Struct ckb_jsonrpc_types::Header

pub struct Header {
    pub version: Version,
    pub compact_target: Uint32,
    pub timestamp: Timestamp,
    pub number: BlockNumber,
    pub epoch: EpochNumberWithFraction,
    pub parent_hash: H256,
    pub transactions_root: H256,
    pub proposals_hash: H256,
    pub uncles_hash: H256,
    pub dao: Byte32,
    pub nonce: Uint128,
}

The block header.

Refer to RFC CKB Block Structure.

Fields

version: Version

The block version.

It must equal to 0 now and is reserved for future upgrades.

compact_target: Uint32

The block difficulty target.

It can be converted to a 256-bit target. Miners must ensure the Eaglesong of the header is within the target.

timestamp: Timestamp

The block timestamp.

It is a Unix timestamp in milliseconds (1 second = 1000 milliseconds).

Miners should put the time when the block is created in the header, however, the precision is not guaranteed. A block with a higher block number may even have a smaller timestamp.

number: BlockNumber

The consecutive block number starting from 0.

epoch: EpochNumberWithFraction

The epoch information of this block.

See EpochNumberWithFraction for details.

parent_hash: H256

The header hash of the parent block.

transactions_root: H256

The commitment to all the transactions in the block.

It is a hash on two Merkle Tree roots:

• The root of a CKB Merkle Tree, which items are the transaction hashes of all the transactions in the block.
• The root of a CKB Merkle Tree, but the items are the transaction witness hashes of all the transactions in the block.

proposals_hash: H256

The hash on proposals in the block body.

It is all zeros when proposals is empty, or the hash on all the bytes concatenated together.

uncles_hash: H256

The hash on uncles in the block body.

It is all zeros when uncles is empty, or the hash on all the uncle header hashes concatenated together.

dao: Byte32

DAO fields.

See RFC Deposit and Withdraw in Nervos DAO.

nonce: Uint128

Miner can modify this field to find a proper value such that the Eaglesong of the header is within the target encoded from compact_target.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a copy 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 Default for Header

fn default() -> Header

Returns the “default value” for a 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 From<Header> for Header

fn from(input: Header) -> Self

Performs the conversion.

impl From<Header> for Header

fn from(json: Header) -> Self

Performs the conversion.

impl Hash for Header

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<Header> for Header

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

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

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

This method tests for !=.

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 Eq for Header

impl StructuralEq for Header

impl StructuralPartialEq for Header