Trait CompareStrategy

pub trait CompareStrategy<Block: BlockT, BlockInfo: Client<Block>> {
    type Error: Error;

    // Required method
    fn compare_block(
        &self,
        block: NumberFor<Block>,
        block_info: &BlockInfo,
    ) -> Result<Ordering, Self::Error>;
}

Comparator used for binary searching the block history

Types implementing this trait represent some search target, which is to be found through binary search over block history. Note that this search target can be a single block defined by its slot or some other monotonically increasing block property, or a range of blocks defined by a range of slots or other property.

Required Associated Types

type Error: Error

Error type

Required Methods

fn compare_block( &self, block: NumberFor<Block>, block_info: &BlockInfo, ) -> Result<Ordering, Self::Error>

Compares a block against a search target.

Returns

• Ok(Ordering::Less) if the block is below the target
• Ok(Ordering::Equal) if the block is at target
• Ok(Ordering::Greater) if the block is above the target
• Err if an error occured

Implementors

impl<Block, BlockInfo> CompareStrategy<Block, BlockInfo> for AnyBlockInEpoch

where Block: BlockT, BlockInfo: SidechainInfo<Block>,

type Error = <BlockInfo as SidechainInfo<Block>>::Error

impl<Block, BlockInfo> CompareStrategy<Block, BlockInfo> for AnyBlockInSlotRange

where Block: BlockT, BlockInfo: SidechainInfo<Block>,

type Error = <BlockInfo as SidechainInfo<Block>>::Error

impl<Block, BlockInfo> CompareStrategy<Block, BlockInfo> for LastBlockInEpoch

where Block: BlockT, BlockInfo: SidechainInfo<Block>,

type Error = <BlockInfo as SidechainInfo<Block>>::Error

impl<Block, BlockInfo> CompareStrategy<Block, BlockInfo> for LatestBlockInSlotRange<Block>

where Block: BlockT, BlockInfo: SidechainInfo<Block>,

type Error = <BlockInfo as SidechainInfo<Block>>::Error