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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

contract SilksPaymentsV1 is Ownable {
    struct Sale {
        string saleId;
        uint price;
        bool paused;
        uint maxPerTx;
        uint maxPerWallet;
        bool valid;
    }
    
    struct Receipt {
        address buyer;
        string saleId;
        uint quantity;
        uint pricePer;
        uint total;
    }
    
    event Purchase(uint receiptId);

    mapping(uint => string) public SaleIndexToId;
    mapping(uint => address) public ReceiptToBuyer;

    mapping(string => Sale) internal sales;
    mapping(uint => Receipt) internal receipts;
    mapping(string => uint) internal numPurchases;
    mapping(address => mapping(string => uint)) internal numPurchasesByAddress;
    
    uint public saleCount;
    uint public receiptCount;
    
    using SafeMath for uint;
    
    string public name = "Silks - Payments V1";
    
    constructor(){}
    
    function getSale(
        string calldata _saleId
    )
    public
    view
    returns (
        uint price,
        bool paused,
        uint maxPerTx,
        uint maxPerWallet,
        bool valid
    ) {
        return (
        sales[_saleId].price,
        sales[_saleId].paused,
        sales[_saleId].maxPerTx,
        sales[_saleId].maxPerWallet,
        sales[_saleId].valid
        );
    }
    
    function setSale(
        string calldata _saleId,
        uint _price,
        bool _paused,
        uint _maxPerTx,
        uint _maxPerWallet,
        bool _valid
    )
    external
    onlyOwner
    {
        if (!sales[_saleId].valid){
            SaleIndexToId[saleCount] = _saleId;
            saleCount++;
        }
        
        sales[_saleId] = Sale(
            _saleId,
            _price,
            _paused,
            _maxPerTx,
            _maxPerWallet,
            _valid
        );
    }
    
    function getReceipt(
        uint _receiptId
    )
    public
    view
    returns (
        address buyer,
        string memory saleId,
        uint quantity,
        uint pricePer,
        uint total
    ) {
        return (
        receipts[_receiptId].buyer,
        receipts[_receiptId].saleId,
        receipts[_receiptId].quantity,
        receipts[_receiptId].pricePer,
        receipts[_receiptId].total
        );
    }
    
    function purchase(
        string calldata _saleId,
        uint _quantity
    )
    public
    payable
    returns(uint)
    {
        (uint price, bool paused, uint maxPerTx, uint maxPerWallet, bool valid) = getSale(_saleId);
        require(
            valid && !paused,
            "NOT_VALID_OR_PAUSED"
        );
        require(
            msg.value % price == 0 &&
            ((msg.value / price) * price == msg.value),
            "INV_ETH_TOTAL"
        );
        require(
            (msg.value / price) == _quantity,
            "INV_QUANTITY"
        );
        require(
            maxPerTx == 0 || (msg.value / price) <= maxPerTx,
            "PER_TX_ERROR"
        );
        require(
            maxPerWallet == 0 || (_quantity + numPurchasesByAddress[msg.sender][_saleId]) <= maxPerWallet,
            "PER_WALLET_ERROR"
        );

        numPurchases[_saleId]++;
        
        receiptCount++;
        receipts[receiptCount] = Receipt(
            msg.sender,
            _saleId,
            _quantity,
            price,
            msg.value);
        ReceiptToBuyer[receiptCount] = msg.sender;
        
        emit Purchase(receiptCount);
        
        return receiptCount;
    }
    
    // Get amount of 1155 minted
    function getNumPurchasesForSale(
        string calldata _saleId
    )
    view
    public
    returns(uint)
    {
        return numPurchases[_saleId];
    }
    
    function getNumPurchasesByBuyer(
        address buyer,
        string calldata _saleId
    )
    view
    public
    returns(uint)
    {
        return numPurchasesByAddress[buyer][_saleId];
    }
    
    // Basic withdrawal of funds function in order to transfer ETH out of the smart contract
    function withdrawFunds()
    public
    onlyOwner
    {
        payable(msg.sender).transfer(address(this).balance);
    }
}

// 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 v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"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":"uint256","name":"receiptId","type":"uint256"}],"name":"Purchase","type":"event"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"ReceiptToBuyer","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"SaleIndexToId","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"buyer","type":"address"},{"internalType":"string","name":"_saleId","type":"string"}],"name":"getNumPurchasesByBuyer","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_saleId","type":"string"}],"name":"getNumPurchasesForSale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_receiptId","type":"uint256"}],"name":"getReceipt","outputs":[{"internalType":"address","name":"buyer","type":"address"},{"internalType":"string","name":"saleId","type":"string"},{"internalType":"uint256","name":"quantity","type":"uint256"},{"internalType":"uint256","name":"pricePer","type":"uint256"},{"internalType":"uint256","name":"total","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_saleId","type":"string"}],"name":"getSale","outputs":[{"internalType":"uint256","name":"price","type":"uint256"},{"internalType":"bool","name":"paused","type":"bool"},{"internalType":"uint256","name":"maxPerTx","type":"uint256"},{"internalType":"uint256","name":"maxPerWallet","type":"uint256"},{"internalType":"bool","name":"valid","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_saleId","type":"string"},{"internalType":"uint256","name":"_quantity","type":"uint256"}],"name":"purchase","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"receiptCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"saleCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_saleId","type":"string"},{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"bool","name":"_paused","type":"bool"},{"internalType":"uint256","name":"_maxPerTx","type":"uint256"},{"internalType":"uint256","name":"_maxPerWallet","type":"uint256"},{"internalType":"bool","name":"_valid","type":"bool"}],"name":"setSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawFunds","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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