NFT that is a social graph where ID holders can add new ID holders through overridden transfers

SocialGraphNFT.sol

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import "https://github.com/Rari-Capital/solmate/blob/audit-fixes/src/tokens/ERC721.sol";

/// @notice NFT that is a social graph where ID holders can add new ID holders.
contract SocialGraphNFT is ERC721("Social Graph NFT", "SGNFT") {
    string public baseURI;

    uint256 public tokenIdCounter;

    constructor(string memory baseURI_) {
        baseURI = baseURI_;

        _mint(msg.sender, tokenIdCounter++);
    }

    function tokenURI(uint256) public view override returns (string memory) {
        return baseURI;
    }

    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public override {
        _check(from, id);

        _mint(to, tokenIdCounter++);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public override {
        _check(from, id);

        _mint(to, tokenIdCounter++);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes memory data
    ) public override {
        _check(from, id);

        _safeMint(to, tokenIdCounter++, data);
    }

    function _check(address from, uint256 id) internal view {
        require(from == ownerOf[id], "NOT_OWNER");

        require(
            msg.sender == from || msg.sender == getApproved[id] || isApprovedForAll[from][msg.sender],
            "NOT_APPROVED"
        );
    }
}