Add doc reference for HIP-657

[SimiHunjan]

Problem

HIP-657 introduces new HAPI APis. The new APIs need to be supported in the SDKs.

HIP:https://hips.hedera.com/hip/hip-657

Protobufs

New Transaction:

message NftMetadataUpdateTransactionBody {
    /**
     * The Token to be updated
     */
    TokenID token = 1;

    /**
     * The metadata key of the Token. If Token is immutable, transaction will resolve to
     * TOKEN_IS_IMMUTABlE.
     */
     
     Key metadataKey = 2;

    /**
     * Represents the unique metadata of the NFT
     */
    bytes metadata = 3;
}

Update Existing Transaction:

message TokenCreateTransactionBody {
...
    /**
     * The key which can change the supply of a token. The key is used to sign Token NFT Metadata Update
     * operations
     */
    Key metadataKey = 11;
}

message TokenUpdateTransactionBody {
...
    /**
     * The key which can change the metadata of an NFT. The key is used to sign Token NFT Metadata Update
     * operations
     */
    Key metadataKey = 11;
}

Solution

Document the API design for each SDK to add this feature.

Java + JavaScript

new NftMetadataUpdateTransaction()
      .setTokenId(tokenId)
      .setMetadataKey(key)
      .setMetadata(bytes) 

new TokenCreateTransaction()
     .setMetadataKey(key)

new TokenUpdateTransaction()
     .setMetadataKey(key)

Go

hedera.NewNftMetadataUpdateTransaction()
      .SetTokenId(tokenId)
      .SetMetadataKey(key)
      .SetMetadata(bytes) 

hedera.NewTokenCreateTransaction()
     .SetMetadataKey(key)

hedera.NewTokenUpdateTransaction()
     .SetMetadataKey(key)

C++

Rust

Swift

Alternatives

No response

SDKs

Beta Give feedback

1. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-java#1496
   Epic enhancement good first issue protobuf services +5
   
2. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-js#1733
   dependencies enhancement good first issue p1 protobuf services +6
   
3. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-go#774
   enhancement p1 +2
   
4. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-rust#612
   P1 enhancement +2
5. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-swift#166
   P1 enhancement +2
6. Add HIP-657 Mutable metadata fields for dynamic NFTs hedera-sdk-cpp#443
   Feature Enhancement +1