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Latest 25 from a total of 340 transactions
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Emergency Withdr... | 17332124 | 460 days ago | IN | 0 ETH | 0.00095691 | ||||
Emergency Withdr... | 17332114 | 460 days ago | IN | 0 ETH | 0.00615235 | ||||
Claim | 17310544 | 463 days ago | IN | 0.00052 ETH | 0.00590077 | ||||
Claim | 17310532 | 463 days ago | IN | 0.00052 ETH | 0.00647331 | ||||
Claim | 17310511 | 463 days ago | IN | 0.00052 ETH | 0.00717174 | ||||
Claim | 17310505 | 463 days ago | IN | 0.00052 ETH | 0.00604998 | ||||
Claim | 17310499 | 463 days ago | IN | 0.00052 ETH | 0.00619979 | ||||
Claim | 17310490 | 463 days ago | IN | 0.00052 ETH | 0.00661977 | ||||
Add Distributor | 17295664 | 465 days ago | IN | 0.00052 ETH | 0.02342983 | ||||
Claim | 17275806 | 468 days ago | IN | 0.00052 ETH | 0.00855918 | ||||
Claim | 17272648 | 468 days ago | IN | 0.00052 ETH | 0.01428587 | ||||
Claim | 17255836 | 470 days ago | IN | 0.00052 ETH | 0.00830577 | ||||
Add Distributor | 17242780 | 472 days ago | IN | 0.00052 ETH | 0.02161611 | ||||
Add Distributor | 17240285 | 473 days ago | IN | 0.00052 ETH | 0.04235442 | ||||
Request Random W... | 17197239 | 479 days ago | IN | 0 ETH | 0.02048369 | ||||
Claim | 17155426 | 485 days ago | IN | 0.00052 ETH | 0.00705496 | ||||
Claim | 17152049 | 485 days ago | IN | 0.00052 ETH | 0.00682326 | ||||
Claim | 17149907 | 485 days ago | IN | 0.00052 ETH | 0.00735856 | ||||
Call Airdrop | 17149444 | 485 days ago | IN | 0 ETH | 0.00816013 | ||||
Add Distributor | 17144934 | 486 days ago | IN | 0.00052 ETH | 0.01587385 | ||||
Add Distributor | 17143560 | 486 days ago | IN | 0.00052 ETH | 0.01306475 | ||||
Add Distributor | 17142353 | 486 days ago | IN | 0.00052 ETH | 0.01509726 | ||||
Add Distributor | 17140686 | 487 days ago | IN | 0.00052 ETH | 0.01745791 | ||||
Add Distributor | 17136841 | 487 days ago | IN | 0.00052 ETH | 0.01397612 | ||||
Add Distributor | 17135689 | 487 days ago | IN | 0.00052 ETH | 0.01359493 |
Latest 25 internal transactions (View All)
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Parent Transaction Hash | Block | From | To | |||
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17332124 | 460 days ago | 0.1633252 ETH | ||||
17310544 | 463 days ago | 0.00052 ETH | ||||
17310532 | 463 days ago | 0.00052 ETH | ||||
17310511 | 463 days ago | 0.00052 ETH | ||||
17310505 | 463 days ago | 0.00052 ETH | ||||
17310499 | 463 days ago | 0.00052 ETH | ||||
17310490 | 463 days ago | 0.00052 ETH | ||||
17295664 | 465 days ago | 0.00052 ETH | ||||
17275806 | 468 days ago | 0.00052 ETH | ||||
17272648 | 468 days ago | 0.00052 ETH | ||||
17268774 | 469 days ago | 0.0011307 ETH | ||||
17263290 | 469 days ago | 0.0007802 ETH | ||||
17260145 | 470 days ago | 0.01321754 ETH | ||||
17255836 | 470 days ago | 0.00052 ETH | ||||
17254709 | 471 days ago | 0.01067464 ETH | ||||
17251521 | 471 days ago | 0.00404953 ETH | ||||
17242780 | 472 days ago | 0.00052 ETH | ||||
17240285 | 473 days ago | 0.00052 ETH | ||||
17229613 | 474 days ago | 0.00198195 ETH | ||||
17229575 | 474 days ago | 0.02430124 ETH | ||||
17224238 | 475 days ago | 0.01090739 ETH | ||||
17209602 | 477 days ago | 0.01116787 ETH | ||||
17207708 | 477 days ago | 0.00254527 ETH | ||||
17207476 | 477 days ago | 0.00674019 ETH | ||||
17205118 | 478 days ago | 0.01480956 ETH |
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Contract Name:
LuckyRooAirdrop
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 100 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; pragma abicoder v2; /** * @author Brewlabs * This contract has been developed by brewlabs.info */ import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@chainlink/contracts/src/v0.8/interfaces/LinkTokenInterface.sol"; import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol"; import "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol"; import "../libs/IPriceOracle.sol"; interface IPegSwap { function swap(uint256 amount, address source, address target) external; function getSwappableAmount(address source, address target) external view returns (uint256); } contract LuckyRooAirdrop is ReentrancyGuard, VRFConsumerBaseV2, Ownable { using SafeERC20 for IERC20; VRFCoordinatorV2Interface COORDINATOR; LinkTokenInterface LINKTOKEN; bool public initialized = false; IERC20 public token; IPriceOracle private oracle; uint64 public s_subscriptionId; bytes32 keyHash; uint32 callbackGasLimit = 150000; uint16 requestConfirmations = 3; uint32 numWords = 3; uint256 public s_requestId; uint256 public r_requestId; uint256[] public s_randomWords; struct AirdropResult { address[3] winner; uint256[3] amount; } uint256 public currentID = 1; uint256 public distributeRate = 9500; uint256 public distributorLimit = 500 ether; uint256[3] public airdropRates = [6000, 2500, 1000]; mapping(uint256 => AirdropResult) private results; uint256 public lastAirdropTime; struct DistributorInfo { uint256 amount; uint256 regAirdropID; } mapping(address => DistributorInfo) public userInfo; address[] public distributors; address public treasury = 0xE2123f0F85953414eb3B4Dfa97790ec8e0102D44; uint256 public performanceFee = 0.00052 ether; uint256 public totalStaked; // BSC Mainnet ERC20_LINK_ADDRESS address public constant ERC20_LINK_ADDRESS = 0xF8A0BF9cF54Bb92F17374d9e9A321E6a111a51bD; address public constant PEGSWAP_ADDRESS = 0x1FCc3B22955e76Ca48bF025f1A6993685975Bb9e; event AddDistributor(address user, uint256 amount); event Claim(address user, uint256 amount); event HolderDistributed(uint256 id, address[3] winners, uint256[3] amounts); event SetDistributorLimit(uint256 limit); event SetDistributorRates(uint256[3] rates); event ServiceInfoUpadted(address addr, uint256 fee); /** * @notice Constructor * @dev RandomNumberGenerator must be deployed prior to this contract */ constructor(address _vrfCoordinator, address _link, bytes32 _keyHash) VRFConsumerBaseV2(_vrfCoordinator) { COORDINATOR = VRFCoordinatorV2Interface(_vrfCoordinator); s_subscriptionId = COORDINATOR.createSubscription(); keyHash = _keyHash; COORDINATOR.addConsumer(s_subscriptionId, address(this)); LINKTOKEN = LinkTokenInterface(_link); } /** * @notice Initialize the contract * @dev This function must be called by the owner of the contract. */ function initialize(address _token, address _oracle) external onlyOwner { require(!initialized, "Contract already initialized"); initialized = true; token = IERC20(_token); oracle = IPriceOracle(_oracle); } function addDistributor() external payable nonReentrant { require(initialized, "Contract not initialized"); require(!isContract(msg.sender), "contract cannot be distributor"); DistributorInfo storage user = userInfo[msg.sender]; require(user.regAirdropID < currentID, "already added"); require(user.amount == 0, "claim previous stake first"); _transferPerformanceFee(); uint256 tokenPrice = oracle.getTokenPrice(address(token)); uint256 tokenBal = token.balanceOf(msg.sender); uint256 amount = distributorLimit * 1 ether / tokenPrice; require(tokenPrice > 0, "LUCKY ROO price is missing"); require(tokenBal >= amount, "insufficient holder balance"); uint256 beforeAmt = token.balanceOf(address(this)); token.safeTransferFrom(msg.sender, address(this), amount); uint256 realAmt = token.balanceOf(address(this)) - beforeAmt; if (realAmt > amount) realAmt = amount; user.amount = realAmt; user.regAirdropID = currentID; distributors.push(msg.sender); totalStaked += user.amount; emit AddDistributor(msg.sender, realAmt); } function claim() external payable nonReentrant { DistributorInfo storage user = userInfo[msg.sender]; require(user.amount > 0, "not registered"); require(user.regAirdropID < currentID, "can claim after this round is finished"); _transferPerformanceFee(); token.safeTransfer(msg.sender, user.amount); emit Claim(msg.sender, user.amount); totalStaked -= user.amount; user.amount = 0; } function _transferPerformanceFee() internal { require(msg.value >= performanceFee, "should pay small gas to add as a distributor"); payable(treasury).transfer(performanceFee); if (msg.value > performanceFee) { payable(msg.sender).transfer(msg.value - performanceFee); } } function numDistributors() external view returns (uint256) { return distributors.length; } /** * @notice Distribute the prizes to the three winners * @dev This function must be called by the owner of the contract. */ function callAirdrop() external onlyOwner { require(initialized, "Contract not initialized"); require(s_requestId == r_requestId, "Request IDs do not match"); require(s_randomWords.length == numWords, "Number of words does not match"); uint256 numHolders = distributors.length; require(numHolders > 3, "Not enough distributors"); s_requestId = 0; uint256[3] memory idx; uint256[3] memory sortedIdx; for (uint256 i = 0; i < 3; i++) { idx[i] = s_randomWords[i] % (numHolders - i); for (uint256 j = 0; j < i; j++) { if (idx[i] >= sortedIdx[j]) { idx[i] = idx[i] + 1; } else { break; } } idx[i] = idx[i] % numHolders; sortedIdx[i] = idx[i]; if (i > 0 && sortedIdx[i] < sortedIdx[i - 1]) { uint256 t = sortedIdx[i]; sortedIdx[i] = sortedIdx[i - 1]; sortedIdx[i - 1] = t; } } AirdropResult storage airdropResult = results[currentID]; uint256 amount = address(this).balance; amount = amount * distributeRate / 10000; for (uint256 i = 0; i < 3; i++) { address winnerA = distributors[idx[i]]; airdropResult.winner[i] = winnerA; uint256 amountA = amount * airdropRates[i] / 10000; airdropResult.amount[i] = amountA; payable(winnerA).transfer(amountA); } emit HolderDistributed(currentID, airdropResult.winner, airdropResult.amount); currentID = currentID + 1; lastAirdropTime = block.timestamp; distributors = new address[](0); } function getAirdropResult(uint256 _id) external view returns (address[3] memory, uint256[3] memory) { return (results[_id].winner, results[_id].amount); } /** * @notice Set the distribution rates for the three wallets * @dev This function must be called by the owner of the contract. */ function setAirdropRates(uint256 _rateA, uint256 _rateB, uint256 _rateC) external onlyOwner { require(_rateA > 0, "Rate A must be greater than 0"); require(_rateB > 0, "Rate B must be greater than 0"); require(_rateC > 0, "Rate C must be greater than 0"); require(_rateA + _rateB + _rateC < 10000, "Total rate must be less than 10000"); airdropRates = [_rateA, _rateB, _rateC]; emit SetDistributorRates(airdropRates); } /** * @notice Set the minimum holding tokens to add distributor in usd * @dev This function must be called by the owner of the contract. */ function setDistributorBalanceLimit(uint256 _min) external onlyOwner { distributorLimit = _min * 1 ether; emit SetDistributorLimit(_min); } function setServiceInfo(address _treasury, uint256 _fee) external { require(msg.sender == treasury, "setServiceInfo: FORBIDDEN"); require(_treasury != address(0x0), "Invalid address"); treasury = _treasury; performanceFee = _fee; emit ServiceInfoUpadted(_treasury, _fee); } function setCoordiatorConfig(bytes32 _keyHash, uint32 _gasLimit, uint32 _numWords) external onlyOwner { keyHash = _keyHash; callbackGasLimit = _gasLimit; numWords = _numWords; } /** * @notice fetch subscription information from the VRF coordinator */ function getSubscriptionInfo() external view returns (uint96 balance, uint64 reqCount, address owner, address[] memory consumers) { return COORDINATOR.getSubscription(s_subscriptionId); } /** * @notice cancle subscription from the VRF coordinator * @dev This function must be called by the owner of the contract. */ function cancelSubscription() external onlyOwner { COORDINATOR.cancelSubscription(s_subscriptionId, msg.sender); s_subscriptionId = 0; } /** * @notice subscribe to the VRF coordinator * @dev This function must be called by the owner of the contract. */ function startSubscription(address _vrfCoordinator) external onlyOwner { require(s_subscriptionId == 0, "Subscription already started"); COORDINATOR = VRFCoordinatorV2Interface(_vrfCoordinator); s_subscriptionId = COORDINATOR.createSubscription(); COORDINATOR.addConsumer(s_subscriptionId, address(this)); } /** * @notice Fund link token from the VRF coordinator for subscription * @dev This function must be called by the owner of the contract. */ function fundToCoordiator(uint96 _amount) external onlyOwner { LINKTOKEN.transferFrom(msg.sender, address(this), _amount); LINKTOKEN.transferAndCall(address(COORDINATOR), _amount, abi.encode(s_subscriptionId)); } /** * @notice Fund link token from the VRF coordinator for subscription * @dev This function must be called by the owner of the contract. */ function fundPeggedLinkToCoordiator(uint256 _amount) external onlyOwner { IERC20(ERC20_LINK_ADDRESS).transferFrom(msg.sender, address(this), _amount); IERC20(ERC20_LINK_ADDRESS).approve(PEGSWAP_ADDRESS, _amount); IPegSwap(PEGSWAP_ADDRESS).swap(_amount, ERC20_LINK_ADDRESS, address(LINKTOKEN)); uint256 tokenBal = LINKTOKEN.balanceOf(address(this)); LINKTOKEN.transferAndCall(address(COORDINATOR), tokenBal, abi.encode(s_subscriptionId)); } /** * @notice Request random words from the VRF coordinator * @dev This function must be called by the owner of the contract. */ function requestRandomWords() external onlyOwner { r_requestId = 0; // Will revert if subscription is not set and funded. s_requestId = COORDINATOR.requestRandomWords(keyHash, s_subscriptionId, requestConfirmations, callbackGasLimit, numWords); } function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal override { r_requestId = requestId; s_randomWords = randomWords; } function emergencyWithdrawETH() external onlyOwner { uint256 _tokenAmount = address(this).balance; payable(msg.sender).transfer(_tokenAmount); } /** * @notice It allows the admin to recover wrong tokens sent to the contract * @param _token: the address of the token to withdraw * @dev This function is only callable by admin. */ function emergencyWithdrawToken(address _token) external onlyOwner { uint256 _tokenAmount = IERC20(_token).balanceOf(address(this)); IERC20(_token).safeTransfer(msg.sender, _tokenAmount); } function isContract(address _addr) internal view returns (bool) { uint256 size; assembly { size := extcodesize(_addr) } return size > 0; } receive() external payable {} }
// 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/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/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 (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 pragma solidity ^0.8.0; interface LinkTokenInterface { function allowance(address owner, address spender) external view returns (uint256 remaining); function approve(address spender, uint256 value) external returns (bool success); function balanceOf(address owner) external view returns (uint256 balance); function decimals() external view returns (uint8 decimalPlaces); function decreaseApproval(address spender, uint256 addedValue) external returns (bool success); function increaseApproval(address spender, uint256 subtractedValue) external; function name() external view returns (string memory tokenName); function symbol() external view returns (string memory tokenSymbol); function totalSupply() external view returns (uint256 totalTokensIssued); function transfer(address to, uint256 value) external returns (bool success); function transferAndCall( address to, uint256 value, bytes calldata data ) external returns (bool success); function transferFrom( address from, address to, uint256 value ) external returns (bool success); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface VRFCoordinatorV2Interface { /** * @notice Get configuration relevant for making requests * @return minimumRequestConfirmations global min for request confirmations * @return maxGasLimit global max for request gas limit * @return s_provingKeyHashes list of registered key hashes */ function getRequestConfig() external view returns ( uint16, uint32, bytes32[] memory ); /** * @notice Request a set of random words. * @param keyHash - Corresponds to a particular oracle job which uses * that key for generating the VRF proof. Different keyHash's have different gas price * ceilings, so you can select a specific one to bound your maximum per request cost. * @param subId - The ID of the VRF subscription. Must be funded * with the minimum subscription balance required for the selected keyHash. * @param minimumRequestConfirmations - How many blocks you'd like the * oracle to wait before responding to the request. See SECURITY CONSIDERATIONS * for why you may want to request more. The acceptable range is * [minimumRequestBlockConfirmations, 200]. * @param callbackGasLimit - How much gas you'd like to receive in your * fulfillRandomWords callback. Note that gasleft() inside fulfillRandomWords * may be slightly less than this amount because of gas used calling the function * (argument decoding etc.), so you may need to request slightly more than you expect * to have inside fulfillRandomWords. The acceptable range is * [0, maxGasLimit] * @param numWords - The number of uint256 random values you'd like to receive * in your fulfillRandomWords callback. Note these numbers are expanded in a * secure way by the VRFCoordinator from a single random value supplied by the oracle. * @return requestId - A unique identifier of the request. Can be used to match * a request to a response in fulfillRandomWords. */ function requestRandomWords( bytes32 keyHash, uint64 subId, uint16 minimumRequestConfirmations, uint32 callbackGasLimit, uint32 numWords ) external returns (uint256 requestId); /** * @notice Create a VRF subscription. * @return subId - A unique subscription id. * @dev You can manage the consumer set dynamically with addConsumer/removeConsumer. * @dev Note to fund the subscription, use transferAndCall. For example * @dev LINKTOKEN.transferAndCall( * @dev address(COORDINATOR), * @dev amount, * @dev abi.encode(subId)); */ function createSubscription() external returns (uint64 subId); /** * @notice Get a VRF subscription. * @param subId - ID of the subscription * @return balance - LINK balance of the subscription in juels. * @return reqCount - number of requests for this subscription, determines fee tier. * @return owner - owner of the subscription. * @return consumers - list of consumer address which are able to use this subscription. */ function getSubscription(uint64 subId) external view returns ( uint96 balance, uint64 reqCount, address owner, address[] memory consumers ); /** * @notice Request subscription owner transfer. * @param subId - ID of the subscription * @param newOwner - proposed new owner of the subscription */ function requestSubscriptionOwnerTransfer(uint64 subId, address newOwner) external; /** * @notice Request subscription owner transfer. * @param subId - ID of the subscription * @dev will revert if original owner of subId has * not requested that msg.sender become the new owner. */ function acceptSubscriptionOwnerTransfer(uint64 subId) external; /** * @notice Add a consumer to a VRF subscription. * @param subId - ID of the subscription * @param consumer - New consumer which can use the subscription */ function addConsumer(uint64 subId, address consumer) external; /** * @notice Remove a consumer from a VRF subscription. * @param subId - ID of the subscription * @param consumer - Consumer to remove from the subscription */ function removeConsumer(uint64 subId, address consumer) external; /** * @notice Cancel a subscription * @param subId - ID of the subscription * @param to - Where to send the remaining LINK to */ function cancelSubscription(uint64 subId, address to) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /** **************************************************************************** * @notice Interface for contracts using VRF randomness * ***************************************************************************** * @dev PURPOSE * * @dev Reggie the Random Oracle (not his real job) wants to provide randomness * @dev to Vera the verifier in such a way that Vera can be sure he's not * @dev making his output up to suit himself. Reggie provides Vera a public key * @dev to which he knows the secret key. Each time Vera provides a seed to * @dev Reggie, he gives back a value which is computed completely * @dev deterministically from the seed and the secret key. * * @dev Reggie provides a proof by which Vera can verify that the output was * @dev correctly computed once Reggie tells it to her, but without that proof, * @dev the output is indistinguishable to her from a uniform random sample * @dev from the output space. * * @dev The purpose of this contract is to make it easy for unrelated contracts * @dev to talk to Vera the verifier about the work Reggie is doing, to provide * @dev simple access to a verifiable source of randomness. It ensures 2 things: * @dev 1. The fulfillment came from the VRFCoordinator * @dev 2. The consumer contract implements fulfillRandomWords. * ***************************************************************************** * @dev USAGE * * @dev Calling contracts must inherit from VRFConsumerBase, and can * @dev initialize VRFConsumerBase's attributes in their constructor as * @dev shown: * * @dev contract VRFConsumer { * @dev constructor(<other arguments>, address _vrfCoordinator, address _link) * @dev VRFConsumerBase(_vrfCoordinator) public { * @dev <initialization with other arguments goes here> * @dev } * @dev } * * @dev The oracle will have given you an ID for the VRF keypair they have * @dev committed to (let's call it keyHash). Create subscription, fund it * @dev and your consumer contract as a consumer of it (see VRFCoordinatorInterface * @dev subscription management functions). * @dev Call requestRandomWords(keyHash, subId, minimumRequestConfirmations, * @dev callbackGasLimit, numWords), * @dev see (VRFCoordinatorInterface for a description of the arguments). * * @dev Once the VRFCoordinator has received and validated the oracle's response * @dev to your request, it will call your contract's fulfillRandomWords method. * * @dev The randomness argument to fulfillRandomWords is a set of random words * @dev generated from your requestId and the blockHash of the request. * * @dev If your contract could have concurrent requests open, you can use the * @dev requestId returned from requestRandomWords to track which response is associated * @dev with which randomness request. * @dev See "SECURITY CONSIDERATIONS" for principles to keep in mind, * @dev if your contract could have multiple requests in flight simultaneously. * * @dev Colliding `requestId`s are cryptographically impossible as long as seeds * @dev differ. * * ***************************************************************************** * @dev SECURITY CONSIDERATIONS * * @dev A method with the ability to call your fulfillRandomness method directly * @dev could spoof a VRF response with any random value, so it's critical that * @dev it cannot be directly called by anything other than this base contract * @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method). * * @dev For your users to trust that your contract's random behavior is free * @dev from malicious interference, it's best if you can write it so that all * @dev behaviors implied by a VRF response are executed *during* your * @dev fulfillRandomness method. If your contract must store the response (or * @dev anything derived from it) and use it later, you must ensure that any * @dev user-significant behavior which depends on that stored value cannot be * @dev manipulated by a subsequent VRF request. * * @dev Similarly, both miners and the VRF oracle itself have some influence * @dev over the order in which VRF responses appear on the blockchain, so if * @dev your contract could have multiple VRF requests in flight simultaneously, * @dev you must ensure that the order in which the VRF responses arrive cannot * @dev be used to manipulate your contract's user-significant behavior. * * @dev Since the block hash of the block which contains the requestRandomness * @dev call is mixed into the input to the VRF *last*, a sufficiently powerful * @dev miner could, in principle, fork the blockchain to evict the block * @dev containing the request, forcing the request to be included in a * @dev different block with a different hash, and therefore a different input * @dev to the VRF. However, such an attack would incur a substantial economic * @dev cost. This cost scales with the number of blocks the VRF oracle waits * @dev until it calls responds to a request. It is for this reason that * @dev that you can signal to an oracle you'd like them to wait longer before * @dev responding to the request (however this is not enforced in the contract * @dev and so remains effective only in the case of unmodified oracle software). */ abstract contract VRFConsumerBaseV2 { error OnlyCoordinatorCanFulfill(address have, address want); address private immutable vrfCoordinator; /** * @param _vrfCoordinator address of VRFCoordinator contract */ constructor(address _vrfCoordinator) { vrfCoordinator = _vrfCoordinator; } /** * @notice fulfillRandomness handles the VRF response. Your contract must * @notice implement it. See "SECURITY CONSIDERATIONS" above for important * @notice principles to keep in mind when implementing your fulfillRandomness * @notice method. * * @dev VRFConsumerBaseV2 expects its subcontracts to have a method with this * @dev signature, and will call it once it has verified the proof * @dev associated with the randomness. (It is triggered via a call to * @dev rawFulfillRandomness, below.) * * @param requestId The Id initially returned by requestRandomness * @param randomWords the VRF output expanded to the requested number of words */ function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal virtual; // rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF // proof. rawFulfillRandomness then calls fulfillRandomness, after validating // the origin of the call function rawFulfillRandomWords(uint256 requestId, uint256[] memory randomWords) external { if (msg.sender != vrfCoordinator) { revert OnlyCoordinatorCanFulfill(msg.sender, vrfCoordinator); } fulfillRandomWords(requestId, randomWords); } }
// SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.0; interface IPriceOracle { /** * @notice Get the price of a token * @param token The token to get the price of * @return The asset price mantissa (scaled by 1e18). * Zero means the price is unavailable. */ function getTokenPrice(address token) external view returns (uint256); }
// 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 (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); } } } }
{ "optimizer": { "enabled": true, "runs": 100 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalStaked","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"regAirdropID","type":"uint256"}],"stateMutability":"view","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)
000000000000000000000000271682deb8c4e0901d1a1550ad2e64d568e69909000000000000000000000000514910771af9ca656af840dff83e8264ecf986caff8dedfbfa60af186cf3c830acbc32c05aae823045ae5ea7da1e45fbfaba4f92
-----Decoded View---------------
Arg [0] : _vrfCoordinator (address): 0x271682DEB8C4E0901D1a1550aD2e64D568E69909
Arg [1] : _link (address): 0x514910771AF9Ca656af840dff83E8264EcF986CA
Arg [2] : _keyHash (bytes32): 0xff8dedfbfa60af186cf3c830acbc32c05aae823045ae5ea7da1e45fbfaba4f92
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000271682deb8c4e0901d1a1550ad2e64d568e69909
Arg [1] : 000000000000000000000000514910771af9ca656af840dff83e8264ecf986ca
Arg [2] : ff8dedfbfa60af186cf3c830acbc32c05aae823045ae5ea7da1e45fbfaba4f92
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.