Streaming

Horizon provides a streaming mechanism for receiving events in near real time. Instead of repeatedly sending requests to Horizon for batch updates, a connection is established between a client and Horizon with updates to an endpoint response streaming as new ledgers close and updates occur.

This reduces requests that return no data and allows near instantaneous updates client-side.

All attributes for the endpoints that allow streaming are the same as regular responses. A caller can initiate streaming by setting ‘Accept: text/event-stream’ in the HTTP header when making the request. Study an example of using streaming in the Follow Received Payments tutorial.

Endpoints with Streaming

Ledgers
Transactions
Operations
Payments
Effects
Accounts
Trades
Order Books