Contract Name:
MetacadeTournament
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../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.
*
* The initial owner is set to the address provided by the deployer. 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;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @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 {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @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 {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_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 v5.0.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @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 value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` 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 value) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)
pragma solidity ^0.8.20;
/**
* @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;
/**
* @dev Unauthorized reentrant call.
*/
error ReentrancyGuardReentrantCall();
constructor() {
_status = NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be NOT_ENTERED
if (_status == ENTERED) {
revert ReentrancyGuardReentrantCall();
}
// 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
interface IERC20Extended is IERC20 {
function decimals() external view returns (uint8);
}
contract MetacadeTournament is Ownable(msg.sender), ReentrancyGuard {
address public updater;
uint256 private constant CBR_SCALE_FACTOR = 10 ** 6;
constructor(address _updater) {
updater = _updater;
}
struct Tournament {
IERC20 paymentToken;
bool isActive;
uint256 gameId;
uint256 startedAtBlock;
uint256 creditBurnRate;
uint256 baseCreditCost;
Shareholder[] shareholders;
CreditPackageType creditPackages;
}
mapping(uint256 => Tournament) public tournaments;
mapping(address => mapping(uint256 => uint256))
public claimablePrizesForTournament;
mapping(uint256 => uint256) public prizePools;
mapping(uint256 => WinnerInfo[]) public tournamentWinners;
struct WinnerInfo {
address winner;
uint256 amount;
}
struct Shareholder {
address wallet;
uint256 share;
}
struct CreditPackageType {
uint256 tier1;
uint256 tier2;
uint256 tier3;
}
event TournamentCreated(
uint256 indexed tournamentId,
address paymentToken,
uint256 creditBurnRate,
uint256 baseCreditCost,
uint256 gameId
);
event PrizePoolFunded(
uint256 indexed tournamentId,
address funder,
uint256 amount
);
event TournamentStarted(uint256 indexed tournamentId, uint256 timestamp);
event TournamentEnded(uint256 indexed tournamentId, uint256 timestamp);
event CreditPurchased(
uint256 indexed tournamentId,
uint256 gameId,
address buyer,
address paymentToken,
uint256 amount
);
event Claimed(
uint256 indexed tournamentId,
address claimer,
uint256 amount,
address paymentToken
);
event WinnersUpdated(uint256 indexed tournamentId);
modifier onlyUpdater() {
require(msg.sender == updater, "Not authorized");
_;
}
function updateUpdater(address _updater) external onlyOwner {
updater = _updater;
}
function getTournamentWinners(
uint256 tournamentId
) external view returns (WinnerInfo[] memory) {
return tournamentWinners[tournamentId];
}
function getTournamentShareholder(
uint256 tournamentId,
uint256 shareholderIndex
) external view returns (address, uint256) {
Shareholder memory shareholder = tournaments[tournamentId].shareholders[
shareholderIndex
];
return (shareholder.wallet, shareholder.share);
}
function getTournamentCreditPackageType(
uint256 tournamentId
) external view returns (CreditPackageType memory) {
CreditPackageType memory creditPackages = tournaments[tournamentId]
.creditPackages;
return creditPackages;
}
function createTournament(
uint256 tournamentId,
uint256 gameId,
uint256 creditBurnRate,
uint256 baseCreditCost,
address paymentTokenAddress,
Shareholder[] memory _shareholders,
CreditPackageType memory _creditPackages
) external onlyOwner {
require(
tournaments[tournamentId].paymentToken == IERC20(address(0)),
"Tournament already exists"
);
require(
creditBurnRate >= 0,
"Credit Burn Rate should be greater than or equal to 0"
);
require(
baseCreditCost >= 0,
"Base Credit Cost should be greater than or equal to 0"
);
require(
gameId > 0,
"Tournament must be associated with a certain game identifier"
);
uint256 totalShare = 0;
for (uint256 i = 0; i < _shareholders.length; i++) {
require(_shareholders[i].share > 0, "Share must be greater than 0");
totalShare += _shareholders[i].share;
}
require(totalShare == 100, "Total share must be exactly 100");
Shareholder[] storage allShareholders = tournaments[tournamentId]
.shareholders;
for (uint256 i = 0; i < _shareholders.length; i++) {
allShareholders.push(_shareholders[i]);
}
uint256 scaledCBR = creditBurnRate * CBR_SCALE_FACTOR;
IERC20 paymentToken = IERC20(paymentTokenAddress);
Tournament storage tournament = tournaments[tournamentId];
tournament.paymentToken = paymentToken;
tournament.baseCreditCost = baseCreditCost;
tournament.gameId = gameId;
tournament.isActive = false;
tournament.creditBurnRate = scaledCBR;
tournament.startedAtBlock = 0;
tournament.creditPackages = _creditPackages;
emit TournamentCreated(
tournamentId,
paymentTokenAddress,
creditBurnRate,
baseCreditCost,
gameId
);
}
function startTournament(uint256 tournamentId) external onlyOwner {
Tournament storage tournament = tournaments[tournamentId];
require(!tournament.isActive, "Tournament already active");
require(tournament.gameId > 0, "Tournament does not exist");
tournament.isActive = true;
tournament.startedAtBlock = block.number;
emit TournamentStarted(tournamentId, block.timestamp);
}
function fundPrizePool(
uint256 tournamentId,
uint256 tokenAmount
) external payable {
Tournament storage tournament = tournaments[tournamentId];
require(tournament.isActive, "Tournament is not active.");
uint256 fundedAmount;
if (tournament.paymentToken == IERC20(address(0))) {
require(msg.value > 0, "Ether amount must be greater than 0");
prizePools[tournamentId] += msg.value;
fundedAmount = msg.value;
} else {
require(tokenAmount > 0, "Token amount must be greater than 0");
require(msg.value == 0, "Do not send Ether for ERC20 funding");
require(
tournament.paymentToken.transferFrom(
msg.sender,
address(this),
tokenAmount
),
"Token transfer to contract failed"
);
prizePools[tournamentId] += tokenAmount;
fundedAmount = tokenAmount;
}
emit PrizePoolFunded(tournamentId, msg.sender, fundedAmount);
}
function swapForCredits(
uint256 tournamentId,
uint256 gameId,
uint256 creditTier,
address beneficiary
) external payable nonReentrant {
require(beneficiary != address(0), "Invalid beneficiary address");
Tournament storage tournament = tournaments[tournamentId];
require(tournament.isActive, "Tournament is paused");
require(gameId == tournament.gameId, "Invalid game id");
uint256 tokenAmount;
if (creditTier == 1) {
tokenAmount = tournament.creditPackages.tier1;
} else if (creditTier == 2) {
tokenAmount = tournament.creditPackages.tier2;
} else if (creditTier == 3) {
tokenAmount = tournament.creditPackages.tier3;
} else {
revert("Invalid credit tier");
}
if (tournament.paymentToken == IERC20(address(0))) {
require(msg.value == tokenAmount, "Incorrect Ether amount");
} else {
require(msg.value == 0, "This tournament does not accept Ether");
require(
tournament.paymentToken.transferFrom(
msg.sender,
address(this),
tokenAmount
),
"ERC20 token transfer failed"
);
}
distributeTokens(tournamentId, tokenAmount);
emit CreditPurchased(
tournamentId,
gameId,
beneficiary,
address(tournament.paymentToken),
tokenAmount
);
}
function distributeTokens(
uint256 tournamentId,
uint256 tokenAmount
) internal {
Tournament storage tournament = tournaments[tournamentId];
for (uint256 i = 0; i < tournament.shareholders.length; i++) {
Shareholder memory shareholder = tournament.shareholders[i];
uint256 shareholderAmount = (tokenAmount * shareholder.share) / 100;
if (tournament.paymentToken == IERC20(address(0))) {
if (shareholder.wallet == address(this)) {
prizePools[tournamentId] += shareholderAmount;
} else {
(bool sent, ) = shareholder.wallet.call{
value: shareholderAmount
}("");
require(sent, "Failed to send Ether");
}
} else {
if (shareholder.wallet == address(this)) {
require(
tournament.paymentToken.transfer(
address(this),
shareholderAmount
),
"Token transfer to contract failed"
);
prizePools[tournamentId] += shareholderAmount;
} else {
require(
tournament.paymentToken.transfer(
shareholder.wallet,
shareholderAmount
),
"Token transfer to shareholder failed"
);
}
}
}
}
function updateWinners(
uint256 tournamentId,
address[] calldata winnerAddresses,
uint256[] calldata amountsInWei
) external onlyUpdater {
require(
winnerAddresses.length == amountsInWei.length,
"Address and amount arrays must match"
);
Tournament storage tournament = tournaments[tournamentId];
require(!tournament.isActive, "Tournament must be ended first");
delete tournamentWinners[tournamentId];
uint256 totalAmount = 0;
for (uint256 i = 0; i < winnerAddresses.length; i++) {
tournamentWinners[tournamentId].push(
WinnerInfo({
winner: winnerAddresses[i],
amount: amountsInWei[i]
})
);
claimablePrizesForTournament[winnerAddresses[i]][
tournamentId
] += amountsInWei[i];
totalAmount += amountsInWei[i];
}
// Ensure the total amount being claimed does not exceed the prize pool
require(
totalAmount <= prizePools[tournamentId],
"Total amount exceeds prize pool"
);
emit WinnersUpdated(tournamentId);
}
function endTournament(uint256 tournamentId) external onlyOwner {
Tournament storage tournament = tournaments[tournamentId];
require(tournament.isActive, "Tournament has not started");
tournament.isActive = false;
emit TournamentEnded(tournamentId, block.timestamp);
}
function withdrawToken(
address tokenAddress,
uint256 amount
) external onlyOwner {
require(amount > 0, "Amount must be greater than 0");
if (tokenAddress == address(0)) {
require(
address(this).balance >= amount,
"Insufficient Ether balance"
);
(bool sent, ) = msg.sender.call{value: amount}("");
require(sent, "Failed to send Ether");
} else {
// Withdrawal request for an ERC20 token
IERC20 token = IERC20(tokenAddress);
uint256 contractBalance = token.balanceOf(address(this));
require(contractBalance >= amount, "Insufficient token balance");
require(
token.transfer(msg.sender, amount),
"Token transfer failed"
);
}
}
function claim(uint256 tournamentId) external nonReentrant {
uint256 claimAmount = claimablePrizesForTournament[msg.sender][
tournamentId
];
require(claimAmount > 0, "No claimable amount");
claimablePrizesForTournament[msg.sender][tournamentId] = 0;
Tournament storage tournament = tournaments[tournamentId];
if (address(tournament.paymentToken) == address(0)) {
(bool sent, ) = msg.sender.call{value: claimAmount}("");
require(sent, "Failed to send Ether");
} else {
require(
tournament.paymentToken.transfer(msg.sender, claimAmount),
"Token transfer failed"
);
}
emit Claimed(
tournamentId,
msg.sender,
claimAmount,
address(tournament.paymentToken)
);
}
}