schema

UniRep needs to persist data in order to construct state and make proofs. To do this we use a generic database wrapper called anondb. This wrapper has support for desktop environment databases like SQLite, as well as the IndexedDB browser database.

@unirep/core ships a schema that should be used with the database. This schema can be extended by adding additional collections for application specific data storage.

import { schema } from '@unirep/core'
import { SQLiteConnector } from 'anondb/node'
import { IndexedDBConnector } from 'anondb/web'

{
  // in nodejs
  const db = new SQLiteConnector(schema, ':memory:')
}
{
  // in browser
  const db = new IndexedDBConnector(schema, 1)
}

SynchronizerState

Used to store information about what blocks/transactions/events have been processed.

{
  attesterId: string,
  latestProcessedBlock: number,
  latestProcessedTransactionIndex: number,
  latestCompleteBlock: number
}

Attestation

An attestation given to an epoch key.

{
  epoch: number,
  epochKey: string, // base 10
  index: string,
  attesterId: string,
  fieldIndex: number,
  change: number,
  timestamp: number,
  blockNumber: number
}

StateTreeLeaf

A leaf from a state tree.

{
  epoch: number,
  hash: string,
  index: number,
  attesterId: string
  blockNumber: number
}

EpochTreeLeaf

A leaf from an epoch tree.

{
  id: string,
  epoch: number,
  hash: string,
  index: string,
  attesterId: string
  blockNumber: number
}

Epoch

An epoch entry.

{
  number: number,
  attesterId: string,
  sealed: boolean
}

Nullifier

{
  epoch: number,
  attesterId: string,
  nullifier: string,
  transactionHash: string,
  blockNumber: number
}

UserSignUp

An object created when a user joins an attester.

{
  commitment: string,
  epoch: number,
  attesterId: string
  blockNumber: number
}

Attester

An object created when an attester registers with the Unirep instance.

{
  _id: string // the contract address
  startTimestamp: number
  epochLength: number
}