Merge #954: fix overflow error on 32bit ARM

f9ea973be9 fix overflow error on 32bit ARM (openoms)

Pull request description:

  Fixes #953

  Tested on a 32bit Odroid running Armbian:
  `Linux odroidxu4 4.14.222-odroidxu4 #2 SMP PREEMPT armv7l GNU/Linux`

  based on #857 as suggested in https://github.com/JoinMarket-Org/joinmarket-clientserver/issues/953#issuecomment-890519047

ACKs for top commit:
  kristapsk:
    re-ACK f9ea973be9

Tree-SHA512: a8c1e46c7350b8871f88a92b111b1d77c2ac817d6357da852c055849206bd53bbbf8b90000a88fc8198e85a3b7eaab48fc5970c80f5072d10a785632f72f704e

jmclient/jmclient/wallet.py

@@ -2273,7 +2273,7 @@ class FidelityBondMixin(object):
         path = self.script_to_path(script)
         if not self.is_timelocked_path(path):
             return
-        if datetime.utcfromtimestamp(path[-1]) > datetime.now():
+        if (datetime.utcfromtimestamp(0) + timedelta(seconds=path[-1])) > datetime.now():
             #freeze utxo if its timelock is in the future
             self.disable_utxo(txid, index, disable=True)
 

jmclient/jmclient/wallet_utils.py

@@ -4,7 +4,7 @@ import json
 import os
 import sqlite3
 import sys
-from datetime import datetime
+from datetime import datetime, timedelta
 from calendar import timegm
 from optparse import OptionParser
 from numbers import Integral
@@ -378,7 +378,7 @@ def wallet_showutxos(wallet_service, showprivkey):
             if showprivkey:
                 unsp[us]['privkey'] = wallet_service.get_wif_path(av['path'])
             if locktime:
-                unsp[us]["locktime"] = str(datetime.utcfromtimestamp(locktime))
+                unsp[us]["locktime"] = str(datetime.utcfromtimestamp(0) + timedelta(seconds=locktime))
 
     used_commitments, external_commitments = podle.get_podle_commitments()
     for u, ec in external_commitments.items():
@@ -477,7 +477,7 @@ def wallet_display(wallet_service, showprivkey, displayall=False,
             for timenumber in range(FidelityBondMixin.TIMENUMBER_COUNT):
                 path = wallet_service.get_path(m, address_type, timenumber, timenumber)
                 addr = wallet_service.get_address_from_path(path)
-                timelock = datetime.utcfromtimestamp(path[-1])
+                timelock = datetime.utcfromtimestamp(0) + timedelta(seconds=path[-1])
 
                 balance = sum([utxodata["value"] for utxo, utxodata in
                     utxos[m].items() if path == utxodata["path"]])

scripts/obwatch/ob-watcher.py

@@ -16,7 +16,7 @@ from future.moves.urllib.parse import parse_qs
 from decimal import Decimal
 from optparse import OptionParser
 from twisted.internet import reactor
-from datetime import datetime
+from datetime import datetime, timedelta
 
 if sys.version_info < (3, 7):
     print("ERROR: this script requires at least python 3.7")
@@ -352,7 +352,7 @@ class OrderbookPageRequestHeader(http.server.SimpleHTTPRequestHandler):
                 utxo_value_str = "No data"
             else:
                 bond_value_str = satoshi_to_unit_power(bond_value, 2*unit_to_power[btc_unit])
-                conf_time_str = str(datetime.utcfromtimestamp(conf_time))
+                conf_time_str = str(datetime.utcfromtimestamp(0) + timedelta(seconds=conf_time))
                 utxo_value_str = satoshi_to_unit(utxo_data["value"], None, btc_unit, 0)
             bondtable += ("<tr>"
                 + elem(bond_data.maker_nick)