Trait sp_runtime::traits::Header[−][src]

pub trait Header: Clone + Send + Sync + Codec + Eq + MaybeSerialize + Debug + MaybeMallocSizeOf + 'static {
    type Number: Member + MaybeSerializeDeserialize + Debug + Hash + Copy + MaybeDisplay + AtLeast32BitUnsigned + Codec + FromStr + MaybeMallocSizeOf;
    type Hash: Member + MaybeSerializeDeserialize + Debug + Hash + Ord + Copy + MaybeDisplay + Default + SimpleBitOps + Codec + AsRef<[u8]> + AsMut<[u8]> + MaybeMallocSizeOf;
    type Hashing: Hash<Output = Self::Hash>;
    fn new(
        number: Self::Number, 
        extrinsics_root: Self::Hash, 
        state_root: Self::Hash, 
        parent_hash: Self::Hash, 
        digest: Digest<Self::Hash>
    ) -> Self;

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

    fn set_number(&mut self, number: Self::Number);

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

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

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

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

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

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

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

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

    fn hash(&self) -> Self::Hash { ... }
}

Something which fulfills the abstract idea of a Substrate header. It has types for a Number, a Hash and a Hashing. It provides access to an extrinsics_root, state_root and parent_hash, as well as a digest and a block number.

You can also create a new one from those fields.

Associated Types

type Number: Member + MaybeSerializeDeserialize + Debug + Hash + Copy + MaybeDisplay + AtLeast32BitUnsigned + Codec + FromStr + MaybeMallocSizeOf[src]

Header number.

type Hash: Member + MaybeSerializeDeserialize + Debug + Hash + Ord + Copy + MaybeDisplay + Default + SimpleBitOps + Codec + AsRef<[u8]> + AsMut<[u8]> + MaybeMallocSizeOf[src]

Header hash type

type Hashing: Hash<Output = Self::Hash>[src]

Hashing algorithm

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Required methods

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

Creates new header.

fn number(&self) -> &Self::Number[src]

Returns a reference to the header number.

fn set_number(&mut self, number: Self::Number)[src]

Sets the header number.

fn extrinsics_root(&self) -> &Self::Hash[src]

Returns a reference to the extrinsics root.

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

Sets the extrinsic root.

fn state_root(&self) -> &Self::Hash[src]

Returns a reference to the state root.

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

Sets the state root.

fn parent_hash(&self) -> &Self::Hash[src]

Returns a reference to the parent hash.

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

Sets the parent hash.

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

Returns a reference to the digest.

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

Get a mutable reference to the digest.

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Provided methods

fn hash(&self) -> Self::Hash[src]

Returns the hash of the header.

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Implementors

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, [src]

type Number = Number

type Hash = <Hash as HashT>::Output

type Hashing = Hash

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