semaphore-protocol / subgraph Goto Github PK

Tasks:

• Update dependencies
• Update scripts
• Add tests
• Test local subgraph

Resources:

• https://thegraph.com/docs/en/cookbook/migrating-a-subgraph/
• https://dune.com

Is your feature request related to a problem? Please describe.

It is currently not possible to retrieve the on chain verified proofs using the subgraph

Describe the solution you'd like

We could add the VerifiedProof entity to the schema as

type VerifiedProof @entity {
    id: ID!
    signal: Bytes!
    group: Group!
}

Additionally, the Group entity could be updated as follows

type Group @entity {
    id: ID!
    depth: Int!
    zeroValue: BigInt!
    root: BigInt!
    size: Int!
    numberOfLeaves: Int!
    admin: Bytes!
    members: [Member!]! @derivedFrom(field: "group")
    verifiedProofsCount: Int!
    verifiedProofs: [VerifiedProof!]! @derivedFrom(field: "group")
}

I added the verifiedProofsCount as a way to keep track of the number of published verified proofs and use it in order to generate the ID of new proof as ID = hash(verifiedProofsCount, group ID)

Happy to hear opinions on this :)

Describe alternatives you've considered

For now, I retrieve the past events for ProofVerified using usual Ethereum provider

Additional context

I did a version of this on a branch of a fork here. Happy to convert it to a PR if the feature ended being interesting :)

The deployed version can be found on my hosted service