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Unify the computation of digests and challenges in different folding schemes (#94)

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* Remove the trait bound `C::BaseField: PrimeField` for better DX

* Methods in `TranscriptVar` now exactly matches the ones in `Transcript`

* Add `ProtoGalaxyTranscriptVar` and `CommittedInstanceVar` for protogalaxy

* betas are unnecessary in "plain" (incoming) instances

* Absorb the result of `get_challenge_nbits` as well

* `ProtoGalaxyTranscript` now allows absorbing mulitple instances

* Always return `Result<(), SynthesisError>` in `ProtoGalaxyTranscriptVar`

* Impl `Transcript{Var}` for `PoseidonSponge{Var}` directly and remove `PoseidonTranscript{Var}`

* `Transcript::absorb_point` doesn't need to return `Error`

* Add `AbsorbNonNative` trait for hashing non-native values

Note that now `absorb_point` only supports hashing points whose BaseField is equal to the sponge's field

* More efficient `TranscriptVar::absorb_point` by securely removing `is_inf`

* Use `sponge` and `transcript` consistently

* Clarify the usage of `AbsorbNonNative{Gadget}`

* Generic `sponge` and `transcript` params

* Avoid unstable `associated_type_bounds`

* Reuse `sponge` in hypernova

* Clean up redundant imports

* Remove unstable code

* Clarify the usage of `absorb_point` and `absorb_nonnative`
This commit is contained in:
winderica
2024-07-08 09:25:08 +01:00
committed by GitHub
parent c17fcf56c6
commit 16d51d757b
36 changed files with 1030 additions and 1033 deletions
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14
solidity-verifiers/src/verifiers/kzg.rs
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@@ -78,7 +78,8 @@ mod tests {
utils::HeaderInclusion,
ProtocolVerifierKey,
};
use ark_bn254::{Bn254, Fr, G1Projective as G1};
use ark_bn254::{Bn254, Fr};
use ark_crypto_primitives::sponge::{poseidon::PoseidonSponge, CryptographicSponge};
use ark_ec::{AffineRepr, CurveGroup};
use ark_ff::{BigInteger, PrimeField};
use ark_std::rand::{RngCore, SeedableRng};
@@ -89,10 +90,7 @@ mod tests {
use folding_schemes::{
commitment::{kzg::KZG, CommitmentScheme},
transcript::{
poseidon::{poseidon_canonical_config, PoseidonTranscript},
Transcript,
},
transcript::{poseidon::poseidon_canonical_config, Transcript},
};
use super::KZG10Verifier;
@@ -133,8 +131,8 @@ mod tests {
fn kzg_verifier_accepts_and_rejects_proofs() {
let mut rng = ark_std::rand::rngs::StdRng::seed_from_u64(test_rng().next_u64());
let poseidon_config = poseidon_canonical_config::<Fr>();
let transcript_p = &mut PoseidonTranscript::<G1>::new(&poseidon_config);
let transcript_v = &mut PoseidonTranscript::<G1>::new(&poseidon_config);
let transcript_p = &mut PoseidonSponge::<Fr>::new(&poseidon_config);
let transcript_v = &mut PoseidonSponge::<Fr>::new(&poseidon_config);
let (_, kzg_pk, kzg_vk, _, _, _) = setup(DEFAULT_SETUP_LEN);
let kzg_vk = KZG10VerifierKey::from((kzg_vk.clone(), kzg_pk.powers_of_g[0..3].to_vec()));
@@ -159,7 +157,7 @@ mod tests {
let (x_proof, y_proof) = proof_affine.xy().unwrap();
let y = proof.eval.into_bigint().to_bytes_be();
transcript_v.absorb_point(&cm).unwrap();
transcript_v.absorb_nonnative(&cm);
let x = transcript_v.get_challenge();
let x = x.into_bigint().to_bytes_be();