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

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

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

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Attempt to deserialise the value from input.

Attempt to skip the encoded value from input. Read more

Returns the fixed encoded size of the type. Read more

Deserialize this value from the given Serde deserializer. Read more

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

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

Convert self to an owned vector.

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

Calculates the encoded size. Read more

Header number.

Header hash type

Hashing algorithm

Returns a reference to the header number.

Sets the header number.

Returns a reference to the extrinsics root.

Sets the extrinsic root.

Returns a reference to the state root.

Sets the state root.

Returns a reference to the parent hash.

Sets the parent hash.

Returns a reference to the digest.

Get a mutable reference to the digest.

Creates new header.

Returns the hash of the header.

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

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

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

This method tests for !=.

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

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

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

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

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

Decode Self with the given maximum recursion depth. Read more

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

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

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

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

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

Performs the conversion.

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

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

Performs the conversion.

Get a reference to the inner from the outer.

Get a mutable reference to the inner from the outer.

Return an encoding of Self prepended by given slice.

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

Should always be Self

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

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

The resulting type after obtaining ownership.

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

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

recently added

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

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The counterpart to unchecked_from.

Consume self to return an equivalent value of T.