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Contract Name:
Dice
Compiler Version
v0.8.16+commit.07a7930e
Contract Source Code (Solidity Standard Json-Input format)
// 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: MIT pragma solidity ^0.8.0; interface AggregatorV3Interface { function decimals() external view returns (uint8); function description() external view returns (string memory); function version() external view returns (uint256); // getRoundData and latestRoundData should both raise "No data present" // if they do not have data to report, instead of returning unset values // which could be misinterpreted as actual reported values. function getRoundData(uint80 _roundId) external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); function latestRoundData() external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); }
// 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 // 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 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 (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 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 v4.7.0) (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 v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Multicall.sol) pragma solidity ^0.8.0; import "./Address.sol"; /** * @dev Provides a function to batch together multiple calls in a single external call. * * _Available since v4.1._ */ abstract contract Multicall { /** * @dev Receives and executes a batch of function calls on this contract. */ function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) { results = new bytes[](data.length); for (uint256 i = 0; i < data.length; i++) { results[i] = Address.functionDelegateCall(address(this), data[i]); } return results; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.16; /// @notice Minimal interface for Bank. /// @author Romuald Hog. interface IBank { /// @notice Gets the token's allow status used on the games smart contracts. /// @param token Address of the token. /// @return Whether the token is enabled for bets. function isAllowedToken(address token) external view returns (bool); /// @notice Payouts a winning bet, and allocate the house edge fee. /// @param user Address of the gamer. /// @param token Address of the token. /// @param profit Number of tokens to be sent to the gamer. /// @param fees Bet amount and bet profit fees amount. function payout( address payable user, address token, uint256 profit, uint256 fees ) external payable; /// @notice Accounts a loss bet. /// @dev In case of an ERC20, the bet amount should be transfered prior to this tx. /// @dev In case of the gas token, the bet amount is sent along with this tx. /// @param tokenAddress Address of the token. /// @param amount Loss bet amount. function cashIn(address tokenAddress, uint256 amount) external payable; /// @notice Calculates the max bet amount based on the token balance, the balance risk, and the game multiplier. /// @param token Address of the token. /// @param multiplier The bet amount leverage determines the user's profit amount. 10000 = 100% = no profit. /// @return Maximum bet amount for the token. /// @dev The multiplier should be at least 10000. function getMaxBetAmount(address token, uint256 multiplier) external view returns (uint256); /// @notice Harvests tokens dividends. /// @return tokens The list of tokens addresses. /// @return amounts The list of tokens' amounts harvested. function harvestDividends() external returns (address[] memory tokens, uint256[] memory amounts); /// @notice Get the available tokens dividends amounts. /// @return tokens The list of tokens addresses. /// @return amounts The list of tokens' amounts harvested. function getDividends() external view returns (address[] memory tokens, uint256[] memory amounts); function getVRFSubId(address token) external view returns (uint64); function getTokenOwner(address token) external view returns (address); function getMinBetAmount(address token) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.16; import {Game} from "./Game.sol"; /// @title BetSwirl's Dice game /// @notice The game is played with a 100 sided dice. The game's goal is to guess whether the lucky number will be above your chosen number. /// @author Romuald Hog (based on Yakitori's Dice) contract Dice is Game { /// @notice Full dice bet information struct. /// @param bet The Bet struct information. /// @param diceBet The Dice bet struct information. /// @dev Used to package bet information for the front-end. struct FullDiceBet { Bet bet; DiceBet diceBet; } /// @notice Dice bet information struct. /// @param cap The chosen dice number. /// @param rolled The rolled dice number. struct DiceBet { uint8 cap; uint8 rolled; } /// @notice Maps bets IDs to chosen and rolled dice numbers. mapping(uint256 => DiceBet) public diceBets; /// @notice Emitted after a bet is placed. /// @param id The bet ID. /// @param user Address of the gamer. /// @param token Address of the token. /// @param amount The bet amount. /// @param vrfCost The Chainlink VRF cost paid by player. /// @param cap The chosen dice number. event PlaceBet( uint256 id, address indexed user, address indexed token, uint256 amount, uint256 vrfCost, uint8 cap ); /// @notice Emitted after a bet is rolled. /// @param id The bet ID. /// @param user Address of the gamer. /// @param token Address of the token. /// @param amount The bet amount. /// @param cap The chosen dice number. /// @param rolled The rolled dice number. /// @param payout The payout amount. event Roll( uint256 id, address indexed user, address indexed token, uint256 amount, uint8 cap, uint8 rolled, uint256 payout ); /// @notice Provided cap is not within 1 and 99 included. /// @param minCap The minimum cap. /// @param maxCap The maximum cap. error CapNotInRange(uint8 minCap, uint8 maxCap); /// @notice Initialize the game base contract. /// @param bankAddress The address of the bank. /// @param chainlinkCoordinatorAddress Address of the Chainlink VRF Coordinator. /// @param LINK_ETH_feedAddress Address of the Chainlink LINK/ETH price feed. constructor( address bankAddress, address chainlinkCoordinatorAddress, address LINK_ETH_feedAddress ) Game(bankAddress, chainlinkCoordinatorAddress, 1, LINK_ETH_feedAddress) {} /// @notice Calculates the target payout amount. /// @param betAmount Bet amount. /// @param cap The chosen dice number. /// @return The target payout amount. function _getPayout(uint256 betAmount, uint8 cap) private pure returns (uint256) { return (betAmount * 100) / (100 - cap); } /// @notice Creates a new bet and stores the chosen dice number. /// @param cap The chosen dice number. /// @param token Address of the token. /// @param tokenAmount The number of tokens bet. function wager( uint8 cap, address token, uint256 tokenAmount ) external payable whenNotPaused { /// Dice cap 1 gives 99% chance. /// Dice cap 99 gives 1% chance. if (cap == 0 || cap > 99) { revert CapNotInRange(1, 99); } Bet memory bet = _newBet( token, tokenAmount, _getPayout(10000, cap) ); diceBets[bet.id].cap = cap; emit PlaceBet(bet.id, bet.user, bet.token, bet.amount, bet.vrfCost, cap); } /// @notice Resolves the bet using the Chainlink randomness. /// @param id The bet ID. /// @param randomWords Random words list. Contains only one for this game. // solhint-disable-next-line private-vars-leading-underscore function fulfillRandomWords(uint256 id, uint256[] memory randomWords) internal override { DiceBet storage diceBet = diceBets[id]; Bet storage bet = bets[id]; uint8 rolled = uint8((randomWords[0] % 100) + 1); diceBet.rolled = rolled; uint256 payout = _resolveBet( bet, rolled > diceBet.cap, _getPayout(bet.amount, diceBet.cap) ); emit Roll( bet.id, bet.user, bet.token, bet.amount, diceBet.cap, rolled, payout ); } /// @notice Gets the list of the last user bets. /// @param user Address of the gamer. /// @param dataLength The amount of bets to return. /// @return A list of Dice bet. function getLastUserBets(address user, uint256 dataLength) external view returns (FullDiceBet[] memory) { Bet[] memory lastBets = _getLastUserBets(user, dataLength); FullDiceBet[] memory lastDiceBets = new FullDiceBet[](lastBets.length); for (uint256 i; i < lastBets.length; i++) { lastDiceBets[i] = FullDiceBet( lastBets[i], diceBets[lastBets[i].id] ); } return lastDiceBets; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.16; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; import {Multicall} from "@openzeppelin/contracts/utils/Multicall.sol"; import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol"; import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import {VRFConsumerBaseV2} from "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol"; import {VRFCoordinatorV2Interface} from "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol"; import {AggregatorV3Interface} from "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol"; import {IBank} from "../bank/IBank.sol"; // import "hardhat/console.sol"; interface IVRFCoordinatorV2 is VRFCoordinatorV2Interface { function getFeeConfig() external view returns ( uint32, uint32, uint32, uint32, uint32, uint24, uint24, uint24, uint24 ); } /// @title Game base contract /// @author Romuald Hog /// @notice This should be parent contract of each games. /// It defines all the games common functions and state variables. /// @dev All rates are in basis point. Chainlink VRF v2 is used. abstract contract Game is Ownable, Pausable, Multicall, VRFConsumerBaseV2, ReentrancyGuard { using SafeERC20 for IERC20; /// @notice Bet information struct. /// @param resolved Whether the bet has been resolved. /// @param user Address of the gamer. /// @param token Address of the token. /// @param id Bet ID generated by Chainlink VRF. /// @param amount The bet amount. /// @param blockNumber Block number of the bet used to refund in case Chainlink's callback fail. /// @param payout The payout amount. /// @param vrfCost The Chainlink VRF cost paid by player. struct Bet { bool resolved; address payable user; address token; uint256 id; uint256 amount; uint256 blockNumber; uint256 payout; uint256 vrfCost; } /// @notice Token struct. /// @param houseEdge House edge rate. /// @param pendingCount Number of pending bets. /// @param VRFCallbackGasLimit How much gas is needed in the Chainlink VRF callback. /// @param VRFFees Chainlink's VRF collected fees amount. struct Token { uint16 houseEdge; uint64 pendingCount; uint32 VRFCallbackGasLimit; uint256 VRFFees; } /// @notice Chainlink VRF configuration struct. /// @param requestConfirmations How many confirmations the Chainlink node should wait before responding. /// @param numRandomWords How many random words is needed to resolve a game's bet. /// @param keyHash Hash of the public key used to verify the VRF proof. /// @param chainlinkCoordinator Reference to the VRFCoordinatorV2 deployed contract. struct ChainlinkConfig { uint16 requestConfirmations; uint16 numRandomWords; bytes32 keyHash; IVRFCoordinatorV2 chainlinkCoordinator; } /// @notice Chainlink VRF configuration state. ChainlinkConfig private _chainlinkConfig; /// @notice Chainlink price feed. AggregatorV3Interface private immutable _LINK_ETH_feed; /// @notice Maps bets IDs to Bet information. mapping(uint256 => Bet) public bets; /// @notice Maps users addresses to bets IDs mapping(address => uint256[]) internal _userBets; /// @notice Maps tokens addresses to token configuration. mapping(address => Token) public tokens; /// @notice The bank that manage to payout a won bet and collect a loss bet. IBank public bank; /// @notice Emitted after the bank is set. /// @param bank Address of the bank contract. event SetBank(address bank); /// @notice Emitted after the house edge is set for a token. /// @param token Address of the token. /// @param houseEdge House edge rate. event SetHouseEdge(address indexed token, uint16 houseEdge); /// @notice Emitted after the Chainlink callback gas limit is set for a token. /// @param token Address of the token. /// @param callbackGasLimit New Chainlink VRF callback gas limit. event SetVRFCallbackGasLimit( address indexed token, uint32 callbackGasLimit ); /// @notice Emitted after the Chainlink config is set. /// @param requestConfirmations How many confirmations the Chainlink node should wait before responding. /// @param keyHash Hash of the public key used to verify the VRF proof. event SetChainlinkConfig(uint16 requestConfirmations, bytes32 keyHash); /// @notice Emitted after the bet amount is transfered to the user. /// @param id The bet ID. /// @param user Address of the gamer. /// @param amount Number of tokens refunded. /// @param chainlinkVRFCost The Chainlink VRF cost refunded to player. event BetRefunded( uint256 id, address user, uint256 amount, uint256 chainlinkVRFCost ); /// @notice Emitted after the token's VRF fees amount is transfered to the user. /// @param token Address of the token. /// @param amount Number of tokens refunded. event DistributeTokenVRFFees(address indexed token, uint256 amount); /// @notice Insufficient bet amount. /// @param minBetAmount Bet amount. error UnderMinBetAmount(uint256 minBetAmount); /// @notice Bet provided doesn't exist or was already resolved. error NotPendingBet(); /// @notice Bet isn't resolved yet. error NotFulfilled(); /// @notice House edge is capped at 4%. error ExcessiveHouseEdge(); /// @notice Token is not allowed. error ForbiddenToken(); /// @notice Chainlink price feed not working /// @param linkWei LINK/ETH price returned. error InvalidLinkWeiPrice(int256 linkWei); /// @notice The msg.value is not enough to cover Chainlink's fee. error WrongGasValueToCoverFee(); /// @notice Reverting error when sender isn't allowed. error AccessDenied(); /// @notice Reverting error when provided address isn't valid. error InvalidAddress(); /// @notice Reverting error when bet resolution cost refund to user failed. error BetVRFCostRefundFailed(); /// @notice Reverting error when token has pending bets. error TokenHasPendingBets(); /// @notice Initialize contract's state variables and VRF Consumer. /// @param bankAddress The address of the bank. /// @param chainlinkCoordinatorAddress Address of the Chainlink VRF Coordinator. /// @param numRandomWords How many random words is needed to resolve a game's bet. /// @param LINK_ETH_feedAddress Address of the Chainlink LINK/ETH price feed. constructor( address bankAddress, address chainlinkCoordinatorAddress, uint16 numRandomWords, address LINK_ETH_feedAddress ) VRFConsumerBaseV2(chainlinkCoordinatorAddress) { if ( LINK_ETH_feedAddress == address(0) || chainlinkCoordinatorAddress == address(0) ) { revert InvalidAddress(); } require( numRandomWords != 0 && numRandomWords <= 500, "Wrong Chainlink NumRandomWords" ); setBank(IBank(bankAddress)); _chainlinkConfig.chainlinkCoordinator = IVRFCoordinatorV2( chainlinkCoordinatorAddress ); _chainlinkConfig.numRandomWords = numRandomWords; _LINK_ETH_feed = AggregatorV3Interface(LINK_ETH_feedAddress); } /// @notice Calculates the amount's fee based on the house edge. /// @param token Address of the token. /// @param amount From which the fee amount will be calculated. /// @return The fee amount. function _getFees(address token, uint256 amount) private view returns (uint256) { return (tokens[token].houseEdge * amount) / 10000; } /// @notice Creates a new bet and request randomness to Chainlink, /// transfer the ERC20 tokens to the contract or refund the bet amount overflow if the bet amount exceed the maxBetAmount. /// @param tokenAddress Address of the token. /// @param tokenAmount The number of tokens bet. /// @param multiplier The bet amount leverage determines the user's profit amount. 10000 = 100% = no profit. /// @return A new Bet struct information. function _newBet( address tokenAddress, uint256 tokenAmount, uint256 multiplier ) internal whenNotPaused nonReentrant returns (Bet memory) { Token storage token = tokens[tokenAddress]; if ( bank.isAllowedToken(tokenAddress) == false || token.houseEdge == 0 ) { revert ForbiddenToken(); } address user = msg.sender; bool isGasToken = tokenAddress == address(0); uint256 fee = isGasToken ? (msg.value - tokenAmount) : msg.value; uint256 betAmount = isGasToken ? msg.value - fee : tokenAmount; // Charge user for Chainlink VRF fee. { uint256 chainlinkVRFCost = getChainlinkVRFCost(tokenAddress); if (fee < (chainlinkVRFCost - ((10 * chainlinkVRFCost) / 100))) { // 5% slippage. revert WrongGasValueToCoverFee(); } token.VRFFees += fee; } // Bet amount is capped. { uint256 minBetAmount = bank.getMinBetAmount(tokenAddress); if (betAmount < minBetAmount) { revert UnderMinBetAmount(minBetAmount); } uint256 maxBetAmount = bank.getMaxBetAmount( tokenAddress, multiplier ); if (betAmount > maxBetAmount) { if (isGasToken) { payable(user).transfer(betAmount - maxBetAmount); } betAmount = maxBetAmount; } } // Create bet uint256 id = _chainlinkConfig.chainlinkCoordinator.requestRandomWords( _chainlinkConfig.keyHash, bank.getVRFSubId(tokenAddress), _chainlinkConfig.requestConfirmations, token.VRFCallbackGasLimit, _chainlinkConfig.numRandomWords ); Bet memory newBet = Bet( false, payable(user), tokenAddress, id, betAmount, block.number, 0, fee ); _userBets[user].push(id); bets[id] = newBet; token.pendingCount++; // If ERC20, transfer the tokens if (!isGasToken) { IERC20(tokenAddress).safeTransferFrom( user, address(this), betAmount ); } return newBet; } /// @notice Resolves the bet based on the game child contract result. /// In case bet is won, the bet amount minus the house edge is transfered to user from the game contract, and the profit is transfered to the user from the Bank. /// In case bet is lost, the bet amount is transfered to the Bank from the game contract. /// @param bet The Bet struct information. /// @param wins Whether the bet is winning. /// @param payout What should be sent to the user in case of a won bet. Payout = bet amount + profit amount. /// @return The payout amount. /// @dev Should not revert as it resolves the bet with the randomness. function _resolveBet( Bet storage bet, bool wins, uint256 payout ) internal returns (uint256) { if (bet.resolved == true || bet.user == address(0)) { revert NotPendingBet(); } bet.resolved = true; address token = bet.token; tokens[token].pendingCount--; uint256 betAmount = bet.amount; bool isGasToken = bet.token == address(0); // Check for the result if (wins) { address payable user = bet.user; uint256 profit = payout - betAmount; uint256 betAmountFee = _getFees(token, betAmount); uint256 profitFee = _getFees(token, profit); uint256 fee = betAmountFee + profitFee; payout -= fee; uint256 betAmountPayout = betAmount - betAmountFee; uint256 profitPayout = profit - profitFee; // Transfer the bet amount payout to the player if (isGasToken) { user.transfer(betAmountPayout); } else { IERC20(token).safeTransfer(user, betAmountPayout); // Transfer the bet amount fee to the bank. IERC20(token).safeTransfer(address(bank), betAmountFee); } // Transfer the payout from the bank, the bet amount fee to the bank, and account fees. bank.payout{value: isGasToken ? betAmountFee : 0}( user, token, profitPayout, fee ); } else { payout = 0; if (!isGasToken) { IERC20(token).safeTransfer(address(bank), betAmount); } bank.cashIn{value: isGasToken ? betAmount : 0}(token, betAmount); } bet.payout = payout; return payout; } /// @notice Gets the list of the last user bets. /// @param user Address of the gamer. /// @param dataLength The amount of bets to return. /// @return A list of Bet. function _getLastUserBets(address user, uint256 dataLength) internal view returns (Bet[] memory) { uint256[] memory userBetsIds = _userBets[user]; uint256 betsLength = userBetsIds.length; if (betsLength < dataLength) { dataLength = betsLength; } Bet[] memory userBets = new Bet[](dataLength); if (dataLength != 0) { uint256 userBetsIndex; for (uint256 i = betsLength; i > betsLength - dataLength; i--) { userBets[userBetsIndex] = bets[userBetsIds[i - 1]]; userBetsIndex++; } } return userBets; } /// @notice Sets the game house edge rate for a specific token. /// @param token Address of the token. /// @param houseEdge House edge rate. /// @dev The house edge rate couldn't exceed 4%. function setHouseEdge(address token, uint16 houseEdge) external onlyOwner { if (houseEdge > 400) { revert ExcessiveHouseEdge(); } if (hasPendingBets(token)) { revert TokenHasPendingBets(); } tokens[token].houseEdge = houseEdge; emit SetHouseEdge(token, houseEdge); } /// @notice Pauses the contract to disable new bets. function pause() external onlyOwner { if (paused()) { _unpause(); } else { _pause(); } } /// @notice Sets the Chainlink VRF V2 configuration. /// @param requestConfirmations How many confirmations the Chainlink node should wait before responding. /// @param keyHash Hash of the public key used to verify the VRF proof. function setChainlinkConfig(uint16 requestConfirmations, bytes32 keyHash) external onlyOwner { _chainlinkConfig.requestConfirmations = requestConfirmations; _chainlinkConfig.keyHash = keyHash; emit SetChainlinkConfig(requestConfirmations, keyHash); } /// @notice Sets the Chainlink VRF V2 configuration. /// @param callbackGasLimit How much gas is needed in the Chainlink VRF callback. function setVRFCallbackGasLimit(address token, uint32 callbackGasLimit) external onlyOwner { tokens[token].VRFCallbackGasLimit = callbackGasLimit; emit SetVRFCallbackGasLimit(token, callbackGasLimit); } /// @notice Distributes the token's collected Chainlink fees. /// @param token Address of the token. function withdrawTokensVRFFees(address token) external { uint256 tokenChainlinkFees = tokens[token].VRFFees; if (tokenChainlinkFees != 0) { delete tokens[token].VRFFees; payable(bank.getTokenOwner(token)).transfer(tokenChainlinkFees); emit DistributeTokenVRFFees(token, tokenChainlinkFees); } } /// @notice Refunds the bet to the user if the Chainlink VRF callback failed. /// @param id The Bet ID. function refundBet(uint256 id) external nonReentrant { Bet storage bet = bets[id]; if (bet.resolved == true) { revert NotPendingBet(); } else if (block.number < bet.blockNumber + 30) { revert NotFulfilled(); } Token storage token = tokens[bet.token]; token.pendingCount--; bet.resolved = true; bet.payout = bet.amount; if (bet.token == address(0)) { payable(bet.user).transfer(bet.amount); } else { IERC20(bet.token).safeTransfer(bet.user, bet.amount); } uint256 chainlinkVRFCost = bet.vrfCost; if ( token.VRFFees >= chainlinkVRFCost && address(this).balance >= chainlinkVRFCost ) { token.VRFFees -= chainlinkVRFCost; payable(bet.user).transfer(chainlinkVRFCost); emit BetRefunded(id, bet.user, bet.amount, chainlinkVRFCost); } else { revert BetVRFCostRefundFailed(); } } /// @notice Returns the Chainlink VRF config. /// @param requestConfirmations How many confirmations the Chainlink node should wait before responding. /// @param keyHash Hash of the public key used to verify the VRF proof. /// @param chainlinkCoordinator Reference to the VRFCoordinatorV2 deployed contract. function getChainlinkConfig() external view returns ( uint16 requestConfirmations, bytes32 keyHash, IVRFCoordinatorV2 chainlinkCoordinator ) { return ( _chainlinkConfig.requestConfirmations, _chainlinkConfig.keyHash, _chainlinkConfig.chainlinkCoordinator ); } /// @notice Returns whether the token has pending bets. /// @return Whether the token has pending bets. function hasPendingBets(address token) public view returns (bool) { return tokens[token].pendingCount != 0; } /// @notice Sets the Bank contract. /// @param _bank Address of the Bank contract. function setBank(IBank _bank) public onlyOwner { if (address(_bank) == address(0)) { revert InvalidAddress(); } bank = _bank; emit SetBank(address(_bank)); } /// @notice Returns the amount of ETH that should be passed to the wager transaction. /// to cover Chainlink VRF fee. /// @return The bet resolution cost amount. function getChainlinkVRFCost(address token) public view returns (uint256) { (, int256 weiPerUnitLink, , , ) = _LINK_ETH_feed.latestRoundData(); if (weiPerUnitLink <= 0) { revert InvalidLinkWeiPrice(weiPerUnitLink); } // Get Chainlink VRF v2 fee amount. ( uint32 fulfillmentFlatFeeLinkPPMTier1, , , , , , , , ) = _chainlinkConfig.chainlinkCoordinator.getFeeConfig(); // 115000 gas is the average Verification gas of Chainlink VRF. return (tx.gasprice * (115000 + tokens[token].VRFCallbackGasLimit)) + ((1e12 * uint256(fulfillmentFlatFeeLinkPPMTier1) * uint256(weiPerUnitLink)) / 1e18); } }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 8000 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
[{"inputs":[{"internalType":"address","name":"bankAddress","type":"address"},{"internalType":"address","name":"chainlinkCoordinatorAddress","type":"address"},{"internalType":"address","name":"LINK_ETH_feedAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AccessDenied","type":"error"},{"inputs":[],"name":"BetVRFCostRefundFailed","type":"error"},{"inputs":[{"internalType":"uint8","name":"minCap","type":"uint8"},{"internalType":"uint8","name":"maxCap","type":"uint8"}],"name":"CapNotInRange","type":"error"},{"inputs":[],"name":"ExcessiveHouseEdge","type":"error"},{"inputs":[],"name":"ForbiddenToken","type":"error"},{"inputs":[],"name":"InvalidAddress","type":"error"},{"inputs":[{"internalType":"int256","name":"linkWei","type":"int256"}],"name":"InvalidLinkWeiPrice","type":"error"},{"inputs":[],"name":"NotFulfilled","type":"error"},{"inputs":[],"name":"NotPendingBet","type":"error"},{"inputs":[{"internalType":"address","name":"have","type":"address"},{"internalType":"address","name":"want","type":"address"}],"name":"OnlyCoordinatorCanFulfill","type":"error"},{"inputs":[],"name":"TokenHasPendingBets","type":"error"},{"inputs":[{"internalType":"uint256","name":"minBetAmount","type":"uint256"}],"name":"UnderMinBetAmount","type":"error"},{"inputs":[],"name":"WrongGasValueToCoverFee","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"chainlinkVRFCost","type":"uint256"}],"name":"BetRefunded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DistributeTokenVRFFees","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"vrfCost","type":"uint256"},{"indexed":false,"internalType":"uint8","name":"cap","type":"uint8"}],"name":"PlaceBet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint8","name":"cap","type":"uint8"},{"indexed":false,"internalType":"uint8","name":"rolled","type":"uint8"},{"indexed":false,"internalType":"uint256","name":"payout","type":"uint256"}],"name":"Roll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"bank","type":"address"}],"name":"SetBank","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"requestConfirmations","type":"uint16"},{"indexed":false,"internalType":"bytes32","name":"keyHash","type":"bytes32"}],"name":"SetChainlinkConfig","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint16","name":"houseEdge","type":"uint16"}],"name":"SetHouseEdge","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint32","name":"callbackGasLimit","type":"uint32"}],"name":"SetVRFCallbackGasLimit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[],"name":"bank","outputs":[{"internalType":"contract IBank","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"bets","outputs":[{"internalType":"bool","name":"resolved","type":"bool"},{"internalType":"address payable","name":"user","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"uint256","name":"payout","type":"uint256"},{"internalType":"uint256","name":"vrfCost","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"diceBets","outputs":[{"internalType":"uint8","name":"cap","type":"uint8"},{"internalType":"uint8","name":"rolled","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChainlinkConfig","outputs":[{"internalType":"uint16","name":"requestConfirmations","type":"uint16"},{"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"internalType":"contract IVRFCoordinatorV2","name":"chainlinkCoordinator","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"getChainlinkVRFCost","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"dataLength","type":"uint256"}],"name":"getLastUserBets","outputs":[{"components":[{"components":[{"internalType":"bool","name":"resolved","type":"bool"},{"internalType":"address payable","name":"user","type":"address"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"blockNumber","type":"uint256"},{"internalType":"uint256","name":"payout","type":"uint256"},{"internalType":"uint256","name":"vrfCost","type":"uint256"}],"internalType":"struct Game.Bet","name":"bet","type":"tuple"},{"components":[{"internalType":"uint8","name":"cap","type":"uint8"},{"internalType":"uint8","name":"rolled","type":"uint8"}],"internalType":"struct Dice.DiceBet","name":"diceBet","type":"tuple"}],"internalType":"struct Dice.FullDiceBet[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"hasPendingBets","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"requestId","type":"uint256"},{"internalType":"uint256[]","name":"randomWords","type":"uint256[]"}],"name":"rawFulfillRandomWords","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"refundBet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IBank","name":"_bank","type":"address"}],"name":"setBank","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"requestConfirmations","type":"uint16"},{"internalType":"bytes32","name":"keyHash","type":"bytes32"}],"name":"setChainlinkConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint16","name":"houseEdge","type":"uint16"}],"name":"setHouseEdge","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint32","name":"callbackGasLimit","type":"uint32"}],"name":"setVRFCallbackGasLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"tokens","outputs":[{"internalType":"uint16","name":"houseEdge","type":"uint16"},{"internalType":"uint64","name":"pendingCount","type":"uint64"},{"internalType":"uint32","name":"VRFCallbackGasLimit","type":"uint32"},{"internalType":"uint256","name":"VRFFees","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"cap","type":"uint8"},{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"wager","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"withdrawTokensVRFFees","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000003f6bcd0761871ce301cac4c7984b0105adb737ce0000000000000000000000007a1bac17ccc5b313516c5e16fb24f7659aa5ebed00000000000000000000000012162c3e810393dec01362abf156d7ecf6159528
-----Decoded View---------------
Arg [0] : bankAddress (address): 0x3f6bcd0761871ce301cac4c7984b0105adb737ce
Arg [1] : chainlinkCoordinatorAddress (address): 0x7a1bac17ccc5b313516c5e16fb24f7659aa5ebed
Arg [2] : LINK_ETH_feedAddress (address): 0x12162c3e810393dec01362abf156d7ecf6159528
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000003f6bcd0761871ce301cac4c7984b0105adb737ce
Arg [1] : 0000000000000000000000007a1bac17ccc5b313516c5e16fb24f7659aa5ebed
Arg [2] : 00000000000000000000000012162c3e810393dec01362abf156d7ecf6159528
Age | Block | Fee Address | BC Fee Address | Voting Power | Jailed | Incoming |
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