What are NFTs? How to implement it using Golang?

With the continuous development of blockchain technology, more and more people are paying attention to NFT, which is a non-fungible token. As an efficient, safe, and easy-to-learn programming language, Golang is also constantly being applied to the development of blockchain technology. This article will introduce how to use Golang to implement NFT.

1. What is NFT

NFT is a digital asset based on blockchain technology. Each NFT has its uniqueness, uniqueness and irreplaceability. Different from traditional digital assets, NFT can represent the uniqueness and ownership of digital assets such as virtual items, digital artworks, game props, audio and video, etc.

2. Overview of Golang

Golang (also known as Go language) is an open source programming language developed by Google in 2009. The main features of Golang language are easy to learn, efficient and safe. The Golang language not only has the characteristics of a low-level language similar to the C language, but also can well support the programming of distributed systems.

3. NFT implementation process

1. Build a development environment

First you need to install the Golang environment. You can download the corresponding installation package from the official website for installation. After the installation is completed, you can set up the Golang development environment.

2. Introduce dependency packages

In Golang, you can use third-party dependency packages to implement NFT. Among them, friends can use the "go-ethereum" Ethereum development framework to achieve it. It can be introduced into the project through the following command:

go get -u github.com/ethereum/go-ethereum

3. Define the contract

In Golang, NFT can be implemented through Solidity contracts. The specific implementation process can be achieved through the following code:

pragma solidity >=0.4.24 <0.7.0;

import "github.com/ethereum/go-ethereum/common";
import "github.com/ethereum/go-ethereum/core/types";

interface ERC721TokenReceiver {

function onERC721Received(address _operator, address _from, uint256 _tokenId, bytes calldata _data) external returns(bytes4);

}

interface ERC721Enumerable {

function totalSupply() external view returns (uint256);
function tokenByIndex(uint256 _index) external view returns (uint256);
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);

}

interface ERC721Metadata {

function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 _tokenId) external view returns (string memory);

}

interface ERC721 {

event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 indexed _tokenId);
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);

function balanceOf(address _owner) external view returns (uint256);
function ownerOf(uint256 _tokenId) external view returns (address);
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes calldata _data) external payable;
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external payable;
function transferFrom(address _from, address _to, uint256 _tokenId) external payable;
function approve(address _approved, uint256 _tokenId) external payable;
function setApprovalForAll(address _operator, bool _approved) external;
function isApprovedForAll(address _owner, address _operator) external view returns (bool);

}

contract NFT is ERC721, ERC721Metadata , ERC721Enumerable {

// ...

}

When defining a contract, you need to implement the three interfaces ERC721, ERC721Metadata and ERC721Enumerable, and customize the contract logic according to business needs.

4. Write logic code

Write the logic code of NFT, which needs to realize the minting, transfer and destruction functions of tokens. When implementing these functions, the contracts defined above need to be used.

// Mint tokens
function mint(address _to, uint256 _tokenId) public {

_mint(_to, _tokenId);

}

// Transfer tokens
function transfer( address _to, uint256 _tokenId) public {

require(_to != address(0));
require(_to != address(this));
_transfer(msg.sender, _to, _tokenId);

}

// Burn token
function burn(uint256 _tokenId) public {

_burn(msg.sender, _tokenId);

}

At the same time, operations such as token query, batch transfer, and token owner query can also be implemented in the logic code.

4. Summary

The above is the basic process of using Golang to implement NFT. Golang not only makes NFT development more efficient, but also improves the security and stability of NFT. At the same time, the application of NFT will also be more extensive, providing better protection for digital assets and intellectual property rights. I believe that there will be more technologies and platforms to support the development of NFT in the future.

The above is the detailed content of What are NFTs? How to implement it using Golang?. For more information, please follow other related articles on the PHP Chinese website!