Struct polkadot_service::generic::Header [−][src]
pub struct Header<Number, Hash> where
Number: Copy + Into<U256> + TryFrom<U256>,
Hash: Hash, {
pub parent_hash: <Hash as Hash>::Output,
pub number: Number,
pub state_root: <Hash as Hash>::Output,
pub extrinsics_root: <Hash as Hash>::Output,
pub digest: Digest,
}Expand description
Abstraction over a block header for a substrate chain.
Fields
parent_hash: <Hash as Hash>::OutputThe parent hash.
number: NumberThe block number.
state_root: <Hash as Hash>::OutputThe state trie merkle root
extrinsics_root: <Hash as Hash>::OutputThe merkle root of the extrinsics.
digest: DigestA chain-specific digest of data useful for light clients or referencing auxiliary data.
Implementations
impl<Number, Hash> Header<Number, Hash> where
Number: Member + Hash + Copy + MaybeDisplay + AtLeast32BitUnsigned + Codec + Into<U256> + TryFrom<U256>,
Hash: Hash,
<Hash as Hash>::Output: Default,
<Hash as Hash>::Output: Hash,
<Hash as Hash>::Output: Copy,
<Hash as Hash>::Output: Member,
<Hash as Hash>::Output: MaybeDisplay,
<Hash as Hash>::Output: SimpleBitOps,
<Hash as Hash>::Output: Codec,
impl<Number, Hash> Header<Number, Hash> where
Number: Member + Hash + Copy + MaybeDisplay + AtLeast32BitUnsigned + Codec + Into<U256> + TryFrom<U256>,
Hash: Hash,
<Hash as Hash>::Output: Default,
<Hash as Hash>::Output: Hash,
<Hash as Hash>::Output: Copy,
<Hash as Hash>::Output: Member,
<Hash as Hash>::Output: MaybeDisplay,
<Hash as Hash>::Output: SimpleBitOps,
<Hash as Hash>::Output: Codec,
pub fn new_from_number(
number: <Header<u64, BlakeTwo256> as Header>::Number
) -> Header<u64, BlakeTwo256>
pub fn new_from_number(
number: <Header<u64, BlakeTwo256> as Header>::Number
) -> Header<u64, BlakeTwo256>
A new header with the given number and default hash for all other fields.
Trait Implementations
pub fn deserialize<__D>(
__deserializer: __D
) -> Result<Header<Number, Hash>, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
pub 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
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: Hash,
<Hash as Hash>::Output: Default,
<Hash as Hash>::Output: Hash,
<Hash as Hash>::Output: Copy,
<Hash as Hash>::Output: Member,
<Hash as Hash>::Output: Ord,
<Hash as Hash>::Output: MaybeSerialize,
<Hash as Hash>::Output: Debug,
<Hash as Hash>::Output: MaybeDisplay,
<Hash as Hash>::Output: SimpleBitOps,
<Hash as Hash>::Output: Codec,
<Hash as Hash>::Output: MaybeMallocSizeOf,
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: Hash,
<Hash as Hash>::Output: Default,
<Hash as Hash>::Output: Hash,
<Hash as Hash>::Output: Copy,
<Hash as Hash>::Output: Member,
<Hash as Hash>::Output: Ord,
<Hash as Hash>::Output: MaybeSerialize,
<Hash as Hash>::Output: Debug,
<Hash as Hash>::Output: MaybeDisplay,
<Hash as Hash>::Output: SimpleBitOps,
<Hash as Hash>::Output: Codec,
<Hash as Hash>::Output: MaybeMallocSizeOf,
type Number = Number
type Number = Number
Header number.
type Hashing = Hash
type Hashing = Hash
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.
Get a mutable reference to the digest.
Creates new header.
impl<Number, Hash> MallocSizeOf for Header<Number, Hash> where
Number: Copy + Into<U256> + TryFrom<U256> + MallocSizeOf,
Hash: Hash,
<Hash as Hash>::Output: MallocSizeOf,
impl<Number, Hash> MallocSizeOf for Header<Number, Hash> where
Number: Copy + Into<U256> + TryFrom<U256> + MallocSizeOf,
Hash: Hash,
<Hash as Hash>::Output: MallocSizeOf,
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
pub fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
pub 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
impl<Number, Hash> EncodeLike<Header<Number, Hash>> for Header<Number, Hash> where
Number: Copy + Into<U256> + TryFrom<U256> + HasCompact,
Hash: Hash,
<Hash as Hash>::Output: Encode,
impl<Number, Hash> Eq for Header<Number, Hash> where
Number: Eq + Copy + Into<U256> + TryFrom<U256>,
Hash: Eq + Hash,
<Hash as Hash>::Output: Eq,
Auto Trait Implementations
impl<Number, Hash> RefUnwindSafe for Header<Number, Hash> where
Number: RefUnwindSafe,
<Hash as Hash>::Output: RefUnwindSafe,
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
Mutably borrows from an owned value. 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
Compare self to key and return true if they are equal.
Causes self to use its Binary implementation when Debug-formatted.
Causes self to use its Display implementation when
Debug-formatted. Read more
Causes self to use its LowerExp implementation when
Debug-formatted. Read more
Causes self to use its LowerHex implementation when
Debug-formatted. Read more
Causes self to use its Octal implementation when Debug-formatted.
Causes self to use its Pointer implementation when
Debug-formatted. Read more
Causes self to use its UpperExp implementation when
Debug-formatted. Read more
Causes self to use its UpperHex implementation when
Debug-formatted. Read more
Instruments this type with the provided Span, returning an
Instrumented wrapper. Read more
Method to launch a heapsize measurement with a fresh state. Read more
Pipes by value. This is generally the method you want to use. Read more
Borrows self and passes that borrow into the pipe function. Read more
Mutably borrows self and passes that borrow into the pipe function. Read more
Borrows self, then passes self.borrow() into the pipe function. Read more
Mutably borrows self, then passes self.borrow_mut() into the pipe
function. Read more
Borrows self, then passes self.as_ref() into the pipe function.
Mutably borrows self, then passes self.as_mut() into the pipe
function. Read more
Borrows self, then passes self.deref() into the pipe function.
fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: AsRef<T>,
T: 'a,
R: 'a,
fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: AsRef<T>,
T: 'a,
R: 'a,
Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more
fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: Borrow<T>,
T: 'a,
R: 'a,
fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: Borrow<T>,
T: 'a,
R: 'a,
Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more
fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
Self: Deref,
R: 'a,
fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
Self: Deref,
R: 'a,
Pipes a dereference into a function that cannot normally be called in suffix position. Read more
Pipes a reference into a function that cannot ordinarily be called in suffix position. Read more
The inverse inclusion map: attempts to construct self from the equivalent element of its
superset. Read more
Checks if self is actually part of its subset T (and can be converted to it).
Use with care! Same as self.to_subset but without any property checks. Always succeeds.
The inclusion map: converts self to the equivalent element of its superset.
Immutable access to the Borrow<B> of a value. Read more
Mutable access to the BorrowMut<B> of a value. Read more
Immutable access to the AsRef<R> view of a value. Read more
Mutable access to the AsMut<R> view of a value. Read more
Immutable access to the Deref::Target of a value. Read more
Mutable access to the Deref::Target of a value. Read more
Calls .tap() only in debug builds, and is erased in release builds.
Calls .tap_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_borrow() only in debug builds, and is erased in release
builds. Read more
Calls .tap_borrow_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_ref() only in debug builds, and is erased in release
builds. Read more
Calls .tap_ref_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_deref() only in debug builds, and is erased in release
builds. Read more
Provides immutable access to the reference for inspection.
Calls tap_ref in debug builds, and does nothing in release builds.
Provides mutable access to the reference for modification.
Calls tap_ref_mut in debug builds, and does nothing in release builds.
Provides immutable access to the borrow for inspection. Read more
Calls tap_borrow in debug builds, and does nothing in release builds.
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
Provides mutable access to the borrow for modification.
Immutably dereferences self for inspection.
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
Calls tap_deref in debug builds, and does nothing in release builds.
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
Mutably dereferences self for modification.
The counterpart to unchecked_from.
Consume self to return an equivalent value of T.
Attaches the provided Subscriber to this type, returning a
WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a
WithDispatch wrapper. Read more
Attaches the provided Subscriber to this type, returning a
WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a
WithDispatch wrapper. Read more