creation_sourcecode: // File: @openzeppelin/contracts/security/ReentrancyGuard.sol
  
  
  // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
  
  pragma solidity ^0.8.0;
  
  /**
   * @dev Contract module that helps prevent reentrant calls to a function.
   *
   * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
   * available, which can be applied to functions to make sure there are no nested
   * (reentrant) calls to them.
   *
   * Note that because there is a single `nonReentrant` guard, functions marked as
   * `nonReentrant` may not call one another. This can be worked around by making
   * those functions `private`, and then adding `external` `nonReentrant` entry
   * points to them.
   *
   * TIP: If you would like to learn more about reentrancy and alternative ways
   * to protect against it, check out our blog post
   * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
   */
  abstract contract ReentrancyGuard {
      // Booleans are more expensive than uint256 or any type that takes up a full
      // word because each write operation emits an extra SLOAD to first read the
      // slot's contents, replace the bits taken up by the boolean, and then write
      // back. This is the compiler's defense against contract upgrades and
      // pointer aliasing, and it cannot be disabled.
  
      // The values being non-zero value makes deployment a bit more expensive,
      // but in exchange the refund on every call to nonReentrant will be lower in
      // amount. Since refunds are capped to a percentage of the total
      // transaction's gas, it is best to keep them low in cases like this one, to
      // increase the likelihood of the full refund coming into effect.
      uint256 private constant _NOT_ENTERED = 1;
      uint256 private constant _ENTERED = 2;
  
      uint256 private _status;
  
      constructor() {
          _status = _NOT_ENTERED;
      }
  
      /**
       * @dev Prevents a contract from calling itself, directly or indirectly.
       * Calling a `nonReentrant` function from another `nonReentrant`
       * function is not supported. It is possible to prevent this from happening
       * by making the `nonReentrant` function external, and making it call a
       * `private` function that does the actual work.
       */
      modifier nonReentrant() {
          _nonReentrantBefore();
          _;
          _nonReentrantAfter();
      }
  
      function _nonReentrantBefore() private {
          // On the first call to nonReentrant, _status will be _NOT_ENTERED
          require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
  
          // Any calls to nonReentrant after this point will fail
          _status = _ENTERED;
      }
  
      function _nonReentrantAfter() private {
          // By storing the original value once again, a refund is triggered (see
          // https://eips.ethereum.org/EIPS/eip-2200)
          _status = _NOT_ENTERED;
      }
  
      /**
       * @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;
      }
  }
  
  // File: @openzeppelin/contracts/utils/Context.sol
  
  
  // 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;
      }
  }
  
  // File: @openzeppelin/contracts/access/Ownable.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
  
  pragma solidity ^0.8.20;
  
  
  /**
   * @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);
      }
  }
  
  // File: contracts/paymentHandler.sol
  
  
  pragma solidity ^0.8.20;
  
  
  
  contract paymentHandler is Ownable, ReentrancyGuard {
  
      address public fundsHandler;
      uint public totalMinted;
  
      //mappings
      mapping(uint => uint) public tierLeftover;
      mapping (uint => uint) public tierMaxSupply;
      mapping(uint => uint) public tierToPrice;
      mapping (address => uint) public userMinted;
      mapping (address => uint) public rewardsEarned;
      mapping(address => mapping(uint=> uint)) public userTierLeftover;
      mapping(address => string) public referralCodes;
      mapping(string => address) public codeToAddress;
      mapping (address => bool) public isInitialized;
      
      //events
      event paymentReceived(address indexed minter, uint256 amount, uint quantity, string refCode);
      event Refer(address indexed referrer, address indexed referee, uint tokenId, uint referralRewards);
  
      constructor(address initialOwner) 
          Ownable(initialOwner) {}
      
  
      function mint(uint quantity, string memory refCode) public payable nonReentrant {
          
          if(!isInitialized[msg.sender]){
              initializeUser(msg.sender);
          }
          require(msg.value == calcPrice(quantity, msg.sender, refCode), "Low value sent");
          uint finalPayment = msg.value;
  
          if (codeToAddress[refCode] != address(0)) {
              address referrer = codeToAddress[refCode];
              uint referRewards = msg.value * 10 / 100;
              finalPayment = finalPayment * 90 / 100;
              (bool referSuccess, ) = payable(referrer).call{value: referRewards}("");
              require(referSuccess, "Payment failed");
              rewardsEarned[referrer]+= referRewards;
              emit Refer(referrer, msg.sender, quantity, referRewards);
          }
  
          (bool success, ) = payable(fundsHandler).call{value: finalPayment}("");
          require(success, "Payment failed");
          deductMint(quantity,msg.sender);
          userMinted[msg.sender] += quantity;
          totalMinted += quantity;
          emit paymentReceived( msg.sender, finalPayment, quantity, refCode );
      }
  
      // Core logic set functions
      function setTiers(uint tier, uint totalAllocated, uint priceTier) external onlyOwner {
          require(tier >0 && tier <= 15 && priceTier >= 0.075 ether);
          tierLeftover[tier] = totalAllocated;
          tierMaxSupply[tier] = totalAllocated;
          tierToPrice[tier] = priceTier;
      }
  
      function setReferralCode(string[] memory code, address[] memory wallet) external  onlyOwner {
          require(code.length == wallet.length);
          for (uint i = 0; i< code.length; i++) {
              referralCodes[wallet[i]] = code[i];
              codeToAddress[code[i]] = wallet[i];
          }
      }
  
      function setFundsHandler(address _newFundsHandler) external onlyOwner{
          require(_newFundsHandler != address(0), "Invalid address");
          fundsHandler = _newFundsHandler;
      }
      
      //internal functions
      function initializeUser(address userToInit) internal {
          require(!isInitialized[userToInit]);
          for(uint i=1; i<=15; i++) {
              userTierLeftover[userToInit][i] = i;
              if(i == 5) {
                  userTierLeftover[userToInit][i] = 0;
              }
          }
          isInitialized[userToInit] = !isInitialized[userToInit];
      }
  
      function deductMint(uint amount, address minter) internal {
          require(isInitialized[minter]);
          require(maxMintable(minter) >= amount);
          uint remAmount = amount;   
          for (uint256 i = 1; i <= 15; i++) {
              if(tierLeftover[i] >= userTierLeftover[minter][i] ) {
                  if(remAmount >= userTierLeftover[minter][i]) {
                      tierLeftover[i] -= userTierLeftover[minter][i];
                      remAmount -= userTierLeftover[minter][i];
                      userTierLeftover[minter][i] = 0;
                  }
                  else{
                      userTierLeftover[minter][i] -= remAmount;
                      tierLeftover[i] -= remAmount;
                      remAmount = 0;
                      break;
                  }
              }
              else {
                  userTierLeftover[minter][i] -= tierLeftover[i];
                  
                  remAmount -= tierLeftover[i];
                  tierLeftover[i] = 0;
              }
          }
      }
  
      
  
      
  
      //view functions
      function calcPrice(uint amount, address minter, string memory refCode) public view returns (uint) {
          require(isInitialized[minter]);
          require(maxMintable(minter) >= amount);
          uint price;
          uint remAmount = amount;
          uint finalPrice;    
          for (uint256 i = 1; i <= 15; i++) {
              
              if(tierLeftover[i] >= userTierLeftover[minter][i] ) {
                  if(remAmount >= userTierLeftover[minter][i]) {
                      price += tierToPrice[i] * userTierLeftover[minter][i];
                      remAmount -= userTierLeftover[minter][i];
                  }
                  
                  else {
                      price += tierToPrice[i] * remAmount;
                      remAmount = 0;
                      break;
                  }
  
              }
              else {
                  price += tierToPrice[i] * (tierLeftover[i]);
                  remAmount -= tierLeftover[i];
              }
          }
          finalPrice = price;
          if(codeToAddress[refCode] != address(0)) {
              finalPrice = finalPrice * 90 / 100;
          }
          return finalPrice;
      }
  
      function maxMintable(address userToCheck) public view returns(uint) {
          uint maxMint;
          if (!isInitialized[userToCheck]) {
              for(uint i = 1; i<= 15; i++) {
                  if(tierLeftover[i]>=i) {
                      maxMint += i;
                  }
                  else {
                      maxMint += tierLeftover[i];
                  }
              }
          }
          else {
              for(uint i = 1; i<= 15; i++) {
                  if(userTierLeftover[userToCheck][i] > tierLeftover[i]) {
                      maxMint += tierLeftover[i];
                  }
                  else{
                      maxMint += userTierLeftover[userToCheck][i]; 
                  }
              }
          }
          return maxMint;
      }
  
  }