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ecc::chip.rs: Stub out scalar-mul-related structs and types. 

These will be updated or restored in #111.
This commit is contained in:
therealyingtong 2021-06-12 06:09:15 +08:00
parent e1779dab70
commit aec7a7f850
1 changed files with 6 additions and 30 deletions
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36
src/circuit/gadget/ecc/chip.rs
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@ -1,7 +1,6 @@
use super::EccInstructions;
use crate::circuit::gadget::utilities::{copy, CellValue, Var};
use crate::constants::{self, OrchardFixedBasesFull, ValueCommitV};
use arrayvec::ArrayVec;
use crate::constants;
use ff::{Field, PrimeFieldBits};
use halo2::{
arithmetic::CurveAffine,
@ -175,40 +174,17 @@ where
}
}
/// A full-width scalar used for fixed-base scalar multiplication.
/// This is decomposed in chunks of `window_width` bits in little-endian order.
/// For example, if `window_width` = 3, we will have [k_0, k_1, ..., k_n]
/// where `scalar = k_0 + k_1 * (2^3) + ... + k_n * (2^3)^n` and each `k_i` is
/// in the range [0..2^3).
#[derive(Clone, Debug)]
pub struct EccScalarFixed<C: CurveAffine> {
value: Option<C::Scalar>,
windows: ArrayVec<CellValue<C::Base>, { constants::NUM_WINDOWS }>,
}
/// A signed short scalar used for fixed-base scalar multiplication.
/// This is decomposed in chunks of `window_width` bits in little-endian order.
/// For example, if `window_width` = 3, we will have [k_0, k_1, ..., k_n]
/// where `scalar = k_0 + k_1 * (2^3) + ... + k_n * (2^3)^n` and each `k_i` is
/// in the range [0..2^3).
#[derive(Clone, Debug)]
pub struct EccScalarFixedShort<C: CurveAffine> {
magnitude: Option<C::Scalar>,
sign: CellValue<C::Base>,
windows: ArrayVec<CellValue<C::Base>, { constants::NUM_WINDOWS_SHORT }>,
}
impl<C: CurveAffine> EccInstructions<C> for EccChip<C>
where
C::Scalar: PrimeFieldBits,
{
type ScalarFixed = EccScalarFixed<C>;
type ScalarFixedShort = EccScalarFixedShort<C>;
type ScalarVar = CellValue<C::Base>;
type ScalarFixed = (); // TODO
type ScalarFixedShort = (); // TODO
type ScalarVar = (); // TODO
type Point = EccPoint<C>;
type X = CellValue<C::Base>;
type FixedPoints = OrchardFixedBasesFull<C>;
type FixedPointsShort = ValueCommitV<C>;
type FixedPoints = (); // TODO
type FixedPointsShort = (); // TODO
fn witness_scalar_var(
&self,