upstreams:
  - id: infura
    chain: ethereum
    role: fallback
    priority: 20
    options:
      disable-validation: false
      validate-peers: false
      validate-syncing: true
    connection:
      ethereum:
        rpc:
          url: "https://mainnet.infura.io/v3/${INFURA_KEY}"
        ws:
          url: "wss://mainnet.infura.io/ws/v3/${INFURA_KEY}"