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Rust 1.80

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Preserves the fn accessors within the Monero crates so that we can use statics
in some cfgs yet not all (in order to provide support for more low-memory
devices) with the exception of `H` (which truly should be cached).
This commit is contained in:
Luke Parker
2024-07-26 19:20:04 -04:00
parent 6f34c2ff77
commit 880565cb81
38 changed files with 147 additions and 195 deletions
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17
networks/monero/primitives/src/lib.rs
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@@ -5,7 +5,7 @@
use std_shims::{io, vec::Vec};
#[cfg(feature = "std")]
use std_shims::sync::OnceLock;
use std_shims::sync::LazyLock;
use zeroize::{Zeroize, ZeroizeOnDrop};
@@ -28,15 +28,15 @@ mod tests;
// On std, we cache some variables in statics.
#[cfg(feature = "std")]
static INV_EIGHT_CELL: OnceLock<Scalar> = OnceLock::new();
/// The inverse of 8 over l.
static INV_EIGHT_CELL: LazyLock<Scalar> = LazyLock::new(|| Scalar::from(8u8).invert());
/// The inverse of 8 over l, the prime factor of the order of Ed25519.
#[cfg(feature = "std")]
#[allow(non_snake_case)]
pub fn INV_EIGHT() -> Scalar {
*INV_EIGHT_CELL.get_or_init(|| Scalar::from(8u8).invert())
*INV_EIGHT_CELL
}
// In no-std environments, we prefer the reduced memory use and calculate it ad-hoc.
/// The inverse of 8 over l.
/// The inverse of 8 over l, the prime factor of the order of Ed25519.
#[cfg(not(feature = "std"))]
#[allow(non_snake_case)]
pub fn INV_EIGHT() -> Scalar {
@@ -44,12 +44,13 @@ pub fn INV_EIGHT() -> Scalar {
}
#[cfg(feature = "std")]
static G_PRECOMP_CELL: OnceLock<VartimeEdwardsPrecomputation> = OnceLock::new();
static G_PRECOMP_CELL: LazyLock<VartimeEdwardsPrecomputation> =
LazyLock::new(|| VartimeEdwardsPrecomputation::new([ED25519_BASEPOINT_POINT]));
/// A cached (if std) pre-computation of the Ed25519 generator, G.
#[cfg(feature = "std")]
#[allow(non_snake_case)]
pub fn G_PRECOMP() -> &'static VartimeEdwardsPrecomputation {
G_PRECOMP_CELL.get_or_init(|| VartimeEdwardsPrecomputation::new([ED25519_BASEPOINT_POINT]))
&G_PRECOMP_CELL
}
/// A cached (if std) pre-computation of the Ed25519 generator, G.
#[cfg(not(feature = "std"))]
@@ -105,7 +106,7 @@ impl Commitment {
/// Calculate the Pedersen commitment, as a point, from this transparent structure.
pub fn calculate(&self) -> EdwardsPoint {
EdwardsPoint::vartime_double_scalar_mul_basepoint(&Scalar::from(self.amount), &H(), &self.mask)
EdwardsPoint::vartime_double_scalar_mul_basepoint(&Scalar::from(self.amount), &H, &self.mask)
}
/// Write the Commitment.