Реализованы сервисы ВМ2 - проверка сообщений и синхронизация с Б24 (деплой еще без перевода в боевой режим)

codebase/services/message-safety/app/fingerprint.py

@@ -0,0 +1,41 @@
+from __future__ import annotations
+
+import hashlib
+import json
+import math
+from typing import Any
+
+from pydantic import BaseModel
+
+
+def _jcs(value: Any) -> str:
+    """Deterministic JSON close to RFC 8785 for this integer/string DTO domain."""
+    if value is None:
+        return "null"
+    if value is True:
+        return "true"
+    if value is False:
+        return "false"
+    if isinstance(value, str):
+        return json.dumps(value, ensure_ascii=False, separators=(",", ":"))
+    if isinstance(value, int):
+        return str(value)
+    if isinstance(value, float):
+        if not math.isfinite(value):
+            raise ValueError("non-finite numbers are not JSON canonicalizable")
+        raise TypeError("floating point values are forbidden in safety fingerprints")
+    if isinstance(value, list):
+        return "[" + ",".join(_jcs(item) for item in value) + "]"
+    if isinstance(value, dict):
+        keys = sorted(value, key=lambda key: key.encode("utf-16be"))
+        return "{" + ",".join(f"{_jcs(key)}:{_jcs(value[key])}" for key in keys) + "}"
+    raise TypeError(f"unsupported fingerprint type: {type(value).__name__}")
+
+
+def canonical_json(model: BaseModel | dict[str, Any]) -> bytes:
+    value = model.model_dump(mode="json") if isinstance(model, BaseModel) else model
+    return _jcs(value).encode("utf-8")
+
+
+def fingerprint(model: BaseModel | dict[str, Any]) -> bytes:
+    return hashlib.sha256(canonical_json(model)).digest()