Various

liberapay/billing/payday.py

@@ -715,6 +715,7 @@ def update_stats(cls, payday_id):
                          FROM participants p
                         WHERE p.kind IN ('individual', 'organization')
                           AND p.join_time < %(ts_start)s
+                          AND p.is_suspended IS NOT true
                           AND COALESCE((
                                 SELECT payload::text
                                   FROM events e

liberapay/main.py

@@ -36,7 +36,8 @@
 from liberapay.models.account_elsewhere import refetch_elsewhere_data
 from liberapay.models.community import Community
 from liberapay.models.participant import (
-    Participant, clean_up_closed_accounts, send_account_disabled_notifications,
+    Participant, clean_up_closed_accounts, free_up_usernames,
+    send_account_disabled_notifications,
     generate_profile_description_missing_notifications
 )
 from liberapay.models.repository import refetch_repos
@@ -185,6 +186,7 @@ def default_body_parser(body_bytes, headers):
     cron(Daily(hour=17), paypal.sync_all_pending_payments, True)
     cron(Daily(hour=18), Payday.update_cached_amounts, True)
     cron(Daily(hour=19), Participant.delete_old_feedback, True)
+    cron(Daily(hour=20), free_up_usernames, True)
     cron(intervals.get('notify_patrons', 1200), Participant.notify_patrons, True)
     if conf.ses_feedback_queue_url:
         cron(intervals.get('fetch_email_bounces', 60), handle_email_bounces, True)

liberapay/models/participant.py

@@ -3199,10 +3199,17 @@ def get_tips_awaiting_payment(self, weeks_early=3, exclude_recipients_of=None):
             SELECT t.*, p AS tippee_p
               FROM current_tips t
               JOIN participants p ON p.id = t.tippee
+         LEFT JOIN scheduled_payins sp ON sp.payer = t.tipper
+                                      AND sp.payin IS NULL
+                                      AND t.tippee::text IN (
+                                              SELECT tr->>'tippee_id'
+                                                FROM json_array_elements(sp.transfers) tr
+                                          )
              WHERE t.tipper = %(tipper_id)s
                AND t.renewal_mode > 0
                AND ( t.paid_in_advance IS NULL OR
-                     t.paid_in_advance < (t.amount * %(weeks_early)s)
+                     t.paid_in_advance < (t.amount * %(weeks_early)s) OR
+                     sp.execution_date <= (current_date + interval '%(weeks_early)s weeks')
                    )
                AND p.status = 'active'
                AND ( p.goal IS NULL OR p.goal >= 0 )
@@ -3747,6 +3754,28 @@ def clean_up_closed_accounts():
     return len(participants)
 
 
+def free_up_usernames():
+    n = website.db.one("""
+        WITH updated AS (
+            UPDATE participants
+               SET username = '~' || id::text
+             WHERE username NOT LIKE '~%'
+               AND marked_as IN ('fraud', 'spam')
+               AND kind IN ('individual', 'organization')
+               AND (
+                       SELECT e.ts
+                         FROM events e
+                        WHERE e.participant = participants.id
+                          AND e.type = 'flags_changed'
+                     ORDER BY e.ts DESC
+                        LIMIT 1
+                   ) < (current_timestamp - interval '3 weeks')
+         RETURNING id
+        ) SELECT count(*) FROM updated;
+    """)
+    print(f"Freed up {n} username{'s' if n > 1 else ''}.")
+
+
 def send_account_disabled_notifications():
     """Notify the owners of accounts that have been flagged as fraud or spam.
 

liberapay/payin/stripe.py

@@ -739,12 +739,19 @@
         tr = stripe.Transfer.retrieve(charge.transfer)
         update_transfer_metadata(tr, pt)
         if tr.amount_reversed < bt.fee:
-            tr.reversals.create(
-                amount=bt.fee,
-                description="Stripe fee",
-                metadata={'payin_id': payin.id},
-                idempotency_key='payin_fee_%i' % payin.id,
-            )
+            try:
+                tr.reversals.create(
+                    amount=bt.fee,
+                    description="Stripe fee",
+                    metadata={'payin_id': payin.id},
+                    idempotency_key='payin_fee_%i' % payin.id,
+                )
+            except stripe.error.StripeError as e:
+                # In some cases Stripe can refuse to create a reversal. This is
+                # a serious problem, it means that Liberapay is losing money,
+                # but it can't be properly resolved automatically, so here the
+                # error is merely sent to Sentry.
+                website.tell_sentry(e)
         elif tr.amount_reversed > bt.fee:
             reversed_amount = int_to_Money(tr.amount_reversed, tr.currency) - fee
             record_reversals(db, pt, tr)

www/%username/giving/pay/%payment_id.spt

@@ -50,7 +50,7 @@ elif payin_id:
         raise response.error(404, "unknown payin ID in URL path")
     response.redirect(payer.path('giving/pay/stripe/%i' % payin.id))
 
-weeks_early = request.qs.get_int('weeks_early', default=3)
+weeks_early = request.qs.get_int('weeks_early', default=3, minimum=1, maximum=520)
 donation_groups, n_fundable = payer.get_tips_awaiting_payment(weeks_early)
 donations_not_fundable = (
     donation_groups['no_provider'] +