Require ERC721_a to hold ERC721_b

Smart Contracts
, ,
1

Using the wizard how could I achieve this.

Basically I want to FORCE the user to OWN an ERC721 to hold future ERC721, ERC1155 and ERC20 in my ecosystem.

Only problem is that the ERC721 is already created, so I would like to check if msg.sender has >= 1 of 0x000000 (erc721), or fail

Does anybody have an idea?

2

Cast the address of your erc721 contract as IERC721 on the new contract and call balance method with user address

 IERC721 nft721 = IERC721(addresscontract);
 uint256 balance= nft721.balanceOf(msg.sender);

You can define the IERC721 as property of your contract if you want, so you don't need to cast it anymore.

3

I am not be the smartest developer, or experienced....

I tried this;

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

import "@openzeppelin/contracts/access/Ownable.sol";

import "@openzeppelin/contracts/utils/Counters.sol";

contract NFT2 is ERC721, Ownable {

using Counters for Counters.Counter;

Counters.Counter private _tokenIdCounter;

constructor() ERC721("MyToken", "MTK") {}

function safeMint(address to) public onlyOwner {

    uint256 tokenId = _tokenIdCounter.current();

    _tokenIdCounter.increment();

    _safeMint(to, tokenId);

}



 IERC721 nft721 = IERC721(0xf8e81D47203A594245E36C48e151709F0C19fBe8);

 uint256 balance= nft721.balanceOf(msg.sender);

}

Above is NFT2 and the IERC721(0xf8e81.....) is NFT 1, but I am able to own these (both) on any wallet I try to send the minted NFT's to?

What am I missing here?

4

I don't know why you try to achieve maybe this