Enum polkadot_node_subsystem_types::messages::ChainApiMessage[−][src]

pub enum ChainApiMessage {
    BlockNumber(Hash, ChainApiResponseChannel<Option<BlockNumber>>),
    BlockHeader(Hash, ChainApiResponseChannel<Option<BlockHeader>>),
    BlockWeight(Hash, ChainApiResponseChannel<Option<BlockWeight>>),
    FinalizedBlockHash(BlockNumber, ChainApiResponseChannel<Option<Hash>>),
    FinalizedBlockNumber(ChainApiResponseChannel<BlockNumber>),
    Ancestors {
        hash: Hash,
        k: usize,
        response_channel: ChainApiResponseChannel<Vec<Hash>>,
    },
}

Expand description

Chain API request subsystem message.

Variants

BlockNumber(Hash, ChainApiResponseChannel<Option<BlockNumber>>)

Request the block number by hash. Returns None if a block with the given hash is not present in the db.

Tuple Fields of BlockNumber

0: Hash1: ChainApiResponseChannel<Option<BlockNumber>>

BlockHeader(Hash, ChainApiResponseChannel<Option<BlockHeader>>)

Request the block header by hash. Returns None if a block with the given hash is not present in the db.

Tuple Fields of BlockHeader

0: Hash1: ChainApiResponseChannel<Option<BlockHeader>>

BlockWeight(Hash, ChainApiResponseChannel<Option<BlockWeight>>)

Get the cumulative weight of the given block, by hash. If the block or weight is unknown, this returns None.

Note: this is the weight within the low-level fork-choice rule, not the high-level one implemented in the chain-selection subsystem.

Weight is used for comparing blocks in a fork-choice rule.

Tuple Fields of BlockWeight

0: Hash1: ChainApiResponseChannel<Option<BlockWeight>>

FinalizedBlockHash(BlockNumber, ChainApiResponseChannel<Option<Hash>>)

Request the finalized block hash by number. Returns None if a block with the given number is not present in the db. Note: the caller must ensure the block is finalized.

Tuple Fields of FinalizedBlockHash

0: BlockNumber1: ChainApiResponseChannel<Option<Hash>>

FinalizedBlockNumber(ChainApiResponseChannel<BlockNumber>)

Request the last finalized block number. This request always succeeds.

Tuple Fields of FinalizedBlockNumber

0: ChainApiResponseChannel<BlockNumber>

Ancestors

Request the k ancestors block hashes of a block with the given hash. The response channel may return a Vec of size up to k filled with ancestors hashes with the following order: parent, grandparent, …

Fields of Ancestors

hash: Hash

The hash of the block in question.

k: usize

The number of ancestors to request.

response_channel: ChainApiResponseChannel<Vec<Hash>>

The response channel.

Enum polkadot_node_subsystem_types::messages::ChainApiMessage[−][src]

Variants

Tuple Fields of BlockNumber

Tuple Fields of BlockHeader

Tuple Fields of BlockWeight

Tuple Fields of FinalizedBlockHash

Tuple Fields of FinalizedBlockNumber

Fields of Ancestors

Implementations

impl ChainApiMessage

pub fn relay_parent(&self) -> Option<Hash>

Trait Implementations

impl Debug for ChainApiMessage

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

Auto Trait Implementations

impl !RefUnwindSafe for ChainApiMessage

impl Send for ChainApiMessage

impl Sync for ChainApiMessage

impl Unpin for ChainApiMessage

impl !UnwindSafe for ChainApiMessage

Blanket Implementations

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