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Generate uniformly distributed nullifiers.

This commit is contained in:
Kris Nuttycombe 2021-05-05 13:39:41 -06:00
parent aa11eb1372
commit 6c681d0539
1 changed files with 9 additions and 2 deletions
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11
src/note/nullifier.rs
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@ -63,14 +63,21 @@ impl Nullifier {
pub mod testing {
use proptest::prelude::*;
use group::GroupEncoding;
use pasta_curves::pallas;
use super::Nullifier;
use crate::spec::extract_p;
prop_compose! {
/// Generate a uniformly distributed nullifier value.
pub fn arb_nullifier()(elems in prop::array::uniform4(prop::num::u64::ANY)) -> Nullifier {
Nullifier(pallas::Base::from_raw(elems))
pub fn arb_nullifier()(
coord in prop::array::uniform32(any::<u8>()).prop_map(|b| pallas::Point::from_bytes(&b)).prop_filter(
"Must generate a valid Pallas point",
|p| p.is_some().into()
)
) -> Nullifier {
Nullifier(extract_p(&coord.unwrap()))
}
}
}