@zenithcore/core/src/protocol/quantumCircuit.ts

Core functionality for ZenithKernel framework

/**
 * Quantum Circuit Implementation for ZKP
 * 
 * This module provides functionality to create quantum circuits and
 * generate Circom inputs for zero-knowledge proofs.
 */

import * as quantum from 'quantum-zkp-sdk';

/**
 * Generate a Circom input from a data chunk using a quantum circuit
 * @param chunk The data chunk as a Uint8Array
 * @param qubitCount Number of qubits in the circuit
 * @returns Circom input JSON
 */
export function generateCircomInput(chunk: Uint8Array, qubitCount: number = 4): any {
  // Create a quantum circuit
  const circuit = new quantum.QuantumCircuit(qubitCount);
  
  // Get the Hadamard gate from the gate cache
  const hGate = circuit['gateCache'].get('H') ?? [];
  
  // Apply gates based on the input data
  for (let i = 0; i < Math.min(qubitCount, chunk.length); i++) {
    // Use the byte value to determine which qubit to apply the gate to
    const qubitIndex = chunk[i] % qubitCount;
    
    // Apply Hadamard gate
    circuit.applySingleQubitGate(qubitIndex, hGate);
    
    // If the byte value is above a threshold, also apply a phase gate
    if (chunk[i] > 128) {
      const phaseGate = circuit['gateCache'].get('P') ?? [];
      circuit.applySingleQubitGate(qubitIndex, phaseGate);
    }
  }
  
  // Generate Circom input
  const inputJson = circuit.toCircomInput();
  
  return inputJson;
}

/**
 * Generate a ZKP circuit and proof from a data chunk
 * @param chunk The data chunk as a Uint8Array
 * @param chunkId A unique identifier for the chunk
 * @returns The circuit, Circom input, and proof
 */
export async function generateZKPCircuit(chunk: Uint8Array, chunkId: string): Promise<{
  circuit: any;
  circomInput: any;
  proof: any;
}> {
  // Create a quantum circuit
  const qubitCount = 4;
  const circuit = new quantum.QuantumCircuit(qubitCount);
  
  // Get the Hadamard gate from the gate cache
  const hGate = circuit['gateCache'].get('H') ?? [];
  
  // Apply Hadamard gate to the first qubit
  circuit.applySingleQubitGate(1, hGate);
  
  // Apply additional gates based on the input data
  for (let i = 0; i < Math.min(qubitCount, chunk.length); i++) {
    // Use the byte value to determine which qubit to apply the gate to
    const qubitIndex = chunk[i] % qubitCount;
    
    // Skip if it's the first qubit (already has Hadamard)
    if (qubitIndex === 1) continue;
    
    // Apply gates based on the byte value
    if (chunk[i] < 85) {
      // Apply X gate for low values
      const xGate = circuit['gateCache'].get('X') ?? [];
      circuit.applySingleQubitGate(qubitIndex, xGate);
    } else if (chunk[i] < 170) {
      // Apply Z gate for medium values
      const zGate = circuit['gateCache'].get('Z') ?? [];
      circuit.applySingleQubitGate(qubitIndex, zGate);
    } else {
      // Apply Y gate for high values
      const yGate = circuit['gateCache'].get('Y') ?? [];
      circuit.applySingleQubitGate(qubitIndex, yGate);
    }
  }
  
  // Generate Circom input
  const circomInput = circuit.toCircomInput();
  
  // Create a proof using the circuit state
  const state = circuit.getState();
  const stateVector = state.getStateVector();
  
  // Convert complex state vector to real numbers for the proof
  const realVector = stateVector.map(c => {
    const complex = c as any;
    return complex.re || 0;
  });
  
  // Create QZKP instance and generate proof
  const qzkp = new quantum.QuantumZKP(realVector.length);
  const proof = qzkp.proveVectorKnowledge(realVector, chunkId);
  
  return {
    circuit,
    circomInput,
    proof
  };
}

/**
 * Verify a ZKP circuit proof
 * @param circomInput The Circom input
 * @param proof The proof to verify
 * @returns Whether the proof is valid
 */
export async function verifyZKPCircuit(circomInput: any, proof: any): Promise<boolean> {
  // In a real implementation, this would use snarkjs or a similar library
  // to verify the proof against the Circom input
  
  // For now, we'll just check if the proof has the expected structure
  return (
    proof &&
    typeof proof.commitment === 'string' &&
    typeof proof.coherence === 'number' &&
    typeof proof.entanglement === 'number'
  );
}

/**
 * Generate a complete ZKP pipeline result
 * @param chunk The data chunk as a Uint8Array
 * @param chunkId A unique identifier for the chunk
 * @returns The complete ZKP pipeline result
 */
export async function runZKPPipeline(chunk: Uint8Array, chunkId: string): Promise<{
  circuit: any;
  circomInput: any;
  proof: any;
  valid: boolean;
}> {
  // Generate the ZKP circuit and proof
  const { circuit, circomInput, proof } = await generateZKPCircuit(chunk, chunkId);
  
  // Verify the proof
  const valid = await verifyZKPCircuit(circomInput, proof);
  
  return {
    circuit,
    circomInput,
    proof,
    valid
  };
}