Address Details
contract
0x78674FA1bE6380d97f4e7064A4DcEC7dCC04ce4c
- Contract Name
- PlastikStaking
- Creator
- 0x00ccaf–f0f31f at 0x115150–7ea825
- Balance
- 0 CELO ( )
- Locked CELO Balance
- 0.00 CELO
- Voting CELO Balance
- 0.00 CELO
- Pending Unlocked Gold
- 0.00 CELO
- Tokens
-
Fetching tokens...
- Transactions
- 1,337 Transactions
- Transfers
- 761 Transfers
- Gas Used
- 134,344,204
- Last Balance Update
- 19610670
Transactions
Token Transfers
Tokens
Internal Transactions
Coin Balance History
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Code
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- Contract name:
- PlastikStaking
- Optimization enabled
- true
- Compiler version
- v0.8.6+commit.11564f7e
- Optimization runs
- 100
- EVM Version
- berlin
- Verified at
- 2023-05-29T17:25:27.006654Z
contracts/Staking.sol
//SPDX-License-Identifier: Unlicense pragma solidity ^0.8.0; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; contract PlastikStaking is Ownable, ReentrancyGuard { using SafeMath for uint256; using SafeMath for uint128; using SafeMath for uint64; using SafeERC20 for IERC20; /* ========== STATE VARIABLES ========== */ IERC20 plastik; bool public hasUserLimit; // Whether a limit is set for users bool public isInitialized; // Whether it is initialized uint256 public accTokenPerShare; // Accrued token per share uint256 public bonusEndBlock; // The block number when Plasktik mining ends. uint256 public startBlock; // The block number when Plasktik mining starts. uint256 public lastRewardBlock; // The block number of the last pool update uint256 public poolLimitPerUser; // The pool limit (0 if none) uint256 public rewardPerBlock; // Plasktik tokens created per block. uint256 public PRECISION_FACTOR; // The precision factor uint256 private _totalStake; uint256 private _totalStakeLongterm; uint256 private _totalAll; // total stake of flexible and longterm uint128 public constant SECONDS_IN_YEAR = 365 days; address public rewardDistributionAddress; mapping (address => UserInfo) public userInfo; // Info of each user that stakes tokens (stakedToken) mapping (uint256 => mapping (address => UserInfoLongTerm)) public userInfoLongTerm; // Info of each user that stakes tokens in each pool mapping (address => bool) public admin; // Admin of Contract struct UserInfo { uint256 amount; // How many staked tokens the user has provided uint256 rewardDebt; // Reward debt uint256 totalRewardEarned; } struct UserInfoLongTerm { uint256 amount; // How many staked tokens the user has provided uint128 timeStake; // Last action time of user uint128 endtime; uint256 totalRewardEarned; bool staked; } // Info of each pool. struct PoolInfo { uint256 minDeposit; // minimun amount that can be deposit uint256 maxDeposit; // maximun amount that can be deposit uint256 limitStaking; // max slot can stake uint256 currentStaking; uint128 period; // period of pool uint128 stopDay; // the day close pool uint64 APR; // APR of pool : 5000 = 50% bool status; // status of pool } // Info of each pool. PoolInfo[] public poolInfo; // Long Term event DepositLongTerm(uint256 _pid, uint256 amount); event WithdrawLongTerm(uint256 _pid, uint256 amount, uint256 pending); event ClaimLongTerm(uint256 _pid, uint256 pending); event RemoveAdmin(address user); event AddAdmin(address user); event ChangeToken(address token); event AddPool(uint256 id, uint256 _minDeposit, uint256 _maxDeposit, uint256 _currentStaking, uint256 _limitStaking, uint64 _APR, uint128 _period); event ClosePool(uint _pid, uint128 _stopDay); event UpdatePool(uint256 _pid, uint256 _minDeposit ,uint256 _currentStaking, uint256 _limitStaking, bool _status); // Flex event AdminTokenRecovery(address tokenRecovered, uint256 amount); event Deposit(uint256 amount, uint256 pendingFlex); event EmergencyWithdraw(uint256 amount); event NewStartAndEndBlocks(uint256 startBlock, uint256 endBlock); event NewRewardPerBlock(uint256 rewardPerBlock); event NewPoolLimit(uint256 poolLimitPerUser); event RewardsStop(uint256 blockNumber); event Withdraw(uint256 amount, uint256 pendingFlex); /* ========== CONSTRUCTOR ========== */ constructor(address _rewardDistributionAddress, address _token) { plastik = IERC20(_token); rewardDistributionAddress = _rewardDistributionAddress; admin[msg.sender] = true; } function removeAdmin(address _RemoveAdmin) external onlyOwner { admin[_RemoveAdmin] = false; emit RemoveAdmin(_RemoveAdmin); } function addAdmin(address _AddAdmin) external onlyOwner { admin[_AddAdmin] = true; emit AddAdmin(_AddAdmin); } function changeToken(address _token) external onlyOwner { plastik = IERC20(_token); emit ChangeToken(_token); } /** * @notice Init flexible pool, * @param _rewardPerBlock: amount of reward paid per block * @param _startBlock: The first block will pay the reward * @param _bonusEndBlock: The last block pays off * @param _poolLimitPerUser: limit the number of tokens users can stake in the pool flexible, 0 mean no limit */ function initialize(uint256 _rewardPerBlock, uint256 _startBlock, uint256 _bonusEndBlock, uint256 _poolLimitPerUser) external onlySystemAdmin { require(!isInitialized, "Already initialized"); // Make this contract initialized isInitialized = true; rewardPerBlock = _rewardPerBlock; startBlock = _startBlock; bonusEndBlock = _bonusEndBlock; if (_poolLimitPerUser > 0) { hasUserLimit = true; poolLimitPerUser = _poolLimitPerUser; } uint256 decimalsRewardToken = uint256(9); require(decimalsRewardToken < 30, "Must be inferior to 30"); PRECISION_FACTOR = uint256(10**(uint256(30).sub(decimalsRewardToken))); // Set the lastRewardBlock as the startBlock lastRewardBlock = startBlock; } /** Flex * @notice Create Pool Longterm * @param _minDeposit: The minimum amount that the user has to deposit * @param _maxDeposit: the maximum amount that the user has to deposit * @param _limitStaking: limit the number of tokens that can be deposit * @param _APR: APR of pool 10000 -> 100% * @param _period: staking time of the package in seconds */ function addPool(uint256 _minDeposit, uint256 _maxDeposit, uint256 _limitStaking, uint64 _APR, uint128 _period) external onlySystemAdmin { poolInfo.push(PoolInfo({ minDeposit: _minDeposit, maxDeposit: _maxDeposit, limitStaking: _limitStaking, APR: _APR, period: _period, status: true, currentStaking: uint256(0), stopDay: uint128(0) })); uint256 _id = poolInfo.length.sub(1); emit AddPool(_id, _minDeposit, _maxDeposit, uint256(0), _limitStaking, _APR, _period); } function closePool(uint256 _pid) external onlySystemAdmin { PoolInfo storage pool = poolInfo[_pid]; require(pool.status == true, "This Pool is closed"); pool.status = false; pool.stopDay = uint128(block.timestamp); emit ClosePool(_pid, pool.stopDay); } /* ========== VIEWS ========== */ // return total stake of flexible function totalFlexibleStaked() public view returns(uint256) { return _totalStake; } // return total stake of each pool function totalLongTermStaked(uint256 _pid) external view returns(uint256) { return poolInfo[_pid].currentStaking; } // return total stake of Longterm and Flexible function totalStakeAllPool() external view returns(uint256) { return _totalAll; } function systemAdmin(address _account) external view returns(bool) { return admin[_account]; } function earned(uint256 _pid, address _user) public view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfoLongTerm storage user = userInfoLongTerm[_pid][_user]; uint128 endUserStakedTime = uint128(block.timestamp.sub(user.timeStake)); if (uint128(block.timestamp) >= user.timeStake.add(pool.period)) { endUserStakedTime = pool.period; if ((pool.stopDay <= user.timeStake.add(pool.period)) && (pool.status == false)) { endUserStakedTime = uint128(pool.stopDay.sub(user.timeStake)); return ((((endUserStakedTime).mul(user.amount)).mul(pool.APR)).div(SECONDS_IN_YEAR)).div(10000); } return ((((endUserStakedTime).mul(user.amount)).mul(pool.APR)).div(SECONDS_IN_YEAR)).div(10000); } else { if (pool.status == false) { endUserStakedTime = uint128(pool.stopDay.sub(user.timeStake)); return ((((endUserStakedTime).mul(user.amount)).mul(pool.APR)).div(SECONDS_IN_YEAR)).div(10000); } } return ((((endUserStakedTime).mul(user.amount)).mul(pool.APR)).div(SECONDS_IN_YEAR)).div(10000); } /* ========== FUNCTION ========== */ /** * @notice Deposit staked tokens and collect reward tokens (if any) * @param _amount: amount to withdraw (in rewardToken) */ function deposit(uint256 _amount) external nonReentrant { UserInfo storage user = userInfo[msg.sender]; if (hasUserLimit) { require(_amount.add(user.amount) <= poolLimitPerUser, "User amount above limit"); } _updatePool(); uint256 pending; if (user.amount > 0) { pending = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt); if (pending > 0) { plastik.safeTransferFrom(address(rewardDistributionAddress), address(msg.sender), pending); } } if (_amount > 0) { user.amount = user.amount.add(_amount); plastik.safeTransferFrom(address(msg.sender), address(this), _amount); } user.totalRewardEarned = user.totalRewardEarned.add(pending); user.rewardDebt = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR); _totalStake = _totalStake.add(_amount); _totalAll = _totalAll.add(_amount); emit Deposit(_amount, pending); } /** * @notice Deposit staked tokens and collect reward tokens (if any) * @param _amount: amount to withdraw (in rewardToken) * @param _pid: id of long term pool */ function depositLongTerm(uint256 _pid, uint256 _amount) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfoLongTerm storage user = userInfoLongTerm[_pid][msg.sender]; uint256 ftAmount = user.amount.add(_amount); require(pool.status, "This pool is close"); require(user.staked == false, "You are Staking"); require(_amount > 0, "Invalid Amount"); require(ftAmount >= pool.minDeposit && ftAmount <= pool.maxDeposit, "Invalid Amount"); require(pool.currentStaking.add(_amount) <= pool.limitStaking, "Full"); plastik.safeTransferFrom(address(msg.sender), address(this), _amount); user.amount = user.amount.add(_amount); user.timeStake = uint128(block.timestamp); user.endtime = uint128(user.timeStake.add(poolInfo[_pid].period)); user.staked = true; pool.currentStaking = pool.currentStaking.add(_amount); _totalAll = _totalAll.add(_amount); emit UpdatePool(_pid, pool.minDeposit, pool.currentStaking, pool.limitStaking, pool.status); emit DepositLongTerm(_pid, _amount); } /** * @notice Withdraw staked tokens and collect reward tokens * @param _amount: amount to withdraw (in rewardToken) */ function withdraw(uint256 _amount) external nonReentrant { UserInfo storage user = userInfo[msg.sender]; require(user.amount >= _amount, "Amount to withdraw too high"); _updatePool(); uint256 pending = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt); if (_amount > 0) { user.amount = user.amount.sub(_amount); plastik.safeTransfer(address(msg.sender), _amount); } if (pending > 0) { plastik.safeTransferFrom(address(rewardDistributionAddress), address(msg.sender), pending); } user.totalRewardEarned = user.totalRewardEarned.add(pending); user.rewardDebt = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR); _totalStake = _totalStake.sub(_amount); _totalAll = _totalAll.sub(_amount); emit Withdraw(_amount, pending); } /** * @notice Withdraw staked tokens and collect reward tokens * @param _pid: id of long term pool */ function withdrawLongTerm(uint256 _pid) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfoLongTerm storage user = userInfoLongTerm[_pid][msg.sender]; uint128 userTimeStake = uint128((uint128(block.timestamp)).sub(user.timeStake)); uint256 pending; if (pool.status == true) { if (userTimeStake >= pool.period) { pending = earned(_pid, msg.sender); plastik.safeTransferFrom(address(rewardDistributionAddress), address(msg.sender), pending); } } else { pending = earned(_pid, msg.sender); plastik.safeTransferFrom(address(rewardDistributionAddress), address(msg.sender), pending); } if (pending == 0) { pool.currentStaking = pool.currentStaking.sub(user.amount); } else { pool.limitStaking = pool.limitStaking.sub(user.amount); pool.currentStaking = pool.currentStaking.sub(user.amount); emit ClaimLongTerm(_pid, pending); } plastik.safeTransfer(address(msg.sender), user.amount); uint256 withdrawAmount = user.amount; user.staked = false; user.amount = user.amount.sub(user.amount); user.totalRewardEarned = user.totalRewardEarned.add(pending); _totalAll = _totalAll.sub(user.amount); emit UpdatePool(_pid, pool.minDeposit, pool.currentStaking, pool.limitStaking, pool.status); emit WithdrawLongTerm(_pid, withdrawAmount, pending); } /** * @notice Withdraw staked tokens without caring about rewards rewards * @dev Needs to be for emergency. */ function emergencyWithdraw() external nonReentrant { UserInfo storage user = userInfo[msg.sender]; uint256 amountToTransfer = user.amount; user.amount = 0; user.rewardDebt = 0; if (amountToTransfer > 0) { plastik.safeTransfer(address(msg.sender), amountToTransfer); } emit EmergencyWithdraw(user.amount); } /** * @notice Stop rewards * @dev Only callable by owner. Needs to be for emergency. */ function emergencyRewardWithdraw(uint256 _amount) external onlySystemAdmin { plastik.safeTransfer(address(msg.sender), _amount); } /** * @notice It allows the admin to recover wrong tokens sent to the contract * @param _tokenAddress: the address of the token to withdraw * @param _tokenAmount: the number of tokens to withdraw * @dev This function is only callable by admin. */ function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlySystemAdmin { require(_tokenAddress != address(plastik), "Cannot be staked/reward token"); IERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount); emit AdminTokenRecovery(_tokenAddress, _tokenAmount); } /** * @notice Stop rewards * @dev Only callable by owner */ function stopReward() external onlySystemAdmin { bonusEndBlock = block.number; } /** * @notice Update pool limit per user * @dev Only callable by owner. * @param _hasUserLimit: whether the limit remains forced * @param _poolLimitPerUser: new pool limit per user */ function updatePoolLimitPerUser(bool _hasUserLimit, uint256 _poolLimitPerUser) external onlySystemAdmin { //require(hasUserLimit, "Must be set"); if (_hasUserLimit) { require(_poolLimitPerUser > poolLimitPerUser, "New limit must be higher"); poolLimitPerUser = _poolLimitPerUser; hasUserLimit = _hasUserLimit; } else { hasUserLimit = _hasUserLimit; poolLimitPerUser = 0; } emit NewPoolLimit(poolLimitPerUser); } /** * @notice Update reward per block * @dev Only callable by owner. * @param _rewardPerBlock: the reward per block */ function updateRewardPerBlock(uint256 _rewardPerBlock) external onlySystemAdmin { //require(block.number < startBlock, "Pool has started"); _updatePool(); rewardPerBlock = _rewardPerBlock; emit NewRewardPerBlock(_rewardPerBlock); } /** * @notice It allows the admin to update start and end blocks * @dev This function is only callable by owner. * @param _startBlock: the new start block * @param _bonusEndBlock: the new end block */ function updateStartAndEndBlocks(uint256 _startBlock, uint256 _bonusEndBlock) external onlySystemAdmin { //require(block.number < startBlock, "Pool has started"); require(_startBlock < _bonusEndBlock, "New startBlock must be lower than new endBlock"); require(block.number < _startBlock, "New startBlock must be higher than current block"); startBlock = _startBlock; bonusEndBlock = _bonusEndBlock; // Set the lastRewardBlock as the startBlock lastRewardBlock = startBlock; emit NewStartAndEndBlocks(_startBlock, _bonusEndBlock); } /** * @notice View function to see pending reward on frontend. * @param _user: user address * @return Pending reward for a given user */ function pendingReward(address _user) external view returns (uint256) { UserInfo storage user = userInfo[_user]; uint256 stakedTokenSupply = totalFlexibleStaked(); if (block.number > lastRewardBlock && stakedTokenSupply != 0) { uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 plastikReward = multiplier.mul(rewardPerBlock); uint256 adjustedTokenPerShare = accTokenPerShare.add(plastikReward.mul(PRECISION_FACTOR).div(stakedTokenSupply)); return user.amount.mul(adjustedTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt); } else { return user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt); } } /** * @notice Update reward variables of the given pool to be up-to-date. */ function _updatePool() internal { if (block.number <= lastRewardBlock) { return; } uint256 stakedTokenSupply = totalFlexibleStaked(); if (stakedTokenSupply == 0) { lastRewardBlock = block.number; return; } uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 plastikReward = multiplier.mul(rewardPerBlock); accTokenPerShare = accTokenPerShare.add(plastikReward.mul(PRECISION_FACTOR).div(stakedTokenSupply)); lastRewardBlock = block.number; } /** * @notice Return reward multiplier over the given _from to _to block. * @param _from: block to start * @param _to: block to finish */ function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) { if (_to <= bonusEndBlock) { return _to.sub(_from); } else if (_from >= bonusEndBlock) { return 0; } else { return bonusEndBlock.sub(_from); } } /* ========== MODIFIERS ========== */ modifier onlySystemAdmin() { require(admin[msg.sender] == true, "Caller is not admin"); _; } }
/_openzeppelin/contracts/access/Ownable.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/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. */ abstract 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() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual 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 { _transferOwnership(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"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
/_openzeppelin/contracts/security/ReentrancyGuard.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @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]. */ abstract 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 making 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; } }
/_openzeppelin/contracts/token/ERC20/ERC20.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.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 Contracts guidelines: functions revert * instead 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, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override 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 this function is * overridden; * * 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 virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, 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}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, 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}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); 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) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + 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) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This 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: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, 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: * * - `account` 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 += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(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); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(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 Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @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 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 {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
/_openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount ) external returns (bool); }
/_openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
/_openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.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 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' 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) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _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 require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
/_openzeppelin/contracts/utils/Address.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 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"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
/_openzeppelin/contracts/utils/Context.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @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 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) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
/_openzeppelin/contracts/utils/math/Math.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @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. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a / b + (a % b == 0 ? 0 : 1); } }
/_openzeppelin/contracts/utils/math/SafeMath.sol
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // 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 (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @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) { return a + b; } /** * @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 a - b; } /** * @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) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting 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 a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting 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) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * 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) { unchecked { require(b > 0, errorMessage); return a % b; } } }
Contract ABI
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address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addPool","inputs":[{"type":"uint256","name":"_minDeposit","internalType":"uint256"},{"type":"uint256","name":"_maxDeposit","internalType":"uint256"},{"type":"uint256","name":"_limitStaking","internalType":"uint256"},{"type":"uint64","name":"_APR","internalType":"uint64"},{"type":"uint128","name":"_period","internalType":"uint128"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"admin","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"bonusEndBlock","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"changeToken","inputs":[{"type":"address","name":"_token","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"closePool","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"deposit","inputs":[{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"depositLongTerm","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"earned","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyRewardWithdraw","inputs":[{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyWithdraw","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"hasUserLimit","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[{"type":"uint256","name":"_rewardPerBlock","internalType":"uint256"},{"type":"uint256","name":"_startBlock","internalType":"uint256"},{"type":"uint256","name":"_bonusEndBlock","internalType":"uint256"},{"type":"uint256","name":"_poolLimitPerUser","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isInitialized","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastRewardBlock","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"pendingReward","inputs":[{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"minDeposit","internalType":"uint256"},{"type":"uint256","name":"maxDeposit","internalType":"uint256"},{"type":"uint256","name":"limitStaking","internalType":"uint256"},{"type":"uint256","name":"currentStaking","internalType":"uint256"},{"type":"uint128","name":"period","internalType":"uint128"},{"type":"uint128","name":"stopDay","internalType":"uint128"},{"type":"uint64","name":"APR","internalType":"uint64"},{"type":"bool","name":"status","internalType":"bool"}],"name":"poolInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"poolLimitPerUser","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"recoverWrongTokens","inputs":[{"type":"address","name":"_tokenAddress","internalType":"address"},{"type":"uint256","name":"_tokenAmount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeAdmin","inputs":[{"type":"address","name":"_RemoveAdmin","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"rewardDistributionAddress","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"rewardPerBlock","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"startBlock","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"stopReward","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","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