(20241216) Payment auth bug fix.

models/api/chat/auth.py

@@ -36,7 +36,7 @@ sys.path.append(".")
 sys.path.append("..")
 
 # For making data behaviour_models:
-from pydantic import BaseModel, Field, field_validator, PastDatetime
+from pydantic import BaseModel, Field, field_validator, PastDatetime, model_validator
 from typing import Optional, Literal, Union
 
 # My utils:
@@ -132,6 +132,21 @@ class ChatAuthRequestData(BaseModel):
     class Config:
         extra = "forbid"
 
+    # ┓┏  ┓• ┓   •
+    # ┃┃┏┓┃┓┏┫┏┓╋┓┏┓┏┓
+    # ┗┛┗┻┗┗┗┻┗┻┗┗┗┛┛┗
+
+    @model_validator(mode = "after")
+    def ensure_harmony(cls, values):
+        client = values.client
+        auth = values.auth
+        harmony_map = {
+            "telegram": TelegramAuth
+        }
+        if not isinstance(auth, harmony_map[client]):
+            raise ValueError(f"incorrect 'auth' for selected client '{client}'")
+        return values
+
 
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