mirror of https://github.com/zcash/orchard.git
Add a `Bundle::binding_validating_key` method
This derives the `bvk` for validating `Authorized::binding_signature`.
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@ -7,7 +7,7 @@ use crate::{
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note::{ExtractedNoteCommitment, Nullifier, TransmittedNoteCiphertext},
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primitives::redpallas::{self, Binding, SpendAuth},
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tree::Anchor,
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value::ValueCommitment,
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value::{ValueCommitTrapdoor, ValueCommitment, ValueSum},
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};
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/// An action applied to the global ledger.
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@ -300,6 +300,22 @@ impl<T: Authorization, V> Bundle<T, V> {
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}
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}
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impl<T: Authorization, V: Copy + Into<ValueSum>> Bundle<T, V> {
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/// Returns the transaction binding validating key for this bundle.
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///
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/// This can be used to validate the [`Authorized::binding_signature`] returned from
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/// [`Bundle::authorization`].
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pub fn binding_validating_key(&self) -> redpallas::VerificationKey<Binding> {
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(self
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.actions
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.iter()
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.map(|a| a.cv_net())
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.sum::<ValueCommitment>()
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- ValueCommitment::derive(self.value_balance.into(), ValueCommitTrapdoor::zero()))
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.into_bvk()
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}
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}
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/// Authorizing data for a bundle of actions, ready to be committed to the ledger.
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#[derive(Debug, Clone)]
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pub struct Authorized {
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