Stripe fixes

liberapay/payin/common.py

@@ -558,6 +558,9 @@
 
     Returns a copy of `base_amounts` with updated values.
     """
+    if available_amount < (minimum_amount or 0):
+        raise ValueError("available_amount can't be less than minimum_amount or 0")
+
     currency = available_amount.currency
     zero = Money.ZEROS[currency]
     inf = Money('inf', currency)

liberapay/payin/stripe.py

@@ -483,7 +483,7 @@
       ORDER BY pt.id
     """, (payin.id,))
     last = len(payin_transfers) - 1
-    if amount_settled is not None:
+    if charge.status == 'succeeded':
         payer = db.Participant.from_id(payin.payer)
         undeliverable_amount = amount_settled.zero()
         for i, pt in enumerate(payin_transfers):
@@ -501,7 +501,7 @@
                     )
                 elif pt.status in ('pre', 'pending'):
                     pt = execute_transfer(
-                        db, pt, pt.destination_id, charge.id,
+                        db, pt, charge.id,
                         update_donor=(update_donor and i == last),
                     )
             else:
@@ -542,7 +542,8 @@
                         update_donor=(update_donor and i == last),
                     )
 
-    elif charge.status in ('failed', 'pending'):
+    else:
+        assert charge.status in ('failed', 'pending')
         for i, pt in enumerate(payin_transfers):
             update_payin_transfer(
                 db, pt.id, None, charge.status, error,
@@ -552,12 +553,11 @@
     return payin
 
 
-def execute_transfer(db, pt, destination, source_transaction, update_donor=True):
+def execute_transfer(db, pt, source_transaction, update_donor=True):
     """Create a Transfer.
 
     Args:
         pt (Record): a row from the `payin_transfers` table
-        destination (str): the Stripe ID of the destination account
         source_transaction (str): the ID of the Charge this transfer is linked to
 
     Returns:
@@ -570,7 +570,7 @@
             amount=Money_to_int(pt.amount),
             currency=pt.amount.currency,
             description=generate_transfer_description(pt),
-            destination=destination,
+            destination=pt.destination_id,
             metadata={'payin_transfer_id': pt.id},
             source_transaction=source_transaction,
             idempotency_key='payin_transfer_%i' % pt.id,
@@ -583,9 +583,9 @@
                    SET is_current = null
                  WHERE provider = 'stripe'
                    AND id = %s
-            """, (destination,))
+            """, (pt.destination_id,))
             alternate_destination = db.one("""
-                SELECT id
+                SELECT id, pk
                   FROM payment_accounts
                  WHERE participant = %(p_id)s
                    AND provider = 'stripe'
@@ -597,7 +597,14 @@
                  LIMIT 1
             """, dict(p_id=pt.recipient, SEPA=SEPA, currency=pt.amount.currency))
             if alternate_destination:
-                return execute_transfer(db, pt, alternate_destination, source_transaction)
+                pt = db.one("""
+                    UPDATE payin_transfers
+                       SET destination = %s
+                     WHERE id = %s
+                 RETURNING *
+                """, (alternate_destination.pk, pt.id))
+                pt.destination_id = alternate_destination.id
+                return execute_transfer(db, pt, source_transaction)
             error = "The recipient's account no longer exists."
             return update_payin_transfer(
                 db, pt.id, None, 'failed', error, update_donor=update_donor,

www/%username/giving/pay/stripe/%payin_id.spt

@@ -256,7 +256,7 @@ if tippees:
     if len(tips) == 1:
         proto_transfers = resolve_tip(
             website.db, tips[0], tips[0].tippee_p, 'stripe', payer, payer.guessed_country,
-            tips[0].periodic_amount
+            tips[0].amount * 52
         )
         if len(proto_transfers) == 1:
             if proto_transfers[0].destination.country not in constants.SEPA: