pub type Header = Header<BlockNumber, BlakeTwo256>;
Expand description

Opaque block header type.

Aliased Type§

struct Header {
    pub parent_hash: H256,
    pub number: u32,
    pub state_root: H256,
    pub extrinsics_root: H256,
    pub digest: Digest,
}

Fields§

§parent_hash: H256

The parent hash.

§number: u32

The block number.

§state_root: H256

The state trie merkle root

§extrinsics_root: H256

The merkle root of the extrinsics.

§digest: Digest

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: Hash,

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

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

Trait Implementations

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

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impl<Number, Hash> PartialEq for Header<Number, Hash>
where Number: PartialEq + Copy + Into<U256> + TryFrom<U256>, Hash: PartialEq + Hash, <Hash as 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 ==.
1.0.0 · source§

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

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

Deserialize this value from the given Serde deserializer. Read more
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impl<Number, Hash> Clone for Header<Number, Hash>
where Number: Clone + Copy + Into<U256> + TryFrom<U256>, Hash: Clone + Hash, <Hash as Hash>::Output: Clone,

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

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl<Number, Hash> Encode for Header<Number, Hash>
where Number: Copy + Into<U256> + TryFrom<U256> + HasCompact, Hash: Hash, <Hash as Hash>::Output: Encode,

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fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding. Read more
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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.
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fn encode(&self) -> Vec<u8>

Convert self to an owned vector.
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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.
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fn encoded_size(&self) -> usize

Calculates the encoded size. Read more
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impl<Number, Hash> Decode for Header<Number, Hash>
where Number: Copy + Into<U256> + TryFrom<U256> + HasCompact, Hash: Hash, <Hash as Hash>::Output: Decode,

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

Attempt to deserialise the value from input.
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fn decode_into<I>( input: &mut I, dst: &mut MaybeUninit<Self> ) -> Result<DecodeFinished, Error>
where I: Input,

Attempt to deserialize the value from input into a pre-allocated piece of memory. Read more
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fn skip<I>(input: &mut I) -> Result<(), Error>
where I: Input,

Attempt to skip the encoded value from input. Read more
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fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type. Read more
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impl<Number, Hash> StructuralEq for Header<Number, Hash>
where Number: Copy + Into<U256> + TryFrom<U256>, Hash: Hash,

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

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type Number = Number

Header number.
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type Hash = <Hash as Hash>::Output

Header hash type
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type Hashing = Hash

Hashing algorithm
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fn new( number: <Header<Number, Hash> as Header>::Number, extrinsics_root: <Header<Number, Hash> as Header>::Hash, state_root: <Header<Number, Hash> as Header>::Hash, parent_hash: <Header<Number, Hash> as Header>::Hash, digest: Digest ) -> Header<Number, Hash>

Creates new header.
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fn number(&self) -> &<Header<Number, Hash> as Header>::Number

Returns a reference to the header number.
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fn set_number(&mut self, num: <Header<Number, Hash> as Header>::Number)

Sets the header number.
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fn extrinsics_root(&self) -> &<Header<Number, Hash> as Header>::Hash

Returns a reference to the extrinsics root.
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fn set_extrinsics_root(&mut self, root: <Header<Number, Hash> as Header>::Hash)

Sets the extrinsic root.
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fn state_root(&self) -> &<Header<Number, Hash> as Header>::Hash

Returns a reference to the state root.
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fn set_state_root(&mut self, root: <Header<Number, Hash> as Header>::Hash)

Sets the state root.
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fn parent_hash(&self) -> &<Header<Number, Hash> as Header>::Hash

Returns a reference to the parent hash.
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fn set_parent_hash(&mut self, hash: <Header<Number, Hash> as Header>::Hash)

Sets the parent hash.
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fn digest(&self) -> &Digest

Returns a reference to the digest.
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fn digest_mut(&mut self) -> &mut Digest

Get a mutable reference to the digest.
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fn hash(&self) -> Self::Hash

Returns the hash of the header.
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impl<Number, Hash> StructuralPartialEq for Header<Number, Hash>
where Number: Copy + Into<U256> + TryFrom<U256>, Hash: Hash,

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impl<Number, Hash> TypeInfo for Header<Number, Hash>
where Number: Copy + Into<U256> + TryFrom<U256> + HasCompact + TypeInfo + 'static, Hash: Hash + 'static, <Hash as Hash>::Output: TypeInfo + 'static,

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type Identity = Header<Number, Hash>

The type identifying for which type info is provided. Read more
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fn type_info() -> Type

Returns the static type identifier for Self.
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impl<Number, Hash> Eq for Header<Number, Hash>
where Number: Eq + Copy + Into<U256> + TryFrom<U256>, Hash: Eq + Hash, <Hash as Hash>::Output: Eq,

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

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

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

Formats the value using the given formatter. Read more