Struct sp_runtime::generic::Header[−][src]

pub struct Header<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> {
    pub parent_hash: Hash::Output,
    pub number: Number,
    pub state_root: Hash::Output,
    pub extrinsics_root: Hash::Output,
    pub digest: Digest<Hash::Output>,
}

Expand description

Abstraction over a block header for a substrate chain.

Fields

parent_hash: Hash::Output

The parent hash.

number: Number

The block number.

state_root: Hash::Output

The state trie merkle root

extrinsics_root: Hash::Output

The merkle root of the extrinsics.

digest: Digest<Hash::Output>

A chain-specific digest of data useful for light clients or referencing auxiliary data.

Implementations

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impl<Number, Hash> Header<Number, Hash> where
    Number: Member + Hash + Copy + MaybeDisplay + AtLeast32BitUnsigned + Codec + Into<U256> + TryFrom<U256>,
    Hash: HashT,
    Hash::Output: Default + Hash + Copy + Member + MaybeDisplay + SimpleBitOps + Codec,

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pub fn hash(&self) -> Hash::Output

Convenience helper for computing the hash of the header without having to import the trait.

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impl Header<u64, BlakeTwo256>

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pub fn new_from_number(number: <Self as Header>::Number) -> Self

A new header with the given number and default hash for all other fields.

Trait Implementations

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impl<Number: Clone + Copy + Into<U256> + TryFrom<U256>, Hash: Clone + HashT> Clone for Header<Number, Hash> where
    Hash::Output: Clone,
    Hash::Output: Clone,
    Hash::Output: Clone,
    Hash::Output: Clone,

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fn clone(&self) -> Header<Number, Hash>

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> Debug for Header<Number, Hash> where
    Number: Debug,
    Hash: Debug,

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

Formats the value using the given formatter. Read more

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> Decode for Header<Number, Hash> where
    Hash::Output: Decode,
    Hash::Output: Decode,
    Hash::Output: Decode,
    Hash::Output: Decode,
    Hash::Output: Decode,
    Hash::Output: Decode,
    Digest<Hash::Output>: Decode,
    Digest<Hash::Output>: Decode,
    Number: HasCompact,

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

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. Read more

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more

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impl<'de, Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> Deserialize<'de> for Header<Number, Hash> where
    Hash::Output: Deserialize<'de>,
    Hash::Output: Deserialize<'de>,
    Hash::Output: Deserialize<'de>,

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

Deserialize this value from the given Serde deserializer. Read more

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> Encode for Header<Number, Hash> where
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Digest<Hash::Output>: Encode,
    Digest<Hash::Output>: Encode,
    Number: HasCompact,

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

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

fn size_hint(&self) -> usize

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

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

Convert self to an owned vector.

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

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

fn encoded_size(&self) -> usize

Calculates the encoded size. Read more

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impl<Number, Hash> Header for Header<Number, Hash> where
    Number: Member + MaybeSerializeDeserialize + Debug + Hash + MaybeDisplay + AtLeast32BitUnsigned + Codec + Copy + Into<U256> + TryFrom<U256> + FromStr + MaybeMallocSizeOf,
    Hash: HashT,
    Hash::Output: Default + Hash + Copy + Member + Ord + MaybeSerialize + Debug + MaybeDisplay + SimpleBitOps + Codec + MaybeMallocSizeOf,

type Number = Number

Header number.

type Hash = <Hash as HashT>::Output

Header hash type

type Hashing = Hash

Hashing algorithm

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fn number(&self) -> &Self::Number

Returns a reference to the header number.

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fn set_number(&mut self, num: Self::Number)

Sets the header number.

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fn extrinsics_root(&self) -> &Self::Hash

Returns a reference to the extrinsics root.

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fn set_extrinsics_root(&mut self, root: Self::Hash)

Sets the extrinsic root.

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fn state_root(&self) -> &Self::Hash

Returns a reference to the state root.

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fn set_state_root(&mut self, root: Self::Hash)

Sets the state root.

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fn parent_hash(&self) -> &Self::Hash

Returns a reference to the parent hash.

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fn set_parent_hash(&mut self, hash: Self::Hash)

Sets the parent hash.

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fn digest(&self) -> &Digest<Self::Hash>

Returns a reference to the digest.

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fn digest_mut(&mut self) -> &mut Digest<Self::Hash>

Get a mutable reference to the digest.

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fn new(
    number: Self::Number, 
    extrinsics_root: Self::Hash, 
    state_root: Self::Hash, 
    parent_hash: Self::Hash, 
    digest: Digest<Self::Hash>
) -> Self

Creates new header.

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fn hash(&self) -> Self::Hash

Returns the hash of the header.

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impl<Number, Hash> MallocSizeOf for Header<Number, Hash> where
    Number: Copy + Into<U256> + TryFrom<U256> + MallocSizeOf,
    Hash: HashT,
    Hash::Output: MallocSizeOf,

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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. Read more

fn constant_size() -> Option<usize>

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. Read more

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impl<Number: PartialEq + Copy + Into<U256> + TryFrom<U256>, Hash: PartialEq + HashT> PartialEq<Header<Number, Hash>> for Header<Number, Hash> where
    Hash::Output: PartialEq,
    Hash::Output: PartialEq,
    Hash::Output: PartialEq,
    Hash::Output: PartialEq,

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fn eq(&self, other: &Header<Number, Hash>) -> bool

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

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fn ne(&self, other: &Header<Number, Hash>) -> bool

This method tests for !=.

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> Serialize for Header<Number, Hash> where
    Hash::Output: Serialize,
    Hash::Output: Serialize,
    Hash::Output: Serialize,

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

Serialize this value into the given Serde serializer. Read more

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> EncodeLike<Header<Number, Hash>> for Header<Number, Hash> where
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Hash::Output: Encode,
    Digest<Hash::Output>: Encode,
    Digest<Hash::Output>: Encode,
    Number: HasCompact,

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impl<Number: Eq + Copy + Into<U256> + TryFrom<U256>, Hash: Eq + HashT> Eq for Header<Number, Hash> where
    Hash::Output: Eq,
    Hash::Output: Eq,
    Hash::Output: Eq,
    Hash::Output: Eq,

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> StructuralEq for Header<Number, Hash>

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impl<Number: Copy + Into<U256> + TryFrom<U256>, Hash: HashT> StructuralPartialEq for Header<Number, Hash>

Auto Trait Implementations

impl<Number, Hash> RefUnwindSafe for Header<Number, Hash> where
    Number: RefUnwindSafe,
    <Hash as Hash>::Output: RefUnwindSafe,

impl<Number, Hash> Send for Header<Number, Hash> where
    Number: Send,

impl<Number, Hash> Sync for Header<Number, Hash> where
    Number: Sync,

impl<Number, Hash> Unpin for Header<Number, Hash> where
    Number: Unpin,
    <Hash as Hash>::Output: Unpin,

impl<Number, Hash> UnwindSafe for Header<Number, Hash> where
    Number: UnwindSafe,
    <Hash as Hash>::Output: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
    T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
    T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
    T: ?Sized,

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pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CheckedConversion for T

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fn checked_from<T>(t: T) -> Option<Self> where
    Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

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fn checked_into<T>(self) -> Option<T> where
    Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> DecodeAll for T where
    T: Decode,

pub fn decode_all(input: &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more

impl<T> DecodeLimit for T where
    T: Decode,

pub fn decode_all_with_depth_limit(limit: u32, input: &[u8]) -> Result<T, Error>

Decode Self and consume all of the given input data. Read more

pub fn decode_with_depth_limit(limit: u32, input: &[u8]) -> Result<T, Error>

Decode Self with the given maximum recursion depth. Read more

impl<T> Downcast for T where
    T: Any,

pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<R, Global>
impl<R> Read for Box<R, Global> where
    R: Read + ?Sized, impl<W> Write for Box<W, Global> where
    W: Write + ?Sized, impl<F, A> Future for Box<F, A> where
    F: Future + Unpin + ?Sized,
    A: Allocator + 'static,     type Output = <F as Future>::Output;impl<I, A> Iterator for Box<I, A> where
    I: Iterator + ?Sized,
    A: Allocator,     type Item = <I as Iterator>::Item;

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

pub fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

impl<T> DowncastSync for T where
    T: Any + Send + Sync,

pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

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impl<T> DynClone for T where
    T: Clone,

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pub fn __clone_box(&self, Private) -> *mut ()

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into<U> for T where
    U: From<T>,

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pub fn into(self) -> U

Performs the conversion.

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impl<T, Outer> IsWrappedBy<Outer> for T where
    T: From<Outer>,
    Outer: AsRef<T> + AsMut<T> + From<T>,

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pub fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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pub fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> KeyedVec for T where
    T: Codec,

pub fn to_keyed_vec(&self, prepend_key: &[u8]) -> Vec<u8, Global>

Return an encoding of Self prepended by given slice.

impl<T> MallocSizeOfExt for T where
    T: MallocSizeOf,

fn malloc_size_of(&self) -> usize

Method to launch a heapsize measurement with a fresh state. Read more

impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T> SaturatedConversion for T

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fn saturated_from<T>(t: T) -> Self where
    Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more

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fn saturated_into<T>(self) -> T where
    Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more

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impl<T> ToOwned for T where
    T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom<U> for T where
    U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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impl<T, U> TryInto<U> for T where
    U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>,

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pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

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impl<T, S> UniqueSaturatedInto<T> for S where
    T: Bounded,
    S: TryInto<T>,

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pub fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,

pub fn vzip(self) -> V

impl<S> Codec for S where
    S: Decode + Encode,

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impl<T> DeserializeOwned for T where
    T: for<'de> Deserialize<'de>,

impl<'_, '_, T> EncodeLike<&'_ &'_ T> for T where
    T: Encode,

impl<'_, T> EncodeLike<&'_ T> for T where
    T: Encode,

impl<'_, T> EncodeLike<&'_ mut T> for T where
    T: Encode,

impl<T> EncodeLike<Arc<T>> for T where
    T: Encode,

impl<T> EncodeLike<Box<T, Global>> for T where
    T: Encode,

impl<'a, T> EncodeLike<Cow<'a, T>> for T where
    T: ToOwned + Encode,

impl<T> EncodeLike<Rc<T>> for T where
    T: Encode,

impl<S> FullCodec for S where
    S: Decode + FullEncode,

impl<S> FullEncode for S where
    S: Encode + EncodeLike<S>,

impl<T> MaybeDebug for T where
    T: Debug,

impl<T> MaybeDebug for T where
    T: Debug,

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impl<T> MaybeMallocSizeOf for T where
    T: MallocSizeOf,

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impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe,

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impl<T> MaybeSerialize for T where
    T: Serialize,

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impl<T> MaybeSerializeDeserialize for T where
    T: DeserializeOwned + Serialize,

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impl<T> Member for T where
    T: 'static + Send + Sync + Debug + Eq + PartialEq<T> + Clone,