EventSubscription

class EventSubscription

A live subscription.

Call next in a loop to receive updates; it only returns None once cancel has been called, since the subscription itself never ends.

`cancel()`

func cancel()

Cancel the subscription, dropping the connection and unblocking a pending next.

Idempotent, and safe to call while next is pending — the pending call drops the connection on its way out.

Named cancel rather than close because a close method collides with the disposal method uniffi generates for objects in some languages.

`isCanceled()`

func isCanceled() -> Bool

Whether the subscription has been canceled.

`next()`

func next() async throws -> EventUpdate?

Wait for the next update.

Returns None once the subscription has been canceled. Concurrent calls are serialized; there is no ordering guarantee between them.

Raises for errors the subscription cannot recover from by itself, such as a rejected filter. The subscription stays usable afterwards, so a caller that considers the error transient can keep calling next.