Struct BlockHash 

pub struct BlockHash(pub [u8; 32]);

A block hash in display order — the byte order bitcoind prints and a chain document’s genesisHash uses; read as a big-endian number it compares directly against a Target.

use sidestr_header::BlockHash;
let h = BlockHash::from_hex("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f").unwrap();
assert_eq!(h.to_string(), "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
assert_eq!(h.to_wire()[0], 0x6f); // wire order is the reverse
assert_eq!(BlockHash::from_wire(h.to_wire()), h);

Tuple Fields

0: [u8; 32]

Implementations

impl BlockHash

pub const ZERO: BlockHash

All zeros: a genesis header’s prev_block_hash.

pub fn from_wire(wire: [u8; 32]) -> Self

From the 32 bytes as they sit in a header (wire / internal order).

pub fn to_wire(self) -> [u8; 32]

The 32 bytes as they sit in a header (wire / internal order).

pub fn from_hex(s: &str) -> Result<Self, Error>

From 64 hex characters in display order.

pub fn meets(&self, target: &Target) -> bool

hash ≤ target, both read as big-endian 256-bit numbers (BigInt('0x' + blockHash) <= expandCompact(bits) in the kernel).

Trait Implementations

impl Clone for BlockHash

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlockHash

impl Debug for BlockHash

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

Formats the value using the given formatter.

impl Display for BlockHash

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

Formats the value using the given formatter.

impl Eq for BlockHash

impl Hash for BlockHash

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for BlockHash

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for BlockHash

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for BlockHash

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for BlockHash