Overview
ETH Balance
0.0316925 ETH
Eth Value
$103.53 (@ $3,266.64/ETH)More Info
Private Name Tags
ContractCreator
Latest 25 from a total of 911 transactions
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Latest 25 internal transactions (View All)
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Contract Name:
FeeManagement
Compiler Version
v0.8.11+commit.d7f03943
Optimization Enabled:
Yes with 100 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import './TokenSplitter.sol'; import './FeeSharingSetter.sol'; import './IWETH.sol'; import '@openzeppelin/contracts/access/AccessControl.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/security/Pausable.sol'; import '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import '@openzeppelin/contracts/utils/Address.sol'; contract FeeManagement is AccessControl, Pausable, ReentrancyGuard { using SafeERC20 for IERC20; using SafeERC20 for IWETH; bytes32 public constant OPERATOR_ROLE = keccak256('OPERATOR_ROLE'); TokenSplitter public immutable tokenSplitter; FeeSharingSetter public immutable feeSetter; IWETH public immutable weth; constructor( TokenSplitter tokenSplitter_, FeeSharingSetter feeSetter_, IWETH weth_, address operator_, address admin_ ) { tokenSplitter = tokenSplitter_; feeSetter = feeSetter_; weth = weth_; if (admin_ == address(0)) { admin_ = msg.sender; } _grantRole(DEFAULT_ADMIN_ROLE, admin_); _grantRole(OPERATOR_ROLE, admin_); if (operator_ != address(0)) { _grantRole(OPERATOR_ROLE, operator_); } } receive() external payable {} function pause() external onlyRole(DEFAULT_ADMIN_ROLE) { _pause(); } function unpause() external onlyRole(DEFAULT_ADMIN_ROLE) { _unpause(); } // withdraw tokens function withdraw(address to, IERC20[] calldata tokens) external nonReentrant whenNotPaused onlyRole(DEFAULT_ADMIN_ROLE) { require(to != address(0), 'Withdraw: address(0) cannot be recipient'); for (uint256 i = 0; i < tokens.length; i++) { IERC20 currency = tokens[i]; if (address(currency) == address(0)) { uint256 balance = address(this).balance; if (balance > 0) { Address.sendValue(payable(to), balance); } } else { uint256 balance = currency.balanceOf(address(this)); if (balance > 0) { currency.safeTransfer(to, balance); } } } } function canRelease() external view returns (bool) { return block.number > feeSetter.rewardDurationInBlocks() + feeSetter.lastRewardDistributionBlock(); } function releaseAndUpdateReward(IERC20[] memory tokens, address[] memory accounts) external nonReentrant whenNotPaused onlyRole(OPERATOR_ROLE) { _release(tokens); // release x2y2 to pools, skipped when the balance is less than 1 token (the release can be called by anyone) if (tokenSplitter.x2y2Token().balanceOf(address(tokenSplitter)) >= 1 ether) { for (uint256 i = 0; i < accounts.length; i++) { tokenSplitter.releaseTokens(accounts[i]); } } feeSetter.updateRewards(); } function release(IERC20[] memory tokens) external nonReentrant whenNotPaused onlyRole(OPERATOR_ROLE) { _release(tokens); } function _release(IERC20[] memory tokens) internal { uint256 balance = address(this).balance; if (balance > 0) { weth.deposit{value: balance}(); } balance = weth.balanceOf(address(this)); if (balance > 0) { weth.safeTransfer(address(feeSetter), balance); } for (uint256 i = 0; i < tokens.length; i++) { IERC20 currency = tokens[i]; balance = currency.balanceOf(address(this)); if (balance > 0) { currency.safeTransfer(address(feeSetter), balance); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {Ownable} from '@openzeppelin/contracts/access/Ownable.sol'; import {ReentrancyGuard} from '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import {IERC20, SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; /** * @title TokenSplitter * @notice It splits X2Y2 to team/treasury/trading volume reward accounts based on shares. */ contract TokenSplitter is Ownable, ReentrancyGuard { using SafeERC20 for IERC20; struct AccountInfo { uint256 shares; uint256 tokensDistributedToAccount; } uint256 public immutable TOTAL_SHARES; IERC20 public immutable x2y2Token; // Total tokens distributed across all accounts uint256 public totalTokensDistributed; mapping(address => AccountInfo) public accountInfo; event NewSharesOwner(address indexed oldRecipient, address indexed newRecipient); event TokensTransferred(address indexed account, uint256 amount); /** * @notice Constructor * @param _accounts array of accounts addresses * @param _shares array of shares per account * @param _x2y2Token address of the X2Y2 token */ constructor( address[] memory _accounts, uint256[] memory _shares, address _x2y2Token ) { require(_accounts.length == _shares.length, 'Splitter: Length differ'); require(_accounts.length > 0, 'Splitter: Length must be > 0'); uint256 currentShares; for (uint256 i = 0; i < _accounts.length; i++) { require(_shares[i] > 0, 'Splitter: Shares are 0'); currentShares += _shares[i]; accountInfo[_accounts[i]].shares = _shares[i]; } TOTAL_SHARES = currentShares; x2y2Token = IERC20(_x2y2Token); } /** * @notice Release X2Y2 tokens to the account * @param account address of the account */ function releaseTokens(address account) external nonReentrant { require(accountInfo[account].shares > 0, 'Splitter: Account has no share'); // Calculate amount to transfer to the account uint256 totalTokensReceived = x2y2Token.balanceOf(address(this)) + totalTokensDistributed; uint256 pendingRewards = ((totalTokensReceived * accountInfo[account].shares) / TOTAL_SHARES) - accountInfo[account].tokensDistributedToAccount; // Revert if equal to 0 require(pendingRewards != 0, 'Splitter: Nothing to transfer'); accountInfo[account].tokensDistributedToAccount += pendingRewards; totalTokensDistributed += pendingRewards; // Transfer funds to account x2y2Token.safeTransfer(account, pendingRewards); emit TokensTransferred(account, pendingRewards); } /** * @notice Update share recipient * @param _newRecipient address of the new recipient * @param _currentRecipient address of the current recipient */ function updateSharesOwner(address _newRecipient, address _currentRecipient) external onlyOwner { require( accountInfo[_currentRecipient].shares > 0, 'Owner: Current recipient has no shares' ); require(accountInfo[_newRecipient].shares == 0, 'Owner: New recipient has existing shares'); // Copy shares to new recipient accountInfo[_newRecipient].shares = accountInfo[_currentRecipient].shares; accountInfo[_newRecipient].tokensDistributedToAccount = accountInfo[_currentRecipient] .tokensDistributedToAccount; // Reset existing shares accountInfo[_currentRecipient].shares = 0; accountInfo[_currentRecipient].tokensDistributedToAccount = 0; emit NewSharesOwner(_currentRecipient, _newRecipient); } /** * @notice Retrieve amount of X2Y2 tokens that can be transferred * @param account address of the account */ function calculatePendingRewards(address account) external view returns (uint256) { if (accountInfo[account].shares == 0) { return 0; } uint256 totalTokensReceived = x2y2Token.balanceOf(address(this)) + totalTokensDistributed; uint256 pendingRewards = ((totalTokensReceived * accountInfo[account].shares) / TOTAL_SHARES) - accountInfo[account].tokensDistributedToAccount; return pendingRewards; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {AccessControl} from '@openzeppelin/contracts/access/AccessControl.sol'; import {ReentrancyGuard} from '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import {IERC20, SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import {EnumerableSet} from '@openzeppelin/contracts/utils/structs/EnumerableSet.sol'; import {FeeSharingSystem} from './FeeSharingSystem.sol'; import {TokenDistributor} from './TokenDistributor.sol'; import {IRewardConvertor} from './IRewardConvertor.sol'; import {IMintableERC20} from './IMintableERC20.sol'; import {ITokenStaked} from './ITokenStaked.sol'; /** * @title FeeSharingSetter * @notice It receives exchange fees and owns the FeeSharingSystem contract. * It can plug to AMMs for converting all received currencies to WETH. */ contract FeeSharingSetter is ReentrancyGuard, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; using SafeERC20 for IERC20; // Operator role bytes32 public constant OPERATOR_ROLE = keccak256('OPERATOR_ROLE'); // Min duration for each fee-sharing period (in blocks) uint256 public immutable MIN_REWARD_DURATION_IN_BLOCKS; // Max duration for each fee-sharing period (in blocks) uint256 public immutable MAX_REWARD_DURATION_IN_BLOCKS; IERC20 public immutable x2y2Token; IERC20 public immutable rewardToken; FeeSharingSystem public feeSharingSystem; TokenDistributor public immutable tokenDistributor; // Reward convertor (tool to convert other currencies to rewardToken) IRewardConvertor public rewardConvertor; // Last reward block of distribution uint256 public lastRewardDistributionBlock; // Next reward duration in blocks uint256 public nextRewardDurationInBlocks; // Reward duration in blocks uint256 public rewardDurationInBlocks; // Set of addresses that are staking only the fee sharing EnumerableSet.AddressSet private _feeStakingAddresses; mapping(address => bool) public feeStakingAddressIStaked; event ConversionToRewardToken( address indexed token, uint256 amountConverted, uint256 amountReceived ); event FeeStakingAddressesAdded(address[] feeStakingAddresses); event FeeStakingAddressesRemoved(address[] feeStakingAddresses); event NewRewardDurationInBlocks(uint256 rewardDurationInBlocks); event NewRewardConvertor(address rewardConvertor); /** * @notice Constructor * @param _feeSharingSystem address of the fee sharing system * @param _minRewardDurationInBlocks minimum reward duration in blocks * @param _maxRewardDurationInBlocks maximum reward duration in blocks * @param _rewardDurationInBlocks reward duration between two updates in blocks */ constructor( address _feeSharingSystem, uint256 _minRewardDurationInBlocks, uint256 _maxRewardDurationInBlocks, uint256 _rewardDurationInBlocks ) { require( (_rewardDurationInBlocks <= _maxRewardDurationInBlocks) && (_rewardDurationInBlocks >= _minRewardDurationInBlocks), 'Owner: Reward duration in blocks outside of range' ); MIN_REWARD_DURATION_IN_BLOCKS = _minRewardDurationInBlocks; MAX_REWARD_DURATION_IN_BLOCKS = _maxRewardDurationInBlocks; feeSharingSystem = FeeSharingSystem(_feeSharingSystem); rewardToken = feeSharingSystem.rewardToken(); x2y2Token = feeSharingSystem.x2y2Token(); tokenDistributor = feeSharingSystem.tokenDistributor(); rewardDurationInBlocks = _rewardDurationInBlocks; nextRewardDurationInBlocks = _rewardDurationInBlocks; _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); } /** * @notice Update the reward per block (in rewardToken) * @dev It automatically retrieves the number of pending WETH and adjusts * based on the balance of X2Y2 in fee-staking addresses that exist in the set. */ function updateRewards() external onlyRole(OPERATOR_ROLE) { if (lastRewardDistributionBlock > 0) { require( block.number > (rewardDurationInBlocks + lastRewardDistributionBlock), 'Reward: Too early to add' ); } // Adjust for this period if (rewardDurationInBlocks != nextRewardDurationInBlocks) { rewardDurationInBlocks = nextRewardDurationInBlocks; } lastRewardDistributionBlock = block.number; // Calculate the reward to distribute as the balance held by this address uint256 reward = rewardToken.balanceOf(address(this)); require(reward != 0, 'Reward: Nothing to distribute'); // Check if there is any address eligible for fee-sharing only uint256 numberAddressesForFeeStaking = _feeStakingAddresses.length(); // If there are eligible addresses for fee-sharing only, calculate their shares if (numberAddressesForFeeStaking > 0) { uint256[] memory x2y2Balances = new uint256[](numberAddressesForFeeStaking); (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(feeSharingSystem)); for (uint256 i = 0; i < numberAddressesForFeeStaking; i++) { address a = _feeStakingAddresses.at(i); uint256 balance = x2y2Token.balanceOf(a); if (feeStakingAddressIStaked[a]) { balance = ITokenStaked(a).getTotalStaked(); } totalAmountStaked += balance; x2y2Balances[i] = balance; } // Only apply the logic if the totalAmountStaked > 0 (to prevent division by 0) if (totalAmountStaked > 0) { uint256 adjustedReward = reward; for (uint256 i = 0; i < numberAddressesForFeeStaking; i++) { uint256 amountToTransfer = (x2y2Balances[i] * reward) / totalAmountStaked; if (amountToTransfer > 0) { adjustedReward -= amountToTransfer; rewardToken.safeTransfer(_feeStakingAddresses.at(i), amountToTransfer); } } // Adjust reward accordingly reward = adjustedReward; } } // Transfer tokens to fee sharing system rewardToken.safeTransfer(address(feeSharingSystem), reward); // Update rewards feeSharingSystem.updateRewards(reward, rewardDurationInBlocks); } /** * @notice Convert currencies to reward token * @dev Function only usable only for whitelisted currencies (where no potential side effect) * @param token address of the token to sell * @param additionalData additional data (e.g., slippage) */ function convertCurrencyToRewardToken(address token, bytes calldata additionalData) external nonReentrant onlyRole(OPERATOR_ROLE) { require(address(rewardConvertor) != address(0), 'Convert: RewardConvertor not set'); require(token != address(rewardToken), 'Convert: Cannot be reward token'); uint256 amountToConvert = IERC20(token).balanceOf(address(this)); require(amountToConvert != 0, 'Convert: Amount to convert must be > 0'); // Adjust allowance for this transaction only IERC20(token).safeIncreaseAllowance(address(rewardConvertor), amountToConvert); // Exchange token to reward token uint256 amountReceived = rewardConvertor.convert( token, address(rewardToken), amountToConvert, additionalData ); emit ConversionToRewardToken(token, amountToConvert, amountReceived); } /** * @notice Add staking addresses * @param _stakingAddresses array of addresses eligible for fee-sharing only */ function addFeeStakingAddresses( address[] calldata _stakingAddresses, bool[] calldata _addressIStaked ) external onlyRole(DEFAULT_ADMIN_ROLE) { require(_stakingAddresses.length == _addressIStaked.length, 'Owner: param length error'); for (uint256 i = 0; i < _stakingAddresses.length; i++) { require( !_feeStakingAddresses.contains(_stakingAddresses[i]), 'Owner: Address already registered' ); _feeStakingAddresses.add(_stakingAddresses[i]); if (_addressIStaked[i]) { feeStakingAddressIStaked[_stakingAddresses[i]] = true; } } emit FeeStakingAddressesAdded(_stakingAddresses); } /** * @notice Remove staking addresses * @param _stakingAddresses array of addresses eligible for fee-sharing only */ function removeFeeStakingAddresses(address[] calldata _stakingAddresses) external onlyRole(DEFAULT_ADMIN_ROLE) { for (uint256 i = 0; i < _stakingAddresses.length; i++) { require( _feeStakingAddresses.contains(_stakingAddresses[i]), 'Owner: Address not registered' ); _feeStakingAddresses.remove(_stakingAddresses[i]); if (feeStakingAddressIStaked[_stakingAddresses[i]]) { delete feeStakingAddressIStaked[_stakingAddresses[i]]; } } emit FeeStakingAddressesRemoved(_stakingAddresses); } /** * @notice Set new reward duration in blocks for next update * @param _newRewardDurationInBlocks number of blocks for new reward period */ function setNewRewardDurationInBlocks(uint256 _newRewardDurationInBlocks) external onlyRole(DEFAULT_ADMIN_ROLE) { require( (_newRewardDurationInBlocks <= MAX_REWARD_DURATION_IN_BLOCKS) && (_newRewardDurationInBlocks >= MIN_REWARD_DURATION_IN_BLOCKS), 'Owner: New reward duration in blocks outside of range' ); nextRewardDurationInBlocks = _newRewardDurationInBlocks; emit NewRewardDurationInBlocks(_newRewardDurationInBlocks); } /** * @notice Set reward convertor contract * @param _rewardConvertor address of the reward convertor (set to null to deactivate) */ function setRewardConvertor(address _rewardConvertor) external onlyRole(DEFAULT_ADMIN_ROLE) { rewardConvertor = IRewardConvertor(_rewardConvertor); emit NewRewardConvertor(_rewardConvertor); } /** * @notice See addresses eligible for fee-staking */ function viewFeeStakingAddresses() external view returns (address[] memory) { uint256 length = _feeStakingAddresses.length(); address[] memory feeStakingAddresses = new address[](length); for (uint256 i = 0; i < length; i++) { feeStakingAddresses[i] = _feeStakingAddresses.at(i); } return (feeStakingAddresses); } }
// SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.0; pragma abicoder v2; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; interface IWETH is IERC20 { function deposit() external payable; function withdraw(uint256 wad) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// 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); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// 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; } }
// 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"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Address.sol) pragma solidity ^0.8.0; /** * @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) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (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); } } } }
// 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @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 // OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol) pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {AccessControl} from '@openzeppelin/contracts/access/AccessControl.sol'; import {IERC20, SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import {ReentrancyGuard} from '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import {TokenDistributor} from './TokenDistributor.sol'; import {IStakeFor} from './IStakeFor.sol'; /** * @title FeeSharingSystem * @notice It handles the distribution of fees using * WETH along with the auto-compounding of X2Y2. */ contract FeeSharingSystem is ReentrancyGuard, AccessControl, IStakeFor { using SafeERC20 for IERC20; // for `depositFor` call bytes32 public constant DEPOSIT_ROLE = keccak256('DEPOSIT_ROLE'); // for `updateRewards()` bytes32 public constant REWARD_UPDATE_ROLE = keccak256('REWARD_UPDATE_ROLE'); struct UserInfo { uint256 shares; // shares of token staked uint256 userRewardPerTokenPaid; // user reward per token paid uint256 rewards; // pending rewards } // Precision factor for calculating rewards and exchange rate uint256 public constant PRECISION_FACTOR = 10**18; IERC20 public immutable x2y2Token; IERC20 public immutable rewardToken; TokenDistributor public immutable tokenDistributor; // Reward rate (block) uint256 public currentRewardPerBlock; // Last reward adjustment block number uint256 public lastRewardAdjustment; // Last update block for rewards uint256 public lastUpdateBlock; // Current end block for the current reward period uint256 public periodEndBlock; // Reward per token stored uint256 public rewardPerTokenStored; // Total existing shares uint256 public totalShares; mapping(address => UserInfo) public userInfo; event Deposit(address indexed user, uint256 amount, uint256 harvestedAmount); event Harvest(address indexed user, uint256 harvestedAmount); event NewRewardPeriod(uint256 numberBlocks, uint256 rewardPerBlock, uint256 reward); event Withdraw(address indexed user, uint256 amount, uint256 harvestedAmount); /** * @notice Constructor * @param _x2y2Token address of the token staked * @param _rewardToken address of the reward token * @param _tokenDistributor address of the token distributor contract */ constructor( address _x2y2Token, address _rewardToken, address _tokenDistributor ) { rewardToken = IERC20(_rewardToken); x2y2Token = IERC20(_x2y2Token); tokenDistributor = TokenDistributor(_tokenDistributor); _grantRole(DEFAULT_ADMIN_ROLE, msg.sender); } /** * @notice deposit on behalf of `user`, must be called on fresh deposit only * @param user deposit user * @param amount amount to deposit */ function depositFor(address user, uint256 amount) external override nonReentrant onlyRole(DEPOSIT_ROLE) returns (bool) { require(amount >= PRECISION_FACTOR, 'Deposit: Amount must be >= 1 X2Y2'); // Auto compounds for everyone tokenDistributor.harvestAndCompound(); // Update reward for user _updateReward(user); // Retrieve total amount staked by this contract (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(this)); // transfer stakingToken from **sender** x2y2Token.safeTransferFrom(msg.sender, address(this), amount); uint256 currentShares; // Calculate the number of shares to issue for the user if (totalShares != 0) { currentShares = (amount * totalShares) / totalAmountStaked; // This is a sanity check to prevent deposit for 0 shares require(currentShares != 0, 'Deposit: Fail'); } else { currentShares = amount; } // Adjust internal shares userInfo[user].shares += currentShares; totalShares += currentShares; // Verify X2Y2 token allowance and adjust if necessary _checkAndAdjustX2Y2TokenAllowanceIfRequired(amount, address(tokenDistributor)); // Deposit user amount in the token distributor contract tokenDistributor.deposit(amount); emit Deposit(user, amount, 0); return true; } /** * @notice Deposit staked tokens (and collect reward tokens if requested) * @param amount amount to deposit (in X2Y2) * @param claimRewardToken whether to claim reward tokens * @dev There is a limit of 1 X2Y2 per deposit to prevent potential manipulation of current shares */ function deposit(uint256 amount, bool claimRewardToken) external nonReentrant { require(amount >= PRECISION_FACTOR, 'Deposit: Amount must be >= 1 X2Y2'); // Auto compounds for everyone tokenDistributor.harvestAndCompound(); // Update reward for user _updateReward(msg.sender); // Retrieve total amount staked by this contract (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(this)); // Transfer X2Y2 tokens to this address x2y2Token.safeTransferFrom(msg.sender, address(this), amount); uint256 currentShares; // Calculate the number of shares to issue for the user if (totalShares != 0) { currentShares = (amount * totalShares) / totalAmountStaked; // This is a sanity check to prevent deposit for 0 shares require(currentShares != 0, 'Deposit: Fail'); } else { currentShares = amount; } // Adjust internal shares userInfo[msg.sender].shares += currentShares; totalShares += currentShares; uint256 pendingRewards; if (claimRewardToken) { // Fetch pending rewards pendingRewards = userInfo[msg.sender].rewards; if (pendingRewards > 0) { userInfo[msg.sender].rewards = 0; rewardToken.safeTransfer(msg.sender, pendingRewards); } } // Verify X2Y2 token allowance and adjust if necessary _checkAndAdjustX2Y2TokenAllowanceIfRequired(amount, address(tokenDistributor)); // Deposit user amount in the token distributor contract tokenDistributor.deposit(amount); emit Deposit(msg.sender, amount, pendingRewards); } /** * @notice Harvest reward tokens that are pending */ function harvest() external nonReentrant { // Auto compounds for everyone tokenDistributor.harvestAndCompound(); // Update reward for user _updateReward(msg.sender); // Retrieve pending rewards uint256 pendingRewards = userInfo[msg.sender].rewards; // If pending rewards are null, revert require(pendingRewards > 0, 'Harvest: Pending rewards must be > 0'); // Adjust user rewards and transfer userInfo[msg.sender].rewards = 0; // Transfer reward token to sender rewardToken.safeTransfer(msg.sender, pendingRewards); emit Harvest(msg.sender, pendingRewards); } /** * @notice Withdraw staked tokens (and collect reward tokens if requested) * @param shares shares to withdraw * @param claimRewardToken whether to claim reward tokens */ function withdraw(uint256 shares, bool claimRewardToken) external nonReentrant { require( (shares > 0) && (shares <= userInfo[msg.sender].shares), 'Withdraw: Shares equal to 0 or larger than user shares' ); _withdraw(shares, claimRewardToken); } /** * @notice Withdraw all staked tokens (and collect reward tokens if requested) * @param claimRewardToken whether to claim reward tokens */ function withdrawAll(bool claimRewardToken) external nonReentrant { _withdraw(userInfo[msg.sender].shares, claimRewardToken); } /** * @notice Update the reward per block (in rewardToken) * @dev Only callable by owner. Owner is meant to be another smart contract. */ function updateRewards(uint256 reward, uint256 rewardDurationInBlocks) external onlyRole(REWARD_UPDATE_ROLE) { // Adjust the current reward per block if (block.number >= periodEndBlock) { currentRewardPerBlock = reward / rewardDurationInBlocks; } else { currentRewardPerBlock = (reward + ((periodEndBlock - block.number) * currentRewardPerBlock)) / rewardDurationInBlocks; } lastUpdateBlock = block.number; periodEndBlock = block.number + rewardDurationInBlocks; emit NewRewardPeriod(rewardDurationInBlocks, currentRewardPerBlock, reward); } /** * @notice Calculate pending rewards (WETH) for a user * @param user address of the user */ function calculatePendingRewards(address user) external view returns (uint256) { return _calculatePendingRewards(user); } /** * @notice Calculate value of X2Y2 for a user given a number of shares owned * @param user address of the user */ function calculateSharesValueInX2Y2(address user) external view returns (uint256) { // Retrieve amount staked (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(this)); // Adjust for pending rewards totalAmountStaked += tokenDistributor.calculatePendingRewards(address(this)); // Return user pro-rata of total shares return userInfo[user].shares == 0 ? 0 : (totalAmountStaked * userInfo[user].shares) / totalShares; } /** * @notice Calculate price of one share (in X2Y2 token) * Share price is expressed times 1e18 */ function calculateSharePriceInX2Y2() external view returns (uint256) { (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(this)); // Adjust for pending rewards totalAmountStaked += tokenDistributor.calculatePendingRewards(address(this)); return totalShares == 0 ? PRECISION_FACTOR : (totalAmountStaked * PRECISION_FACTOR) / (totalShares); } /** * @notice Return last block where trading rewards were distributed */ function lastRewardBlock() external view returns (uint256) { return _lastRewardBlock(); } /** * @notice Calculate pending rewards for a user * @param user address of the user */ function _calculatePendingRewards(address user) internal view returns (uint256) { return ((userInfo[user].shares * (_rewardPerToken() - (userInfo[user].userRewardPerTokenPaid))) / PRECISION_FACTOR) + userInfo[user].rewards; } /** * @notice Check current allowance and adjust if necessary * @param _amount amount to transfer * @param _to token to transfer */ function _checkAndAdjustX2Y2TokenAllowanceIfRequired(uint256 _amount, address _to) internal { if (x2y2Token.allowance(address(this), _to) < _amount) { x2y2Token.approve(_to, type(uint256).max); } } /** * @notice Return last block where rewards must be distributed */ function _lastRewardBlock() internal view returns (uint256) { return block.number < periodEndBlock ? block.number : periodEndBlock; } /** * @notice Return reward per token */ function _rewardPerToken() internal view returns (uint256) { if (totalShares == 0) { return rewardPerTokenStored; } return rewardPerTokenStored + ((_lastRewardBlock() - lastUpdateBlock) * (currentRewardPerBlock * PRECISION_FACTOR)) / totalShares; } /** * @notice Update reward for a user account * @param _user address of the user */ function _updateReward(address _user) internal { if (block.number != lastUpdateBlock) { rewardPerTokenStored = _rewardPerToken(); lastUpdateBlock = _lastRewardBlock(); } userInfo[_user].rewards = _calculatePendingRewards(_user); userInfo[_user].userRewardPerTokenPaid = rewardPerTokenStored; } /** * @notice Withdraw staked tokens (and collect reward tokens if requested) * @param shares shares to withdraw * @param claimRewardToken whether to claim reward tokens */ function _withdraw(uint256 shares, bool claimRewardToken) internal { // Auto compounds for everyone tokenDistributor.harvestAndCompound(); // Update reward for user _updateReward(msg.sender); // Retrieve total amount staked and calculated current amount (in X2Y2) (uint256 totalAmountStaked, ) = tokenDistributor.userInfo(address(this)); uint256 currentAmount = (totalAmountStaked * shares) / totalShares; userInfo[msg.sender].shares -= shares; totalShares -= shares; // Withdraw amount equivalent in shares tokenDistributor.withdraw(currentAmount); uint256 pendingRewards; if (claimRewardToken) { // Fetch pending rewards pendingRewards = userInfo[msg.sender].rewards; if (pendingRewards > 0) { userInfo[msg.sender].rewards = 0; rewardToken.safeTransfer(msg.sender, pendingRewards); } } // Transfer X2Y2 tokens to sender x2y2Token.safeTransfer(msg.sender, currentAmount); emit Withdraw(msg.sender, currentAmount, pendingRewards); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {ReentrancyGuard} from '@openzeppelin/contracts/security/ReentrancyGuard.sol'; import {IERC20, SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import {IMintableERC20} from './IMintableERC20.sol'; /** * @title TokenDistributor * @notice It handles the distribution of X2Y2 token. * It auto-adjusts block rewards over a set number of periods. */ contract TokenDistributor is ReentrancyGuard { using SafeERC20 for IERC20; using SafeERC20 for IMintableERC20; struct StakingPeriod { uint256 rewardPerBlockForStaking; uint256 rewardPerBlockForOthers; uint256 periodLengthInBlock; } struct UserInfo { uint256 amount; // Amount of staked tokens provided by user uint256 rewardDebt; // Reward debt } // Precision factor for calculating rewards uint256 public constant PRECISION_FACTOR = 10**12; IMintableERC20 public immutable x2y2Token; address public immutable tokenSplitter; // Number of reward periods uint256 public immutable NUMBER_PERIODS; // Block number when rewards start uint256 public immutable START_BLOCK; // Accumulated tokens per share uint256 public accTokenPerShare; // Current phase for rewards uint256 public currentPhase; // Block number when rewards end uint256 public endBlock; // Block number of the last update uint256 public lastRewardBlock; // Tokens distributed per block for other purposes (team + treasury + trading rewards) uint256 public rewardPerBlockForOthers; // Tokens distributed per block for staking uint256 public rewardPerBlockForStaking; // Total amount staked uint256 public totalAmountStaked; mapping(uint256 => StakingPeriod) public stakingPeriod; mapping(address => UserInfo) public userInfo; event Compound(address indexed user, uint256 harvestedAmount); event Deposit(address indexed user, uint256 amount, uint256 harvestedAmount); event NewRewardsPerBlock( uint256 indexed currentPhase, uint256 startBlock, uint256 rewardPerBlockForStaking, uint256 rewardPerBlockForOthers ); event Withdraw(address indexed user, uint256 amount, uint256 harvestedAmount); /** * @notice Constructor * @param _x2y2Token token address * @param _tokenSplitter token splitter contract address (for team and trading rewards) * @param _startBlock start block for reward program * @param _rewardsPerBlockForStaking array of rewards per block for staking * @param _rewardsPerBlockForOthers array of rewards per block for other purposes (team + treasury + trading rewards) * @param _periodLengthesInBlocks array of period lengthes * @param _numberPeriods number of periods with different rewards/lengthes (e.g., if 3 changes --> 4 periods) */ constructor( address _x2y2Token, address _tokenSplitter, uint256 _startBlock, uint256[] memory _rewardsPerBlockForStaking, uint256[] memory _rewardsPerBlockForOthers, uint256[] memory _periodLengthesInBlocks, uint256 _numberPeriods ) { require( (_periodLengthesInBlocks.length == _numberPeriods) && (_rewardsPerBlockForStaking.length == _numberPeriods) && (_rewardsPerBlockForStaking.length == _numberPeriods), 'Distributor: Lengthes must match numberPeriods' ); // 1. Operational checks for supply uint256 nonCirculatingSupply = IMintableERC20(_x2y2Token).SUPPLY_CAP() - IMintableERC20(_x2y2Token).totalSupply(); uint256 amountTokensToBeMinted; for (uint256 i = 0; i < _numberPeriods; i++) { amountTokensToBeMinted += (_rewardsPerBlockForStaking[i] * _periodLengthesInBlocks[i]) + (_rewardsPerBlockForOthers[i] * _periodLengthesInBlocks[i]); stakingPeriod[i] = StakingPeriod({ rewardPerBlockForStaking: _rewardsPerBlockForStaking[i], rewardPerBlockForOthers: _rewardsPerBlockForOthers[i], periodLengthInBlock: _periodLengthesInBlocks[i] }); } require( amountTokensToBeMinted == nonCirculatingSupply, 'Distributor: Wrong reward parameters' ); // 2. Store values x2y2Token = IMintableERC20(_x2y2Token); tokenSplitter = _tokenSplitter; rewardPerBlockForStaking = _rewardsPerBlockForStaking[0]; rewardPerBlockForOthers = _rewardsPerBlockForOthers[0]; START_BLOCK = _startBlock; endBlock = _startBlock + _periodLengthesInBlocks[0]; NUMBER_PERIODS = _numberPeriods; // Set the lastRewardBlock as the startBlock lastRewardBlock = _startBlock; } /** * @notice Deposit staked tokens and compounds pending rewards * @param amount amount to deposit (in X2Y2) */ function deposit(uint256 amount) external nonReentrant { require(amount > 0, 'Deposit: Amount must be > 0'); require(block.number >= START_BLOCK, 'Deposit: Not started yet'); // Update pool information _updatePool(); // Transfer X2Y2 tokens to this contract x2y2Token.safeTransferFrom(msg.sender, address(this), amount); uint256 pendingRewards; // If not new deposit, calculate pending rewards (for auto-compounding) if (userInfo[msg.sender].amount > 0) { pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; } // Adjust user information userInfo[msg.sender].amount += (amount + pendingRewards); userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; // Increase totalAmountStaked totalAmountStaked += (amount + pendingRewards); emit Deposit(msg.sender, amount, pendingRewards); } /** * @notice Compound based on pending rewards */ function harvestAndCompound() external nonReentrant { // Update pool information _updatePool(); // Calculate pending rewards uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; // Return if no pending rewards if (pendingRewards == 0) { // It doesn't throw revertion (to help with the fee-sharing auto-compounding contract) return; } // Adjust user amount for pending rewards userInfo[msg.sender].amount += pendingRewards; // Adjust totalAmountStaked totalAmountStaked += pendingRewards; // Recalculate reward debt based on new user amount userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; emit Compound(msg.sender, pendingRewards); } /** * @notice Update pool rewards */ function updatePool() external nonReentrant { _updatePool(); } /** * @notice Withdraw staked tokens and compound pending rewards * @param amount amount to withdraw */ function withdraw(uint256 amount) external nonReentrant { require( (userInfo[msg.sender].amount >= amount) && (amount > 0), 'Withdraw: Amount must be > 0 or lower than user balance' ); // Update pool _updatePool(); // Calculate pending rewards uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; // Adjust user information userInfo[msg.sender].amount = userInfo[msg.sender].amount + pendingRewards - amount; userInfo[msg.sender].rewardDebt = (userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR; // Adjust total amount staked totalAmountStaked = totalAmountStaked + pendingRewards - amount; // Transfer X2Y2 tokens to the sender x2y2Token.safeTransfer(msg.sender, amount); emit Withdraw(msg.sender, amount, pendingRewards); } /** * @notice Withdraw all staked tokens and collect tokens */ function withdrawAll() external nonReentrant { require(userInfo[msg.sender].amount > 0, 'Withdraw: Amount must be > 0'); // Update pool _updatePool(); // Calculate pending rewards and amount to transfer (to the sender) uint256 pendingRewards = ((userInfo[msg.sender].amount * accTokenPerShare) / PRECISION_FACTOR) - userInfo[msg.sender].rewardDebt; uint256 amountToTransfer = userInfo[msg.sender].amount + pendingRewards; // Adjust total amount staked totalAmountStaked = totalAmountStaked - userInfo[msg.sender].amount; // Adjust user information userInfo[msg.sender].amount = 0; userInfo[msg.sender].rewardDebt = 0; // Transfer X2Y2 tokens to the sender x2y2Token.safeTransfer(msg.sender, amountToTransfer); emit Withdraw(msg.sender, amountToTransfer, pendingRewards); } /** * @notice Calculate pending rewards for a user * @param user address of the user * @return Pending rewards */ function calculatePendingRewards(address user) external view returns (uint256) { if ((block.number > lastRewardBlock) && (totalAmountStaked != 0)) { uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); uint256 tokenRewardForStaking = multiplier * rewardPerBlockForStaking; uint256 adjustedEndBlock = endBlock; uint256 adjustedCurrentPhase = currentPhase; // Check whether to adjust multipliers and reward per block while ( (block.number > adjustedEndBlock) && (adjustedCurrentPhase < (NUMBER_PERIODS - 1)) ) { // Update current phase adjustedCurrentPhase++; // Update rewards per block uint256 adjustedRewardPerBlockForStaking = stakingPeriod[adjustedCurrentPhase] .rewardPerBlockForStaking; // Calculate adjusted block number uint256 previousEndBlock = adjustedEndBlock; // Update end block adjustedEndBlock = previousEndBlock + stakingPeriod[adjustedCurrentPhase].periodLengthInBlock; // Calculate new multiplier uint256 newMultiplier = (block.number <= adjustedEndBlock) ? (block.number - previousEndBlock) : stakingPeriod[adjustedCurrentPhase].periodLengthInBlock; // Adjust token rewards for staking tokenRewardForStaking += (newMultiplier * adjustedRewardPerBlockForStaking); } uint256 adjustedTokenPerShare = accTokenPerShare + (tokenRewardForStaking * PRECISION_FACTOR) / totalAmountStaked; return (userInfo[user].amount * adjustedTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } else { return (userInfo[user].amount * accTokenPerShare) / PRECISION_FACTOR - userInfo[user].rewardDebt; } } /** * @notice Update reward variables of the pool */ function _updatePool() internal { if (block.number <= lastRewardBlock) { return; } if (totalAmountStaked == 0) { lastRewardBlock = block.number; return; } // Calculate multiplier uint256 multiplier = _getMultiplier(lastRewardBlock, block.number); // Calculate rewards for staking and others uint256 tokenRewardForStaking = multiplier * rewardPerBlockForStaking; uint256 tokenRewardForOthers = multiplier * rewardPerBlockForOthers; // Check whether to adjust multipliers and reward per block while ((block.number > endBlock) && (currentPhase < (NUMBER_PERIODS - 1))) { // Update rewards per block _updateRewardsPerBlock(endBlock); uint256 previousEndBlock = endBlock; // Adjust the end block endBlock += stakingPeriod[currentPhase].periodLengthInBlock; // Adjust multiplier to cover the missing periods with other lower inflation schedule uint256 newMultiplier = _getMultiplier(previousEndBlock, block.number); // Adjust token rewards tokenRewardForStaking += (newMultiplier * rewardPerBlockForStaking); tokenRewardForOthers += (newMultiplier * rewardPerBlockForOthers); } // Mint tokens only if token rewards for staking are not null if (tokenRewardForStaking > 0) { // It allows protection against potential issues to prevent funds from being locked bool mintStatus = x2y2Token.mint(address(this), tokenRewardForStaking); if (mintStatus) { accTokenPerShare = accTokenPerShare + ((tokenRewardForStaking * PRECISION_FACTOR) / totalAmountStaked); } x2y2Token.mint(tokenSplitter, tokenRewardForOthers); } // Update last reward block only if it wasn't updated after or at the end block if (lastRewardBlock <= endBlock) { lastRewardBlock = block.number; } } /** * @notice Update rewards per block * @dev Rewards are halved by 2 (for staking + others) */ function _updateRewardsPerBlock(uint256 _newStartBlock) internal { // Update current phase currentPhase++; // Update rewards per block rewardPerBlockForStaking = stakingPeriod[currentPhase].rewardPerBlockForStaking; rewardPerBlockForOthers = stakingPeriod[currentPhase].rewardPerBlockForOthers; emit NewRewardsPerBlock( currentPhase, _newStartBlock, rewardPerBlockForStaking, rewardPerBlockForOthers ); } /** * @notice Return reward multiplier over the given "from" to "to" block. * @param from block to start calculating reward * @param to block to finish calculating reward * @return the multiplier for the period */ function _getMultiplier(uint256 from, uint256 to) internal view returns (uint256) { if (to <= endBlock) { return to - from; } else if (from >= endBlock) { return 0; } else { return endBlock - from; } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IRewardConvertor { function convert( address tokenToSell, address tokenToBuy, uint256 amount, bytes calldata additionalData ) external returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol'; interface IMintableERC20 is IERC20 { function SUPPLY_CAP() external view returns (uint256); function mint(address account, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ITokenStaked { function getTotalStaked() external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IStakeFor { function depositFor(address user, uint256 amount) external returns (bool); }
{ "optimizer": { "enabled": true, "runs": 100 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"contract TokenSplitter","name":"tokenSplitter_","type":"address"},{"internalType":"contract FeeSharingSetter","name":"feeSetter_","type":"address"},{"internalType":"contract IWETH","name":"weth_","type":"address"},{"internalType":"address","name":"operator_","type":"address"},{"internalType":"address","name":"admin_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OPERATOR_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"canRelease","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeSetter","outputs":[{"internalType":"contract FeeSharingSetter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"}],"name":"release","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"},{"internalType":"address[]","name":"accounts","type":"address[]"}],"name":"releaseAndUpdateReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenSplitter","outputs":[{"internalType":"contract TokenSplitter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"contract IWETH","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"contract IERC20[]","name":"tokens","type":"address[]"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000e7643ff46c6f88ed812b3e7198c2fa2522d630cc000000000000000000000000f704353b5c98577d3b4274614e62fc79676d33bd000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc200000000000000000000000000000000000000000000000000000000000000000000000000000000000000005d7cca9fb832bbd99c8bd720ebda39b028648301
-----Decoded View---------------
Arg [0] : tokenSplitter_ (address): 0xe7643Ff46C6f88ED812b3E7198c2fA2522d630CC
Arg [1] : feeSetter_ (address): 0xF704353B5C98577d3B4274614e62Fc79676D33bD
Arg [2] : weth_ (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
Arg [3] : operator_ (address): 0x0000000000000000000000000000000000000000
Arg [4] : admin_ (address): 0x5D7CcA9Fb832BBD99C8bD720EbdA39B028648301
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000e7643ff46c6f88ed812b3e7198c2fa2522d630cc
Arg [1] : 000000000000000000000000f704353b5c98577d3b4274614e62fc79676d33bd
Arg [2] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000005d7cca9fb832bbd99c8bd720ebda39b028648301
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | Ether (ETH) | 100.00% | $3,266.64 | 0.0317 | $103.53 |
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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.