Poll chainstates.

Litecoin download link changed.
Fix fee comparison tx weight difference.
Remove format8.
New stalled for test bid state.
Moved sequence code to coin interfaces.
Display estimated time lock refund tx will be valid.

basicswap/js_server.py

@@ -8,7 +8,6 @@ import json
 import urllib.parse
 
 from .util import (
-    format8,
     format_timestamp,
 )
 from .basicswap import (
@@ -174,7 +173,8 @@ def js_bids(self, url_split, post_string, is_json):
         'bid_id': b[1].hex(),
         'offer_id': b[2].hex(),
         'created_at': format_timestamp(b[0]),
-        'amount_from': format8(b[3]),
+        'coin_from': b[8],
+        'amount_from': swap_client.ci(b[8]).format_amount(b[3]),
         'bid_state': strBidState(b[4])
     } for b in bids]), 'UTF-8')