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Identifier

Off-chain assets need to be globally unique and identifiable just like on-chain assets. To achieve this for Futureverse assets, we have built an off-chain ownership repository to register any off-chain assets against the Asset Register.
PropertyDescriptionExample
Creator IDRandomly generated UUID for the creator. This will be provided to you and only you will be able access it.40877d72-9957-4de7-af77-1ee9f54a529e
Creator Collection IDA creator’s collection ID. This should be unique for each creator. It can be any string.12 | pb_1232124| bedde205-5af2-423b-9092-088c8951a2ea
Token ID (optional)The token ID is for uniquely identifying NFT assets in a collection. It will be empty if it is SFT (ERC1155 equivalent). This can be any string (like a UUID), however, it is best practice to stick to a number.4637 | 61d21cf3-6e0d-4b9d-a2c8-55583eb81a84
Asset IDThis is the combination of creatorAddress,creatorCollectionId & tokenId. SFT assets will not have a Token ID.40877d72-9957-4de7-af77-1ee9f54a529e:12:4637

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DID

Since ownership resolution needs to be globally unique we can use the did:fv-asset DID method directly with the already globally unique Asset ID.

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Example

did:fv-asset:off-chain:40877d72-9957-4de7-af77-1ee9f54a529e:12:4637

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Asset types

Just like on-chain assets which are classified as ERC721 (NFT) and ERC1155 (equivalent to an SFT), off-chain assets can be defined in the same way.

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NFT

A unique asset just like ERC721.

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Defined by

off-chain:{creatorId}:{creatorCollectionId}:{tokenId} For example: off-chain:40877d72-9957-4de7-af77-1ee9f54a529e:12:4637

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SFT

A collection that can store an infinite amount of assets defined by the same asset ID.

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Defined by

off-chain:{creatorId}:{creatorCollectionId} For example: off-chain:40877d72-9957-4de7-af77-1ee9f54a529e:12

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Register Off-Chain Asset 🔒

Unlike creating assets on the chain, off-chain assets must be registered with the Asset Register before they can then be registered with the schema. Assuming the schema for the off-chain asset is already created, the following illustrates the process of fully registering a new off-chain asset with the Asset Register to generate an asset tree.

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Register Asset - GraphQL Mutation

mutation RegisterOffChainAsset($input: RegisterOffChainAssetInput!) {
  registerOffChainAsset(input: $input) {
    ... on RegisterOffChainAssetSuccess {
      offChainAsset {
        assetId
        creator
        tokenId
        creatorCollectionId
        type
      }
    }
    ... on RegisterOffChainAssetFailure {
      errors {
        message
        extensions {
          code
        }
      }
    }
  }
}

{
  "input": {
    "creatorCollectionId": "20001",
    "creatorId": "eb117567-e455-4abd-b8e1-a7e451b96b23",
    "tokenId": "1"
  }
}