pub struct Height(pub u32);Expand description
The length of the chain back to the genesis block.
Two Heights can’t be added, but they can be subtracted to get their difference,
represented as an HeightDiff. This difference can then be added to or subtracted from a
Height. Note the similarity with chrono::DateTime and chrono::Duration.
§Invariants
Users should not construct block heights greater than Height::MAX.
§Consensus
There are multiple formats for serializing a height, so we don’t implement
ZcashSerialize or ZcashDeserialize for Height.
Tuple Fields§
§0: u32Implementations§
Source§impl Height
impl Height
Sourcepub const MIN: Height
pub const MIN: Height
The minimum Height.
Due to the underlying type, it is impossible to construct block heights
less than Height::MIN.
Style note: Sometimes, Height::MIN is less readable than
Height(0). Use whichever makes sense in context.
Sourcepub const MAX: Height
pub const MAX: Height
The maximum Height.
Users should not construct block heights greater than Height::MAX.
The spec says “Implementations MUST support block heights up to and including 2^31 − 1”.
Note that u32::MAX / 2 == 2^31 - 1 == i32::MAX.
Sourcepub const MAX_AS_U32: u32 = 2_147_483_647u32
pub const MAX_AS_U32: u32 = 2_147_483_647u32
Sourcepub const MAX_EXPIRY_HEIGHT: Height
pub const MAX_EXPIRY_HEIGHT: Height
The maximum expiration Height that is allowed in all transactions
previous to Nu5 and in non-coinbase transactions from Nu5 activation
height and above.
Sourcepub fn next(self) -> Result<Self, HeightError>
pub fn next(self) -> Result<Self, HeightError>
Sourcepub fn previous(self) -> Result<Self, HeightError>
pub fn previous(self) -> Result<Self, HeightError>
Trait Implementations§
Source§impl Arbitrary for Height
impl Arbitrary for Height
Source§type Parameters = ()
type Parameters = ()
The type of parameters that
arbitrary_with accepts for configuration
of the generated Strategy. Parameters must implement Default.Source§type Strategy = BoxedStrategy<Height>
type Strategy = BoxedStrategy<Height>
The type of
Strategy used to generate values of type Self.Source§fn arbitrary_with(_args: ()) -> Self::Strategy
fn arbitrary_with(_args: ()) -> Self::Strategy
Source§impl<'de> Deserialize<'de> for Height
impl<'de> Deserialize<'de> for Height
Source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Source§impl Ord for Height
impl Ord for Height
Source§impl PartialOrd for Height
impl PartialOrd for Height
Source§impl Sub<i64> for Height
impl Sub<i64> for Height
Source§fn sub(self, rhs: HeightDiff) -> Option<Self>
fn sub(self, rhs: HeightDiff) -> Option<Self>
Subtract a height difference from a height, returning None if the resulting height is
outside the valid Height range (this also checks the result is non-negative).
impl Copy for Height
impl Eq for Height
impl StructuralPartialEq for Height
Auto Trait Implementations§
impl Freeze for Height
impl RefUnwindSafe for Height
impl Send for Height
impl Sync for Height
impl Unpin for Height
impl UnwindSafe for Height
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