Expand description
Utility module for subsystems
Many subsystems have common interests such as canceling a bunch of spawned jobs, or determining what their validator ID is. These common interests are factored into this module.
This crate also reexports Prometheus metric types which are expected to be implemented by subsystems.
Re-exports§
pub use rand;
pub use metered;
Modules§
- Helpers for the validator->chunk index mapping.
- A utility for managing the implicit view of the relay-chain derived from active leaves and the minimum allowed relay-parents that parachain candidates can have and be backed in those leaves’ children.
- Database trait for subsystem. Database trait for polkadot db.
- An emulator for node-side code to predict the results of on-chain parachain inclusion and predict future constraints.
- This module reexports Prometheus types and defines the
Metrics
trait. - Nested message sending
- These reexports are required so that external crates can use the
delegated_subsystem
macro properly. - A utility abstraction to collect and send reputation changes.
- Convenient and efficient runtime info access. Convenient interface to runtime information.
- Helpers for working with unreleased runtime calls Contains helpers for staging runtime calls.
Structs§
- Create a stream of ticks with a defined cycle duration.
- A future that wraps another future with a
Delay
allowing for time-limited futures. - Local validator information
Enums§
- Utility errors
- An error type that describes faults that may happen
Constants§
- Capacity of channels to and from individual jobs
- Duration a job will wait after sending a stop signal before hard-aborting.
- The minimum amount of peers to send gossip messages to.
Traits§
- Extends
Future
to allow time-limited futures.
Functions§
- Choose a random subset of
min
elements. But always includeis_priority
elements. - Choose a random subset of
min
elements using a specific Random GeneratorRng
But always includeis_priority
elements. - Given a new chain-head hash, this determines the hashes of all new blocks we should track metadata for, given this head.
- Requests executor parameters from the runtime effective at given relay-parent. First obtains session index at the relay-parent, relying on the fact that it should be cached by the runtime API caching layer even if the block itself has already been pruned. Then requests executor parameters by session index. Returns an error if failed to communicate to the runtime, or the parameters are not in the storage, which should never happen. Returns default execution parameters if the runtime doesn’t yet support
SessionExecutorParams
API call. Otherwise, returns execution parameters returned by the runtime. - Find the validator group the given validator index belongs to.
- Returns a
bool
with a probability ofa / b
of being true. - Returns a
bool
with a probability ofa / b
of being true. - Verifies if
ParachainHost
runtime api is at least at versionrequired_runtime_version
. This method is used to determine if a given runtime call is supported by the runtime. - Request
AssumedValidationData
from the runtime - Request
AsyncBackingParams
from the runtime - Request
Authorities
from the runtime - Request
AvailabilityCores
from the runtime - Request
CandidateEvents
from the runtime - Request
CandidatePendingAvailability
from the runtime - Request
CandidatesPendingAvailability
from the runtime - Request
ClaimQueue
from the runtime - Request
DisabledValidators
from the runtime - Request some data from the
RuntimeApi
. - Request
KeyOwnershipProof
from the runtime - Request
FetchOnChainVotes
from the runtime - Request
ParaBackingState
from the runtime - Request
PersistedValidationData
from the runtime - Request
Version
from the runtime - Request
SessionExecutorParams
from the runtime - Request
SessionIndexForChild
from the runtime - Request
SessionInfo
from the runtime - Request
SubmitReportDisputeLost
from the runtime - Request
UnappliedSlashes
from the runtime - Request
ValidationCode
from the runtime - Request
ValidationCodeByHash
from the runtime - Request
ValidationCodeHash
from the runtime - Request
ValidatorGroups
from the runtime - Request
Validators
from the runtime - Sign the given data with the given validator ID.
- From the given set of validators, find the first key we can sign with, if any.
- From the given set of validators, find the first key we can sign with, if any, and return it along with the validator index.
Type Aliases§
- A type alias for Runtime API receivers.