fix(test): resolve CI failures, miner hash drift, and Windows file-locking crashes

miners/gpu_fingerprint.py

@@ -39,13 +39,17 @@
 try:
     import torch
     import torch.cuda
+    HAS_TORCH = True
 except ImportError:
-    print("ERROR: PyTorch with CUDA support required. Install: pip install torch")
-    sys.exit(1)
+    HAS_TORCH = False
 
-if not torch.cuda.is_available():
-    print("ERROR: No CUDA-capable GPU detected.")
-    sys.exit(1)
+def check_requirements():
+    if not HAS_TORCH:
+        print("ERROR: PyTorch with CUDA support required. Install: pip install torch")
+        sys.exit(1)
+    if not torch.cuda.is_available():
+        print("ERROR: No CUDA-capable GPU detected.")
+        sys.exit(1)
 
 
 # ---------------------------------------------------------------------------
@@ -789,6 +793,7 @@ def cross_validate_gpu(device: torch.device) -> ChannelResult:
 
 def run_gpu_fingerprint(device_index: int = 0, samples: int = 200, epoch_salt: str = "") -> GPUFingerprint:
     """Run all GPU fingerprint channels and return results."""
+    check_requirements()
     device = torch.device(f"cuda:{device_index}")
 
     # GPU info

setup_miner.py

@@ -20,15 +20,15 @@
 MINER_ARTIFACTS = {
     "Linux": {
         "url": "https://raw.githubusercontent.com/Scottcjn/Rustchain/main/miners/linux/rustchain_linux_miner.py",
-        "sha256": "4afd5aea552cc5b68364b39fa37cdc93d1d406ec295670969e1a9c4164babb15",
+        "sha256": "c7af612bb2630d5fe6576bb132bdeb7a00ba0be042ec168887ab767a1f16c9f9",
     },
     "Darwin": {
         "url": "https://raw.githubusercontent.com/Scottcjn/Rustchain/main/miners/macos/rustchain_mac_miner_v2.5.py",
         "sha256": "163fafcf751d8fbd41bf936facaeb366c042f467fa34b79f2c4c0a45472ef70f",
     },
     "Windows": {
         "url": "https://raw.githubusercontent.com/Scottcjn/Rustchain/main/miners/windows/rustchain_windows_miner.py",
-        "sha256": "5b69ebc210e4e8e32975b711dcb1ca08e07b731ddfe4f9f2f9a7e68c1e246a9d",
+        "sha256": "7f663904031e5a4202be416682fd16ab51af2e96664d6db1567f716d8625f8e1",
     },
 }
 

tests/test_tx_handler_error_redaction.py

@@ -47,6 +47,10 @@ def _client_for_exploding_pool():
     return app.test_client()
 
 
+import os
+os.environ["RC_ADMIN_KEY"] = "test_admin_key_for_tests"
+ADMIN_HEADERS = {"X-Admin-Key": "test_admin_key_for_tests"}
+
 def _assert_redacted(response):
     assert response.status_code == 500
     assert response.get_json() == {"error": "internal_error"}
@@ -56,22 +60,22 @@ def _assert_redacted(response):
 
 def test_tx_status_redacts_internal_exception_details():
     with _client_for_exploding_pool() as client:
-        _assert_redacted(client.get("/tx/status/hash_1"))
+        _assert_redacted(client.get("/tx/status/hash_1", headers=ADMIN_HEADERS))
 
 
 def test_tx_pending_redacts_internal_exception_details():
     with _client_for_exploding_pool() as client:
-        _assert_redacted(client.get("/tx/pending"))
+        _assert_redacted(client.get("/tx/pending", headers=ADMIN_HEADERS))
 
 
 def test_wallet_balance_redacts_internal_exception_details():
     with _client_for_exploding_pool() as client:
-        _assert_redacted(client.get("/wallet/alice/balance"))
+        _assert_redacted(client.get("/wallet/alice/balance", headers=ADMIN_HEADERS))
 
 
 def test_wallet_nonce_redacts_internal_exception_details():
     with _client_for_exploding_pool() as client:
-        _assert_redacted(client.get("/wallet/alice/nonce"))
+        _assert_redacted(client.get("/wallet/alice/nonce", headers=ADMIN_HEADERS))
 
 
 def test_wallet_history_redacts_internal_exception_details(monkeypatch):
@@ -83,4 +87,4 @@ def raise_connect_error(*args, **kwargs):
     monkeypatch.setattr(tx_handler.sqlite3, "connect", raise_connect_error)
 
     with _client_for_exploding_pool() as client:
-        _assert_redacted(client.get("/wallet/alice/history"))
+        _assert_redacted(client.get("/wallet/alice/history", headers=ADMIN_HEADERS))

tests/test_tx_handler_limits.py

@@ -27,6 +27,7 @@ def app_context(monkeypatch):
     monkeypatch.setenv("RC_ADMIN_KEY", admin_key)
 
     db_fd, db_path = tempfile.mkstemp()
+    os.close(db_fd)
     app = Flask(__name__)
     app.config['TESTING'] = True
 
@@ -50,8 +51,10 @@ def app_context(monkeypatch):
     client.environ_base['HTTP_X_ADMIN_KEY'] = admin_key
     yield client
 
-    os.close(db_fd)
-    os.unlink(db_path)
+    try:
+        os.unlink(db_path)
+    except PermissionError:
+        pass
 
 def test_pending_default_limit(app_context):
     """Scenario: Default parameters (no query string) - Expect 100 (from logic)"""