Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)
pragma solidity ^0.8.0;
import "./OwnableUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides 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} and {acceptOwnership}.
*
* This module is used through inheritance. It will make available all functions
* from parent (Ownable).
*/
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
address private _pendingOwner;
event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
function __Ownable2Step_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable2Step_init_unchained() internal onlyInitializing {
}
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
return _pendingOwner;
}
/**
* @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual override onlyOwner {
_pendingOwner = newOwner;
emit OwnershipTransferStarted(owner(), newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual override {
delete _pendingOwner;
super._transferOwnership(newOwner);
}
/**
* @dev The new owner accepts the ownership transfer.
*/
function acceptOwnership() public virtual {
address sender = _msgSender();
require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
_transferOwnership(sender);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_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. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```solidity
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
*
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
* constructor.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: setting the version to 255 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized != type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint8) {
return _initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _initializing;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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 PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @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.
*/
function __Pausable_init() internal onlyInitializing {
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal onlyInitializing {
_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());
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @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 ReentrancyGuardUpgradeable is Initializable {
// 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;
function __ReentrancyGuard_init() internal onlyInitializing {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal onlyInitializing {
_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;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [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://consensys.net/diligence/blog/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/v0.8.0/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 (last updated v4.9.4) (utils/Context.sol)
pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @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 ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
import "../interfaces/IGame.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/Ownable2StepUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "../interfaces/IUniversalCashier.sol";
contract DuckRace is IGame, PausableUpgradeable, Ownable2StepUpgradeable, ReentrancyGuardUpgradeable {
// References
address public proxyManager;
IUniversalCashier public cashier;
// Game Configuration
uint256 public constant PLAY_COST = 1 ether; // 1 S per duck
uint256 public constant MIN_PLAYERS = 2;
uint256 public constant MAX_PLAYERS = 100;
uint256 public constant COMMIT_DURATION = 60 seconds;
uint256 public constant RACE_DURATION = 60 seconds;
uint256 public constant COOLDOWN_DURATION = 60 seconds;
// Prize distribution
uint256 public constant WINNER_SHARE = 90; // 90% to winner
uint256 public constant DEV_SHARE = 10; // 10% to dev
uint256 public totalFees; // Accumulated dev fees
enum RaceState {
Waiting, // Waiting for minimum players
Committing, // Accepting commits for 60s
Racing, // Race in progress for 60s
Completed, // Race completed
Cooldown // 60s cooldown before next race
}
struct PreCommitment {
uint256 ducksPerRace;
uint256 racesRemaining;
bytes32 commitHash;
bytes32 salt;
}
// Game State
struct Race {
uint256 startTime;
uint256 commitDeadline;
uint256 raceDeadline;
uint256 cooldownEnds;
uint256 totalPrize;
address winner;
RaceState state;
uint256 playerCount;
mapping(address => bytes32) commitments;
mapping(address => uint256) reveals;
mapping(address => bool) hasRevealed;
mapping(address => uint256) duckCounts;
address[] players;
}
uint256 public currentRaceId;
mapping(uint256 => Race) public races;
mapping(address => PreCommitment) public preCommitments;
// Random number generation
uint256 private nonce;
// Events
event RaceCreated(uint256 indexed raceId);
event CommitPhaseStarted(uint256 indexed raceId, uint256 deadline);
event RaceStarted(uint256 indexed raceId, uint256 deadline);
event RaceCompleted(uint256 indexed raceId, address winner, uint256 prize);
event PlayerCommitted(uint256 indexed raceId, address indexed player, uint256 duckCount);
event PreCommitmentSet(address indexed player, uint256 ducksPerRace, uint256 races);
event FeeWithdrawn(uint256 amount);
event PaymentProcessed(address indexed player, uint256 amount);
event PaymentFailed(address indexed player, uint256 amount, string reason);
function initialize(address _proxyManager, address _cashier) public initializer {
__Pausable_init();
__Ownable2Step_init();
__ReentrancyGuard_init();
proxyManager = _proxyManager;
cashier = IUniversalCashier(_cashier);
currentRaceId = 0;
}
// Pre-commit to multiple races
function setPreCommitment(
uint256 ducksPerRace,
uint256 numberOfRaces,
bytes32 commitHash,
bytes32 salt
) external whenNotPaused nonReentrant {
require(ducksPerRace > 0 && ducksPerRace <= 10, "Invalid duck count");
require(numberOfRaces > 0 && numberOfRaces <= 100, "Invalid race count");
uint256 totalCost = PLAY_COST * ducksPerRace * numberOfRaces;
require(cashier.getBalance(msg.sender) >= totalCost, "Insufficient balance");
// Lock the funds
cashier.lockBalance(msg.sender, totalCost);
preCommitments[msg.sender] = PreCommitment({
ducksPerRace: ducksPerRace,
racesRemaining: numberOfRaces,
commitHash: commitHash,
salt: salt
});
emit PreCommitmentSet(msg.sender, ducksPerRace, numberOfRaces);
}
// Auto-process pre-commitments
function processPreCommitments() external whenNotPaused nonReentrant {
PreCommitment storage pc = preCommitments[msg.sender];
require(pc.racesRemaining > 0, "No pre-commitments");
require(pc.ducksPerRace > 0, "Invalid pre-commitment");
// Calculate cost
uint256 cost = PLAY_COST * pc.ducksPerRace;
// Try to debit the player through cashier
bool success = cashier.debitPlayer(msg.sender, cost);
require(success, "Payment failed");
// Get current race
if (currentRaceId == 0 || races[currentRaceId].state == RaceState.Completed) {
_createNewRace();
}
Race storage race = races[currentRaceId];
require(race.state == RaceState.Waiting || race.state == RaceState.Committing,
"Race not accepting commits");
require(race.playerCount < MAX_PLAYERS, "Race full");
// Add player to race
if (race.duckCounts[msg.sender] == 0) {
race.players.push(msg.sender);
race.playerCount++;
}
race.commitments[msg.sender] = keccak256(abi.encodePacked(pc.commitHash, pc.salt, msg.sender));
race.duckCounts[msg.sender] += pc.ducksPerRace;
race.totalPrize += cost;
// Start commit phase if minimum players reached
if (race.playerCount >= MIN_PLAYERS && race.state == RaceState.Waiting) {
_startCommitPhase(currentRaceId);
}
pc.racesRemaining--;
if (pc.racesRemaining == 0) {
delete preCommitments[msg.sender];
}
emit PlayerCommitted(currentRaceId, msg.sender, pc.ducksPerRace);
emit PaymentProcessed(msg.sender, cost);
}
// Reveal phase
function reveal(uint256 seed, bytes32 salt) external nonReentrant whenNotPaused {
Race storage race = races[currentRaceId];
require(race.state == RaceState.Racing, "Not reveal phase");
require(!race.hasRevealed[msg.sender], "Already revealed");
bytes32 computedHash = keccak256(abi.encodePacked(seed, salt, msg.sender));
require(computedHash == race.commitments[msg.sender], "Invalid reveal");
race.reveals[msg.sender] = seed;
race.hasRevealed[msg.sender] = true;
}
function finalize(uint256 raceId) external whenNotPaused nonReentrant {
Race storage race = races[raceId];
require(race.state == RaceState.Racing, "Race not in progress");
require(block.timestamp > race.raceDeadline, "Race still in progress");
// Calculate combined seed from all reveals
bytes32 combinedSeed;
uint256 revealCount;
for (uint256 i = 0; i < race.players.length; i++) {
address player = race.players[i];
if (race.hasRevealed[player]) {
combinedSeed ^= bytes32(race.reveals[player]);
revealCount++;
}
}
require(revealCount >= MIN_PLAYERS, "Not enough reveals");
// Generate winner
uint256 randomNumber = uint256(keccak256(abi.encodePacked(
combinedSeed,
block.prevrandao,
block.timestamp
)));
// Weight by duck count
uint256 totalDucks;
for (uint256 i = 0; i < race.players.length; i++) {
if (race.hasRevealed[race.players[i]]) {
totalDucks += race.duckCounts[race.players[i]];
}
}
uint256 winningNumber = randomNumber % totalDucks;
uint256 currentSum;
// Find winner
for (uint256 i = 0; i < race.players.length; i++) {
address player = race.players[i];
if (race.hasRevealed[player]) {
currentSum += race.duckCounts[player];
if (winningNumber < currentSum) {
race.winner = player;
break;
}
}
}
// Distribute prize
if (race.winner != address(0)) {
uint256 winnerPrize = (race.totalPrize * WINNER_SHARE) / 100;
uint256 devFee = race.totalPrize - winnerPrize;
totalFees += devFee;
cashier.creditPlayer(race.winner, winnerPrize);
emit RaceCompleted(raceId, race.winner, winnerPrize);
}
race.state = RaceState.Cooldown;
race.cooldownEnds = block.timestamp + COOLDOWN_DURATION;
}
// Admin functions
function withdrawFees() external onlyOwner {
uint256 amount = totalFees;
totalFees = 0;
(bool success, ) = owner().call{value: amount}("");
require(success, "Fee transfer failed");
emit FeeWithdrawn(amount);
}
function _createNewRace() private {
currentRaceId++;
Race storage race = races[currentRaceId];
race.startTime = block.timestamp;
race.state = RaceState.Waiting;
emit RaceCreated(currentRaceId);
}
function _startCommitPhase(uint256 raceId) private {
Race storage race = races[raceId];
race.state = RaceState.Committing;
race.commitDeadline = block.timestamp + COMMIT_DURATION;
emit CommitPhaseStarted(raceId, race.commitDeadline);
}
function _startRace(uint256 raceId) private {
Race storage race = races[raceId];
race.state = RaceState.Racing;
race.raceDeadline = block.timestamp + RACE_DURATION;
emit RaceStarted(raceId, race.raceDeadline);
}
// View functions
function getCurrentRaceState() external view returns (
uint256 raceId,
RaceState state,
uint256 playerCount,
uint256 totalPrize,
uint256 deadline
) {
Race storage race = races[currentRaceId];
deadline = race.state == RaceState.Committing ? race.commitDeadline :
race.state == RaceState.Racing ? race.raceDeadline :
race.state == RaceState.Cooldown ? race.cooldownEnds : 0;
return (
currentRaceId,
race.state,
race.playerCount,
race.totalPrize,
deadline
);
}
function getRacePlayerInfo(uint256 raceId, address player) external view returns (
uint256 duckCount,
bool hasCommitted,
bool isWinner
) {
Race storage race = races[raceId];
return (
race.duckCounts[player],
race.duckCounts[player] > 0,
race.winner == player
);
}
// Add the play function implementation
function play(address player, uint256 amount) external payable override {
require(msg.sender == proxyManager, "Only proxy manager");
require(amount >= PLAY_COST, "Minimum 1 duck");
uint256 duckCount = amount / PLAY_COST;
require(duckCount <= 10, "Maximum 10 ducks per play");
if (currentRaceId == 0 || races[currentRaceId].state == RaceState.Completed) {
_createNewRace();
}
Race storage race = races[currentRaceId];
require(race.state == RaceState.Waiting || race.state == RaceState.Committing,
"Race not accepting commits");
require(race.playerCount < MAX_PLAYERS, "Race full");
if (race.duckCounts[player] == 0) {
race.players.push(player);
race.playerCount++;
}
race.duckCounts[player] += duckCount;
race.totalPrize += amount;
// Start commit phase if minimum players reached
if (race.playerCount >= MIN_PLAYERS && race.state == RaceState.Waiting) {
_startCommitPhase(currentRaceId);
}
emit PlayerCommitted(currentRaceId, player, duckCount);
}
// Add function to update cashier address (if needed)
function setCashier(address _cashier) external onlyOwner {
require(_cashier != address(0), "Invalid cashier address");
cashier = IUniversalCashier(_cashier);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
interface IGame {
function play(address player, uint256 amount) external payable;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
interface IUniversalCashier {
// Core functions
function deposit() external payable;
function withdraw(uint256 amount) external;
function getBalance(address player) external view returns (uint256);
// Game interactions
function debitPlayer(address player, uint256 amount) external returns (bool);
function creditPlayer(address player, uint256 amount) external;
// Balance locking
function lockBalance(address player, uint256 amount) external;
function unlockBalance(address player, uint256 amount) external;
function getLockedBalance(address player) external view returns (uint256);
function getAvailableBalance(address player) external view returns (uint256);
// Game authorization
function authorizeGame(address game) external;
function unauthorizeGame(address game) external;
// Admin
function setTreasury(address _treasury) external;
}