pub struct BlockAnnounceValidator<Block, RCInterface> { /* private fields */ }Expand description
Parachain specific block announce validator.
This block announce validator is required if the parachain is running with the relay chain provided consensus to make sure each node only imports a reasonable number of blocks per round. The relay chain provided consensus doesn’t have any authorities and so it could happen that without this special block announce validator a node would need to import millions of blocks per round, which is clearly not doable.
To solve this problem, each block announcement is delayed until a collator
has received a Statement::Seconded for its PoV. This message tells the
collator that its PoV was validated successfully by a parachain validator and
that it is very likely that this PoV will be included in the relay chain. Every
collator that doesn’t receive the message for its PoV will not announce its block.
For more information on the block announcement, see WaitToAnnounce.
For each block announcement that is received, the generic block announcement validation
will call this validator and provides the extra data that was attached to the announcement.
We call this extra data justification.
It is expected that the attached data is a SCALE encoded BlockAnnounceData. The
statement is checked to be a CompactStatement::Seconded and that it is signed by an active
parachain validator.
If no justification was provided we check if the block announcement is at the tip of the known chain. If it is at the tip, it is required to provide a justification or otherwise we reject it. However, if the announcement is for a block below the tip the announcement is accepted as it probably comes from a node that is currently syncing the chain.
Implementations§
source§impl<Block, RCInterface> BlockAnnounceValidator<Block, RCInterface>where
RCInterface: Clone,
impl<Block, RCInterface> BlockAnnounceValidator<Block, RCInterface>where
RCInterface: Clone,
sourcepub fn new(relay_chain_interface: RCInterface, para_id: ParaId) -> Self
pub fn new(relay_chain_interface: RCInterface, para_id: ParaId) -> Self
Create a new BlockAnnounceValidator.
Trait Implementations§
source§impl<Block: BlockT, RCInterface> BlockAnnounceValidator<Block> for BlockAnnounceValidator<Block, RCInterface>where
RCInterface: RelayChainInterface + Clone + 'static,
impl<Block: BlockT, RCInterface> BlockAnnounceValidator<Block> for BlockAnnounceValidator<Block, RCInterface>where
RCInterface: RelayChainInterface + Clone + 'static,
source§impl<Block: Clone, RCInterface: Clone> Clone for BlockAnnounceValidator<Block, RCInterface>
impl<Block: Clone, RCInterface: Clone> Clone for BlockAnnounceValidator<Block, RCInterface>
source§fn clone(&self) -> BlockAnnounceValidator<Block, RCInterface>
fn clone(&self) -> BlockAnnounceValidator<Block, RCInterface>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
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source. Read moreAuto Trait Implementations§
impl<Block, RCInterface> RefUnwindSafe for BlockAnnounceValidator<Block, RCInterface>where
Block: RefUnwindSafe,
RCInterface: RefUnwindSafe,
impl<Block, RCInterface> Send for BlockAnnounceValidator<Block, RCInterface>where
Block: Send,
RCInterface: Send,
impl<Block, RCInterface> Sync for BlockAnnounceValidator<Block, RCInterface>where
Block: Sync,
RCInterface: Sync,
impl<Block, RCInterface> Unpin for BlockAnnounceValidator<Block, RCInterface>where
Block: Unpin,
RCInterface: Unpin,
impl<Block, RCInterface> UnwindSafe for BlockAnnounceValidator<Block, RCInterface>where
Block: UnwindSafe,
RCInterface: UnwindSafe,
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