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Add init function for BP statics

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Considering they take 7 seconds to generate, thanks to #68, the ability 
to generate them at the start instead of on first BP is greatly 
appreciated.

Also performs minor cleanups regarding BPs.
This commit is contained in:
Luke Parker
2022-08-02 15:52:27 -04:00
parent 9221dbf048
commit a30568ff57
9 changed files with 68 additions and 24 deletions
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12
coins/monero/src/ringct/bulletproofs/core.rs
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@@ -29,6 +29,7 @@ pub(crate) fn hash_to_scalar(data: &[u8]) -> Scalar {
// Components common between variants
pub(crate) const MAX_M: usize = 16;
pub(crate) const LOG_N: usize = 6; // 2 << 6 == N
pub(crate) const N: usize = 64;
pub(crate) const MAX_MN: usize = MAX_M * N;
@@ -77,9 +78,6 @@ pub(crate) fn hash_cache(cache: &mut Scalar, mash: &[[u8; 32]]) -> Scalar {
}
pub(crate) fn MN(outputs: usize) -> (usize, usize, usize) {
let logN = 6;
debug_assert_eq!(N, 1 << logN);
let mut logM = 0;
let mut M;
while {
@@ -89,7 +87,7 @@ pub(crate) fn MN(outputs: usize) -> (usize, usize, usize) {
logM += 1;
}
(logM + logN, M, M * N)
(logM + LOG_N, M, M * N)
}
pub(crate) fn bit_decompose(commitments: &[Commitment]) -> (ScalarVector, ScalarVector) {
@@ -152,6 +150,12 @@ lazy_static! {
pub(crate) static ref TWO_N: ScalarVector = ScalarVector::powers(Scalar::from(2u8), N);
}
pub(crate) fn init() {
let _ = &*INV_EIGHT;
let _ = &*H;
let _ = &*TWO_N;
}
pub(crate) fn challenge_products(w: &[Scalar], winv: &[Scalar]) -> Vec<Scalar> {
let mut products = vec![Scalar::zero(); 1 << w.len()];
products[0] = winv[0];