Struct polkadot_service::generic::Digest

pub struct Digest {
    pub logs: Vec<DigestItem, Global>,
}

Generic header digest.

Fields

logs: Vec<DigestItem, Global>

A list of logs in the digest.

Implementations

impl Digest

pub fn logs(&self) -> &[DigestItem]

Get reference to all digest items.

pub fn push(&mut self, item: DigestItem)

Push new digest item.

pub fn pop(&mut self) -> Option<DigestItem>

Pop a digest item.

pub fn log<T, F>(&self, predicate: F) -> Option<&T>where
    F: Fn(&DigestItem) -> Option<&T>,
    T: ?Sized,

Get reference to the first digest item that matches the passed predicate.

pub fn convert_first<T, F>(&self, predicate: F) -> Option<T>where
    F: Fn(&DigestItem) -> Option<T>,

Get a conversion of the first digest item that successfully converts using the function.

Trait Implementations

impl Clone for Digest

fn clone(&self) -> Digest

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Digest

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

Formats the value using the given formatter.

impl Decode for Digest

fn decode<__CodecInputEdqy>(
    __codec_input_edqy: &mut __CodecInputEdqy
) -> Result<Digest, Error>where
    __CodecInputEdqy: Input,

Attempt to deserialise the value from input.

fn skip<I>(input: &mut I) -> Result<(), Error>where
    I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Default for Digest

fn default() -> Digest

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Digest

fn deserialize<__D>(
    __deserializer: __D
) -> Result<Digest, <__D as Deserializer<'de>>::Error>where
    __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for Digest

fn encode_to<__CodecOutputEdqy>(&self, __codec_dest_edqy: &mut __CodecOutputEdqy)where
    __CodecOutputEdqy: Output + ?Sized,

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8, Global>

Convert self to an owned vector.

fn using_encoded<R, F>(&self, f: F) -> Rwhere
    F: FnOnce(&[u8]) -> R,

Convert self to a slice and then invoke the given closure with it.

fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

fn encoded_size(&self) -> usize

Calculates the encoded size.

impl MallocSizeOf for Digest

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself. If T::size_of is a constant, consider implementing constant_size as well.

fn constant_size() -> Option<usize>where
    Self: Sized,

Used to optimize MallocSizeOf implementation for collections like Vec and HashMap to avoid iterating over them unnecessarily. The Self: Sized bound is for object safety.

impl PartialEq<Digest> for Digest

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for Digest

fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
    __S: Serializer,

Serialize this value into the given Serde serializer.

impl TypeInfo for Digest

type Identity = Digest

The type identifying for which type info is provided.

fn type_info() -> Type<MetaForm>

Returns the static type identifier for Self.

impl EncodeLike<Digest> for Digest

impl Eq for Digest

impl StorageAppend<DigestItem> for Digest

We abuse the fact that SCALE does not put any marker into the encoding, i.e. we only encode the internal vec and we can append to this vec. We have a test that ensures that if the Digest format ever changes, we need to remove this here.

impl StructuralEq for Digest

impl StructuralPartialEq for Digest