1#![allow(non_snake_case)]
 2#![allow(non_upper_case_globals)]
 3
 4use ark_ec::CurveGroup;
 5use ark_ff::PrimeField;
 6use ark_std::{fmt::Debug, rand::RngCore};
 7use thiserror::Error;
 8
 9pub mod transcript;
10use transcript::Transcript;
11pub mod ccs;
12pub mod folding;
13pub mod pedersen;
14pub mod utils;
15
16#[derive(Debug, Error)]
17pub enum Error {
18    #[error("Relation not satisfied")]
19    NotSatisfied,
20}
21
22/// FoldingScheme defines trait that is implemented by the diverse folding schemes. It is defined
23/// over a cycle of curves (C1, C2), where:
24/// - C1 is the main curve, which ScalarField we use as our F for al the field operations
25/// - C2 is the auxiliary curve, which we use for the commitments, whose BaseField (for point
26/// coordinates) are in the C1::ScalarField.
27/// In other words, C1.Fq == C2.Fr, and C1.Fr == C2.Fq.
28pub trait FoldingScheme<C1: CurveGroup, C2: CurveGroup>: Clone + Debug
29where
30    C1: CurveGroup<BaseField = C2::ScalarField, ScalarField = C2::BaseField>,
31    C2::BaseField: PrimeField,
32{
33    type PreprocessorParam: Debug;
34    type ProverParam: Debug;
35    type VerifierParam: Debug;
36    type Witness: Debug;
37    type CommittedInstanceWithWitness: Debug;
38    type CommittedInstance: Clone + Debug;
39
40    fn preprocess(
41        prep_param: &Self::PreprocessorParam,
42    ) -> Result<(Self::ProverParam, Self::VerifierParam), Error>;
43
44    fn init_accumulator(
45        pp: &Self::ProverParam,
46    ) -> Result<Self::CommittedInstanceWithWitness, Error>;
47
48    fn prove(
49        pp: &Self::ProverParam,
50        running_instance: &mut Self::CommittedInstanceWithWitness,
51        incomming_instances: &[Self::Witness],
52        transcript: &mut impl Transcript<C1>,
53    ) -> Result<(), Error>;
54
55    fn verify(
56        vp: &Self::VerifierParam,
57        running_instance: &mut Self::CommittedInstance,
58        incomming_instances: &[Self::CommittedInstance],
59        transcript: &mut impl Transcript<C1>,
60    ) -> Result<(), Error>;
61}
62
63pub trait Decider<C: CurveGroup>: Clone + Debug {
64    type PreprocessorParam: Debug;
65    type ProverParam: Debug;
66    type VerifierParam: Debug;
67    type FreshInstance: Debug;
68    type PublicInput: Debug;
69    type CommittedInstanceWithWitness: Debug;
70    type CommittedInstance: Clone + Debug;
71
72    fn prove(
73        pp: &Self::ProverParam,
74        running_instance: &Self::CommittedInstanceWithWitness,
75        transcript: &mut impl Transcript<C>,
76        rng: impl RngCore,
77    ) -> Result<(), Error>;
78
79    fn verify(
80        vp: &Self::VerifierParam,
81        running_instance: &Self::CommittedInstance,
82        transcript: &mut impl Transcript<C>,
83        rng: impl RngCore,
84    ) -> Result<(), Error>;
85}