cleanup: remove obsolete files
This commit is contained in:
nicolas
parent
40d734b146
commit
9863dc182b
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@ -14,3 +14,4 @@ build/
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triangular_arb.egg-info/
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triangular_arb.egg-info/
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session
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session
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AGENTS.md
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AGENTS.md
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docs/gateio-port-plan.md
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@ -1,41 +0,0 @@
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# Code Audit — 2026-05-28
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Verified against: commit 728f416 (evaluate.c paper-trade simulation) + all other files.
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---
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## A. Evaluate vs Executor Cascade (Paper Mode)
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These compare the paper-mode simulation in evaluate.c against the paper-mode simulation in executor.c. They must produce identical results for identical inputs.
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| ID | Status | Files | Lines | Description |
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|----|--------|-------|-------|-------------|
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| A1 | FIXED | evaluate.c:320, executor.c:176 | 320, 176 | Pre-fill `apply_fee_hold` on legs 1-2. Both now have it — matches. |
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| A2 | FIXED | evaluate.c:359, executor.c:348 | 359, 348 | Input `apply_fee_hold` removed from legs 1-2. Fee hold now applied only once per leg, at end-of-leg cascade. |
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| A3 | FIXED | evaluate.c:334-335, executor.c:267-268 | 334,267 | Buy `total_funds` rounding: both now use `sl->quote_increment` — matches. |
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| A4 | FIXED | evaluate.c:354-356, executor.c:293-295 | 354,293 | Fee formula: both now use `output_amt * fee_rate` — matches. |
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| A5/A8 | FIXED | evaluate.c:278-281 | 278, 281 | Sell `order_param` now uses `base` (base amount) instead of `quote_volume`. Fixes the dimension mismatch for sell-first triangles. Both sides consistent. |
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## B. Other Bugs and Logic Errors
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| ID | Status | File | Lines | Description |
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|----|--------|------|-------|-------------|
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| B1 | ACTIVE | symbols_api.c | 214-215 | `discover_symbols()` accepts `fees` and `fee_count` parameters (from the parsed `/api/v1/base-fee` response) but never dereferences them. Fee rates are computed from `fee_category * 0.001 * taker_fee_coeff` instead. The fetched fee table is silently discarded. |
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| B2 | MINOR | config.c | 82 | `stats_interval_seconds` is parsed but never read. Status interval is hardcoded to 30000ms in evaluate.c. |
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| B3 | MINOR | config.h | 37 | `executor_socket_path` declared, never written, never read. |
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| B4 | FIXED | ws_client.c | 882 | `MAX_DIRTY_BATCH` raised from 64 to 2048. |
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| B5 | FIXED | symbols_api.c | 390-403 | Failed symbol lookups logged per-failure, triangle marked invalid via `UINT16_MAX`. Evaluate skips invalid triangles. |
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| B6 | FIXED | rest_client.c | 82-84 | SSL health check removed (blocked on idle connections). Dead connections handled naturally by `do_signed_request`. |
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| B7 | FALSE | rest_client.c | 211-247 | `SSL_ERROR_WANT_READ` is handled correctly with `continue`. Break only triggers when `total >= need`. No truncation possible. |
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| B8 | MINOR | executor.c | 153 | Correlation ID truncates `uintptr_t` to `unsigned` — collisions possible on 64-bit. |
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| B9 | ACTIVE | executor.c | 471 | `sh->count--` has no bounds check. Under concurrent execution with in_flight slot logic errors, can underflow to `UINT_MAX`. |
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| B10 | MINOR | ws_client.c | 544 | `conn->state = WS_STATE_CONNECTED` even on subscribe failure (return -1). Reconnect loop checks `WS_STATE_DISCONNECTED`, so a failed subscribe leaves the connection in a broken CONNECTED state. |
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| D4 | ACTIVE | fill_handler.c | 67-76 | SPSC `fill_channel_pop` is designed for single-consumer but called from multiple executor threads concurrently (via `fill_channel_await`). Data race on the ring buffer: two threads can read the same slot, or one thread can advance `head` past a slot the other is about to read. |
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## Summary
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| Category | Count |
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|----------|-------|
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| Active bugs | none |
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| Minor/dead config (B2, B3, B8, B10) | 4 |
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| Fixed in this session | A1-A8 (all cascade), B1, B4-B6, B9, D4 |
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@ -1,386 +0,0 @@
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# Executor Migration Plan
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Absorb all executor functions into the fused_engine process, eliminating
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Python, UDS, JSON serialisation, and the 2+ ms pipeline gap between signal
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creation and first order fire.
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## Architecture
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```
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┌───────────────────────────────────────────┐
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│ HOT THREAD │
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│ epoll WS → book updates → evaluate → │
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│ spsc_push(main_queue, &signal) │
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│ eventfd_write(wake_fd) │
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│ │
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│ on WS match event (orderChange): │
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│ exec_id = lookup[client_oid] │
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│ spsc_push(fill_queue[exec_id], match) │
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│ eventfd_write(fill_wake[exec_id]) │
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└──────┬─────────────────────────┬──────────┘
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│ │
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main_queue fill_queue[0..N-1]
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(signal_entry_t SPSC) (per-thread SPSC)
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│ │
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┌──────────▼────────┐ ┌──────────▼─────────┐
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│ EXECUTOR THREAD │ │ fill_match_t ring │
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│ (1 per slot) │◄────│ pushed by hot t │
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│ spsc_pop(main) │ └────────────────────┘
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│ execute(sig) │
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│ for each leg: │
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│ rest POST │
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│ wait_for_fill │
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│ cascade │
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│ emit report │
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└───────────────────┘
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```
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**Thread roles:**
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- **HOT**: epoll on WS fds + timer. Evaluates triangles, pushes signals to
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SPSC. Also receives WS orderChange events and dispatches match data to the
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correct executor thread's fill SPSC.
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- **EXECUTOR**: pops from main signal queue, executes triangle via
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blocking REST POST + fill wait, cascades to next leg. One thread per
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concurrent slot.
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- No Python, no UDS socket, no JSON serialisation between threads.
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## What Exists in C Already
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| Component | File | Status |
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|-----------|------|--------|
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| WS connection + reconnection | `ws_client.c` | Done |
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| SSL context + BIO | `ws_client.c` | Done |
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| Timer fd | `events.c` | Done |
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| SPSC queue | `queue.c` | Done |
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| JSON parser (cJSON) | `cJSON.c` | Done |
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| Book data structures | `book.h` | Done |
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| Triangle evaluation + sizing | `evaluate.c` | Done |
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| Non-blocking log pipe | `log.c` | Done |
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| Config parser | `config.c` | Done |
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| HMAC-SHA256 | OpenSSL `HMAC()` in libcrypto | Already linked |
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| Base64 | OpenSSL `BIO_f_base64()` in libcrypto | Already linked |
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## What Needs to Be Written
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### Phase 1 — HTTP Client + REST Signing
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**New files:** `http_client.c`, `http_client.h`
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- Reuse `SSL_CTX` from WS client (or create a minimal second context)
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- `http_post(url, body, headers) → (status, response_body)`
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- `http_get(url, headers) → (status, response_body)`
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- Connection pool: keep-alive via socket reuse (same pattern as WS reconnect
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but for REST endpoints)
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- DNS resolution: reuse `getaddrinfo` from `ws_client.c`
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- `kucoin_sign(timestamp, method, path, body, secret) → signature_base64`
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- `kucoin_headers(api_key, encrypted_passphrase, sign, timestamp) → header_string`
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**Dependencies:** OpenSSL libcrypto (already linked for HMAC), cJSON for
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parsing responses.
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### Phase 2 — Fill Handler
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**New files:** `fill_handler.c`, `fill_handler.h`
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**Data structures:**
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```c
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typedef struct {
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char client_oid[41]; // max 40 chars per KuCoin
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double match_size;
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double match_price;
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bool is_terminal; // canceled+done = complete
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} fill_match_t;
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typedef struct {
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char client_oid[41];
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char order_id[32];
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double total_size;
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double total_funds;
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int match_count;
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bool done; // terminal event received
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} accumulator_t;
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// Ring of fill SPSCs — one per executor thread
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typedef struct {
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spsc_queue_t queue; // fill_match_t ring
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int wake_fd; // eventfd for waking executor
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accumulator_t acc; // in-progress accumulation (hot thread writes)
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atomic_bool registered; // register_fill_listener / unregister
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} fill_channel_t;
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```
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**Fill dispatch (hot thread side):**
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```c
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// Called from hot thread's ws_client.c when a match event arrives
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void fill_dispatch_match(const char *client_oid,
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double match_size, double match_price);
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// Called from hot thread on canceled/filled terminal event
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void fill_dispatch_terminal(const char *client_oid);
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```
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- `client_oid → executor_thread` lookup via hash table (hot thread use,
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atomically updated)
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- Each `fill_dispatch_match` pushes a `fill_match_t` to the correct executor
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thread's SPSC + eventfd write
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**Fill waiter (executor thread side):**
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```c
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// Accumulates matches for a single client_oid until terminal or timeout
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typedef struct {
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double total_size;
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double total_funds;
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double avg_price;
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int match_count;
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char order_id[32];
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} fill_result_t;
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bool await_fill(fill_channel_t *ch, const char *client_oid,
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int64_t timeout_ms, fill_result_t *out);
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```
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- Drains `fill_match_t` from the thread's fill SPSC
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- Accumulates `total_size += match_size`, `total_funds += match_price * match_size`
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- Returns on terminal event or timeout
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- `poll()` on the fill eventfd between drain cycles
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### Phase 3 — Execution Engine
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Executor thread main loop (`events.c`, replacing current cold thread):
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```c
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void *executor_thread(void *arg) {
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thread_data_t *td = (thread_data_t *)arg;
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while (atomic_load(&g_running)) {
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signal_entry_t sig;
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if (spsc_pop(td->main_queue, &sig)) {
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execute_triangle(&sig, td);
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continue;
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}
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// sleep via poll on fill eventfd + shutdown fd
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struct pollfd fds[2] = {
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{ .fd = td->fill_channel.wake_fd, .events = POLLIN },
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};
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poll(fds, 1, -1);
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uint64_t val; read(td->fill_channel.wake_fd, &val, sizeof(val));
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}
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return NULL;
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}
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```
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**`execute_triangle()` in C** mirrors the current `_execute_triangle`:
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```c
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void execute_triangle(signal_entry_t *sig, thread_data_t *td) {
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setup_timings(sig, timings);
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double leg_output[3] = {0};
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for (int leg = 0; leg < 3; leg++) {
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// ── Input volume ──
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double input_vol = (leg == 0) ? sig->starting_volume : leg_output[leg-1];
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apply_fee_hold_reduction(sig, leg, &input_vol);
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apply_increment_floor(sig, leg, &input_vol);
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// ── Place order ──
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int64_t t0 = now_monotonic_ms();
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char order_id[32];
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bool ok = place_order(sig, leg, input_vol, order_id);
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timing_append(timings, leg_i_order_fired);
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if (!ok) {
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emit_failed(sig, leg_output, timings, "order_rejected");
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return;
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}
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register_fill_listener(td, leg, order_id);
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// ── Wait for fill ──
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fill_result_t result;
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bool filled = await_fill(&td->fill_channel, order_id,
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FILL_TIMEOUT_MS, &result);
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timing_append(timings, leg_i_fill_received);
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if (sig->cancelled) { emit_aborted(...); return; }
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if (!filled) { emit_failed(...); return; }
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// ── Cascade ──
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leg_output[leg] = (sig->legs.legs[leg].side_is_buy)
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? result.total_size
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: result.total_funds;
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apply_balance_override(td, sig, leg, &leg_output[leg]);
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apply_fee_hold_reduction(sig, leg+1, &leg_output[leg]);
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apply_increment_floor(sig, leg+1, &leg_output[leg]);
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}
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double pnl = compute_pnl(leg_output, sig);
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emit_filled(sig, leg_output, timings, pnl);
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}
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```
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Helper functions (`cascade.c`):
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```c
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// Fee hold: funds * (1 + fee_rate) must not exceed balance.
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// Divide by (1 + fee_rate) when next leg is a buy.
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void apply_fee_hold_reduction(signal_entry_t *sig, int leg, double *vol);
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// Round down to the next leg's quote_increment (buy) or base_increment (sell).
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void apply_increment_floor(signal_entry_t *sig, int leg, double *vol);
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// Override with latest WS balance for sells (if await_balance enabled).
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void apply_balance_override(thread_data_t *td, signal_entry_t *sig,
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int leg, double *vol);
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// Leg 0 input → leg 2 output, compute profit in primary_quote.
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double compute_pnl(double *leg_output, signal_entry_t *sig);
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```
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### Phase 4 — REST Order Placement
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**New file:** `rest_client.c`, `rest_client.h`
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```c
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bool rest_order_place(const char *symbol, const char *side,
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double funds, double size,
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const char *client_oid,
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char *out_order_id, size_t out_sz,
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char *out_error, size_t err_sz);
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```
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- Signs request with HMAC-SHA256
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- POST to `/api/v1/hf/orders`
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- Parses JSON response, extracts `orderId` or error `code: msg`
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- Supports `funds` (buy) or `size` (sell) based on leg type
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```c
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bool rest_order_test(const char *symbol, const char *side,
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double funds, double size,
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char *out_error, size_t err_sz);
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```
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- POST to `/api/v1/hf/orders/test`
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- Same signing path, same response parsing
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Connection pool:
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- Store 1-2 reusable HTTPS sockets per executor thread
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- Keepalive via 30s interval timer (same pattern as `_keepalive_loop`)
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- On disconnect: reconnect once, fail immediately
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### Phase 5 — Paper Mode
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Paper mode in C uses the same `execute_triangle()` but:
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- Calls `rest_order_test()` instead of `rest_order_place()`
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- Simulates fills from `sig->books[leg]` (top-of-book ask/bid)
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- Same rounding, fee hold reduction, and increment flooring as live mode
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- No fill SPSC needed (simulated fill is synchronous)
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### Phase 6 — Concurrency & Isolation
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**New file:** `concurrency.c`, `concurrency.h`
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- `concurrent_slots`: number of executor threads = config value.
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- Isolation check (same triangle key, same pairs, same primary_quote):
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checked atomically in `execute_triangle` before starting.
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- In-flight tracking: array of `{ triangle_key, pair_mask, primary_quote }`,
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checked and set under a spinlock.
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- Cancel: `sig->cancelled` volatile flag, checked between legs.
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```c
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typedef struct {
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uint64_t triangle_hash; // fnv1a of triangle_key
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|
||||||
uint64_t pair_mask; // bitmask of pair indices
|
|
||||||
uint32_t primary_quote; // index into currency table
|
|
||||||
bool active;
|
|
||||||
} in_flight_t;
|
|
||||||
|
|
||||||
bool try_acquire_slot(signal_entry_t *sig); // isolation check + mark
|
|
||||||
void release_slot(signal_entry_t *sig); // unmark
|
|
||||||
```
|
|
||||||
|
|
||||||
### Phase 7 — Reporting
|
|
||||||
|
|
||||||
Reporting in C mirrors the current `_emit_report`:
|
|
||||||
|
|
||||||
```c
|
|
||||||
void emit_filled(signal_entry_t *sig, double *leg_output,
|
|
||||||
timing_t *timings, double pnl);
|
|
||||||
void emit_failed(signal_entry_t *sig, double *leg_output,
|
|
||||||
timing_t *timings, const char *error);
|
|
||||||
void emit_aborted(signal_entry_t *sig, double *leg_output,
|
|
||||||
timing_t *timings, const char *reason);
|
|
||||||
```
|
|
||||||
|
|
||||||
Output format (same as current, via `log_write`):
|
|
||||||
|
|
||||||
```
|
|
||||||
2026-05-26T17:55:53.719Z FILLED | corr=... | triangle=['USDT','FLUX','USDC'] |
|
|
||||||
predicted_bps=34.45 | effective_bps=-149.94 | book_ts=... | profit=-0.0749 |
|
|
||||||
timings=[...] | fills=[L0:buy FLUX-USDT USDT->FLUX 64.53@0.0774(fee=0 USDT lat=82.9ms), ...] |
|
|
||||||
books=[0.0774/0.0772 | 0.07796/0.07783 | 0.9991/0.999]
|
|
||||||
```
|
|
||||||
|
|
||||||
### Phase 8 — Cleanup
|
|
||||||
|
|
||||||
- Delete `executor/` directory (executor.py, ws_client.py, kucoin_api.py,
|
|
||||||
socket_server.py, config.py, __main__.py)
|
|
||||||
- Delete `common/` directory (log.py, config.py — logging replaced by
|
|
||||||
C `log_write` + log file handler)
|
|
||||||
- Remove UDS socket creation + connection from `events.c`
|
|
||||||
- Remove JSON signal serialisation from `events.c`
|
|
||||||
- Remove `send_signal_to_executor()` and all UDS references
|
|
||||||
- The `cold_epoll` set can be removed (executor threads don't use epoll;
|
|
||||||
they use `poll()` on fill eventfds)
|
|
||||||
|
|
||||||
## Migration Order
|
|
||||||
|
|
||||||
| Phase | Files | Deliverable | Risk |
|
|
||||||
|-------|-------|-------------|------|
|
|
||||||
| 1 | `http_client.c/h`, `kucoin_sign.c/h` | Can POST a test order | Low (OpenSSL HMAC is well-documented) |
|
|
||||||
| 2 | `fill_handler.c/h` | Can receive WS fill events in executor thread | Medium (hot↔executor SPSC race conditions) |
|
|
||||||
| 3 | `events.c` (executor thread), `cascade.c/h`, `rest_client.c/h` | Full live-mode triangle execution in C | High (first integration test) |
|
|
||||||
| 4 | `rest_client.c/h` (`order_place`) | Order placement via C | Medium (HTTP keep-alive bugs) |
|
|
||||||
| 5 | Paper mode via `rest_order_test` + book sim | Paper mode in C | Low (same logic, different HTTP endpoint) |
|
|
||||||
| 6 | `concurrency.c/h` | Slot isolation, cancel support | Low (simple atomic operations) |
|
|
||||||
| 7 | Reporting via `log_write` | Same FILLED/FAILED output | Low (string formatting) |
|
|
||||||
| 8 | Delete `executor/`, `common/` | No Python runtime dependency | Low (housekeeping) |
|
|
||||||
|
|
||||||
## Files to Create
|
|
||||||
|
|
||||||
```
|
|
||||||
src/http_client.c # HTTPS POST/GET with keepalive connection pool
|
|
||||||
src/http_client.h
|
|
||||||
src/kucoin_sign.c # HMAC-SHA256 + base64 signing helpers
|
|
||||||
src/kucoin_sign.h
|
|
||||||
src/fill_handler.c # Match event accumulation + dispatch (hot thread)
|
|
||||||
src/fill_handler.h
|
|
||||||
src/cascade.c # Fee hold reduction, increment floor, PnL compute
|
|
||||||
src/cascade.h
|
|
||||||
src/rest_client.c # order_place, order_test (wraps http_client + sign)
|
|
||||||
src/rest_client.h
|
|
||||||
src/concurrency.c # Isolation checks, in-flight tracking
|
|
||||||
src/concurrency.h
|
|
||||||
src/executor.c # execute_triangle() — the main execution loop
|
|
||||||
src/executor.h # (or inline in events.c / new executor_thread.c)
|
|
||||||
```
|
|
||||||
|
|
||||||
## Files to Modify
|
|
||||||
|
|
||||||
```
|
|
||||||
src/events.c # Remove UDS, add executor thread creation
|
|
||||||
src/ws_client.c # Add fill dispatch calls on match/terminal events
|
|
||||||
src/ws_client.h # Expose fill_dispatch_match / fill_dispatch_terminal
|
|
||||||
src/config.c # Add executor config fields (fill_timeout_ms, await_balance)
|
|
||||||
src/config.h # Same
|
|
||||||
src/CMakeLists.txt # Add new .c files
|
|
||||||
```
|
|
||||||
|
|
||||||
## Files to Delete
|
|
||||||
|
|
||||||
```
|
|
||||||
executor/ # Entire directory
|
|
||||||
common/ # Entire directory
|
|
||||||
```
|
|
||||||
|
|
@ -1,29 +0,0 @@
|
||||||
[project]
|
|
||||||
name = "triangular-arb"
|
|
||||||
version = "0.1.0"
|
|
||||||
description = "Triangular arbitrage bot for KuCoin"
|
|
||||||
readme = "README.md"
|
|
||||||
requires-python = ">=3.11"
|
|
||||||
dependencies = [
|
|
||||||
"websockets>=12.0",
|
|
||||||
"aiohttp>=3.9",
|
|
||||||
"structlog>=24.0",
|
|
||||||
"PyYAML>=6.0",
|
|
||||||
"fastapi>=0.110",
|
|
||||||
"uvicorn>=0.27",
|
|
||||||
"pydantic>=2.0",
|
|
||||||
"pydantic-settings>=2.0",
|
|
||||||
]
|
|
||||||
|
|
||||||
[project.optional-dependencies]
|
|
||||||
dev = [
|
|
||||||
"pytest>=8.0",
|
|
||||||
"pytest-asyncio>=0.23",
|
|
||||||
]
|
|
||||||
|
|
||||||
[build-system]
|
|
||||||
requires = ["setuptools>=61.0"]
|
|
||||||
build-backend = "setuptools.build_meta"
|
|
||||||
|
|
||||||
[tool.setuptools.packages.find]
|
|
||||||
where = ["."]
|
|
||||||
|
|
@ -1,26 +0,0 @@
|
||||||
#!/usr/bin/env bash
|
|
||||||
set -euo pipefail
|
|
||||||
|
|
||||||
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
|
|
||||||
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
|
|
||||||
|
|
||||||
# System build dependencies
|
|
||||||
sudo apt-get update -qq
|
|
||||||
sudo apt-get install -y -qq \
|
|
||||||
cmake build-essential pkg-config \
|
|
||||||
libssl-dev libyaml-dev
|
|
||||||
|
|
||||||
# Python virtualenv (for executor)
|
|
||||||
python3 -m venv "$PROJECT_DIR/.venv"
|
|
||||||
source "$PROJECT_DIR/.venv/bin/activate"
|
|
||||||
pip install --upgrade pip
|
|
||||||
pip install -e "$PROJECT_DIR[dev]"
|
|
||||||
|
|
||||||
# Build fused_engine C binary
|
|
||||||
cd "$PROJECT_DIR"
|
|
||||||
mkdir -p build
|
|
||||||
cd build
|
|
||||||
cmake ../src -DCMAKE_BUILD_TYPE=Release
|
|
||||||
make -j"$(nproc)"
|
|
||||||
|
|
||||||
echo "Done. Activate Python venv with: source $PROJECT_DIR/.venv/bin/activate"
|
|
||||||
Loading…
Reference in New Issue