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contracts...Drone.sol

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

import "hardhat/console.sol";

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

/**
- NFTs that donated money for Baykar Bayraktar drone to for Ukraine
- Ukraine gets supply
- people feel very good because they have a proof
- in future it could allow for instance travel in Ukraine and visit special places
*/

// https://gateway.pinata.cloud/ipfs/Qmcz9FgVWPSfTpiQYn5NFRsAnbupDZ6wQpA3dYB17cRL6G

contract Drone is ERC721URIStorage {
    // Increase token identificator
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    // notify frontend about new donation
    event Donated(uint256 id, uint256 amount, string tokenURI);

    // create the NFT
    constructor() ERC721("Drone", "DRN") {}

    // hold donated amount
    mapping(address => uint256) private donated;

    // donate amount and get an NFT back
    function donate(uint256 amount, string memory tokenURI) external {
        require(amount > 0, "Please donate more than 0");
        require(bytes(tokenURI).length > 0, "Please set token metadata");

        _tokenIds.increment();

        // get new identifier so nobody else would get it
        uint256 newItemId = _tokenIds.current();

        // mint the NFT
        _mint(msg.sender, newItemId);

        // set token metadata according to ERC721 token standard https://eips.ethereum.org/EIPS/eip-721
        _setTokenURI(newItemId, tokenURI);

        // keep donated amounts
        donated[msg.sender] += amount;

        console.log("Token ID", newItemId);

        // emit event to notify frontend
        emit Donated(newItemId, amount, tokenURI);
    }

    // get donated amount
    function getDonatedAmount() external view returns(uint256) {
        require(donated[msg.sender] > 0, "Not donated yet");

        console.log("Donated", donated[msg.sender]);
        return donated[msg.sender];
    }
}