schema.graphql

type OwnerToken @entity {
    id: ID!                                                             # Token ID (odd number)
    isGame: Boolean!                                                    # Whether the token is for a game or an asset
    licenseToken: LicenseToken! @derivedFrom(field: "ownerToken")       # Associated license token
    ipfsHash: String!                                                   # IPFS hash for token data
    holder: Holder!                                                     # ETH address holding the token
}

type LicenseToken @entity {
    id: ID!                                                             # Token ID (even number)
    ownerToken: OwnerToken!                                             # Associated owner token
    price: BigDecimal!                                                  # Price in ETH of license
    remainingLicenses: BigInt!                                          # Number of licenses remaining for purchase
    holders: [HolderLicenseToken!]! @derivedFrom(field: "licenseToken") # ETH addresses that hold the token
}

type Holder @entity {
    id: ID!                                                             # ETH address of token holder
    ownerTokens: [OwnerToken!]! @derivedFrom(field: "holder")           # Owner tokens held by the address
    licenseTokens: [HolderLicenseToken!]! @derivedFrom(field: "holder") # License tokens held by the address
}

# Join table for Holder-LicenseToken many-to-many relationship
type HolderLicenseToken @entity {
    id: ID!                                                             # Set to `${holder.id}-${licenseToken.id}`
    holder: Holder!
    licenseToken: LicenseToken!
}