📙NFT Metadata
What are Metadata 👨💻
On a blockchain where data are stored, and can be used to identify data stored. an NFT method of identity is the metadata which contain its information.
The metadata includes two main parts: data stored on-chain in the PDA (program Derived address) and data stored off-chain (usually in some permanent decentralized storage, e.g., Arweave, IPFS, or Shadow Drive).
PDA for better understanding, look at it as a storage room to keep all your stuff at 👍
On-Chain Metadata
The following fields are data stored within the on-chain metadata PDA for a given NFT:
Key - An account discriminator that identifies the type of metadata account
Update Authority - The public key that is allowed to update this account
Mint - The public key of the Mint Account it derives from
Name - The on-chain name of the token (e.g., "Quick Pixel #1")
Symbol - The on-chain symbol of the token (e.g., "FFF")
Uri - The URI to the external metadata. This URI points to an off-chain JSON file that contains additional data following a certain standard
Seller Fee Basis Points - This is the royalties the creators get for creating the NFTs when you buy them
Primary Sale Happened - A boolean indicating if the token has already been sold at least once. Once flipped to True, it cannot ever be False again. This field can affect the way royalties are distributed
Is Mutable - A boolean indicating if the metadata account can be updated. Once flipped to False, it cannot ever be True again
Creators - (optional) An array of creators and their share of the royalties. This array is limited to 5 creators. Each creator object contains the following fields: Address (string of creator's public key), Verified (boolean--true if the creator has signed the NFT), Share (a number [0-100] representing the proportional share of royalties in %. Sum of all creators' share should be 100)
Additional optional fields include: Creators, Edition Nonce, Token Standard, Collection, Uses, Collection Details
Source: Metaplex Token Metadata Accounts
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