721Royalty.sol

gistfile1.txt

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppellin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract ERC721RestrictedMarkets is Ownable, ERC721 {

    mapping(address => bool) private _approvedMarketplaces;

    function approve(address to, uint256 tokenId) public virtual override {
        require(_approvedMarketplaces[to], "Invalid Marketplace");
        super.approve(to, tokenId);
    }

    function setApprovalForAll(address operator, bool approved) public virtual override {
        require(_approvedMarketplaces[operator], "Invalid Marketplace");
        super.setApprovalForAll(operator, approved);
    }

    function setApprovedMarketplace(address market, bool approved) public onlyOwner {
        _approvedMarketplaces[market] = approved;
    }
}

How do we get marketplace address?