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Return SpendingKey from Note::dummy 

We need the spending keys to create valid spendAuth signatures for
Actions containing dummy spent notes.
This commit is contained in:
Jack Grigg 2021-04-27 12:25:03 +12:00
parent 5ec65c5d2a
commit 52d87e257c
2 changed files with 9 additions and 5 deletions
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4
src/circuit.rs
View File

@ -180,13 +180,13 @@ mod tests {
let (circuits, instances): (Vec<_>, Vec<_>) = iter::once(())
.map(|()| {
let (fvk, spent_note) = Note::dummy(&mut rng, None);
let (_, fvk, spent_note) = Note::dummy(&mut rng, None);
let nf_old = spent_note.nullifier(&fvk);
let ak: SpendValidatingKey = fvk.into();
let alpha = pallas::Scalar::random(&mut rng);
let rk = ak.randomize(&alpha);
let (_, output_note) = Note::dummy(&mut rng, Some(nf_old.clone()));
let (_, _, output_note) = Note::dummy(&mut rng, Some(nf_old.clone()));
let cmx = output_note.commitment().into();
let value = spent_note.value() - output_note.value();

10
src/note.rs
View File

@ -65,8 +65,12 @@ impl Note {
/// Defined in [Zcash Protocol Spec § 4.8.3: Dummy Notes (Orchard)][orcharddummynotes].
///
/// [orcharddummynotes]: https://zips.z.cash/protocol/nu5.pdf#orcharddummynotes
pub(crate) fn dummy(rng: &mut impl RngCore, rho: Option<Nullifier>) -> (FullViewingKey, Self) {
let fvk: FullViewingKey = (&SpendingKey::random(rng)).into();
pub(crate) fn dummy(
rng: &mut impl RngCore,
rho: Option<Nullifier>,
) -> (SpendingKey, FullViewingKey, Self) {
let sk = SpendingKey::random(rng);
let fvk: FullViewingKey = (&sk).into();
let recipient = fvk.default_address();
let note = Note {
@ -76,7 +80,7 @@ impl Note {
rseed: RandomSeed::random(rng),
};
(fvk, note)
(sk, fvk, note)
}
/// Returns the value of this note.