Enum BlockIdentifier 

pub enum BlockIdentifier {
    Number((Chain, i64)),
    Hash(BlockHash),
    Latest(Chain),
}

Identifies a block in storage.

Variants

Number((Chain, i64))

Identifies the block by its position on a specified chain.

This form of identification has potential risks as it may become ambiguous in certain situations. For example, if the block has not been finalised, there exists a possibility of forks occurring. As a result, the same number could refer to different blocks on different forks.

Hash(BlockHash)

Identifies a block by its hash.

The hash should be unique across multiple chains. Preferred method if the block is very recent.

Latest(Chain)

Latest stored block for the target chain

Returns the block with the highest block number on the target chain.

Trait Implementations

impl Clone for BlockIdentifier

fn clone(&self) -> BlockIdentifier

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BlockIdentifier

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

Formats the value using the given formatter.

impl Display for BlockIdentifier

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

Formats the value using the given formatter.

impl Hash for BlockIdentifier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BlockIdentifier

fn eq(&self, other: &BlockIdentifier) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for BlockIdentifier

impl StructuralPartialEq for BlockIdentifier