feat: Update endpoint checkout

app/api/endpoints/checkout.py

@@ -1 +1,32 @@
-new route
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+from typing import Optional
+
+from app.db import get_db
+from app.models import Payment
+from app.schemas import PaymentCreate, PaymentResponse
+
+router = APIRouter()
+
+@router.post("/payment", response_model=PaymentResponse)
+async def create_payment(
+    payment: PaymentCreate,
+    db: Session = Depends(get_db),
+    user_id: Optional[int] = None,
+):
+    """
+    Create a new payment record.
+
+    Args:
+        payment (PaymentCreate): The payment data to create.
+        db (Session, optional): The database session. Defaults to Depends(get_db).
+        user_id (Optional[int], optional): The user ID associated with the payment. Defaults to None.
+
+    Returns:
+        PaymentResponse: The created payment record.
+    """
+    db_payment = Payment(**payment.dict(), user_id=user_id)
+    db.add(db_payment)
+    db.commit()
+    db.refresh(db_payment)
+    return db_payment