Hello, World!

In this smart we will learn how can we make the nft  smart contract from basics   . So let's start

Pre requiste

1. Kowledge  of the basics of the Solidity
2. Know how  to use the remix

Code :

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";

contract FirstNft is ERC721, ERC721URIStorage, Ownable {
    using Counters for Counters.Counter;
    uint public MINT_PRICE = 0.05 ether;
    uint public MAX_SUPPLY = 100;
    Counters.Counter private _tokenIdCounter;
    constructor() ERC721("FirstNft", "FNFT") {}

    function _baseURI() internal pure override returns (string memory) {
        return "ipfs://FirstNFT/";
    }

    function safeMint(address to, string memory uri) public payable{

        // require(totalSupply()<MAX_SUPPLY,"Price is less than  the expected");

        require(msg.value>=MINT_PRICE,"Price is less than  the expected");
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
        _setTokenURI(tokenId, uri);
    }

    // The following functions are overrides required by Solidity.

    function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
        super._burn(tokenId);
    }

    function tokenURI(uint256 tokenId)
        public
        view
        override(ERC721, ERC721URIStorage)
        returns (string memory)
    {
        return super.tokenURI(tokenId);
    }
  
}

Working

There are lot's of function in  thiis code some of the important were as follows

1. By using the symbol function we can see our symbol coin
2. Token uri : By this we can see the token base id
3. Owner of : For the particular Token you can see the Adress which owns it
4. Safe mint : By this anyone can mint the nft
5. safeTransferFrom : You can send particukar address token (nft) to the other address  .