Browse Source
Traits for witnesses and committed instances (#157)
* Add traits for witness and committed instance
* Implement witness and committed instance traits for Nova and HyperNova
* Implement witness and committed instance traits for ProtoGalaxy
* Improve the clarity of docs for `Witness{Var}Ext::get_openings`
* Avoid cloning `z_i`
* Fix grammar issues
* Rename `Ext` traits for committed instances and witnesses to `Ops`
* Implement `to_sponge_bytes`
main
winderica
3 months ago
committed by
GitHub
GitHub
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
15 changed files with 566 additions and 329 deletions
Split View
Diff Options
-
+16 -3folding-schemes/src/folding/hypernova/cccs.rs
-
+119 -82folding-schemes/src/folding/hypernova/circuits.rs
-
+9 -9folding-schemes/src/folding/hypernova/decider_eth_circuit.rs
-
+15 -28folding-schemes/src/folding/hypernova/lcccs.rs
-
+20 -16folding-schemes/src/folding/hypernova/mod.rs
-
+1 -0folding-schemes/src/folding/mod.rs
-
+73 -59folding-schemes/src/folding/nova/circuits.rs
-
+12 -10folding-schemes/src/folding/nova/decider_eth_circuit.rs
-
+26 -31folding-schemes/src/folding/nova/mod.rs
-
+2 -1folding-schemes/src/folding/nova/zk.rs
-
+24 -27folding-schemes/src/folding/protogalaxy/circuits.rs
-
+80 -60folding-schemes/src/folding/protogalaxy/mod.rs
-
+46 -3folding-schemes/src/folding/protogalaxy/traits.rs
-
+121 -0folding-schemes/src/folding/traits.rs
-
+2 -0folding-schemes/src/lib.rs
@ -0,0 +1,121 @@ |
|||
use ark_crypto_primitives::sponge::{
|
|||
constraints::{AbsorbGadget, CryptographicSpongeVar},
|
|||
poseidon::constraints::PoseidonSpongeVar,
|
|||
Absorb,
|
|||
};
|
|||
use ark_ec::CurveGroup;
|
|||
use ark_ff::PrimeField;
|
|||
use ark_r1cs_std::{alloc::AllocVar, fields::fp::FpVar, ToConstraintFieldGadget};
|
|||
use ark_relations::r1cs::SynthesisError;
|
|||
|
|||
use crate::{transcript::Transcript, Error};
|
|||
|
|||
use super::circuits::CF1;
|
|||
|
|||
pub trait CommittedInstanceOps<C: CurveGroup> {
|
|||
/// The in-circuit representation of the committed instance.
|
|||
type Var: AllocVar<Self, CF1<C>> + CommittedInstanceVarOps<C>;
|
|||
/// `hash` implements the committed instance hash compatible with the
|
|||
/// in-circuit implementation from `CommittedInstanceVarOps::hash`.
|
|||
///
|
|||
/// Returns `H(i, z_0, z_i, U_i)`, where `i` can be `i` but also `i+1`, and
|
|||
/// `U_i` is the committed instance `self`.
|
|||
fn hash<T: Transcript<CF1<C>>>(
|
|||
&self,
|
|||
sponge: &T,
|
|||
pp_hash: CF1<C>, // public params hash
|
|||
i: CF1<C>,
|
|||
z_0: &[CF1<C>],
|
|||
z_i: &[CF1<C>],
|
|||
) -> CF1<C>
|
|||
where
|
|||
CF1<C>: Absorb,
|
|||
Self: Sized + Absorb,
|
|||
{
|
|||
let mut sponge = sponge.clone();
|
|||
sponge.absorb(&pp_hash);
|
|||
sponge.absorb(&i);
|
|||
sponge.absorb(&z_0);
|
|||
sponge.absorb(&z_i);
|
|||
sponge.absorb(&self);
|
|||
sponge.squeeze_field_elements(1)[0]
|
|||
}
|
|||
|
|||
/// Returns the commitments contained in the committed instance.
|
|||
fn get_commitments(&self) -> Vec<C>;
|
|||
|
|||
/// Returns `true` if the committed instance is an incoming instance, and
|
|||
/// `false` if it is a running instance.
|
|||
fn is_incoming(&self) -> bool;
|
|||
|
|||
/// Checks if the committed instance is an incoming instance.
|
|||
fn check_incoming(&self) -> Result<(), Error> {
|
|||
self.is_incoming()
|
|||
.then_some(())
|
|||
.ok_or(Error::NotIncomingCommittedInstance)
|
|||
}
|
|||
}
|
|||
|
|||
pub trait CommittedInstanceVarOps<C: CurveGroup> {
|
|||
type PointVar: ToConstraintFieldGadget<CF1<C>>;
|
|||
/// `hash` implements the in-circuit committed instance hash compatible with
|
|||
/// the native implementation from `CommittedInstanceOps::hash`.
|
|||
/// Returns `H(i, z_0, z_i, U_i)`, where `i` can be `i` but also `i+1`, and
|
|||
/// `U_i` is the committed instance `self`.
|
|||
///
|
|||
/// Additionally it returns the in-circuit representation of the committed
|
|||
/// instance `self` as a vector of field elements, so they can be reused in
|
|||
/// other gadgets avoiding recalculating (reconstraining) them.
|
|||
#[allow(clippy::type_complexity)]
|
|||
fn hash(
|
|||
&self,
|
|||
sponge: &PoseidonSpongeVar<CF1<C>>,
|
|||
pp_hash: &FpVar<CF1<C>>,
|
|||
i: &FpVar<CF1<C>>,
|
|||
z_0: &[FpVar<CF1<C>>],
|
|||
z_i: &[FpVar<CF1<C>>],
|
|||
) -> Result<(FpVar<CF1<C>>, Vec<FpVar<CF1<C>>>), SynthesisError>
|
|||
where
|
|||
Self: AbsorbGadget<CF1<C>>,
|
|||
{
|
|||
let mut sponge = sponge.clone();
|
|||
let U_vec = self.to_sponge_field_elements()?;
|
|||
sponge.absorb(&pp_hash)?;
|
|||
sponge.absorb(&i)?;
|
|||
sponge.absorb(&z_0)?;
|
|||
sponge.absorb(&z_i)?;
|
|||
sponge.absorb(&U_vec)?;
|
|||
Ok((sponge.squeeze_field_elements(1)?.pop().unwrap(), U_vec))
|
|||
}
|
|||
|
|||
/// Returns the commitments contained in the committed instance.
|
|||
fn get_commitments(&self) -> Vec<Self::PointVar>;
|
|||
|
|||
/// Returns the public inputs contained in the committed instance.
|
|||
fn get_public_inputs(&self) -> &[FpVar<CF1<C>>];
|
|||
|
|||
/// Generates constraints to enforce that the committed instance is an
|
|||
/// incoming instance.
|
|||
fn enforce_incoming(&self) -> Result<(), SynthesisError>;
|
|||
|
|||
/// Generates constraints to enforce that the committed instance `self` is
|
|||
/// partially equal to another committed instance `other`.
|
|||
/// Here, only field elements are compared, while commitments (points) are
|
|||
/// not.
|
|||
fn enforce_partial_equal(&self, other: &Self) -> Result<(), SynthesisError>;
|
|||
}
|
|||
|
|||
pub trait WitnessOps<F: PrimeField> {
|
|||
/// The in-circuit representation of the witness.
|
|||
type Var: AllocVar<Self, F> + WitnessVarOps<F>;
|
|||
|
|||
/// Returns the openings (i.e., the values being committed to and the
|
|||
/// randomness) contained in the witness.
|
|||
fn get_openings(&self) -> Vec<(&[F], F)>;
|
|||
}
|
|||
|
|||
pub trait WitnessVarOps<F: PrimeField> {
|
|||
/// Returns the openings (i.e., the values being committed to and the
|
|||
/// randomness) contained in the witness.
|
|||
fn get_openings(&self) -> Vec<(&[FpVar<F>], FpVar<F>)>;
|
|||
}
|
|||