pub struct Spend<AnchorV: AnchorVariant> {
    pub cv: NotSmallOrderValueCommitment,
    pub per_spend_anchor: AnchorV::PerSpend,
    pub nullifier: Nullifier,
    pub rk: ValidatingKey,
    pub zkproof: Groth16Proof,
    pub spend_auth_sig: Signature<SpendAuth>,
}
Expand description

A Spend Description, as described in protocol specification §7.3.

§Differences between Transaction Versions

In Transaction::V4, each Spend has its own anchor. In Transaction::V5, there is a single shared_anchor for the entire transaction. This structural difference is modeled using the AnchorVariant type trait.

V4 transactions serialize the fields of spends and outputs together. V5 transactions split them into multiple arrays.

Fields§

§cv: NotSmallOrderValueCommitment

A value commitment to the value of the input note.

§per_spend_anchor: AnchorV::PerSpend

An anchor for this spend.

The anchor is the root of the Sapling note commitment tree in a previous block. This root should be in the best chain for a transaction to be mined, and it must be in the relevant chain for a transaction to be valid.

Some transaction versions have a shared anchor, rather than a per-spend anchor.

§nullifier: Nullifier

The nullifier of the input note.

§rk: ValidatingKey

The randomized public key for spend_auth_sig.

§zkproof: Groth16Proof

The ZK spend proof.

§spend_auth_sig: Signature<SpendAuth>

A signature authorizing this spend.

Implementations§

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impl Spend<SharedAnchor>

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pub fn from_v5_parts( prefix: SpendPrefixInTransactionV5, zkproof: Groth16Proof, spend_auth_sig: Signature<SpendAuth> ) -> Spend<SharedAnchor>

Combine the prefix and non-prefix fields from V5 transaction deserialization.

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pub fn into_v5_parts( self ) -> (SpendPrefixInTransactionV5, Groth16Proof, Signature<SpendAuth>)

Split out the prefix and non-prefix fields for V5 transaction serialization.

Trait Implementations§

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impl Arbitrary for Spend<PerSpendAnchor>

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type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.
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fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more
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type Strategy = BoxedStrategy<Spend<PerSpendAnchor>>

The type of Strategy used to generate values of type Self.
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fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
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impl Arbitrary for Spend<SharedAnchor>

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type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.
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fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more
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type Strategy = BoxedStrategy<Spend<SharedAnchor>>

The type of Strategy used to generate values of type Self.
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fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
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impl<AnchorV: Clone + AnchorVariant> Clone for Spend<AnchorV>
where AnchorV::PerSpend: Clone,

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fn clone(&self) -> Spend<AnchorV>

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl<AnchorV: Debug + AnchorVariant> Debug for Spend<AnchorV>
where AnchorV::PerSpend: Debug,

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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, AnchorV: AnchorVariant> Deserialize<'de> for Spend<AnchorV>
where AnchorV::PerSpend: Deserialize<'de>,

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

Deserialize this value from the given Serde deserializer. Read more
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impl<AnchorV> Display for Spend<AnchorV>
where AnchorV: AnchorVariant + Clone,

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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 From<(Spend<PerSpendAnchor>, FieldNotPresent)> for Spend<PerSpendAnchor>

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fn from(per_spend: (Spend<PerSpendAnchor>, FieldNotPresent)) -> Self

Take the Spend<PerSpendAnchor> from a spend + anchor tuple.

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impl From<(Spend<SharedAnchor>, Root)> for Spend<PerSpendAnchor>

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fn from(shared_spend: (Spend<SharedAnchor>, Root)) -> Self

Convert a Spend<SharedAnchor> and its shared anchor, into a Spend<PerSpendAnchor>.

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impl<AnchorV: PartialEq + AnchorVariant> PartialEq for Spend<AnchorV>
where AnchorV::PerSpend: PartialEq,

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fn eq(&self, other: &Spend<AnchorV>) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<AnchorV: AnchorVariant> Serialize for Spend<AnchorV>
where AnchorV::PerSpend: Serialize,

source§

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl TrustedPreallocate for Spend<PerSpendAnchor>

The maximum number of sapling spends in a valid Zcash on-chain transaction V4.

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fn max_allocation() -> u64

Provides a loose upper bound on the size of the Vec<T: TrustedPreallocate> which can possibly be received from an honest peer.
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impl ZcashDeserialize for Spend<PerSpendAnchor>

source§

fn zcash_deserialize<R: Read>(reader: R) -> Result<Self, SerializationError>

§Consensus

The anchor of each Spend description MUST refer to some earlier block’s final Sapling treestate. The anchor is encoded separately in each Spend description for v4 transactions, or encoded once and shared between all Spend descriptions in a v5 transaction.

https://zips.z.cash/protocol/protocol.pdf#spendsandoutputs

This rule is also implemented in zebra_state::service::check::anchors and crate::transaction::serialize.

The “anchor encoding for v4 transactions” is implemented here.

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impl ZcashSerialize for Spend<PerSpendAnchor>

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fn zcash_serialize<W: Write>(&self, writer: W) -> Result<(), Error>

Write self to the given writer using the canonical format. Read more
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fn zcash_serialize_to_vec(&self) -> Result<Vec<u8>, Error>

Helper function to construct a vec to serialize the current struct into
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fn zcash_serialized_size(&self) -> usize

Get the size of self by using a fake writer.
source§

impl<AnchorV: AnchorVariant + PartialEq> Eq for Spend<AnchorV>

source§

impl<AnchorV: AnchorVariant> StructuralPartialEq for Spend<AnchorV>

Auto Trait Implementations§

§

impl<AnchorV> RefUnwindSafe for Spend<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: RefUnwindSafe,

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impl<AnchorV> Send for Spend<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Send,

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impl<AnchorV> Sync for Spend<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Sync,

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impl<AnchorV> Unpin for Spend<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Unpin,

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impl<AnchorV> UnwindSafe for Spend<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: UnwindSafe,

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where T: 'static + ?Sized,

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Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<Response, Error> ResponseResult<Response, Error> for Response

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fn into_result(self) -> Result<Response, Error>

Converts the type into a Result that can be sent as a response.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> SectionExt for T
where T: Display + Send + Sync + 'static,

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fn header<C>(self, header: C) -> IndentedSection<C, T>
where C: Display + Send + Sync + 'static,

Add a header to a Section and indent the body Read more
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,