update question

fastapi-python/main.py

@@ -5,16 +5,18 @@ from pydantic import BaseModel
 
 class Transfer(BaseModel):
     amount: int
-    sender: int
-    receiver: int
+    sender: str
+    receiver: str
 
 app = FastAPI()
 
 accounts = {
-    '1': {'amount': 1000},
-    '2': {'amount': 1000},
+    '1': 1000,
+    '2': 1000,
 }
 
+transactions: list[Transfer] = []
+
 @app.post("/transfer")
 def transfer(transfer: Transfer):
     amount = transfer.amount