Struct bitcoin::blockdata::block::BlockHeader

pub struct BlockHeader {
    pub version: i32,
    pub prev_blockhash: BlockHash,
    pub merkle_root: TxMerkleNode,
    pub time: u32,
    pub bits: u32,
    pub nonce: u32,
}

A block header, which contains all the block’s information except the actual transactions

Fields

version: i32

The protocol version. Should always be 1.

prev_blockhash: BlockHash

Reference to the previous block in the chain

merkle_root: TxMerkleNode

The root hash of the merkle tree of transactions in the block

time: u32

The timestamp of the block, as claimed by the miner

bits: u32

The target value below which the blockhash must lie, encoded as a a float (with well-defined rounding, of course)

nonce: u32

The nonce, selected to obtain a low enough blockhash

Implementations

impl BlockHeader

pub fn block_hash(&self) -> BlockHash

Return the block hash.

pub fn target(&self) -> Uint256

Computes the target [0, T] that a blockhash must land in to be valid

pub fn u256_from_compact_target(bits: u32) -> Uint256

Computes the target value in Uint256 format, from a compact representation.

use bitcoin::blockdata::block::BlockHeader;

assert_eq!(0x1d00ffff,
    BlockHeader::compact_target_from_u256(
        &BlockHeader::u256_from_compact_target(0x1d00ffff)
    )
);

pub fn compact_target_from_u256(value: &Uint256) -> u32

Computes the target value in float format from Uint256 format.

pub fn difficulty(&self, network: Network) -> u64

Compute the popular “difficulty” measure for mining

pub fn validate_pow(
    &self,
    required_target: &Uint256
) -> Result<BlockHash, Error>

Checks that the proof-of-work for the block is valid, returning the block hash.

pub fn work(&self) -> Uint256

Returns the total work of the block

Trait Implementations

impl Clone for BlockHeader

fn clone(&self) -> BlockHeader

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BlockHeader

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

Formats the value using the given formatter.

impl Decodable for BlockHeader

fn consensus_decode<D: Read>(d: D) -> Result<BlockHeader, Error>

Decode an object with a well-defined format

impl Encodable for BlockHeader

fn consensus_encode<S: Write>(&self, s: S) -> Result<usize, Error>

Encode an object with a well-defined format. Returns the number of bytes written on success.

impl PartialEq<BlockHeader> for BlockHeader

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

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

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

This method tests for !=.

impl Copy for BlockHeader

impl Eq for BlockHeader

impl StructuralEq for BlockHeader

impl StructuralPartialEq for BlockHeader