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Latest 25 from a total of 4,165 transactions
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Withdraw Stake | 20214805 | 6 hrs ago | IN | 0 ETH | 0.00032169 | ||||
Withdraw Stake | 20212228 | 15 hrs ago | IN | 0 ETH | 0.00086774 | ||||
Withdraw Stake | 20208873 | 26 hrs ago | IN | 0 ETH | 0.00022888 | ||||
Withdraw Stake | 20208229 | 28 hrs ago | IN | 0 ETH | 0.00031822 | ||||
Withdraw Stake | 20205783 | 36 hrs ago | IN | 0 ETH | 0.00044009 | ||||
Withdraw Stake | 20191111 | 3 days ago | IN | 0 ETH | 0.00115376 | ||||
Withdraw Stake | 20175222 | 5 days ago | IN | 0 ETH | 0.00037824 | ||||
Withdraw Stake | 20156294 | 8 days ago | IN | 0 ETH | 0.00034181 | ||||
Withdraw Stake | 20152500 | 8 days ago | IN | 0 ETH | 0.00026182 | ||||
Withdraw Stake | 20152119 | 9 days ago | IN | 0 ETH | 0.00020578 | ||||
Withdraw Stake | 20151179 | 9 days ago | IN | 0 ETH | 0.00015769 | ||||
Withdraw Stake | 20135936 | 11 days ago | IN | 0 ETH | 0.00044114 | ||||
Withdraw Stake | 20103297 | 15 days ago | IN | 0 ETH | 0.00039365 | ||||
Withdraw Stake | 20077906 | 19 days ago | IN | 0 ETH | 0.00291943 | ||||
Withdraw Stake | 20077771 | 19 days ago | IN | 0 ETH | 0.00155831 | ||||
Withdraw Stake | 20076082 | 19 days ago | IN | 0 ETH | 0.00460246 | ||||
Withdraw Stake | 20064061 | 21 days ago | IN | 0 ETH | 0.00182598 | ||||
Withdraw Stake | 20048520 | 23 days ago | IN | 0 ETH | 0.00086744 | ||||
Withdraw Stake | 20048445 | 23 days ago | IN | 0 ETH | 0.00097958 | ||||
Withdraw Stake | 20041543 | 24 days ago | IN | 0 ETH | 0.00158502 | ||||
Withdraw Stake | 20031105 | 25 days ago | IN | 0 ETH | 0.00130664 | ||||
Withdraw Stake | 20030978 | 25 days ago | IN | 0 ETH | 0.00117155 | ||||
Withdraw Stake | 20030692 | 26 days ago | IN | 0 ETH | 0.00134248 | ||||
Withdraw Stake | 20021614 | 27 days ago | IN | 0 ETH | 0.00078767 | ||||
Withdraw Stake | 20017712 | 27 days ago | IN | 0 ETH | 0.0008958 |
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Contract Name:
SDAOBondedTokenStake
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)
pragma solidity ^0.6.0; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; contract SDAOBondedTokenStake is Ownable, ReentrancyGuard{ using SafeMath for uint256; ERC20 public token; // Address of token contract and same used for rewards ERC20 public bonusToken; // Address of bonus token contract struct StakeInfo { bool exist; uint256 amount; uint256 rewardComputeIndex; uint256 bonusAmount; } // Staking period timestamp (Debatable on timestamp vs blocknumber - went with timestamp) struct StakePeriod { uint256 startPeriod; uint256 submissionEndPeriod; uint256 endPeriod; uint256 maxStake; uint256 windowRewardAmount; uint256 windowMaxAmount; } address public tokenOperator; // Address to manage the Stake uint256 public maxAirDropStakeBlocks; // Block numbers to complete the airDrop Auto Stakes mapping (address => uint256) public balances; // Useer Token balance in the contract uint256 public currentStakeMapIndex; // Current Stake Index to avoid math calc in all methods mapping (uint256 => StakePeriod) public stakeMap; // List of Stake Holders address[] stakeHolders; // All Stake Holders mapping(address => StakeInfo) stakeHolderInfo; // To store the total stake in a window uint256 public windowTotalStake; // Events event NewOperator(address tokenOperator); event WithdrawToken(address indexed tokenOperator, uint256 amount); event OpenForStake(uint256 indexed stakeIndex, address indexed tokenOperator, uint256 startPeriod, uint256 endPeriod, uint256 rewardAmount); event SubmitStake(uint256 indexed stakeIndex, address indexed staker, uint256 stakeAmount); event WithdrawStake(uint256 indexed stakeIndex, address indexed staker, uint256 stakeAmount, uint256 bonusAmount); event ClaimStake(uint256 indexed stakeIndex, address indexed staker, uint256 totalAmount, uint256 bonusAmount); event AddReward(address indexed staker, uint256 indexed stakeIndex, address tokenOperator, uint256 stakeAmount, uint256 rewardAmount, uint256 windowTotalStake); // Modifiers modifier onlyOperator() { require( msg.sender == tokenOperator, "Only operator can call this function." ); _; } // Token Operator should be able to do auto renewal modifier allowSubmission() { require( now >= stakeMap[currentStakeMapIndex].startPeriod && now <= stakeMap[currentStakeMapIndex].submissionEndPeriod, "Staking at this point not allowed" ); _; } modifier validStakeLimit(address staker, uint256 stakeAmount) { uint256 stakerTotalStake; stakerTotalStake = stakeAmount.add(stakeHolderInfo[staker].amount); // Check for Max Stake per Wallet and stake window max limit require( stakeAmount > 0 && stakerTotalStake <= stakeMap[currentStakeMapIndex].maxStake && windowTotalStake.add(stakeAmount) <= stakeMap[currentStakeMapIndex].windowMaxAmount, "Exceeding max limits" ); _; } // Check for claim - Stake Window should be either in submission phase or after end period modifier allowClaimStake() { require( (now >= stakeMap[currentStakeMapIndex].startPeriod && now <= stakeMap[currentStakeMapIndex].submissionEndPeriod && stakeHolderInfo[msg.sender].amount > 0) || (now > stakeMap[currentStakeMapIndex].endPeriod && stakeHolderInfo[msg.sender].amount > 0), "Invalid claim request"); _; } constructor(address _token, uint256 _maxAirDropStakeBlocks) public { token = ERC20(_token); tokenOperator = msg.sender; currentStakeMapIndex = 0; windowTotalStake = 0; maxAirDropStakeBlocks = _maxAirDropStakeBlocks.add(block.number); } function updateOperator(address newOperator) external onlyOwner { require(newOperator != address(0), "Invalid operator address"); tokenOperator = newOperator; emit NewOperator(newOperator); } function withdrawToken(uint256 value) external onlyOperator { // Check if contract is having required balance require(token.balanceOf(address(this)) >= value, "Not enough balance in the contract"); require(token.transfer(msg.sender, value), "Unable to transfer token to the operator account"); emit WithdrawToken(tokenOperator, value); } // To set the bonus token for future needs function setBonusToken(address _bonusToken) external onlyOwner { require(_bonusToken != address(0), "Invalid bonus token"); bonusToken = ERC20(_bonusToken); } function openForStake(uint256 _startPeriod, uint256 _submissionEndPeriod, uint256 _endPeriod, uint256 _windowRewardAmount, uint256 _maxStake, uint256 _windowMaxAmount) external onlyOperator { // Check Input Parameters require(_startPeriod >= now && _startPeriod < _submissionEndPeriod && _submissionEndPeriod < _endPeriod, "Invalid stake period"); require(_windowRewardAmount > 0 && _maxStake > 0 && _windowMaxAmount > 0, "Invalid inputs" ); // Check Stake in Progress require(currentStakeMapIndex == 0 || (now > stakeMap[currentStakeMapIndex].submissionEndPeriod && _startPeriod >= stakeMap[currentStakeMapIndex].endPeriod), "Cannot have more than one stake request at a time"); // Move the staking period to next one currentStakeMapIndex = currentStakeMapIndex + 1; StakePeriod memory stakePeriod; // Set Staking attributes stakePeriod.startPeriod = _startPeriod; stakePeriod.submissionEndPeriod = _submissionEndPeriod; stakePeriod.endPeriod = _endPeriod; stakePeriod.windowRewardAmount = _windowRewardAmount; stakePeriod.maxStake = _maxStake; stakePeriod.windowMaxAmount = _windowMaxAmount; stakeMap[currentStakeMapIndex] = stakePeriod; // Add the current window reward to the window total stake windowTotalStake = windowTotalStake.add(_windowRewardAmount); emit OpenForStake(currentStakeMapIndex, msg.sender, _startPeriod, _endPeriod, _windowRewardAmount); } // To add the Stake Holder function _createStake(address staker, uint256 stakeAmount) internal returns(bool) { StakeInfo storage stakeInfo = stakeHolderInfo[staker]; // Check if the user already staked in the past if(stakeInfo.exist) { stakeInfo.amount = stakeInfo.amount.add(stakeAmount); } else { StakeInfo memory req; // Create a new stake request req.exist = true; req.amount = stakeAmount; req.rewardComputeIndex = 0; // Add to the Stake Holders List stakeHolderInfo[staker] = req; // Add to the Stake Holders List stakeHolders.push(staker); } return true; } // To submit a new stake for the current window function submitStake(uint256 stakeAmount) external allowSubmission validStakeLimit(msg.sender, stakeAmount) { // Transfer the Tokens to Contract require(token.transferFrom(msg.sender, address(this), stakeAmount), "Unable to transfer token to the contract"); _createStake(msg.sender, stakeAmount); // Update the User balance balances[msg.sender] = balances[msg.sender].add(stakeAmount); // Update current stake period total stake - For Auto Approvals windowTotalStake = windowTotalStake.add(stakeAmount); emit SubmitStake(currentStakeMapIndex, msg.sender, stakeAmount); } // To withdraw stake during submission phase function withdrawStake(uint256 stakeAmount) external allowClaimStake nonReentrant{ //require( // (now >= stakeMap[stakeMapIndex].startPeriod && now <= stakeMap[stakeMapIndex].submissionEndPeriod), // "Stake withdraw at this point is not allowed" //); StakeInfo storage stakeInfo = stakeHolderInfo[msg.sender]; // Validate the input Stake Amount require(stakeAmount > 0 && stakeInfo.amount >= stakeAmount, "Cannot withdraw beyond stake amount"); uint256 bonusAmount; // Update the staker balance in the staking window stakeInfo.amount = stakeInfo.amount.sub(stakeAmount); bonusAmount = stakeInfo.bonusAmount; stakeInfo.bonusAmount = 0; // Update the User balance balances[msg.sender] = balances[msg.sender].sub(stakeAmount); // Update current stake period total stake - For Auto Approvals windowTotalStake = windowTotalStake.sub(stakeAmount); // Return to User Wallet require(token.transfer(msg.sender, stakeAmount), "Unable to transfer token to the account"); // Call the bonus transfer function - Should transfer only if set if(address(bonusToken) != address(0) && bonusAmount > 0) { require(bonusToken.transfer(msg.sender, bonusAmount), "Unable to transfer bonus token to the account"); } emit WithdrawStake(currentStakeMapIndex, msg.sender, stakeAmount, bonusAmount); } // To claim from the stake window function claimStake() external allowClaimStake nonReentrant{ StakeInfo storage stakeInfo = stakeHolderInfo[msg.sender]; uint256 stakeAmount; uint256 bonusAmount; // No more stake windows or in submission phase stakeAmount = stakeInfo.amount; bonusAmount = stakeInfo.bonusAmount; stakeInfo.amount = 0; stakeInfo.bonusAmount = 0; // Update current stake period total stake windowTotalStake = windowTotalStake.sub(stakeAmount); // Check for balance in the contract require(token.balanceOf(address(this)) >= stakeAmount, "Not enough balance in the contract"); // Update the User Balance balances[msg.sender] = balances[msg.sender].sub(stakeAmount); // Call the transfer function require(token.transfer(msg.sender, stakeAmount), "Unable to transfer token back to the account"); // Call the bonus transfer function - Should transfer only if set if(address(bonusToken) != address(0) && bonusAmount > 0) { require(bonusToken.transfer(msg.sender, bonusAmount), "Unable to transfer bonus token to the account"); } emit ClaimStake(currentStakeMapIndex, msg.sender, stakeAmount, bonusAmount); } function _calculateRewardAmount(uint256 stakeMapIndex, uint256 stakeAmount) internal view returns(uint256) { uint256 calcRewardAmount; if(windowTotalStake > stakeMap[stakeMapIndex].windowRewardAmount) { calcRewardAmount = stakeAmount.mul(stakeMap[stakeMapIndex].windowRewardAmount).div(windowTotalStake.sub(stakeMap[stakeMapIndex].windowRewardAmount)); } return calcRewardAmount; } // Update reward for staker in the respective stake window function computeAndAddReward(uint256 stakeMapIndex, address staker, uint256 stakeBonusAmount) public onlyOperator returns(bool) { // Check for the Incubation Period require( now > stakeMap[stakeMapIndex].submissionEndPeriod && now < stakeMap[stakeMapIndex].endPeriod, "Reward cannot be added now" ); StakeInfo storage stakeInfo = stakeHolderInfo[staker]; // Check if reward already computed require(stakeInfo.amount > 0 && stakeInfo.rewardComputeIndex != stakeMapIndex, "Invalid reward request"); // Calculate the totalAmount uint256 totalAmount; uint256 rewardAmount; // Calculate the reward amount for the current window totalAmount = stakeInfo.amount; rewardAmount = _calculateRewardAmount(stakeMapIndex, totalAmount); totalAmount = totalAmount.add(rewardAmount); // Add the reward amount stakeInfo.amount = totalAmount; // Add the bonus Amount stakeInfo.bonusAmount = stakeInfo.bonusAmount.add(stakeBonusAmount); // Update the reward compute index to avoid mulitple addition stakeInfo.rewardComputeIndex = stakeMapIndex; // Update the User Balance balances[staker] = balances[staker].add(rewardAmount); emit AddReward(staker, stakeMapIndex, tokenOperator, totalAmount, rewardAmount, windowTotalStake); return true; } function updateRewards(uint256 stakeMapIndex, address[] calldata staker, uint256 stakeBonusAmount) external onlyOperator { for(uint256 indx = 0; indx < staker.length; indx++) { require(computeAndAddReward(stakeMapIndex, staker[indx], stakeBonusAmount)); } } // AirDrop to Stake - Load existing stakes from Air Drop function airDropStakes(uint256 stakeMapIndex, address[] calldata staker, uint256[] calldata stakeAmount) external onlyOperator { // Add check for Block Number to restrict air drop auto stake phase after certain block number require(block.number < maxAirDropStakeBlocks, "Exceeds airdrop auto stake phase"); // Check Input Parameters require(staker.length == stakeAmount.length, "Invalid Input Arrays"); // Stakers should be for current window require(currentStakeMapIndex == stakeMapIndex, "Invalid Stake Window Index"); for(uint256 indx = 0; indx < staker.length; indx++) { StakeInfo memory req; // Create a stake request with amount req.exist = true; req.amount = stakeAmount[indx]; req.rewardComputeIndex = 0; // Add to the Stake Holders List stakeHolderInfo[staker[indx]] = req; // Add to the Stake Holders List stakeHolders.push(staker[indx]); // Update the User balance balances[staker[indx]] = stakeAmount[indx]; // Update current stake period total stake - Along with Reward windowTotalStake = windowTotalStake.add(stakeAmount[indx]); } } // Getter Functions function getStakeHolders() external view returns(address[] memory) { return stakeHolders; } function getStakeInfo(address staker) external view returns (bool found, uint256 amount, uint256 rewardComputeIndex, uint256 bonusAmount) { StakeInfo memory stakeInfo = stakeHolderInfo[staker]; found = false; if(stakeInfo.exist) { found = true; } amount = stakeInfo.amount; rewardComputeIndex = stakeInfo.rewardComputeIndex; bonusAmount = stakeInfo.bonusAmount; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /* * @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; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; import "../GSN/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @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 ^0.6.0; import "../../GSN/Context.sol"; import "./IERC20.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; /** * @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 { } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @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 ^0.6.2; /** * @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 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); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /** * @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; } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 200 }, "evmVersion": "istanbul", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
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ERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenOperator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOperator","type":"address"}],"name":"updateOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"stakeMapIndex","type":"uint256"},{"internalType":"address[]","name":"staker","type":"address[]"},{"internalType":"uint256","name":"stakeBonusAmount","type":"uint256"}],"name":"updateRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"windowTotalStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"stakeAmount","type":"uint256"}],"name":"withdrawStake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000993864e43caa7f7f12953ad6feb1d1ca635b875f000000000000000000000000000000000000000000000000000000000000e100
-----Decoded View---------------
Arg [0] : _token (address): 0x993864E43Caa7F7F12953AD6fEb1d1Ca635B875F
Arg [1] : _maxAirDropStakeBlocks (uint256): 57600
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000993864e43caa7f7f12953ad6feb1d1ca635b875f
Arg [1] : 000000000000000000000000000000000000000000000000000000000000e100
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $0.432732 | 2,639,423.221 | $1,142,162.89 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.