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Latest 25 from a total of 2,090 transactions
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Transfer Ownersh... | 18688115 | 235 days ago | IN | 0 ETH | 0.00103687 | ||||
Claim | 18687656 | 235 days ago | IN | 0 ETH | 0.00496236 | ||||
Claim Treasury | 18687527 | 235 days ago | IN | 0 ETH | 0.00163473 | ||||
Claim | 17700868 | 373 days ago | IN | 0 ETH | 0.01188089 | ||||
Claim | 17700684 | 373 days ago | IN | 0 ETH | 0.0102079 | ||||
Claim | 17700333 | 373 days ago | IN | 0 ETH | 0.00707585 | ||||
Claim | 17700218 | 373 days ago | IN | 0 ETH | 0.00787147 | ||||
Claim | 17700163 | 373 days ago | IN | 0 ETH | 0.00367967 | ||||
Claim | 17700090 | 373 days ago | IN | 0 ETH | 0.00651798 | ||||
Claim | 17699945 | 374 days ago | IN | 0 ETH | 0.00762266 | ||||
Claim | 17699904 | 374 days ago | IN | 0 ETH | 0.01639813 | ||||
Claim | 17699898 | 374 days ago | IN | 0 ETH | 0.01580011 | ||||
Claim | 17699887 | 374 days ago | IN | 0 ETH | 0.00889278 | ||||
Claim | 17699707 | 374 days ago | IN | 0 ETH | 0.00362222 | ||||
Claim Treasury | 17699325 | 374 days ago | IN | 0 ETH | 0.00070228 | ||||
Claim Treasury | 17699301 | 374 days ago | IN | 0 ETH | 0.00064201 | ||||
Claim Treasury | 17492465 | 403 days ago | IN | 0 ETH | 0.00091795 | ||||
Claim | 17469669 | 406 days ago | IN | 0 ETH | 0.00182201 | ||||
Claim | 17469666 | 406 days ago | IN | 0 ETH | 0.00199792 | ||||
Claim | 17339875 | 424 days ago | IN | 0 ETH | 0.00265015 | ||||
Claim | 17296112 | 430 days ago | IN | 0 ETH | 0.00459266 | ||||
Claim | 17273961 | 433 days ago | IN | 0 ETH | 0.00706503 | ||||
Claim | 17247682 | 437 days ago | IN | 0 ETH | 0.00655074 | ||||
Close Round | 17243425 | 438 days ago | IN | 0 ETH | 0.0057948 | ||||
Start New Round | 17223817 | 441 days ago | IN | 0 ETH | 0.0035699 |
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Contract Name:
PredictionMarket
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; pragma abicoder v2; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; /** * @title Prediction Market Contract with ERC20 bets and allows for concurrent */ contract PredictionMarket is Ownable, Pausable, ReentrancyGuard { using SafeERC20 for IERC20; IERC20 public immutable token; // Prediction token address public adminAddress; // address of the admin address public operatorAddress; // address of the operator uint256 public minBetAmount; // minimum betting amount (denominated in wei) uint256 public treasuryFee; // treasury rate (e.g. 200 = 2%, 150 = 1.50%) uint256 public treasuryAmount; // treasury amount that was not claimed uint256 public currentRound; // current epoch for prediction round uint256 public constant MAX_TREASURY_FEE = 1000; // 10% mapping(uint256 => mapping(address => BetInfo)) public ledger; mapping(uint256 => Round) public rounds; mapping(address => uint256[]) public userRounds; enum Position { Bull, Bear } enum Outcome { Up, Down, Draw } struct Round { uint256 epoch; uint256 startTimestamp; uint256 lockTimestamp; uint256 closeTimestamp; uint256 totalAmount; uint256 bullAmount; uint256 bearAmount; uint256 rewardBaseCalAmount; uint256 rewardAmount; bool roundClosed; Outcome outcome; } struct BetInfo { Position position; uint256 amount; bool claimed; // default false } event StartRound(uint256 indexed round); event EndRound(uint256 indexed round, Outcome outcome); event BetBear( address indexed sender, uint256 indexed round, uint256 amount ); event BetBull( address indexed sender, uint256 indexed round, uint256 amount ); event Claim(address indexed sender, uint256 indexed round, uint256 amount); event NewAdminAddress(address admin); event NewMinBetAmount(uint256 indexed round, uint256 minBetAmount); event NewTreasuryFee(uint256 indexed round, uint256 treasuryFee); event NewOperatorAddress(address operator); event RewardsCalculated( uint256 indexed round, uint256 rewardBaseCalAmount, uint256 rewardAmount, uint256 treasuryAmount ); event TokenRecovery(address indexed token, uint256 amount); event TreasuryClaim(uint256 amount); event Pause(uint256 indexed round); event Unpause(uint256 indexed round); modifier onlyAdmin() { require(msg.sender == adminAddress, "Not admin"); _; } modifier onlyAdminOrOperator() { require( msg.sender == adminAddress || msg.sender == operatorAddress, "Not operator/admin" ); _; } modifier onlyOperator() { require(msg.sender == operatorAddress, "Not operator"); _; } modifier notContract() { require(!_isContract(msg.sender), "Contract not allowed"); require(msg.sender == tx.origin, "Proxy contract not allowed"); _; } /** * @notice Constructor * @param _token: prediction token * @param _adminAddress: admin address * @param _operatorAddress: operator address * @param _minBetAmount: minimum bet amounts (in wei) * @param _treasuryFee: treasury fee (1000 = 10%) */ constructor( IERC20 _token, address _adminAddress, address _operatorAddress, uint256 _minBetAmount, uint256 _treasuryFee ) { require(_treasuryFee <= MAX_TREASURY_FEE, "Treasury fee too high"); token = _token; adminAddress = _adminAddress; operatorAddress = _operatorAddress; minBetAmount = _minBetAmount; treasuryFee = _treasuryFee; } /** * @notice Bet bear position * @param epoch: epoch */ function betBear( uint256 epoch, uint256 _amount ) external whenNotPaused nonReentrant notContract { //todo update bettable to check that epoch exists and that current timestamp is less than lock timestamp require(_bettable(epoch), "Round not bettable"); require( _amount >= minBetAmount, "Bet amount must be greater than minBetAmount" ); require( ledger[epoch][msg.sender].amount == 0, "Can only bet once per round" ); token.safeTransferFrom(msg.sender, address(this), _amount); // Update round data uint256 amount = _amount; Round storage round = rounds[epoch]; round.totalAmount = round.totalAmount + amount; round.bearAmount = round.bearAmount + amount; // Update user data BetInfo storage betInfo = ledger[epoch][msg.sender]; betInfo.position = Position.Bear; betInfo.amount = amount; userRounds[msg.sender].push(epoch); emit BetBear(msg.sender, epoch, amount); } /** * @notice Bet bull position * @param epoch: epoch */ function betBull( uint256 epoch, uint256 _amount ) external whenNotPaused nonReentrant notContract { //todo update bettable to check that epoch exists and that current timestamp is less than lock timestamp, require(_bettable(epoch), "Round not bettable"); require( _amount >= minBetAmount, "Bet amount must be greater than minBetAmount" ); require( ledger[epoch][msg.sender].amount == 0, "Can only bet once per round" ); token.safeTransferFrom(msg.sender, address(this), _amount); // Update round data uint256 amount = _amount; Round storage round = rounds[epoch]; round.totalAmount = round.totalAmount + amount; round.bullAmount = round.bullAmount + amount; // Update user data BetInfo storage betInfo = ledger[epoch][msg.sender]; betInfo.position = Position.Bull; betInfo.amount = amount; userRounds[msg.sender].push(epoch); emit BetBull(msg.sender, epoch, amount); } /** * @notice Claim reward for an array of epochs * @param epochs: array of epochs */ function claim( uint256[] calldata epochs ) external nonReentrant notContract { uint256 reward; // Initializes reward for (uint256 i = 0; i < epochs.length; i++) { require( rounds[epochs[i]].startTimestamp != 0, "Round has not started" ); require( block.timestamp > rounds[epochs[i]].closeTimestamp, "Round has not ended" ); uint256 addedReward = 0; // Round valid, claim rewards if (rounds[epochs[i]].roundClosed) { require( claimable(epochs[i], msg.sender), "Not eligible for claim" ); Round memory round = rounds[epochs[i]]; addedReward = (ledger[epochs[i]][msg.sender].amount * round.rewardAmount) / round.rewardBaseCalAmount; } ledger[epochs[i]][msg.sender].claimed = true; reward += addedReward; emit Claim(msg.sender, epochs[i], addedReward); } if (reward > 0) { token.safeTransfer(msg.sender, reward); } } /** * @notice Closes round with epoch * @param _epochToEnd: the round that is being closed * @param _outcome: result of the round * @dev Callable by operator */ function closeRound( uint256 _epochToEnd, Outcome _outcome ) external whenNotPaused onlyOperator { require(_epochToEnd <= currentRound, "Round does not exist"); require( !rounds[_epochToEnd].roundClosed, "Round has already been closed" ); //todo take input for which side won here and send to _safeLockRound or more likely _safeEndRound, since we only have start and finish calls per epoch _safeEndRound(_epochToEnd, _outcome); _calculateRewards(_epochToEnd); } /** * @notice Start genesis round * @dev Callable by admin or operator */ function startNewRound( uint256 _lockTimestamp, uint256 _closeTimestamp ) external whenNotPaused onlyOperator { //todo review/remove genesis start booleans require( _lockTimestamp > block.timestamp, "lockTimestamp must be greater than current timestamp" ); require( _lockTimestamp < _closeTimestamp, "lock timestamp must be less than close timestamp" ); currentRound = currentRound + 1; Round storage round = rounds[currentRound]; round.startTimestamp = block.timestamp; round.lockTimestamp = _lockTimestamp; round.closeTimestamp = _closeTimestamp; round.epoch = currentRound; round.totalAmount = 0; emit StartRound(currentRound); } /** /** * @notice called by the admin to pause, triggers stopped state * @dev Callable by admin or operator */ function pause() external whenNotPaused onlyAdminOrOperator { _pause(); emit Pause(currentRound); } /** * @notice Claim all rewards in treasury * @dev Callable by admin */ function claimTreasury() external nonReentrant onlyAdmin { uint256 currentTreasuryAmount = treasuryAmount; treasuryAmount = 0; token.safeTransfer(adminAddress, currentTreasuryAmount); emit TreasuryClaim(currentTreasuryAmount); } /** * @notice called by the admin to unpause, returns to normal state * Reset genesis state. Once paused, the rounds would need to be kickstarted by genesis * @dev Callable by admin or operator */ function unpause() external whenPaused onlyAdminOrOperator { _unpause(); emit Unpause(currentRound); } /** * @notice Set minBetAmount * @dev Callable by admin */ function setMinBetAmount( uint256 _minBetAmount ) external whenPaused onlyAdmin { require(_minBetAmount != 0, "Must be superior to 0"); minBetAmount = _minBetAmount; emit NewMinBetAmount(currentRound, minBetAmount); } /** * @notice Set operator address * @dev Callable by admin */ function setOperator(address _operatorAddress) external onlyAdmin { require(_operatorAddress != address(0), "Cannot be zero address"); operatorAddress = _operatorAddress; emit NewOperatorAddress(_operatorAddress); } /** * @notice Set treasury fee * @dev Callable by admin */ function setTreasuryFee( uint256 _treasuryFee ) external whenPaused onlyAdmin { require(_treasuryFee <= MAX_TREASURY_FEE, "Treasury fee too high"); treasuryFee = _treasuryFee; emit NewTreasuryFee(currentRound, treasuryFee); } /** * @notice It allows the owner to recover tokens sent to the contract by mistake * @param _token: token address * @param _amount: token amount * @dev Callable by owner */ function recoverToken(address _token, uint256 _amount) external onlyOwner { require(_token != address(token), "Cannot be prediction token address"); IERC20(_token).safeTransfer(address(msg.sender), _amount); emit TokenRecovery(_token, _amount); } /** * @notice Set admin address * @dev Callable by owner */ function setAdmin(address _adminAddress) external onlyOwner { require(_adminAddress != address(0), "Cannot be zero address"); adminAddress = _adminAddress; emit NewAdminAddress(_adminAddress); } /** * @notice Returns round epochs and bet information for a user that has participated * @param user: user address * @param cursor: cursor * @param size: size */ function getUserRounds( address user, uint256 cursor, uint256 size ) external view returns (uint256[] memory, BetInfo[] memory, uint256) { uint256 length = size; if (length > userRounds[user].length - cursor) { length = userRounds[user].length - cursor; } uint256[] memory values = new uint256[](length); BetInfo[] memory betInfo = new BetInfo[](length); for (uint256 i = 0; i < length; i++) { values[i] = userRounds[user][cursor + i]; betInfo[i] = ledger[values[i]][user]; } return (values, betInfo, cursor + length); } /** * @notice Returns round epochs length * @param user: user address */ function getUserRoundsLength(address user) external view returns (uint256) { return userRounds[user].length; } /** * @notice Get the claimable stats of specific epoch and user account * @param epoch: epoch * @param user: user address */ function claimable(uint256 epoch, address user) public view returns (bool) { BetInfo memory betInfo = ledger[epoch][user]; Round memory round = rounds[epoch]; if (round.outcome == Outcome.Draw) { return false; } return round.roundClosed && betInfo.amount != 0 && !betInfo.claimed && ((round.outcome == Outcome.Up && betInfo.position == Position.Bull) || (round.outcome == Outcome.Down && betInfo.position == Position.Bear)); } /** * @notice Calculate rewards for round * @param epoch: epoch */ function _calculateRewards(uint256 epoch) internal { require( rounds[epoch].rewardBaseCalAmount == 0 && rounds[epoch].rewardAmount == 0, "Rewards calculated" ); Round storage round = rounds[epoch]; uint256 rewardBaseCalAmount; uint256 treasuryAmt; uint256 rewardAmount; // Bull wins //todo adjust these to be values from the outcomes enum if (round.outcome == Outcome.Up) { rewardBaseCalAmount = round.bullAmount; treasuryAmt = (round.totalAmount * treasuryFee) / 10000; rewardAmount = round.totalAmount - treasuryAmt; } // Bear wins else if (round.outcome == Outcome.Down) { rewardBaseCalAmount = round.bearAmount; treasuryAmt = (round.totalAmount * treasuryFee) / 10000; rewardAmount = round.totalAmount - treasuryAmt; } // House wins else { rewardBaseCalAmount = 0; rewardAmount = 0; treasuryAmt = round.totalAmount; } round.rewardBaseCalAmount = rewardBaseCalAmount; round.rewardAmount = rewardAmount; // Add to treasury treasuryAmount += treasuryAmt; emit RewardsCalculated( epoch, rewardBaseCalAmount, rewardAmount, treasuryAmt ); } /** * @notice End round * @param epoch: epoch * @param _outcome: winning side of the round */ function _safeEndRound(uint256 epoch, Outcome _outcome) internal { require( block.timestamp >= rounds[epoch].closeTimestamp, "Can only end round after closeTimestamp" ); Round storage round = rounds[epoch]; round.outcome = _outcome; round.roundClosed = true; emit EndRound(epoch, round.outcome); } /** * @notice Determine if a round is valid for receiving bets * Round must have started and not be locked * Current timestamp must be within startTimestamp and closeTimestamp */ function _bettable(uint256 epoch) internal view returns (bool) { return rounds[epoch].startTimestamp != 0 && rounds[epoch].lockTimestamp != 0 && block.timestamp > rounds[epoch].startTimestamp && block.timestamp < rounds[epoch].lockTimestamp; } /** * @notice Returns true if `account` is a contract. * @param account: account address */ function _isContract(address account) internal view returns (bool) { uint256 size; assembly { size := extcodesize(account) } return size > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { 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 (last updated v4.7.0) (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 Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { 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 (last updated v4.8.0) (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() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // 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/extensions/draft-IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-IERC20Permit.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)); } } function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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 (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-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; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IERC20","name":"_token","type":"address"},{"internalType":"address","name":"_adminAddress","type":"address"},{"internalType":"address","name":"_operatorAddress","type":"address"},{"internalType":"uint256","name":"_minBetAmount","type":"uint256"},{"internalType":"uint256","name":"_treasuryFee","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"uint256","name":"round","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"BetBear","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"uint256","name":"round","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"BetBull","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"uint256","name":"round","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claim","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"round","type":"uint256"},{"indexed":false,"internalType":"enum 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PredictionMarket.Outcome","name":"_outcome","type":"uint8"}],"name":"closeRound","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentRound","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"cursor","type":"uint256"},{"internalType":"uint256","name":"size","type":"uint256"}],"name":"getUserRounds","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"},{"components":[{"internalType":"enum PredictionMarket.Position","name":"position","type":"uint8"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"claimed","type":"bool"}],"internalType":"struct PredictionMarket.BetInfo[]","name":"","type":"tuple[]"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUserRoundsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"ledger","outputs":[{"internalType":"enum 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PredictionMarket.Outcome","name":"outcome","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_adminAddress","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minBetAmount","type":"uint256"}],"name":"setMinBetAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_operatorAddress","type":"address"}],"name":"setOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_treasuryFee","type":"uint256"}],"name":"setTreasuryFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_lockTimestamp","type":"uint256"},{"internalType":"uint256","name":"_closeTimestamp","type":"uint256"}],"name":"startNewRound","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasuryAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"treasuryFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"userRounds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000bb9fd9fa4863c03c574007ff3370787b9ce65ff60000000000000000000000009ce5adaad05949d6e1627bfbe2c9a3e67c9c83e30000000000000000000000009ce5adaad05949d6e1627bfbe2c9a3e67c9c83e300000000000000000000000000000000000000000000010f0cf064dd592000000000000000000000000000000000000000000000000000000000000000000064
-----Decoded View---------------
Arg [0] : _token (address): 0xbb9FD9Fa4863C03c574007fF3370787B9cE65ff6
Arg [1] : _adminAddress (address): 0x9Ce5Adaad05949D6E1627bfBE2C9a3e67C9C83E3
Arg [2] : _operatorAddress (address): 0x9Ce5Adaad05949D6E1627bfBE2C9a3e67C9C83E3
Arg [3] : _minBetAmount (uint256): 5000000000000000000000
Arg [4] : _treasuryFee (uint256): 100
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000bb9fd9fa4863c03c574007ff3370787b9ce65ff6
Arg [1] : 0000000000000000000000009ce5adaad05949d6e1627bfbe2c9a3e67c9c83e3
Arg [2] : 0000000000000000000000009ce5adaad05949d6e1627bfbe2c9a3e67c9c83e3
Arg [3] : 00000000000000000000000000000000000000000000010f0cf064dd59200000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000064
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $0.061371 | 391,841.0886 | $24,047.68 |
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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.