Distance less than 80 days in 2021, DeFi class project also slowly began to decline, but it lasted for DeFi NTF, NTF actually is not a new concept, if you are a coin ring early birds, so you must be more or less heard CryptoKitties (mystery love cats), Etheremon (Ethernet small monster world) and Etherbots (ether), the popular game on the etheric lane, they belong to the nature of the NFT,

01
What is the NFT
NFT is Non - Fungible Token, the Chinese called (Non homogeneous tokens), usually is refers to the developer in the etheric fang platform based on ERC721 standards/agreement issued by tokens, its characteristic is inseparable, irreplaceable, unique, in simple terms, using ERC721 standard/protocol and the issue of tokens is called NFT,

With CryptoKitties (mystery love cat) the game as an example, the game's cat can't be replaced by each other, assume that zhang has a yellow cat, value $two hundred, and flowers with a blue cat with wings, value $four hundred,



Blue cat with wings and yellow cat, and two encryption cat cannot replace each other, if joba chamberlain had a $, floret also have a $, one yuan can be replaced by any $$, chamberlain and floret swap one $, they get $is still the same one, but the cat is not, after exchange is quite long, the value is different also, this is the uniqueness and irreplaceability of NFT so-called NFT with COINS, etheric currency difference is here, each NFT has its independent value, and each of the COINS or etheric currency value is equal,

NFT is the most important characteristics for an integral, an Ethernet cat cannot split exchange, exchange or only whole sale, segmentation, there is no value, of course it can't break up, and BTC or WDC can be partitioned, get the BTC or 1 WDC can slice two, two 0.5 or WDC BTC, two 0.5 or WDC BTC still have 1 or the value of the WDC BTC,

02
Characteristics of NFT (non homogeneous tokens)
1
Standardized
Standardization of NFT has some functions, including ownership, transfer, etc., all non homogeneous tokens has these functions, any developer can use this function to build their own NFT,
2
General
NFT is common, that is to say, all want to use the application of NFT can use it, because the chain of blocks is openly accessible, and everyone can read the deployment of the intelligence of NFT contracts,
3
Liquidity
Associated with encryption asset liquidity of the market is very large, they can easily according to the requirements of their cash or other encryption currency, therefore, NFT has high liquidity,
4
Invariance
Block chain known for invariance, NFT is through intelligent implementation of contract, which makes the NFT immutable, namely users cannot be NFT changed to other NFT, NFT will permanently recorded in block in the chain of ownership, unless the user decides to be transferred to other users,
5
Programmable
NFT are implemented through intelligent contracts, NFT tokens can be enhanced and contain other complex functions,

03
NFT (non homogeneous tokens)
1
ERC721
It was originally created by CryptoKitties, is also the first standard of digital assets on behalf of the homogeneity, ERC721 is inheritable Solidity intelligent standard contract, people can easily inherited from OpenZeppelin libraries, and use it to programming based on the project of NFT,
2
ERC1155
It first put forward by Enjin, it can make people realize half homogeneity tokens, ERC1155 permitted to own unique asset classes, rather than with unique assets, these assets connected to ID, for example, an ID can be 20 called "Swords" assets, and the other a ID can have 30 assets, called "Guns"
3
Metadata
Metadata is used to define the only characteristic of a single tokens, encryption cats, for example, each encrypted cat has different color, shape, name, etc., usually in the form of JSON metadata performance
4
Chain
Each NFT in this case, with each metadata links, and stored in blocks in the chain, the biggest drawback is the storage space is limited in the etheric fang,
5
Under the chain
In this case, the metadata stored in the centralized system (AWS) or decentralized network (such as IPFS), and through the intelligent contract tokenURI parameters of the links to their respective NFT,

04
The using range of NFT (non homogeneous tokens)
1
The collection
NFT by encrypting the cat made its debut in the field of collection, after encryption cat popular game, NFT become Axie Infinity many other popular choice in the field of the collection, such as
2
The game
Players to take the time to get in-game rewards, but these rewards can't be used outside the game, on the basis of block chain NFT is solved this problem, because other games can integrate these rewards,
3
Certificate
NFT can be used to identify the only certificate issued to individuals, usually, based on the certificate of NFT is non-transferable, these certificates are stored in the chain of blocks, thus cannot be tampered with,

Encryption has emerged more and more in the field of NFT standards, their different functions, the realization of NFT scope is limited to the developer's imagination, in the end, Wisdom Chain has upgraded the script programming ability to contract, you can also in Wisdom Chain Chain issue NFT tokens,