Module polkadot_node_subsystem_util::rolling_session_window

A rolling session window cache. A rolling window of sessions and cached session info, updated by the state of newly imported blocks.

This is useful for consensus components which need to stay up-to-date about recent sessions but don’t care about the state of particular blocks.

Macros

• new_session_window_size
  Create a new checked SessionWindowSize which cannot be 0.

Structs

• DatabaseParams
  A structure to store rolling session database parameters.
• RollingSessionWindow
  A rolling window of sessions and cached session info.
• SessionWindowSize
  Type of a session window size.
• SessionsUnavailable
  Sessions were unavailable to fetch from the state for some reason.
• SessionsUnavailableInfo
  Information about the sessions being fetched.

Enums

• SessionWindowUpdate
  An indicated update of the rolling session window.
• SessionsUnavailableReason
  Sessions unavailable in state to cache.