Mobile Device (WASM):
  1. User types character "H"
  2. Generate LSEQ position (fast: <1ms)
  3. Kyber encapsulation (fast: <2ms)
  4. AES encryption of content (fast: <1ms)
  5. Send to server: {position, kyber_ct, encrypted_content}
  6. Wait for response (~50-100ms network)
  7. Receive: {proof, merged_document_state}
  8. Verify proof locally (fast: <16ms)
  9. Render to user

Server (Rust):
  1. Receive operation from mobile
  2. M²-ORE encrypt position (deterministic, no proof yet)
  3. Validate Lamport clock, LSEQ constraints
  4. Halo2 proof generation (1.2ms)
  5. Dilithium signature (fast: <5ms)
  6. Merge into document
  7. Return: {proof, merged_state}
  8. Send to other clients

Other Mobile Clients:
  1. Receive operation + proof
  2. Verify proof (fast: <16ms)
  3. M²-ORE comparison (deterministic)
  4. Decrypt content if authorized
  5. Apply CRDT merge
  6. Render

pub struct ProofService {
    cache: HashMap<String, ProofResult>,
    prover: Halo2Prover,
}

impl ProofService {
    pub async fn generate_insert_proof(
        &self,
        witness: InsertWitness,
        public_input: PublicInput,
    ) -> Result<(InsertProof, u128)> {
        // Check cache first
        let cache_key = format!("{:?}", public_input);
        if let Some(cached) = self.cache.get(&cache_key) {
            return Ok((cached.proof.clone(), cached.time_ms));
        }

        // Generate proof
        let start = Instant::now();
        let proof = self.prover.prove_insert(witness, public_input)?;
        let time_ms = start.elapsed().as_millis();

        // Cache for 5 minutes
        self.cache.insert(cache_key, ProofResult {
            proof: proof.clone(),
            time_ms,
            timestamp: SystemTime::now(),
        });

        Ok((proof, time_ms))
    }
}

// REST API
POST /verify/insert
Request: {
    lseq_position: [encrypted_digits],
    kyber_ciphertext: bytes,
    content_ciphertext: bytes,
    lamport_clock: u32,
    replica_id: u32
}
Response: {
    halo2_proof: bytes (514),
    merged_document: DocumentState,
    time_ms: 1.2
}

#[wasm_bindgen]
pub struct WasmProofVerifier {
    verifier: Halo2Verifier,
}

#[wasm_bindgen]
impl WasmProofVerifier {
    #[wasm_bindgen(constructor)]
    pub fn new() -> WasmProofVerifier {
        WasmProofVerifier {
            verifier: Halo2Verifier::new(),
        }
    }

    #[wasm_bindgen]
    pub fn verify_insert_proof(
        &self,
        proof_bytes: &[u8],
        public_input: &[u8],
    ) -> Result<bool> {
        let proof = InsertProof::from_bytes(proof_bytes)?;
        let public = PublicInput::from_bytes(public_input)?;

        // Fast verification: <16ms
        Ok(self.verifier.verify(&proof, &public)?)
    }

    #[wasm_bindgen]
    pub fn verify_delete_proof(
        &self,
        proof_bytes: &[u8],
        public_input: &[u8],
    ) -> Result<bool> {
        // Similar to insert
        Ok(self.verifier.verify_delete(proof_bytes, public_input)?)
    }
}

// JavaScript interface
export async function verifyProof(proof, publicInput) {
    const verifier = new WasmProofVerifier();
    return verifier.verify_insert_proof(
        new Uint8Array(proof),
        new Uint8Array(publicInput)
    );
}