spawn_zk_snarks/
circuits.rs

1// Copyright (c) 2023 spawn-zk-snarks developers
2//
3// Licensed under the MIT License
4// <LICENSE-MIT or http://opensource.org/licenses/MIT>
5
6use thiserror::Error;
7use ark_ff::Field;
8use ark_relations::r1cs::{
9    ConstraintSynthesizer, ConstraintSystemRef, SynthesisError, LinearCombination,
10};
11
12/// Errors that can occur during circuit operations
13#[derive(Error, Debug)]
14pub enum CircuitError {
15    /// Error during circuit compilation
16    #[error("Circuit compilation failed")]
17    CompilationError,
18    /// Error in constraint system
19    #[error("Constraint system error")]
20    ConstraintError,
21}
22
23/// Basic arithmetic circuit for ZKP
24#[derive(Debug, Clone)]
25pub struct ArithmeticCircuit<F: Field> {
26    /// Number of constraints in the circuit
27    pub num_constraints: usize,
28    /// Number of variables used in the circuit
29    pub num_variables: usize,
30    /// Number of public inputs
31    pub num_inputs: usize,
32    /// Private witness values
33    pub witness: Vec<F>,
34}
35
36impl<F: Field> ArithmeticCircuit<F> {
37    /// Create a new arithmetic circuit with specified parameters
38    pub fn new(num_constraints: usize, num_variables: usize, num_inputs: usize) -> Self {
39        Self {
40            num_constraints,
41            num_variables,
42            num_inputs,
43            witness: Vec::new(),
44        }
45    }
46
47    /// Compile circuit for EVM verification
48    pub fn compile_for_evm(&self) -> Result<Vec<u8>, CircuitError> {
49        // TODO: Implement actual circuit compilation
50        Ok(Vec::new())
51    }
52}
53
54impl<F: Field> ConstraintSynthesizer<F> for ArithmeticCircuit<F> {
55    fn generate_constraints(
56        self,
57        cs: ConstraintSystemRef<F>,
58    ) -> Result<(), SynthesisError> {
59        // Basit bir örnek: a * b = c kısıtlaması
60        let a = cs.new_witness_variable(|| Ok(F::one()))?;
61        let b = cs.new_witness_variable(|| Ok(F::one()))?;
62        let c = cs.new_input_variable(|| Ok(F::one()))?;
63
64        let lc_a = LinearCombination::<F>::from(a);
65        let lc_b = LinearCombination::<F>::from(b);
66        let lc_c = LinearCombination::<F>::from(c);
67
68        cs.enforce_constraint(lc_a, lc_b, lc_c)?;
69
70        Ok(())
71    }
72}
73
74/// Circuit configuration for EVM
75#[allow(dead_code)]
76#[derive(Debug, Clone)]
77pub struct EVMCircuitConfig {
78    pub max_constraint_complexity: usize,
79    pub optimize_for_gas: bool,
80}
spawn_zk_snarks/circuits.rs

spawn_zk_snarks/
circuits.rs
