Substrate pallet that enables parachains to issue non-transferable non-fungible tokens (nt-nfts).

The nt-nft module provides functionality for managing non-transferable non-fungible asset classes, including.

NFTs have generated significant value by creating a decentralized distributed digital representation of ownership. While this has found great success as a solution for assets with transferable ownership like art and even real estate, their transferable implementation is not suitable for non-transferable assets like credentials and memberships which need to be tied to a specific entity.

The need for NT-NFTs has been discussed in the crypto community, most notably, recently Vitalik Buterin wrote about the concept under the moniker of Soulbound Tokens.

Our solution is to implement Non-Transferable NFTs within a Substrate pallet.

At its core, our pallet is based off of Substrate's existing open source Uniques pallet. From Uniques' base NFT implementation, we stripped out transferability and have modeled functionality for proposing and accepting NT-NFT assignments. Proposals and acceptances are intended to prevent unwanted spam NT-NFTs from being assigned to individuals.
Additionally, we have added an optional expiration value which is aimed specifically at supporting impermanent credentials and memberships.

• create_collection
• destroy_collection
• freeze_collection
• thaw_collection
• mint_ntnft
• assign_ntnft
• discard_ntnft
• accept_assignment
• cancel_assignment
• force_create
• force_collection_status

• Refine NT-NFT Pallets Implementation
• Develop starter implementations for basic certification and membership use cases
• Integrate the NT-NFT pallet into Ventur, a business process focused parachain
• Create a testnet for Ventur and NT-NFT functionality

• System
• Support
• Assets
• Uniques

License: MIT