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Latest 25 from a total of 7,039 transactions
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Get Yield | 20236962 | 2 hrs ago | IN | 0 ETH | 0.00119348 | ||||
Get Yield | 20235507 | 7 hrs ago | IN | 0 ETH | 0.00123675 | ||||
Get Yield | 20234224 | 11 hrs ago | IN | 0 ETH | 0.00221842 | ||||
Get Yield | 20232269 | 18 hrs ago | IN | 0 ETH | 0.00172866 | ||||
Get Yield | 20231656 | 20 hrs ago | IN | 0 ETH | 0.00079556 | ||||
Get Yield | 20231582 | 20 hrs ago | IN | 0 ETH | 0.00066512 | ||||
Get Yield | 20231156 | 22 hrs ago | IN | 0 ETH | 0.00031915 | ||||
Get Yield | 20229782 | 26 hrs ago | IN | 0 ETH | 0.00060192 | ||||
Get Yield | 20229775 | 26 hrs ago | IN | 0 ETH | 0.00055243 | ||||
Checkpoint | 20229559 | 27 hrs ago | IN | 0 ETH | 0.00048541 | ||||
Checkpoint | 20229549 | 27 hrs ago | IN | 0 ETH | 0.00036734 | ||||
Get Yield | 20229540 | 27 hrs ago | IN | 0 ETH | 0.00064993 | ||||
Get Yield | 20228992 | 29 hrs ago | IN | 0 ETH | 0.00143444 | ||||
Checkpoint | 20227913 | 32 hrs ago | IN | 0 ETH | 0.00109488 | ||||
Get Yield | 20227693 | 33 hrs ago | IN | 0 ETH | 0.00130412 | ||||
Get Yield | 20226797 | 36 hrs ago | IN | 0 ETH | 0.00277877 | ||||
Get Yield | 20223935 | 46 hrs ago | IN | 0 ETH | 0.00037227 | ||||
Get Yield | 20222830 | 2 days ago | IN | 0 ETH | 0.00054207 | ||||
Get Yield | 20220547 | 2 days ago | IN | 0 ETH | 0.00093469 | ||||
Get Yield | 20219742 | 2 days ago | IN | 0 ETH | 0.00146196 | ||||
Get Yield | 20217845 | 2 days ago | IN | 0 ETH | 0.00066069 | ||||
Get Yield | 20215411 | 3 days ago | IN | 0 ETH | 0.00037273 | ||||
Get Yield | 20215344 | 3 days ago | IN | 0 ETH | 0.00039624 | ||||
Get Yield | 20210725 | 3 days ago | IN | 0 ETH | 0.00081369 | ||||
Get Yield | 20210209 | 3 days ago | IN | 0 ETH | 0.00086386 |
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Contract Name:
HiIQRewards
Compiler Version
v0.7.1+commit.f4a555be
Optimization Enabled:
Yes with 1000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.7.1; pragma experimental ABIEncoderV2; // ==================================================================== // | ______ _______ | // | / _____________ __ __ / ____(_____ ____ _____ ________ | // | / /_ / ___/ __ `| |/_/ / /_ / / __ \/ __ `/ __ \/ ___/ _ \ | // | / __/ / / / /_/ _> < / __/ / / / / / /_/ / / / / /__/ __/ | // | /_/ /_/ \__,_/_/|_| /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/ | // | | // ==================================================================== // ======================veFXSYieldDistributorV4======================= // ==================================================================== // Distributes IQ protocol yield based on the claimer's hiIQ balance // V3: Yield will now not accrue for unlocked hiIQ // Frax Finance: https://github.com/FraxFinance // Primary Author(s) // Travis Moore: https://github.com/FortisFortuna // Reviewer(s) / Contributor(s) // Jason Huan: https://github.com/jasonhuan // Sam Kazemian: https://github.com/samkazemian // Originally inspired by Synthetix.io, but heavily modified by the Frax team (hiIQ portion) // https://raw.githubusercontent.com/Synthetixio/synthetix/develop/contracts/StakingYield.sol import "./TransferHelper.sol"; import "../Lock/IhiIQ.sol"; import "@openzeppelin/contracts/math/Math.sol"; import "@openzeppelin/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; contract HiIQRewards is Ownable, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for ERC20; /* ========== STATE VARIABLES ========== */ // Instances IhiIQ private hiIQ; ERC20 public emittedToken; // Addresses address public emitted_token_address; // Constant for price precision uint256 private constant PRICE_PRECISION = 1e6; // Yield and period related uint256 public periodFinish; uint256 public lastUpdateTime; uint256 public yieldRate; uint256 public yieldDuration = 604800; // 7 * 86400 (7 days) // Yield tracking uint256 public yieldPerHiIQStored = 0; mapping(address => uint256) public userYieldPerTokenPaid; mapping(address => uint256) public yields; // hiIQ tracking uint256 public totalHiIQSupplyStored = 0; mapping(address => bool) public userIsInitialized; mapping(address => uint256) public userHiIQCheckpointed; mapping(address => uint256) public userHiIQEndpointCheckpointed; mapping(address => uint256) private userHiIQLastCheckpointed; mapping(address => uint256) private lastRewardClaimTime; // staker addr -> timestamp // Greylists mapping(address => bool) public greylist; // Admin booleans for emergencies bool public yieldCollectionPaused = false; // For emergencies struct LockedBalance { int128 amount; uint256 end; } /* ========== MODIFIERS ========== */ modifier notYieldCollectionPaused() { require(yieldCollectionPaused == false, "Yield collection is paused"); _; } modifier checkpointUser(address account) { _checkpointUser(account); _; } /* ========== CONSTRUCTOR ========== */ constructor(address _emittedToken, address _hiIQ_address) { emitted_token_address = _emittedToken; emittedToken = ERC20(_emittedToken); hiIQ = IhiIQ(_hiIQ_address); lastUpdateTime = block.timestamp; // 1 IQ a day at initialization yieldRate = (uint256(365e18)).div(365 * 86400); } /* ========== VIEWS ========== */ function lastTimeYieldApplicable() public view returns (uint256) { uint256 currentPeriod = periodFinish; // this is the retroCatchUp calculation. applying it here in case earned is called and many periods have passed without checkpoint if (block.timestamp > periodFinish) { uint256 num_periods_elapsed = uint256(block.timestamp.sub(periodFinish)) / yieldDuration; currentPeriod = periodFinish.add((num_periods_elapsed.add(1)).mul(yieldDuration)); } return Math.min(block.timestamp, currentPeriod); } function yieldPerHiIQ() public view returns (uint256) { if (totalHiIQSupplyStored == 0) { return yieldPerHiIQStored; } else { return ( yieldPerHiIQStored.add( lastTimeYieldApplicable().sub(lastUpdateTime).mul(yieldRate).mul(1e18).div(totalHiIQSupplyStored) ) ); } } function earned(address account) public view returns (uint256) { // Uninitialized users should not earn anything yet if (!userIsInitialized[account]) return 0; uint256 yieldPerHiIQToUse = yieldPerHiIQ().sub(userYieldPerTokenPaid[account]); uint256 user_locking_ending_time = userHiIQEndpointCheckpointed[account]; // Get eligible hiIQ balances uint256 eligible_current_hiiq; if (block.timestamp >= user_locking_ending_time) { eligible_current_hiiq = 0; } else { eligible_current_hiiq = hiIQ.balanceOf(account); } // If your hiIQ is unlocked uint256 eligible_time_fraction = PRICE_PRECISION; if (eligible_current_hiiq == 0) { // And you already claimed after expiration if (lastRewardClaimTime[account] >= user_locking_ending_time) { // You get NOTHING. You LOSE. Good DAY ser! return 0; } else if (userHiIQLastCheckpointed[account] > user_locking_ending_time) { eligible_time_fraction = 0; } else { // You haven't claimed yet // user can checkpoint multiple times and it shouldnt affect this uint256 eligible_time = user_locking_ending_time.sub(lastRewardClaimTime[account]); uint256 total_time = block.timestamp.sub(lastRewardClaimTime[account]); eligible_time_fraction = Math.min(PRICE_PRECISION, PRICE_PRECISION.mul(eligible_time).div(total_time)); } } yieldPerHiIQToUse = yieldPerHiIQToUse.mul(eligible_time_fraction); // If the amount of hiIQ increased, only pay off based on the old balance // Otherwise, take the midpoint uint256 hiiq_balance_to_use; { uint256 old_hiiq_balance = userHiIQCheckpointed[account]; if (eligible_current_hiiq > old_hiiq_balance) { hiiq_balance_to_use = old_hiiq_balance; } else if (user_locking_ending_time < block.timestamp) { // it should not go to zero, use ending point hiIQ and prev checkpoint amount uint256 balanceOf = 0; try hiIQ.balanceOf(account, user_locking_ending_time) returns (uint256 balance) { balanceOf = balance; } catch(bytes memory _err) { } hiiq_balance_to_use = ((balanceOf).add(old_hiiq_balance)).div(2); } else { hiiq_balance_to_use = ((eligible_current_hiiq).add(old_hiiq_balance)).div(2); } } return calculateEarn(account, hiiq_balance_to_use, yieldPerHiIQToUse); } function calculateEarn(address account, uint256 hiiq_balance_to_use, uint256 yieldPerHiIQToUse) internal view returns (uint256) { return hiiq_balance_to_use .mul(yieldPerHiIQToUse) .div(1e18 * PRICE_PRECISION) .add(yields[account]); } function getYieldForDuration() external view returns (uint256) { return (yieldRate.mul(yieldDuration)); } /* ========== MUTATIVE FUNCTIONS ========== */ function _checkpointUser(address account) internal { // Need to retro-adjust some things if the period hasn't been renewed, then start a new one sync(); // Calculate the earnings first _syncEarned(account); IhiIQ.LockedBalance memory curr_locked_bal_pack = hiIQ.locked(account); // Update the user's stored hiIQ balance userHiIQCheckpointed[account] = hiIQ.balanceOf(account); // Update the user's stored ending timestamp userHiIQEndpointCheckpointed[account] = curr_locked_bal_pack.end; // Update the user's stored checkpoint timestamp userHiIQLastCheckpointed[account] = block.timestamp; // Mark the user as initialized if (!userIsInitialized[account]) { userIsInitialized[account] = true; lastRewardClaimTime[account] = block.timestamp; } } function _syncEarned(address account) internal { if (account != address(0)) { uint256 earned0 = earned(account); yields[account] = earned0; userYieldPerTokenPaid[account] = yieldPerHiIQStored; } } // Anyone can checkpoint another user function checkpointOtherUser(address user_addr) external { _checkpointUser(user_addr); } // Checkpoints the user function checkpoint() external { _checkpointUser(msg.sender); } function getYield() external nonReentrant notYieldCollectionPaused checkpointUser(msg.sender) returns (uint256 yield0) { require(greylist[msg.sender] == false, "Address has been greylisted"); yield0 = yields[msg.sender]; if (yield0 > 0) { yields[msg.sender] = 0; TransferHelper.safeTransfer(emitted_token_address, msg.sender, yield0); emit YieldCollected(msg.sender, yield0, emitted_token_address); } lastRewardClaimTime[msg.sender] = block.timestamp; } // If the period expired, renew it function retroCatchUp() internal { // Failsafe check require(block.timestamp > periodFinish, "Period has not expired yet!"); // Ensure the provided yield amount is not more than the balance in the contract. // This keeps the yield rate in the right range, preventing overflows due to // very high values of yieldRate in the earned and yieldPerToken functions; // Yield + leftover must be less than 2^256 / 10^18 to avoid overflow. uint256 num_periods_elapsed = uint256(block.timestamp.sub(periodFinish)) / yieldDuration; // Floor division to the nearest period uint256 balance0 = emittedToken.balanceOf(address(this)); require( yieldRate.mul(yieldDuration).mul(num_periods_elapsed + 1) <= balance0, "Not enough emittedToken available for yield distribution!" ); periodFinish = periodFinish.add((num_periods_elapsed.add(1)).mul(yieldDuration)); uint256 yield0 = yieldPerHiIQ(); yieldPerHiIQStored = yield0; lastUpdateTime = lastTimeYieldApplicable(); emit YieldPeriodRenewed(emitted_token_address, yieldRate); } function sync() public { // Update the total hiIQ supply totalHiIQSupplyStored = hiIQ.totalSupply(); if (block.timestamp > periodFinish) { retroCatchUp(); } else { uint256 yield0 = yieldPerHiIQ(); yieldPerHiIQStored = yield0; lastUpdateTime = lastTimeYieldApplicable(); } } /* ========== RESTRICTED FUNCTIONS ========== */ // Added to support recovering LP Yield and other mistaken tokens from other systems to be distributed to holders function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner { // Only the owner address can ever receive the recovery withdrawal TransferHelper.safeTransfer(tokenAddress, owner(), tokenAmount); emit RecoveredERC20(tokenAddress, tokenAmount); } function setYieldDuration(uint256 _yieldDuration) external onlyOwner { require( periodFinish == 0 || block.timestamp > periodFinish, "Previous yield period must be complete before changing the duration for the new period" ); yieldDuration = _yieldDuration; emit YieldDurationUpdated(yieldDuration); } function initializeDefault() external onlyOwner { lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(yieldDuration); totalHiIQSupplyStored = hiIQ.totalSupply(); emit DefaultInitialization(); } function greylistAddress(address _address) external onlyOwner { greylist[_address] = !(greylist[_address]); } function setPauses(bool _yieldCollectionPaused) external onlyOwner { yieldCollectionPaused = _yieldCollectionPaused; } function setYieldRate(uint256 _new_rate0, bool sync_too) external onlyOwner { yieldRate = _new_rate0; if (sync_too) { sync(); } } /* ========== EVENTS ========== */ event YieldCollected(address indexed user, uint256 yield, address token_address); event YieldDurationUpdated(uint256 newDuration); event RecoveredERC20(address token, uint256 amount); event YieldPeriodRenewed(address token, uint256 yieldRate); event DefaultInitialization(); }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /* * @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 ^0.7.0; 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 () { 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 ^0.7.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @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 ^0.7.0; 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) { _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 ^0.7.0; /** * @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 ^0.7.0; 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 ^0.7.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @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 ^0.7.0; /** * @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 () { _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: AGPL-3.0 pragma solidity 0.7.1; pragma experimental ABIEncoderV2; interface IhiIQ { struct LockedBalance { int128 amount; uint256 end; } /* ========== VIEWS ========== */ function balanceOf(address addr) external view returns (uint256); function balanceOf(address addr, uint256 _t) external view returns (uint256); function balanceOfAt(address addr, uint256 _block) external returns (uint256); function totalSupply() external view returns (uint256); function totalSupply(uint256 t) external view returns (uint256); function totalSupplyAt(uint256 _block) external returns (uint256); function totalIQSupply() external view returns (uint256); function totalIQSupplyAt(uint256 _block) external view returns (uint256); function locked(address addr) external view returns (LockedBalance memory); /* ========== PUBLIC FUNCTIONS ========== */ function checkpoint() external; }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.7.1; // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: APPROVE_FAILED"); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FAILED"); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FROM_FAILED"); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, "TransferHelper: ETH_TRANSFER_FAILED"); } }
{ "evmVersion": "istanbul", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 1000 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000579cea1889991f68acc35ff5c3dd0621ff29b0c90000000000000000000000001bf5457ecaa14ff63cc89efd560e251e814e16ba
-----Decoded View---------------
Arg [0] : _emittedToken (address): 0x579CEa1889991f68aCc35Ff5c3dd0621fF29b0C9
Arg [1] : _hiIQ_address (address): 0x1bF5457eCAa14Ff63CC89EFd560E251e814E16Ba
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000579cea1889991f68acc35ff5c3dd0621ff29b0c9
Arg [1] : 0000000000000000000000001bf5457ecaa14ff63cc89efd560e251e814e16ba
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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.