From February 2021, NFTs have continued to heat up. Traditional giants including Christie’s auction house, NBA, and LEGO have deployed NFT scenarios, which can be seen as the best combination of traditional industries and blockchain technology. Then technical flaws are emerging with NFT popularity. In addition to liquidity of NFT, the storage of metadata is one of the biggest pain points. At present, the metadata of a large number of NFT works are stored in centralized off-chain servers that a server failure or data loss may cause instant disappearance ofRead More