Nft

This article summarizes the pitfalls and solutions when using the group feature with Pinata’s Files API v3. Background There are cases where you want to manage files uploaded to Pinata by groups and retrieve only files belonging to a specific group. For example, storing input images used in an NFT registration form in an “input” group and allowing image selection only from that group. Pitfalls 1. Legacy API and V3 API File Management Are Separate Problem: Files uploaded with the legacy API (pinFileToIPFS) cannot be retrieved with the V3 API (/v3/files). The reverse is also true. ...

Notice: 2025-06-14 Development progress is summarized here. https://zenn.dev/nakamura196/books/41693d2d017082 Overview Starting with the following article, I have been prototyping a digital cultural heritage management system using blockchain. This time, I modified the system so that uploaded data is recognized as NFTs. This is a learning process, so there may be incomplete aspects, but I hope it serves as a helpful reference. Usage Page The file upload method remains the same as before. A link to the detail page was added to the list page displayed after upload. ...

Overview I tried registering an image on OpenSea, so this is a memo of my experience. The page for the created item is below. https://opensea.io/assets/ethereum/0x495f947276749ce646f68ac8c248420045cb7b5e/10640296615676167047199551942164304992363478966543389627838835760480269631489 Uploading to OpenSea Uploading images to OpenSea was quite easy. On the other hand, the prior steps of creating MetaMask and OpenSea accounts took some time. There are many articles about these procedures, so please refer to those. Transferring from bitFlyer to MetaMask I sent 0.005 ETH held in bitFlyer to MetaMask. The transfer fee cost 0.005 ETH ($7.72, 990.48 yen). (Expensive… lol) ...