Crate polkadot_node_subsystem_types

Subsystem trait definitions and message types.

Node-side logic for Polkadot is mostly comprised of Subsystems, which are discrete components that communicate via message-passing. They are coordinated by an overseer, provided by a separate crate.

Modules

• errors
  Error types for the subsystem requests.
• messages
  Message types for the overseer and subsystems.

Structs

• ActivatedLeaf
  Activated leaf.
• ActiveLeavesUpdate
  Changes in the set of active leaves: the parachain heads which we care to work on.
• DefaultSubsystemClient
  Default implementation of RuntimeApiSubsystemClient using the client.

Enums

• OverseerSignal
  Signals sent by an overseer to a subsystem.

Traits

• ChainApiBackend
  Offers header utilities.
• RuntimeApiSubsystemClient
  Exposes all runtime calls that are used by the runtime API subsystem.

Type Aliases

• Block
  Block type.
• BlockNumber
  The block number type used by Polkadot. 32-bits will allow for 136 years of blocks assuming 1 block per second.
• Hash
  A hash of some data used by the relay chain.
• UnpinHandle
  Keeps the state of a specific block pinned in memory while the handle is alive.