Enum BlockAnnounceOutcome 

pub enum BlockAnnounceOutcome<'a, TRq, TSrc, TBl> {
    TooOld {
        announce_block_height: u64,
        finalized_block_height: u64,
    },
    AlreadyVerified(AnnouncedBlockKnown<'a, TRq, TSrc, TBl>),
    AlreadyPending(AnnouncedBlockKnown<'a, TRq, TSrc, TBl>),
    Unknown(AnnouncedBlockUnknown<'a, TRq, TSrc, TBl>),
    InvalidHeader(Error),
}

Outcome of calling AllSync::block_announce.

Variants

TooOld

Announced block is too old to be part of the finalized chain.

It is assumed that all sources will eventually agree on the same finalized chain. Blocks whose height is inferior to the height of the latest known finalized block should simply be ignored. Whether or not this old block is indeed part of the finalized block isn’t verified, and it is assumed that the source is simply late.

If the announced block was the source’s best block, the state machine has been updated to take this information into account.

Fields

announce_block_height: u64

Height of the announced block.

finalized_block_height: u64

Height of the currently finalized block.

AlreadyVerified(AnnouncedBlockKnown<'a, TRq, TSrc, TBl>)

Announced block has already been successfully verified and is part of the non-finalized chain.

AlreadyPending(AnnouncedBlockKnown<'a, TRq, TSrc, TBl>)

Announced block is already known by the state machine but hasn’t been verified yet.

Unknown(AnnouncedBlockUnknown<'a, TRq, TSrc, TBl>)

Announced block isn’t in the state machine.

InvalidHeader(Error)

Failed to decode announce header.