Enum polkadot_node_subsystem_types::messages::ProspectiveParachainsMessage

pub enum ProspectiveParachainsMessage {
    IntroduceCandidate(IntroduceCandidateRequest, Sender<FragmentTreeMembership>),
    CandidateSeconded(ParaId, CandidateHash),
    CandidateBacked(ParaId, CandidateHash),
    GetBackableCandidate(Hash, ParaId, Vec<CandidateHash>, Sender<Option<(CandidateHash, Hash)>>),
    GetHypotheticalFrontier(HypotheticalFrontierRequest, Sender<Vec<(HypotheticalCandidate, FragmentTreeMembership)>>),
    GetTreeMembership(ParaId, CandidateHash, Sender<FragmentTreeMembership>),
    GetMinimumRelayParents(Hash, Sender<Vec<(ParaId, BlockNumber)>>),
    GetProspectiveValidationData(ProspectiveValidationDataRequest, Sender<Option<PersistedValidationData>>),
}

Messages sent to the Prospective Parachains subsystem.

Variants

IntroduceCandidate(IntroduceCandidateRequest, Sender<FragmentTreeMembership>)

Inform the Prospective Parachains Subsystem of a new candidate.

The response sender accepts the candidate membership, which is the existing membership of the candidate if it was already known.

CandidateSeconded(ParaId, CandidateHash)

Inform the Prospective Parachains Subsystem that a previously introduced candidate has been seconded. This requires that the candidate was successfully introduced in the past.

CandidateBacked(ParaId, CandidateHash)

Inform the Prospective Parachains Subsystem that a previously introduced candidate has been backed. This requires that the candidate was successfully introduced in the past.

GetBackableCandidate(Hash, ParaId, Vec<CandidateHash>, Sender<Option<(CandidateHash, Hash)>>)

Get a backable candidate hash along with its relay parent for the given parachain, under the given relay-parent hash, which is a descendant of the given candidate hashes. Returns None on the channel if no such candidate exists.

GetHypotheticalFrontier(HypotheticalFrontierRequest, Sender<Vec<(HypotheticalCandidate, FragmentTreeMembership)>>)

Get the hypothetical frontier membership of candidates with the given properties under the specified active leaves’ fragment trees.

For any candidate which is already known, this returns the depths the candidate occupies.

GetTreeMembership(ParaId, CandidateHash, Sender<FragmentTreeMembership>)

Get the membership of the candidate in all fragment trees.

GetMinimumRelayParents(Hash, Sender<Vec<(ParaId, BlockNumber)>>)

Get the minimum accepted relay-parent number for each para in the fragment tree for the given relay-chain block hash.

That is, if the block hash is known and is an active leaf, this returns the minimum relay-parent block number in the same branch of the relay chain which is accepted in the fragment tree for each para-id.

If the block hash is not an active leaf, this will return an empty vector.

Para-IDs which are omitted from this list can be assumed to have no valid candidate relay-parents under the given relay-chain block hash.

Para-IDs are returned in no particular order.

GetProspectiveValidationData(ProspectiveValidationDataRequest, Sender<Option<PersistedValidationData>>)

Get the validation data of some prospective candidate. The candidate doesn’t need to be part of any fragment tree, but this only succeeds if the parent head-data and relay-parent are part of some fragment tree.

Trait Implementations

impl Debug for ProspectiveParachainsMessage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.