Provide an async function to wait for the next message on a filter subscription

[fryorcraken]

This is a feature request

Problem

As a dev, I may prefer to do a await subscription.next() on a filter subscription rather than passing a callback function.

Proposed Solutions

We did implement some IReceiver with toSubscriptionIterator, I wonder if this can help? If so, it may just be a question of documenting its usage.

[weboko]

Here is an example of how toSubscriptionIterator can be used to achieve await subscription.next() API

The next step would be to document it in a way that developers are aware of such an opportunity.

@LordGhostX let's discuss how we can achieve it.

[danisharora099]

I propose to (also) expose an event-based API for Filter

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I'll open an issue to track this separately: #1682

[chair28980]

@LordGhostX are you able to pick this issue up?