Struct Header 

pub struct Header {
    pub parent_hash: Hash,
    pub number: BlockNumber,
    pub timestamp: Timestamp,
    pub state_root: Hash,
    pub extrinsics_root: Hash,
    pub digest: Vec<Vec<u8>>,
    pub author: AccountId,
    pub epoch: u32,
    pub slot: u32,
}

JAM block header

Fields

parent_hash: Hash

Hash of the parent block

number: BlockNumber

Block number (height in the chain)

timestamp: Timestamp

Block timestamp (milliseconds since Unix epoch)

state_root: Hash

State root hash after applying this block

extrinsics_root: Hash

Hash of extrinsics/transactions root

digest: Vec<Vec<u8>>

Additional header data and proofs

author: AccountId

Block author

epoch: u32

Current epoch

slot: u32

Slot within epoch

Implementations

impl Header

pub fn new( parent_hash: Hash, number: BlockNumber, timestamp: Timestamp, state_root: Hash, extrinsics_root: Hash, author: AccountId, epoch: u32, slot: u32, ) -> Self

Create a new header

pub fn is_genesis(&self) -> bool

Check if this is a genesis block header

pub fn encoded_size(&self) -> usize

Get encoded size of the header

pub fn verify_basic(&self) -> PrimitiveResult<()>

Verify the header is well-formed

pub fn verify_against_parent(&self, parent: &Header) -> PrimitiveResult<()>

Verify header against parent

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header

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

Formats the value using the given formatter.

impl Decode for Header

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

Attempt to deserialise the value from input.

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.

fn skip<I>(input: &mut I) -> Result<(), Error>

where I: Input,

Attempt to skip the encoded value from input.

fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl<'de> Deserialize<'de> for Header

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for Header

fn size_hint(&self) -> usize

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

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

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

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

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.

impl EncodeLike for Header

impl Eq for Header

impl Hashable for Header

fn hash(&self) -> Hash

impl PartialEq for Header

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Header

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Header

impl Validate for Header

fn validate(&self) -> PrimitiveResult<()>