- implement the IVC `FoldingScheme` trait for HyperNova
- refactor Nova's preprocess logic to make it simplier to use
- add to Decider trait (& Nova's DeciderEth) a preprocess method
- get rid of the `init_nova_ivc_params` and `init_ivc_and_decider_params` methods in `examples` since this is achieved with the `FS::preprocess` & `Decider::preprocess` methods
  - (update the examples code to the simplified interface using
    FS::preprocess & Decider::preprocess)

- add LCCCS.hash methods (native & r1cs)
- add HyperNova's AugmentedFCircuit with tests

* add HyperNova's NIMFS verifier circuit

* update poseidon usage after rebasing to latest main branch changes

* change: Refactor structure into workspace

* chore: Add empty readme

* change: Transform repo into workspace

* add: Create folding-verifier-solidity crate

* add: Include askama.toml for `sol` extension escaper

* add: Jordi's old Groth16 verifier .sol template and adapt it

* tmp: create simple template struct to test

* Update FoldingSchemes trait, fit Nova+CycleFold

- update lib.rs's `FoldingScheme` trait interface
- fit Nova+CycleFold into the `FoldingScheme` trait
- refactor `src/nova/*`

* chore: add serialization assets for testing

Now we include an `assets` folder with a serialized proof & vk for tests

* Add `examples` dir, with Nova's `FoldingScheme` example

* polishing

* expose poseidon_test_config outside tests

* change: Refactor structure into workspace

* chore: Add empty readme

* change: Transform repo into workspace

* add: Create folding-verifier-solidity crate

* add: Include askama.toml for `sol` extension escaper

* add: Jordi's old Groth16 verifier .sol template and adapt it

* tmp: create simple template struct to test

* feat: templating kzg working

* chore: add emv and revm

* feat: start evm file

* chore: add ark-poly-commit

* chore: move `commitment` to `folding-schemes`

* chore: update `.gitignore` to ignore generated contracts

* chore: update template with bn254 lib on it (avoids import), update for loop to account for whitespaces

* refactor: update template with no lib

* feat: add evm deploy code, compile and create kzg verifier

* chore: update `Cargo.toml` to have `folding-schemes` available with verifiers

* feat: start kzg prove and verify with sol

* chore: compute crs from kzg prover

* feat: evm kzg verification passing

* tmp

* change: Swap order of G2 coordinates within the template

* Update way to serialize proof with correct order

* chore: update `Cargo.toml`

* chore: add revm

* chore: add `save_solidity`

* refactor: verifiers in dedicated mod

* refactor: have dedicated `utils` module

* chore: expose modules

* chore: update verifier for kzg

* chore: rename templates

* fix: look for binary using also name of contract

* refactor: generate groth16 proof for sha256 pre-image, generate groth16 template with verifying key

* chore: template renaming

* fix: switch circuit for circuit that simply adds

* feat: generates test data on the fly

* feat: update to latest groth16 verifier

* refactor: rename folder, update `.gitignore`

* chore: update `Cargo.toml`

* chore: update templates extension to indicate that they are templates

* chore: rename templates, both files and structs

* fix: template inheritance working

* feat: template spdx and pragma statements

* feat: decider verifier compiles, update test for kzg10 and groth16 templates

* feat: parameterize which size of the crs should be stored on the contract

* chore: add comment on how the groth16 and kzg10 proofs will be linked together

* chore: cargo clippy run

* chore: cargo clippy tests

* chore: cargo fmt

* refactor: remove unused lifetime parameter

* chore: end merge

* chore: move examples to `folding-schemes` workspace

* get latest main changes

* fix: temp fix clippy warnings, will remove lints once not used in tests only

* fix: cargo clippy lint added on `code_size`

* fix: update path to test circuit and add step for installing solc

* chore: remove `save_solidity` steps

* fix: the borrowed expression implements the required traits

* chore: update `Cargo.toml`

* chore: remove extra `[patch.crates-io]`

* fix: update to patch at the workspace level and add comment explaining this

* refactor: correct `staticcall` with valid input/output sizes and change return syntax for pairing

* refactor: expose modules and remove `dead_code` calls

* chore: update `README.md`, add additional comments on `kzg10` template and update `groth16` template comments

* chore: be clearer on attributions on `kzg10`

---------

Co-authored-by: CPerezz <c.perezbaro@gmail.com>
Co-authored-by: arnaucube <root@arnaucube.com>

* feat: start hypernova nimfs verifier

* refactor: change where nimfs verifier lives

* feat: `EqEvalGadget` for computing `eq(x, y)`

* refactor: rename to `utils.rs`

* feat: implement a `VecFpVar` struct, representing a vector of `FpVar`s

* refactor: extract a `sum_muls_gamma_pows_eq_sigma` function to make circuit tests easier

* feat: implement a `SumMulsGammaPowEqSigmaGadget` to compute the first term of the sum of section 5, step 5

* refactor: update gadget name and method name to match `sum_muls_gamma_pows_eq_sigma`

* fix: update method call

* refactor: remove usage of `GammaVar`

Co-authored-by: arnaucube <root@arnaucube.com>

* refactor: move hypernova circuit related types and methods into `src/folding/hypernova/circuits.rs`

* refactor: remove all of `GammaVar` wrapper

* chore: update type to `&[F]`

* refactor: update from `new_constant` to `new_witness`

* fix: actual file deletion

* refactor: remove `VecFpVar` struct

* chore: update comment doc

* refactor: extract a `sum_ci_mul_prod_thetaj` function for testing

* feat: `test_sum_ci_mul_prod_thetaj_gadget` passing

* refactor: update docs and add a helper `get_prepared_thetas` function

* refactor: clearer arg name

* fix: clippy typing

* chore: correct latex comments

* refactor: remove unncessary `get_prepared_thetas` fn

* feat: test passing for rough first pass on `ComputeCFromSigmasAndThetasGadget`

* chore: add additional doc comments

* chore: add `#[allow(clippy::too_many_arguments)]`

* refactor: make gadget generic over a curve group

* chore: clippy fixes

* chore: correct latex in doc comment

* refactor: refactor `sum_muls_gamma_pows_eq_sigma` and `sum_ci_mul_prod_thetaj` in `ComputeCFromSigmasAndThetasGadget`

---------

Co-authored-by: arnaucube <root@arnaucube.com>

* Port HyperNova's multifolding from https://github.com/privacy-scaling-explorations/multifolding-poc adapting and refactoring some of its methods and structs.

Note: adapted mle.rs methods from dense to sparse repr.

Co-authored-by: George Kadianakis <desnacked@riseup.net>

* HyperNova: move CCS struct outside of LCCCS & CCCS

HyperNova nimfs: move CCS structure outside of LCCCS & CCCS, to avoid
carrying around the whole CCS and duplicating data when is not needed.

Also add feature flags for the folding schemes.

---------

Co-authored-by: George Kadianakis <desnacked@riseup.net>