SubscriptionMarketplace

{{
  "language": "Solidity",
  "sources": {
    "SubscriptionEscrow.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract SubscriptionMarketplace is ReentrancyGuard {
    uint256 constant BASE_PRICE = 0.001 ether;
    
    uint256 public totalSold = 0;
    address public platformOwner;
    address public escrowWallet;
    
    struct Listing {
        address seller;
        address owner;
        uint256 createdAt;
        bool active;
    }
    
    struct Purchase {
        address buyer;
        address seller;
        uint256 price;
        uint256 timestamp;
    }
    
    mapping(bytes32 => Listing) public listings;
    mapping(bytes32 => Purchase) public purchases;
    
    event Listed(bytes32 indexed itemTX, address indexed seller, address indexed owner);
    event Purchased(bytes32 indexed itemTX, address indexed buyer, address indexed seller, uint256 price);
    event Delisted(bytes32 indexed itemTX, address indexed seller);
    
    constructor(address _escrowWallet) {
        platformOwner = msg.sender;
        escrowWallet = _escrowWallet;
    }
    
    function getCurrentPrice() public view returns (uint256) {
        uint256 price = BASE_PRICE;
        for (uint256 i = 0; i < totalSold; i++) {
            price = (price * 11) / 10;
        }
        return price;
    }
    
    function createListing(bytes32 itemTX, address itemOwner) external {
        require(!listings[itemTX].active, "Already listed");
        require(itemTX != bytes32(0), "Invalid item");
        require(msg.sender == itemOwner, "Not owner");
        
        listings[itemTX] = Listing({
            seller: msg.sender,
            owner: itemOwner,
            createdAt: block.timestamp,
            active: true
        });
        
        emit Listed(itemTX, msg.sender, itemOwner);
    }
    
    function purchase(bytes32 itemTX, address buyer) external payable nonReentrant {
        Listing storage listing = listings[itemTX];
        require(listing.active, "Not for sale");
        require(listing.seller != address(0), "Invalid seller");
        
        uint256 price = getCurrentPrice();
        require(msg.value == price, "Wrong price");
        
        address seller = listing.seller;
        
        listing.active = false;
        totalSold++;
        
        purchases[itemTX] = Purchase({
            buyer: buyer,
            seller: seller,
            price: price,
            timestamp: block.timestamp
        });
        
        uint256 sellerAmount = (price * 98) / 100;
        (bool success, ) = payable(seller).call{value: sellerAmount}("");
        require(success, "Seller transfer failed");
        
        emit Purchased(itemTX, buyer, seller, price);
    }
    
    function delist(bytes32 itemTX) external {
        Listing storage listing = listings[itemTX];
        require(listing.seller == msg.sender, "Not seller");
        require(listing.active, "Not active");
        
        listing.active = false;
        emit Delisted(itemTX, msg.sender);
    }
    
    receive() external payable {}
}"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// 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;
    }
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}