penumbra_tct

Enum Witness

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pub enum Witness {
    Forget,
    Keep,
}
Expand description

When inserting a Commitment into a Tree, should we Keep it to allow it to be witnessed later, or Forget about it after updating the root hash of the tree?

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Forget

When inserting a Commitment into a Tree, this flag indicates that we should immediately forget about it to save space, because we will not want to witness its presence later.

This is equivalent to inserting the commitment using Witness::Keep and then immediately forgetting that same commitment using Tree::forget, though it is more efficient to directly forget commitments upon insertion rather than to remember them on insertion and then immediately forget them.

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Keep

When inserting a Commitment into a Tree, this flag indicates that we should keep this commitment to allow it to be witnessed later.

Trait Implementations§

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impl Clone for Witness

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fn clone(&self) -> Witness

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Witness

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for Witness

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fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for Witness

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Witness

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl PartialEq for Witness

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Witness

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer. Read more
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impl Copy for Witness

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impl Eq for Witness

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impl StructuralPartialEq for Witness

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Immutably borrows from an owned value. Read more
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Mutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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Converts self into T using Into<T>. Read more
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Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Compare self to key and return true if they are equal.
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fn equivalent(&self, key: &K) -> bool

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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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Causes self to use its UpperHex implementation when Debug-formatted.
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