setTokenURI방식으로 Minting

 

// SPDX-License-Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";

contract testToken is ERC721, ERC721Enumerable, ERC721URIStorage, ERC721Pausable, Ownable, ERC721Burnable {
    uint256 private _nextTokenId;
    mapping(string => uint256) public _mintedCounts;

    constructor(address initialOwner)
        ERC721("TEST TOKEN", "TTK")
        Ownable(initialOwner)
    {}

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }

    function setMintedCount(string calldata mintType, uint256 count) public onlyOwner {
        _mintedCounts[mintType] = count;
    }

    function safeMint(address to, string memory uri) public onlyOwner {
        uint256 tokenId = _nextTokenId++;
        _safeMint(to, tokenId);
        _setTokenURI(tokenId, uri);
        _mintedCounts[uri]++;
    }

    // The following functions are overrides required by Solidity.

    function _update(address to, uint256 tokenId, address auth)
        internal
        override(ERC721, ERC721Enumerable, ERC721Pausable)
        returns (address)
    {
        return super._update(to, tokenId, auth);
    }

    function _increaseBalance(address account, uint128 value)
        internal
        override(ERC721, ERC721Enumerable)
    {
        super._increaseBalance(account, value);
    }

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

    function supportsInterface(bytes4 interfaceId)
        public
        view
        override(ERC721, ERC721Enumerable, ERC721URIStorage)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }
}

 

위 코드는 NFT 컬렉션내에서 Minting을 계속 하는 코드가 아니라 정해져있는 카테고리(3개의 메타데이터를 가지고 여러개씩 발행)의 같은 NFT들을 여러명에게 발행해주기 위해 만든 코드입니다. 그래서 baseURI가 아니라 setTokenURI방식을 택하여 Minting을 구현하였습니다.