+def get_donations(agreement_id, year):
+    a = get_agreement(agreement_id)
+    transactions = []
+    for transaction in a.search_transactions(
+            date(year - 1, 12, 31),
+            date(year + 1, 1, 1))['agreement_transaction_list']:
+        if transaction['status'] != 'Completed':
+            continue
+        dt = datetime.strptime(
+            transaction['time_stamp'],
+            '%Y-%m-%dT%H:%M:%S%z'
+        ).astimezone()
+        if dt.year != year:
+            continue
+        assert transaction['amount']['currency'] == 'PLN'
+        transactions.append({
+            'timestamp': dt,
+            'amount': Decimal(transaction['amount']['value'])
+        })
+    return transactions