view returns (uint256, uint256); function getDivisor(address token) external view returns (uint256); function getDivisors(uint256 _lastPrice, uint256 _nextPrice) external view returns (uint256, uint256); function setAppFee(uint256 feeBasisPoints) external; function setFunding(uint256 divisor) external; function cachedBullDivisor() external view returns (uint128); function cachedBearDivisor() external view returns (uint128); }
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; interface IX2Token { function cumulativeRewardPerToken() external view returns (uint256); function lastBoughtAt(address account) external view returns (uint256); function getPendingProfit(address account) external view returns (uint256); function distributor() external view returns (address); function rewardToken() external view returns (address); function _totalSupply() external view returns (uint256); function _balanceOf(address account) external view returns (uint256); function market() external view returns (address); function getDivisor() external view returns (uint256); function getReward(address account) external view returns (uint256); function costOf(address account) external view returns (uint256); function mint(address account, uint256 amount, uint256 divisor) external; function burn(address account, uint256 amount, bool distribute) external returns (uint256); function setDistributor(address _distributor, address _rewardToken) external; function setInfo(string memory name, string memory symbol) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.2; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.3._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.3._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"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":false,"internalType":"address","name":"receiver","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claim","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":"_account","type":"address"}],"name":"_balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"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":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowances","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":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"_burnPoints","type":"uint256"},{"internalType":"bool","name":"_distribute","type":"bool"}],"name":"burn","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_receiver","type":"address"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"costOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cumulativeRewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"distributor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getDivisor","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"getPendingProfit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"getReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"hasPendingPurchase","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_market","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"lastBoughtAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"ledgers","outputs":[{"internalType":"uint128","name":"balance","type":"uint128"},{"internalType":"uint128","name":"cost","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"market","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_divisor","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint128","name":"previousCumulativeRewardPerToken","type":"uint128"},{"internalType":"uint96","name":"claimable","type":"uint96"},{"internalType":"uint32","name":"lastBoughtAt","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_distributor","type":"address"},{"internalType":"address","name":"_rewardToken","type":"address"}],"name":"setDistributor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"}],"name":"setInfo","outputs":[],"stateMutability":"nonpayable","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"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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