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Runtime API

roadmap/implementers-guide/src/node/utility/runtime-api.md

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Runtime API

The Runtime API subsystem is responsible for providing a single point of access to runtime state data via a set of pre-determined queries. This prevents shared ownership of a blockchain client resource by providing

Protocol

Input: RuntimeApiMessage

Output: None

Functionality

On receipt of RuntimeApiMessage::Request(relay_parent, request), answer the request using the post-state of the relay_parent provided and provide the response to the side-channel embedded within the request.

Jobs

TODO Don't limit requests based on parent hash, but limit caching. No caching should be done for any requests on relay_parents that are not active based on ActiveLeavesUpdate messages. Maybe with some leeway for things that have just been stopped.