feat: zk-helpers crate [skip-line-limit]

Cargo.toml

@@ -34,7 +34,8 @@ members = [
   "crates/trbfv",
   "crates/utils",
   "crates/wasm",
-  "crates/polynomial"
+  "crates/polynomial",
+  "crates/zk-helpers"
 ]
 exclude = [
   "examples/CRISP",
@@ -92,11 +93,14 @@ e3-net = { version = "0.1.7", path = "./crates/net" }
 e3-compute-provider = { version = "0.1.7", path = "./crates/compute-provider" }
 e3-sortition = { version = "0.1.7", path = "./crates/sortition" }
 e3-program-server = { version = "0.1.7", path = "./crates/program-server" }
+e3-polynomial = { version = "0.1.7", path = "./crates/polynomial" }
 e3-support-scripts = { version = "0.1.7", path = "./crates/support-scripts" }
 e3-test-helpers = { version = "0.1.7", path = "./crates/test-helpers" }
 e3-tests = { version = "0.1.7", path = "./crates/tests" }
 e3-trbfv = { version = "0.1.7", path = "./crates/trbfv" }
 e3-utils = { version = "0.1.7", path = "./crates/utils" }
+e3-safe = { version = "0.1.7", path = "./crates/safe" }
+e3-zk-helpers = { version = "0.1.7", path = "./crates/zk-helpers" }
 
 actix = "=0.13.5"
 actix-web = "=4.11.0"
@@ -110,6 +114,8 @@ alloy-primitives = { version = "=1.3.0", default-features = false, features = [
 alloy-sol-types = "=1.3.0"
 alloy-dyn-abi = "=1.3.0"
 argon2 = "=0.5.3"
+ark-ff = "0.5"
+ark-bn254 = "0.5"
 anyhow = "=1.0.98"
 async-std = { version = "=1.13.1", features = ["attributes"] }
 async-trait = "=0.1.88"

circuits/lib/src/math/commitments.nr

@@ -58,6 +58,13 @@ pub global DS_AGGREGATION: [u8; 64] = [
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 ];
+// Domain separator - "CIPHERTEXT"
+pub global DS_CIPHERTEXT: [u8; 64] = [
+    0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x54, 0x45, 0x58, 0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+];
 // Domain separator - "CLG_PK_TRBFV"
 pub global DS_CLG_PK_TRBFV: [u8; 64] = [
     0x43, 0x4c, 0x47, 0x5f, 0x50, 0x4b, 0x5f, 0x54, 0x52, 0x42, 0x46, 0x56, 0x00, 0x00, 0x00, 0x00,
@@ -191,6 +198,16 @@ pub fn compute_aggregation_commitment(payload: Vec<Field>) -> Field {
     compute_safe(DS_AGGREGATION, payload, [0x80000000 | payload.len(), 1]).get(0)
 }
 
+pub fn compute_ciphertext_commitment<let N: u32, let L: u32, let BIT_CT: u32>(
+    ct0: [Polynomial<N>; L],
+    ct1: [Polynomial<N>; L],
+) -> Field {
+    let mut payload = multiple_polynomial_payload::<N, L, BIT_CT>(Vec::new(), ct0);
+    payload = multiple_polynomial_payload::<N, L, BIT_CT>(payload, ct1);
+
+    compute_commitments(payload, DS_CIPHERTEXT, [0x80000000 | payload.len(), 1]).get(0)
+}
+
 /// COMMITMENTS FOR CHALLENGES
 
 pub fn compute_pk_trbfv_challenge<let L: u32>(payload: Vec<Field>) -> Vec<Field> {

crates/Dockerfile

@@ -78,6 +78,7 @@ COPY crates/tests/Cargo.toml ./tests/Cargo.toml
 COPY crates/trbfv/Cargo.toml ./trbfv/Cargo.toml
 COPY crates/utils/Cargo.toml ./utils/Cargo.toml
 COPY crates/wasm/Cargo.toml ./wasm/Cargo.toml
+COPY crates/zk-helpers/Cargo.toml ./zk-helpers/Cargo.toml
 
 RUN echo 'fn main() { println!("cargo:warning=dependency cache build"); }' > ./entrypoint/build.rs
 RUN echo 'fn main() { println!("cargo:warning=dependency cache build"); }' > ./cli/build.rs

crates/bfv-client/Cargo.toml

@@ -14,5 +14,5 @@ fhe.workspace = true
 fhe-traits.workspace = true
 greco = { package = "zkfhe-greco", git = "https://github.com/gnosisguild/zkfhe-generator" }
 rand.workspace = true
-shared = { package = "zkfhe-shared", git = "https://github.com/gnosisguild/zkfhe-generator" }
 thiserror = { workspace = true }
+e3-zk-helpers = { workspace = true }

crates/bfv-client/src/client.rs

@@ -7,14 +7,14 @@
 use anyhow::{anyhow, Result};
 use e3_fhe_params::build_bfv_params_arc;
 use e3_greco_helpers::{bfv_ciphertext_to_greco, bfv_public_key_to_greco};
+use e3_zk_helpers::commitments::{compute_ciphertext_commitment, compute_pk_agg_commitment};
+use e3_zk_helpers::utils::calculate_bit_width;
 use fhe::bfv::{Ciphertext, Encoding, Plaintext, PublicKey};
 use fhe::Error as FheError;
 use fhe_traits::{DeserializeParametrized, FheEncoder, FheEncrypter, Serialize};
 use greco::bounds::GrecoBounds;
 use greco::vectors::GrecoVectors;
 use rand::thread_rng;
-use shared::commitments::compute_poly_commitment;
-use shared::template::calculate_bit_width;
 
 /// Encrypt some data using BFV homomorphic encryption
 ///
@@ -109,7 +109,7 @@ where
 
     let (_, bounds) = GrecoBounds::compute(&params, 0)?;
 
-    let bit_pk = shared::template::calculate_bit_width(&bounds.pk_bounds[0].to_string())?;
+    let bit_pk = calculate_bit_width(&bounds.pk_bounds[0].to_string())?;
 
     // Create Greco input validation ZK proof
     let input_val_vectors = GrecoVectors::compute(
@@ -147,7 +147,7 @@ pub fn compute_pk_commitment(
     let bit_pk = calculate_bit_width(&bounds.pk_bounds[0].to_string())?;
 
     let (pk0is, pk1is) = bfv_public_key_to_greco(&public_key, &params);
-    let commitment_bigint = compute_poly_commitment(&pk0is, &pk1is, bit_pk);
+    let commitment_bigint = compute_pk_agg_commitment(&pk0is, &pk1is, bit_pk);
 
     let bytes = commitment_bigint.to_bytes_be().1;
 
@@ -185,7 +185,7 @@ pub fn compute_ct_commitment(
     let (_, bounds) = GrecoBounds::compute(&params, 0)?;
     let bit_ct = calculate_bit_width(&bounds.pk_bounds[0].to_string())?;
 
-    let commitment_bigint = compute_poly_commitment(&ct0is, &ct1is, bit_ct);
+    let commitment_bigint = compute_ciphertext_commitment(&ct0is, &ct1is, bit_ct);
 
     let bytes = commitment_bigint.to_bytes_be().1;
 

crates/fhe-params/Cargo.toml

@@ -10,7 +10,6 @@ repository = "https://github.com/gnosisguild/enclave/crates/fhe-params"
 fhe = { workspace = true }
 num-bigint = { workspace = true }
 thiserror = { workspace = true }
-shared = { package = "zkfhe-shared", git = "https://github.com/gnosisguild/zkfhe-generator" }
 alloy-dyn-abi = { workspace = true, optional = true }
 alloy-primitives = { workspace = true, optional = true }
 

crates/fhe-params/src/constants.rs

@@ -84,4 +84,9 @@ pub mod defaults {
     /// when variance is not specified. Both variance() and error1_variance default to this value.
     pub const VARIANCE: usize = 10;
     pub const ERROR1_VARIANCE: u32 = 10;
+
+    /// Default insecure security parameter (λ).
+    pub const DEFAULT_INSECURE_LAMBDA: usize = 2;
+    /// Default secure security parameter (λ).
+    pub const DEFAULT_SECURE_LAMBDA: usize = 80;
 }

crates/fhe-params/src/presets.rs

@@ -7,11 +7,12 @@
 use crate::builder::build_pair_for_preset;
 use crate::builder::{build_bfv_params_from_set, build_bfv_params_from_set_arc};
 use crate::constants::{
+    defaults::DEFAULT_INSECURE_LAMBDA,
+    defaults::DEFAULT_SECURE_LAMBDA,
     insecure_512,
     search_defaults::{B, B_CHI},
     secure_8192,
 };
-use shared::{SecurityLevel, DEFAULT_INSECURE_LAMBDA, DEFAULT_SECURE_LAMBDA};
 use std::sync::Arc;
 use thiserror::Error as ThisError;
 
@@ -64,8 +65,6 @@ pub enum BfvPreset {
 pub struct PresetMetadata {
     /// The canonical name of the preset (e.g., "INSECURE_THRESHOLD_BFV_512")
     pub name: &'static str,
-    /// Security level classification (Secure if λ ≥ 80, Insecure otherwise)
-    pub security_level: SecurityLevel,
     /// LWE dimension (d) - the degree of the polynomial ring, must be a power of 2
     ///
     /// This determines the size of the polynomial ring R_q = Z_q[X]/(X^d + 1).
@@ -221,14 +220,12 @@ impl BfvPreset {
         match self {
             BfvPreset::InsecureThresholdBfv512 | BfvPreset::InsecureDkg512 => PresetMetadata {
                 name: self.name(),
-                security_level: SecurityLevel::from_lambda(DEFAULT_INSECURE_LAMBDA),
                 degree: insecure_512::DEGREE,
                 num_parties: insecure_512::NUM_PARTIES,
                 lambda: DEFAULT_INSECURE_LAMBDA,
             },
             BfvPreset::SecureThresholdBfv8192 | BfvPreset::SecureDkg8192 => PresetMetadata {
                 name: self.name(),
-                security_level: SecurityLevel::from_lambda(DEFAULT_SECURE_LAMBDA),
                 degree: secure_8192::DEGREE,
                 num_parties: secure_8192::NUM_PARTIES,
                 lambda: DEFAULT_SECURE_LAMBDA,
@@ -364,13 +361,13 @@ mod tests {
         let metadata = insecure.metadata();
         assert_eq!(metadata.degree, insecure_512::DEGREE);
         assert_eq!(metadata.num_parties, insecure_512::NUM_PARTIES);
-        assert_eq!(metadata.lambda, shared::DEFAULT_INSECURE_LAMBDA);
+        assert_eq!(metadata.lambda, DEFAULT_INSECURE_LAMBDA);
 
         let secure = BfvPreset::SecureThresholdBfv8192;
         let metadata = secure.metadata();
         assert_eq!(metadata.degree, secure_8192::DEGREE);
         assert_eq!(metadata.num_parties, secure_8192::NUM_PARTIES);
-        assert_eq!(metadata.lambda, shared::DEFAULT_SECURE_LAMBDA);
+        assert_eq!(metadata.lambda, DEFAULT_SECURE_LAMBDA);
     }
 
     #[test]
@@ -380,14 +377,14 @@ mod tests {
         assert_eq!(defaults.n, insecure_512::threshold::SEARCH_N);
         assert_eq!(defaults.k, insecure_512::threshold::SEARCH_K);
         assert_eq!(defaults.z, insecure_512::threshold::SEARCH_Z);
-        assert_eq!(defaults.lambda, shared::DEFAULT_INSECURE_LAMBDA as u32);
+        assert_eq!(defaults.lambda, DEFAULT_INSECURE_LAMBDA as u32);
 
         let preset = BfvPreset::SecureThresholdBfv8192;
         let defaults = preset.search_defaults().unwrap();
         assert_eq!(defaults.n, secure_8192::threshold::SEARCH_N);
         assert_eq!(defaults.k, secure_8192::threshold::SEARCH_K);
         assert_eq!(defaults.z, secure_8192::threshold::SEARCH_Z);
-        assert_eq!(defaults.lambda, shared::DEFAULT_SECURE_LAMBDA as u32);
+        assert_eq!(defaults.lambda, DEFAULT_SECURE_LAMBDA as u32);
 
         // DKG presets don't have search defaults
         assert!(BfvPreset::InsecureDkg512.search_defaults().is_none());

crates/greco-helpers/Cargo.toml

@@ -10,7 +10,7 @@ repository = "https://github.com/gnosisguild/enclave/crates/greco-helpers"
 fhe = { workspace = true }
 fhe-math = { git = "https://github.com/gnosisguild/fhe.rs" }
 num-bigint = { workspace = true }
-shared = { package = "zkfhe-shared", git = "https://github.com/gnosisguild/zkfhe-generator" }
+e3-zk-helpers = { workspace = true }
 
 [dev-dependencies]
 e3-fhe-params = { workspace = true }