We all know , When trading in the secondary market in the encryption field , We usually use USDT Standard for price conversion , So much like USDT\USDC This centrally guaranteed dollar stable currency has become the most influential crypto asset transaction settlement unit in the industry . But when we came NFT Asset related secondary trading market , What we see and participate in , Most of them are based on ETH Transaction settlement for standard , Only a few Metaverse Assets to SAND\MANA\DAI And so on .
NFT The trading market mainly uses ETH How did the situation of standard trading come into being ? This is the one I participated in before Twitter Space A question asked by the host , I will try to explain this problem in this article today , For reference only .
Before I answer that question , Let's talk about 「 to grant authorization 」 The concept , of 「 to grant authorization 」 operation , Many new Ethereum users will encounter when operating smart contracts for the first time , Most of them are confused . Do not understand what is authorized operation , I don't understand why authorization should initiate a transaction , And the transaction itself does not carry any assets , At the same time, I have to pay a miner's fee .
To be precise , Authorization operations include 2 Step :
The first 1 Step : Authorization transaction itself . To tell someone ERC20 Token contract , There may be target smart contract addresses in the future A Come to my wallet account to withdraw X Quantity of this Token assets ;
The first 2 Step : Transaction execution itself . When the target contract A This... Needs to be executed in the logic in Token Related transactions , contract A Will take the initiative to trigger ERC20 Token The contract is taken away X Quantity of this Token , Generate a transfer transaction ; conversely , If this is not involved Token Transactions , Even if authorized , There will be no real asset transactions .
because ETH As the native asset of Ethereum network , When transferring money to the target smart contract , At the bottom of Ethereum network, the target contract must have a definite receiving method , So the transaction itself can carry ETH Assets into the target contract ; and ERC20 Token When transferring money to the target contract , Just change ERC20 Token Account book information of the contract itself , The target contract will not receive any notice .
therefore ,ETH There is no need to interact with the value of smart contracts like ERC20 Token Do the authorization operation like that .
Now? , Come back to the problem to be explained in this article : Why? NFT Most secondary market transactions are ETH Standard , instead of USDT Standard . The direct reason is ,NFT Collection The project party is doing this NFT When the assets are sold at the first level , Adopted ETH Standard pricing offering .
The most essential reason behind this is : Because use ETH When the standard price is sold , User operation is simpler , There is no need for secondary authorization , Go straight ahead mint Just operate ; If you use USDT Priced offering , The user must first authorize and then go mint, More than a step .
Besides , Authorization operation itself has the problem of transitional authorization in the industry , therefore NFT The market is formed with ETH The situation of primary sale of the standard .
Since the primary market is in use ETH The standard is sold at a fixed price , Then the secondary market is also ETH Standard trading , This is more direct , Whether comparing prices or calculating earnings . If you return to use USDT valuation , Secondary conversion is required , It's too troublesome .
When most early projects and head projects adopt ETH Standard valuation , No matter what the quality and influence of the new projects are , Naturally, it will also be carried out according to the existing cognition and operating habits of the market , There is no need to do market education for users . therefore , Final NFT The trading market mainly uses ETH The situation of trading based on the standard has formed .
author :Shier, co-founder of NFTScan
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