Add solidity verifier of the nova+cyclefold (#87)

* Add solidity verifier of the nova+cyclefold, and add method to prepare the calldata from Decider's proof. Missing conversion of the point coordinates into limbs (ark compatible)

* chore: adding comments linking to the contract's signature

* chore: update .gitignore

* chore: add num-bigint as dev dependency

* fix: work with abs path for storing generated sol code

* chore: update comment

* feat: solidity verifier working on single and multi-input circuits

* feat: multi-input folding verification working + fixing encoding of additive identity in calldata

* chore: make bigint a dependency

* refactor: import utils functions from utils.rs and make them available from anywhere

* chore: make utils and evm available publicly

* fix: pub mod instead

* chore: make relevant method public and add `get_decider_template_for_cyclefold_decider` to exported objects

* solidity-verifiers: move tests to their corresponding files

* small update: Cyclefold -> CycleFold at the missing places

* abstract nova-cyclefold solidity verifiers tests to avoid code duplication, and abstract also the computed setup params (FS & Decider) to compute them only once for all related tests to save test time

* small polish after rebase to last main branch changes

* rm unneeded Option for KZGData::g1_crs_batch_points

* add checks modifying z_0 & z_i to nova_cyclefold_solidity_verifier test

* add light-test feature to decider_eth_circuit to use it in solidity-verifier tests without the big circuit

* solidity-verifiers: groth16 template: port the fix from https://github.com/iden3/snarkjs/pull/480 & https://github.com/iden3/snarkjs/issues/479

* add print warning msg for light-test in DeciderEthCircuit

* solidity-verifiers: update limbs logic to nonnative last version, parametrize limbs params

solidity-verifiers:
* update solidity limbs logic to last nonnative impl version, and to
  last u_i.x impl
* parametrize limbs params
* add light-test feature: replace the '#[cfg(not(test))]' by the
  'light-test' feature that by default is not enabled, so when running
  the github actions we enable the feature 'light-tests', and then we can
  have a full-test that runs the test without the 'light-tests' flag, but
  we don't run this big test every time.  The choice of a feature is to
  allow us to control this from other-crates tests (for example for the
  solidity-verifier separated crate tests, to avoid running the full heavy
  circuit in the solidity tests)

* move solidity constants into template constants for auto compute of params

* polishing

* revm use only needed feature

This is to avoid c depencency for c-kzg which is behind the c-kzg flag
and not needed.

* nova_cyclefold_decider.sol header

* rearrange test helpers position, add error for min number of steps

* in solidity-verifiers: 'data'->'vk/verifier key'

* add From for NovaCycleFoldVerifierKey from original vks to simplify dev flow, also conditionally template the batchCheck related structs and methods from the KZG10 solidity template

---------

Co-authored-by: dmpierre <pdaixmoreux@gmail.com>

solidity-verifiers/Cargo.toml

@@ -12,19 +12,23 @@ ark-groth16 = "0.4"
 askama = { version = "0.12.0", features = ["config"], default-features = false }
 ark-bn254 = "0.4.0"
 ark-poly-commit = "0.4.0"
-folding-schemes = { path = "../folding-schemes/" }
 itertools = "0.12.1"
 ark-serialize = "0.4.1"
-revm = "3.5.0"
+revm = {version="3.5.0", default-features=false, features=["std"]}
+rust-crypto = "0.2"
+num-bigint = "0.4.3"
+folding-schemes = { path = "../folding-schemes/"} # without 'light-test' enabled
 
 [dev-dependencies]
 ark-crypto-primitives = "0.4.0"
-ark-groth16 = "0.4"
 ark-r1cs-std = "0.4.0"
 ark-relations = "0.4.0"
-revm = "3.5.0"
 tracing = { version = "0.1", default-features = false, features = [ "attributes" ] }
 tracing-subscriber = { version = "0.2" }
+ark-bn254 = {version="0.4.0", features=["r1cs"]}
+ark-grumpkin = {version="0.4.0", features=["r1cs"]}
+rand = "0.8.5"
+folding-schemes = { path = "../folding-schemes/", features=["light-test"]}
 
 [features]
 default = ["parallel"]