Struct 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

Returns 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

Computes 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<(), Error>

Formats the value using the given formatter.

impl Decodable for BlockHeader

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

where D: Read,

Decode Self from a size-limited reader.

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

where D: Read,

Decode an object with a well-defined format

impl<'de> Deserialize<'de> for BlockHeader

fn deserialize<__D>( __deserializer: __D, ) -> Result<BlockHeader, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encodable for BlockHeader

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

where S: Write,

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

impl PartialEq for BlockHeader

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

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.

impl Copy for BlockHeader

impl Eq for BlockHeader

impl StructuralPartialEq for BlockHeader