Everything a provider declares about its streaming behaviour.
This is the only thing an implementation states. Whether a particular subscription is supported, and whether it is cheap, is derived from this descriptor by SubscriptionSupport.of — so a provider cannot refuse something it advertised, or accept something it did not, and callers can decide what to ask for before asking.
Value parameters
- idleSignals
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whether the provider can emit progress signals for non-matching blocks
- kinds
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which subscription kinds are served at all
- maxConfirmations
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the largest confirmation depth the provider can gate on, if bounded
- pushdown
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query sources that can be served from an index rather than a scan
- replay
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how far back a subscription can start
- rollbackHorizon
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how deep a reorg the provider can report.
Nonemeans it never signals rollbacks — which is not the same as "no rollbacks happen", and is exactly why it is declared rather than assumed - scanning
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what a query outside pushdown costs —
Freefor a provider that already holds every block,Meteredfor one that would have to go and fetch it
Attributes
- Companion
- object
- Graph
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- Supertypes
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trait Serializabletrait Producttrait Equalsclass Objecttrait Matchableclass Any