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Replace lazy_static with OnceLock inside monero-serai

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lazy_static, if no_std environments were used, effectively required always
using spin locks. This resolves the ergonomics of that while adopting Rust std
code.

no_std does still use a spin based solution. Theoretically, we could use
atomics, yet writing our own Mutex wasn't a priority.
This commit is contained in:
Luke Parker
2023-06-28 21:16:33 -04:00
parent 8ced63eaac
commit d25c668ee4
17 changed files with 212 additions and 129 deletions
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21
coins/monero/src/lib.rs
View File

@@ -1,20 +1,15 @@
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
#![doc = include_str!("../README.md")]
use std::io;
use std_shims::{sync::OnceLock, io};
use lazy_static::lazy_static;
use rand_core::{RngCore, CryptoRng};
use zeroize::{Zeroize, ZeroizeOnDrop};
use sha3::{Digest, Keccak256};
use curve25519_dalek::{
constants::ED25519_BASEPOINT_TABLE,
scalar::Scalar,
edwards::{EdwardsPoint, EdwardsBasepointTable},
};
use curve25519_dalek::{constants::ED25519_BASEPOINT_TABLE, scalar::Scalar, edwards::EdwardsPoint};
pub use monero_generators::H;
@@ -37,6 +32,12 @@ pub mod wallet;
#[cfg(test)]
mod tests;
static INV_EIGHT_CELL: OnceLock<Scalar> = OnceLock::new();
#[allow(non_snake_case)]
pub(crate) fn INV_EIGHT() -> Scalar {
*INV_EIGHT_CELL.get_or_init(|| Scalar::from(8u8).invert())
}
/// Monero protocol version. v15 is omitted as v15 was simply v14 and v16 being active at the same
/// time, with regards to the transactions supported. Accordingly, v16 should be used during v15.
#[derive(Clone, Copy, PartialEq, Eq, Debug, Zeroize)]
@@ -107,10 +108,6 @@ impl Protocol {
}
}
lazy_static! {
static ref H_TABLE: EdwardsBasepointTable = EdwardsBasepointTable::create(&H);
}
/// Transparent structure representing a Pedersen commitment's contents.
#[allow(non_snake_case)]
#[derive(Clone, PartialEq, Eq, Debug, Zeroize, ZeroizeOnDrop)]
@@ -131,7 +128,7 @@ impl Commitment {
/// Calculate a Pedersen commitment, as a point, from the transparent structure.
pub fn calculate(&self) -> EdwardsPoint {
(&self.mask * &ED25519_BASEPOINT_TABLE) + (&Scalar::from(self.amount) * &*H_TABLE)
(&self.mask * &ED25519_BASEPOINT_TABLE) + (Scalar::from(self.amount) * H())
}
}