pub struct H256(pub [u8; 32]);
Expand description
The 32-byte fixed-length binary data.
The name comes from the number of bits in the data.
In JSONRPC, it is encoded as a 0x-prefixed hex string.
Tuple Fields§
§0: [u8; 32]
Implementations§
§impl H256
impl H256
pub fn from_trimmed_str(input: &str) -> Result<H256, FromStrError>
pub fn from_trimmed_str(input: &str) -> Result<H256, FromStrError>
To convert a trimmed hexadecimal string into Self
.
If the beginning of a hexadecimal string are one or more zeros, then these zeros should be omitted.
There should be only one zero at the beginning of a hexadecimal string at most.
For example, if x
is H16
(a 16 bits binary data):
- when
x = [0, 0]
, the trimmed hexadecimal string should be “0” or “”. - when
x = [0, 1]
, the trimmed hexadecimal string should be “1”. - when
x = [1, 0]
, the trimmed hexadecimal string should be “100”.
use ckb_fixed_hash_core::H256 as Hash;
const BYTES_SIZE: usize = 32;
let mut inner = [0u8; BYTES_SIZE];
{
let actual = Hash(inner.clone());
let expected1 = Hash::from_trimmed_str("").unwrap();
let expected2 = Hash::from_trimmed_str("0").unwrap();
assert_eq!(actual, expected1);
assert_eq!(actual, expected2);
}
{
inner[BYTES_SIZE - 1] = 1;
let actual = Hash(inner);
let expected = Hash::from_trimmed_str("1").unwrap();
assert_eq!(actual, expected);
}
{
assert!(Hash::from_trimmed_str("00").is_err());
assert!(Hash::from_trimmed_str("000").is_err());
assert!(Hash::from_trimmed_str("0000").is_err());
assert!(Hash::from_trimmed_str("01").is_err());
assert!(Hash::from_trimmed_str("001").is_err());
assert!(Hash::from_trimmed_str("0001").is_err());
}
Trait Implementations§
§impl<'de> Deserialize<'de> for H256
impl<'de> Deserialize<'de> for H256
§fn deserialize<D>(
deserializer: D
) -> Result<H256, <D as Deserializer<'de>>::Error>where
D: Deserializer<'de>,
fn deserialize<D>( deserializer: D ) -> Result<H256, <D as Deserializer<'de>>::Error>where D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
§impl Ord for H256
impl Ord for H256
§impl PartialOrd<H256> for H256
impl PartialOrd<H256> for H256
§fn partial_cmp(&self, other: &H256) -> Option<Ordering>
fn partial_cmp(&self, other: &H256) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read more§impl Serialize for H256
impl Serialize for H256
§fn serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>where
S: Serializer,
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. Read more
source§impl<'r> Unpack<H256> for Byte32Reader<'r>
impl<'r> Unpack<H256> for Byte32Reader<'r>
impl Eq for H256
Auto Trait Implementations§
impl RefUnwindSafe for H256
impl Send for H256
impl Sync for H256
impl Unpin for H256
impl UnwindSafe for H256
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more