Dependencies: Node.js, Docker.

This squid indexes the events of VRF from decentralized oracle

this squid is deployed on aquarium: https://squid.subsquid.io/vrf-squid/v/v1/graphql

indexed events

• RandomValueRequested
• RandomValueReceived

Entities

the only entity is "randomValues"

a new entity is created by a RandomValueRequested event and is updated by RandomValueReceived event

when the random value has not been processed yet, the randomValue and receivedTimestamp fields are null

Queries

last 10 randomValues requested

query MyQuery {
  randomValues(orderBy: requestorTimestamp_DESC, limit: 10) {
    id
    max
    min
    nonce
    randomValue
    receivedTimestamp
    requestorId
    requestorTimestamp
  }
}

randomValue requested from account "XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXxX" and with nonce "99"

query MyQuery {
  randomValues(orderBy: requestorTimestamp_DESC, limit: 10, where: {requestorId_eq: "XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXxX", nonce_eq: "99"}) {
    id
    max
    min
    nonce
    randomValue
    receivedTimestamp
    requestorId
    requestorTimestamp
  }
}

local install

# 1. Install dependencies
npm ci

# 2. Start a Postgres database container and detach
sqd up

# 3. Start the processor
sqd process

# 4. The command above will block the terminal
#    being busy with fetching the chain data, 
#    transforming and storing it in the target database.
#
#    To start the graphql server open the separate terminal
#    and run
sqd serve