Step 1. Get Supported Protocols and Networks

First, we need to get a list of supported protocols and networks that we'll be using to send and receive events. This can be done by using the Overview endpoint as shown below.

Request Payload

curl -X GET \
  "https://svc.blockdaemon.com/streaming/v2/" \
  -H "Accept: application/json" \

Response Payload

The response is a JSON array containing objects that display a protocol overview.

[
  {
    "match_variable_supported": true,
    "match_variable_types": [
      {
        "source": "confirmed_balance,confirmed_tx",
        "variable_type": "address"
      },
      {
        "source": "block",
        "variable_type": "event_type"
      }
    ],
    "network": "mainnet",
    "protocol": "polkadot"
  }
]

Each object represents a protocol overview with the following fields:

Fields	Details
`match_variable_types`	An array of supported match variable types for the protocol.
`source`	The data that will be received for each `variable_type`. For example: - `event_type` will produce `block` event. - `address` will produce `confirmed_tx` and `confirmed_balance` events.
`variable_type`	The supported variable types. In this case, we have options such as `address` and `event_type`. This implies that we can create variables later on and use them to match against `address` or `event_type`.
`network`	Associated network (e.g., mainnet).
`protocol`	Protocol name (e.g., polkadot, dogecoin, ethereum).

Request Payload

Response Payload

👋 Need Help?