qualia_core_db/specialized_libs/qpu_bridge/
connection.rs

1//! QPU Bridge - Quantum Processing Unit Bridge for Exact Quantum Computing
2//!
3//! This module provides a bridge to remote quantum computing resources (IBM Quantum API)
4//! via the NativeQuantumDft module, enabling exact Hamiltonian mapping and quantum
5//! calculations that cannot be approximated on classical hardware.
6//!
7//! Architecture:
8//! - Time-metered proxy for IBM Quantum API
9//! - Job submission and result retrieval
10//! - Authentication and rate limiting
11//! - Error handling and fallback mechanisms
12
13use crate::fiduciary_crypto::FiduciaryCrypto;
14use core::ptr;
15use core::sync::atomic::Ordering;
16
17/// QPU Bridge Manager - Main interface for quantum computing operations
18///
19/// This struct manages connections to remote quantum computing resources while
20/// maintaining strict zero-allocation invariants and security requirements.
21use super::*;
22
23#[repr(C)]
24pub struct QPUBridgeManager {
25    /// Connection state and configuration
26    pub(crate) connection_state: QPUConnectionState,
27    /// Authentication and security
28    pub(crate) auth_manager: QPUAuthManager,
29    /// Job queue and management
30    pub(crate) job_manager: QPUJobManager,
31    /// Rate limiting and quotas
32    pub(crate) rate_limiter: QPURateLimiter,
33    /// Performance metrics
34    pub(crate) metrics: QPUMetrics,
35}
36
37#[repr(C)]
38#[derive(Clone, Copy)]
39pub struct QPUConnectionState {
40    /// Current connection status
41    pub(crate) status: QPUConnectionStatus,
42    /// Last connection timestamp
43    pub(crate) last_connection: u64,
44    /// Retry count
45    pub(crate) retry_count: u8,
46    /// Connection timeout (seconds)
47    pub(crate) timeout_seconds: u32,
48}
49
50#[repr(u8)]
51#[derive(Clone, Copy, PartialEq)]
52pub enum QPUConnectionStatus {
53    Disconnected = 0,
54    Connecting = 1,
55    Connected = 2,
56    Authenticating = 3,
57    Ready = 4,
58    Error = 5,
59    RateLimited = 6,
60}
61
62#[repr(C)]
63pub struct QPUAuthManager {
64    /// Authentication token hash
65    pub(crate) auth_hash: [u8; 32],
66    /// API endpoint configuration
67    pub(crate) api_config: QPUAPIConfig,
68    /// Cryptographic context
69    pub(crate) crypto_context: FiduciaryCrypto,
70    /// Authentication state
71    pub(crate) auth_state: QPUAuthState,
72}
73
74#[repr(C)]
75#[derive(Clone, Copy)]
76pub struct QPUAPIConfig {
77    /// IBM Quantum API endpoint
78    pub(crate) endpoint: [u8; 256],
79    /// API version
80    pub(crate) version: u16,
81    /// Timeout in seconds
82    pub(crate) timeout: u32,
83    /// Maximum retries
84    pub(crate) max_retries: u8,
85}
86
87#[repr(u8)]
88#[derive(Clone, Copy, PartialEq)]
89pub enum QPUAuthState {
90    Unauthenticated = 0,
91    Pending = 1,
92    Authenticated = 2,
93    Expired = 3,
94    Revoked = 4,
95}
96
97impl QPUBridgeManager {
98    /// Create new QPU bridge manager with zero allocation
99    #[inline(always)]
100    pub fn new() -> Self {
101        Self {
102            connection_state: QPUConnectionState::default(),
103            auth_manager: QPUAuthManager::default(),
104            job_manager: QPUJobManager::default(),
105            rate_limiter: QPURateLimiter::default(),
106            metrics: QPUMetrics::new(),
107        }
108    }
109
110    /// Initialize QPU bridge with API configuration
111    pub fn initialize(
112        &mut self,
113        api_endpoint: &[u8],
114        auth_token: &[u8],
115    ) -> Result<(), QPUBridgeError> {
116        // Validate inputs
117        if api_endpoint.len() > 256 || auth_token.len() > 256 {
118            return Err(QPUBridgeError::InvalidConfiguration);
119        }
120
121        // Initialize authentication manager
122        self.auth_manager.initialize(api_endpoint, auth_token)?;
123
124        // Initialize connection state
125        self.connection_state = QPUConnectionState {
126            status: QPUConnectionStatus::Disconnected,
127            last_connection: 0,
128            retry_count: 0,
129            timeout_seconds: 30,
130        };
131
132        // Initialize rate limiter
133        self.rate_limiter = QPURateLimiter {
134            jobs_per_second: 10, // Conservative rate limit
135            current_jobs: 0,
136            window_start: 0,
137            window_duration: 1,
138            quota_remaining: 1000, // Daily quota
139        };
140
141        Ok(())
142    }
143
144    /// Connect to QPU service
145    pub fn connect(&mut self) -> Result<(), QPUBridgeError> {
146        if self.connection_state.status != QPUConnectionStatus::Disconnected {
147            return Err(QPUBridgeError::AlreadyConnected);
148        }
149
150        // Set connection state to connecting
151        self.connection_state.status = QPUConnectionStatus::Connecting;
152        self.connection_state.last_connection = self.get_timestamp();
153
154        // Authenticate with API
155        self.connection_state.status = QPUConnectionStatus::Authenticating;
156        match self.auth_manager.authenticate() {
157            Ok(_) => {
158                self.connection_state.status = QPUConnectionStatus::Connected;
159                self.connection_state.retry_count = 0;
160                Ok(())
161            }
162            Err(e) => {
163                self.connection_state.status = QPUConnectionStatus::Error;
164                Err(e)
165            }
166        }
167    }
168
169    /// Submit quantum job to QPU
170    pub fn submit_job(
171        &mut self,
172        params: QPUJobSubmissionParams,
173    ) -> Result<[u8; 64], QPUBridgeError> {
174        // Check connection state
175        if self.connection_state.status != QPUConnectionStatus::Connected
176            && self.connection_state.status != QPUConnectionStatus::Ready
177        {
178            return Err(QPUBridgeError::NotConnected);
179        }
180
181        // Check rate limiting
182        if !self.rate_limiter.can_submit_job(self.get_timestamp()) {
183            return Err(QPUBridgeError::RateLimited);
184        }
185
186        // Find available job slot
187        let job_id = self.job_manager.allocate_job_slot()?;
188
189        // Create job structure
190        let job = QPUJob {
191            job_id,
192            job_type: params.job_type,
193            priority: params.priority,
194            submitted_at: self.get_timestamp(),
195            expected_completion: self.get_timestamp() + (params.timeout as u64 * 1_000_000),
196            status: QPUJobStatus::Queued,
197            result_data: ptr::null(),
198            result_size: 0,
199        };
200
201        // Submit job to quantum service
202        match self.submit_quantum_job(&job, params) {
203            Ok(_) => {
204                // Update job manager
205                self.job_manager.add_active_job(job);
206                self.job_manager.job_counters.total_submitted += 1;
207
208                // Update metrics
209                self.metrics
210                    .total_operations
211                    .fetch_add(1, Ordering::Relaxed);
212
213                // Update rate limiter
214                self.rate_limiter
215                    .record_job_submission(self.get_timestamp());
216
217                Ok(job_id)
218            }
219            Err(e) => {
220                // Release job slot
221                self.job_manager.release_job_slot(job_id);
222                Err(e)
223            }
224        }
225    }
226
227    /// Retrieve job result from QPU
228    pub fn get_job_result(&mut self, job_id: &[u8; 64]) -> Result<QPUJobResult, QPUBridgeError> {
229        // Find job in active queue
230        let job_index = self.job_manager.find_active_job(job_id)?;
231        let job = &self.job_manager.active_jobs[job_index];
232
233        // Check job status
234        match job.status {
235            QPUJobStatus::Completed => {
236                // Retrieve result from quantum service
237                let result = self.retrieve_quantum_result(job_id)?;
238
239                // Move job to completed queue
240                self.job_manager.move_to_completed(job_index);
241                self.job_manager.job_counters.total_completed += 1;
242
243                // Update metrics
244                let execution_time = result.execution_time_us;
245                self.metrics
246                    .successful_operations
247                    .fetch_add(1, Ordering::Relaxed);
248                self.metrics
249                    .total_quantum_time_us
250                    .fetch_add(execution_time, Ordering::Relaxed);
251
252                Ok(result)
253            }
254            QPUJobStatus::Failed => {
255                // Move job to completed queue
256                self.job_manager.move_to_completed(job_index);
257                self.job_manager.job_counters.total_failed += 1;
258
259                // Update metrics
260                self.metrics
261                    .failed_operations
262                    .fetch_add(1, Ordering::Relaxed);
263
264                Err(QPUBridgeError::JobFailed)
265            }
266            QPUJobStatus::Timeout => {
267                // Move job to completed queue
268                self.job_manager.move_to_completed(job_index);
269                self.job_manager.job_counters.total_failed += 1;
270
271                Err(QPUBridgeError::JobTimeout)
272            }
273            _ => {
274                // Job still running or queued
275                Err(QPUBridgeError::JobNotCompleted)
276            }
277        }
278    }
279
280    /// Submit quantum job to remote service
281    fn submit_quantum_job(
282        &self,
283        job: &QPUJob,
284        params: QPUJobSubmissionParams,
285    ) -> Result<(), QPUBridgeError> {
286        // Prepare quantum circuit parameters based on job type
287        let circuit_params = match job.job_type {
288            QPUJobType::HamiltonianMapping => self.prepare_hamiltonian_circuit(params)?,
289            QPUJobType::QuantumStatePreparation => {
290                self.prepare_state_preparation_circuit(params)?
291            }
292            QPUJobType::QuantumMeasurement => self.prepare_measurement_circuit(params)?,
293            QPUJobType::QuantumCircuitExecution => self.prepare_circuit_execution(params)?,
294            QPUJobType::VariationalQuantumEigensolver => self.prepare_vqe_circuit(params)?,
295            QPUJobType::QuantumApproximateOptimization => self.prepare_qaoa_circuit(params)?,
296        };
297
298        // Submit to IBM Quantum API via NativeQuantumDft
299        unsafe {
300            match self.submit_to_native_quantum_dft(&job.job_id, &circuit_params) {
301                Ok(_) => Ok(()),
302                Err(e) => Err(e),
303            }
304        }
305    }
306
307    /// Retrieve quantum result from remote service
308    fn retrieve_quantum_result(&self, job_id: &[u8; 64]) -> Result<QPUJobResult, QPUBridgeError> {
309        unsafe {
310            match self.get_result_from_native_quantum_dft(job_id) {
311                Ok(result) => Ok(result),
312                Err(e) => Err(e),
313            }
314        }
315    }
316
317    /// Submit job to NativeQuantumDft module (unsafe)
318    unsafe fn submit_to_native_quantum_dft(
319        &self,
320        job_id: &[u8; 64],
321        circuit_params: &QuantumCircuitParams,
322    ) -> Result<(), QPUBridgeError> {
323        // This would integrate with the NativeQuantumDft module
324        // For now, simulate successful submission
325
326        // Create quantum circuit
327        let circuit = QuantumCircuit::from_params(circuit_params)?;
328
329        // Submit to IBM Quantum API
330        match self.submit_to_ibm_quantum(job_id, &circuit) {
331            Ok(_) => Ok(()),
332            Err(e) => Err(e),
333        }
334    }
335
336    /// Retrieve result from NativeQuantumDft module (unsafe)
337    unsafe fn get_result_from_native_quantum_dft(
338        &self,
339        job_id: &[u8; 64],
340    ) -> Result<QPUJobResult, QPUBridgeError> {
341        // This would integrate with the NativeQuantumDft module
342        // For now, simulate successful result
343
344        let result = QPUJobResult {
345            job_id: *job_id,
346            success: true,
347            result_data: ptr::null(), // Would point to actual result data
348            result_size: 1024,
349            execution_time_us: 1000000, // 1 second
350            quantum_volume: 100,
351            error_code: QPUErrorCode::Success,
352        };
353
354        Ok(result)
355    }
356
357    /// Submit to IBM Quantum API
358    fn submit_to_ibm_quantum(
359        &self,
360        _job_id: &[u8; 64],
361        circuit: &QuantumCircuit,
362    ) -> Result<(), QPUBridgeError> {
363        // This would make actual HTTP request to IBM Quantum API
364        // For now, simulate success
365
366        // Create authentication header
367        let _auth_header = self.auth_manager.create_auth_header()?;
368
369        // Serialize quantum circuit
370        let _circuit_json = self.serialize_circuit(circuit)?;
371
372        // Submit job
373        // In production, this would be an HTTP POST request
374        // For now, simulate success
375
376        Ok(())
377    }
378
379    /// Prepare Hamiltonian mapping circuit parameters
380    fn prepare_hamiltonian_circuit(
381        &self,
382        params: QPUJobSubmissionParams,
383    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
384        if params.input_size < 64 {
385            return Err(QPUBridgeError::InvalidInput);
386        }
387
388        unsafe {
389            let input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
390
391            // Extract Hamiltonian matrix from input
392            let matrix_size =
393                u32::from_le_bytes([input_data[0], input_data[1], input_data[2], input_data[3]]);
394
395            // Validate matrix size
396            if matrix_size > 20 || matrix_size == 0 {
397                return Err(QPUBridgeError::InvalidInput);
398            }
399
400            let circuit_params = QuantumCircuitParams {
401                circuit_type: QuantumCircuitType::Hamiltonian,
402                num_qubits: matrix_size,
403                depth: 100, // Approximate depth for Hamiltonian simulation
404                parameters: [0.0; 64],
405            };
406
407            Ok(circuit_params)
408        }
409    }
410
411    /// Prepare quantum state preparation circuit parameters
412    fn prepare_state_preparation_circuit(
413        &self,
414        params: QPUJobSubmissionParams,
415    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
416        unsafe {
417            let _input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
418
419            // Extract state vector from input
420            let num_qubits = (params.input_size / 8) as u32;
421
422            if num_qubits > 20 || num_qubits == 0 {
423                return Err(QPUBridgeError::InvalidInput);
424            }
425
426            let circuit_params = QuantumCircuitParams {
427                circuit_type: QuantumCircuitType::StatePreparation,
428                num_qubits,
429                depth: 50, // Approximate depth for state preparation
430                parameters: [0.0; 64],
431            };
432
433            Ok(circuit_params)
434        }
435    }
436
437    /// Prepare measurement circuit parameters
438    fn prepare_measurement_circuit(
439        &self,
440        params: QPUJobSubmissionParams,
441    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
442        unsafe {
443            let _input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
444
445            // Extract measurement basis from input
446            let num_qubits = (params.input_size / 4) as u32;
447
448            if num_qubits > 20 || num_qubits == 0 {
449                return Err(QPUBridgeError::InvalidInput);
450            }
451
452            let circuit_params = QuantumCircuitParams {
453                circuit_type: QuantumCircuitType::Measurement,
454                num_qubits,
455                depth: 10, // Shallow circuit for measurement
456                parameters: [0.0; 64],
457            };
458
459            Ok(circuit_params)
460        }
461    }
462
463    /// Prepare circuit execution parameters
464    fn prepare_circuit_execution(
465        &self,
466        params: QPUJobSubmissionParams,
467    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
468        unsafe {
469            let input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
470
471            // Extract circuit specification from input
472            let num_qubits =
473                u32::from_le_bytes([input_data[0], input_data[1], input_data[2], input_data[3]]);
474            let depth =
475                u32::from_le_bytes([input_data[4], input_data[5], input_data[6], input_data[7]]);
476
477            if num_qubits > 20 || depth > 1000 {
478                return Err(QPUBridgeError::InvalidInput);
479            }
480
481            let circuit_params = QuantumCircuitParams {
482                circuit_type: QuantumCircuitType::General,
483                num_qubits,
484                depth,
485                parameters: [0.0; 64],
486            };
487
488            Ok(circuit_params)
489        }
490    }
491
492    /// Prepare VQE circuit parameters
493    fn prepare_vqe_circuit(
494        &self,
495        params: QPUJobSubmissionParams,
496    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
497        unsafe {
498            let input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
499
500            // Extract VQE parameters
501            let num_qubits =
502                u32::from_le_bytes([input_data[0], input_data[1], input_data[2], input_data[3]]);
503            let num_layers =
504                u32::from_le_bytes([input_data[4], input_data[5], input_data[6], input_data[7]]);
505
506            if num_qubits > 20 || num_layers > 100 {
507                return Err(QPUBridgeError::InvalidInput);
508            }
509
510            let circuit_params = QuantumCircuitParams {
511                circuit_type: QuantumCircuitType::VQE,
512                num_qubits,
513                depth: num_layers * 10, // Approximate depth
514                parameters: [0.0; 64],
515            };
516
517            Ok(circuit_params)
518        }
519    }
520
521    /// Prepare QAOA circuit parameters
522    fn prepare_qaoa_circuit(
523        &self,
524        params: QPUJobSubmissionParams,
525    ) -> Result<QuantumCircuitParams, QPUBridgeError> {
526        unsafe {
527            let input_data = core::slice::from_raw_parts(params.input_data, params.input_size);
528
529            // Extract QAOA parameters
530            let num_qubits =
531                u32::from_le_bytes([input_data[0], input_data[1], input_data[2], input_data[3]]);
532            let num_layers =
533                u32::from_le_bytes([input_data[4], input_data[5], input_data[6], input_data[7]]);
534
535            if num_qubits > 20 || num_layers > 50 {
536                return Err(QPUBridgeError::InvalidInput);
537            }
538
539            let circuit_params = QuantumCircuitParams {
540                circuit_type: QuantumCircuitType::QAOA,
541                num_qubits,
542                depth: num_layers * 2, // QAOA depth is 2 * layers
543                parameters: [0.0; 64],
544            };
545
546            Ok(circuit_params)
547        }
548    }
549
550    /// Serialize quantum circuit to JSON
551    fn serialize_circuit(&self, _circuit: &QuantumCircuit) -> Result<[u8; 1024], QPUBridgeError> {
552        // This would serialize the quantum circuit to JSON format
553        // For now, return a placeholder
554        let mut json_buffer = [0u8; 1024];
555
556        // In production, this would create proper JSON
557        let json_str = b"{\"backend\":\"ibmq_qasm_simulator\",\"shots\":1000}";
558        let copy_len = core::cmp::min(json_str.len(), 1024);
559        json_buffer[..copy_len].copy_from_slice(&json_str[..copy_len]);
560
561        Ok(json_buffer)
562    }
563
564    /// Get current timestamp in microseconds
565    fn get_timestamp(&self) -> u64 {
566        // Platform-specific timestamp implementation
567        // For now, return a placeholder
568        0
569    }
570
571    /// Get performance metrics
572    pub fn get_metrics(&self) -> &QPUMetrics {
573        &self.metrics
574    }
575
576    /// Check connection status
577    pub fn is_connected(&self) -> bool {
578        matches!(
579            self.connection_state.status,
580            QPUConnectionStatus::Connected | QPUConnectionStatus::Ready
581        )
582    }
583
584    /// Get job queue status
585    pub fn get_job_status(&self) -> QPUJobStatus {
586        self.job_manager.submission_state.into()
587    }
588}
589
590impl QPUConnectionState {
591    #[inline(always)]
592    pub const fn default() -> Self {
593        Self {
594            status: QPUConnectionStatus::Disconnected,
595            last_connection: 0,
596            retry_count: 0,
597            timeout_seconds: 30,
598        }
599    }
600}
601
602impl QPUAuthManager {
603    #[inline(always)]
604    pub fn default() -> Self {
605        Self {
606            auth_hash: [0u8; 32],
607            api_config: QPUAPIConfig::default(),
608            crypto_context: FiduciaryCrypto::new(),
609            auth_state: QPUAuthState::Unauthenticated,
610        }
611    }
612
613    pub fn initialize(
614        &mut self,
615        api_endpoint: &[u8],
616        auth_token: &[u8],
617    ) -> Result<(), QPUBridgeError> {
618        // Copy API endpoint
619        let mut endpoint_array = [0u8; 256];
620        let copy_len = core::cmp::min(api_endpoint.len(), 256);
621        endpoint_array[..copy_len].copy_from_slice(&api_endpoint[..copy_len]);
622
623        self.api_config = QPUAPIConfig {
624            endpoint: endpoint_array,
625            version: 1,
626            timeout: 30,
627            max_retries: 3,
628        };
629
630        // Hash authentication token
631        self.auth_hash = self
632            .crypto_context
633            .hash_token(auth_token)
634            .map_err(|_| QPUBridgeError::AuthenticationFailed)?;
635
636        Ok(())
637    }
638
639    pub fn authenticate(&mut self) -> Result<(), QPUBridgeError> {
640        // This would perform actual authentication
641        // For now, simulate success
642        self.auth_state = QPUAuthState::Authenticated;
643        Ok(())
644    }
645
646    pub fn create_auth_header(&self) -> Result<[u8; 256], QPUBridgeError> {
647        // This would create proper authentication header
648        // For now, return placeholder
649        Ok([0u8; 256])
650    }
651}
652
653impl QPUAPIConfig {
654    #[inline(always)]
655    pub const fn default() -> Self {
656        Self {
657            endpoint: [0u8; 256],
658            version: 1,
659            timeout: 30,
660            max_retries: 3,
661        }
662    }
663}
qualia_core_db/specialized_libs/qpu_bridge/connection.rs

qualia_core_db/specialized_libs/qpu_bridge/
connection.rs
