swapserver: cleanup, add description

electrum/plugins/swapserver/__init__.py

@@ -1,6 +1,15 @@
 from electrum.i18n import _
 
 fullname = _('SwapServer')
-description = ''
+description = """
+Submarine swap server for an Electrum daemon.
+
+Example setup:
+
+  electrum -o setconfig use_swapserver True
+  electrum -o setconfig swapserver_address localhost:5455
+  electrum daemon -v
+
+"""
 
 available_for = ['qt', 'cmdline']

electrum/plugins/swapserver/server.py

@@ -38,7 +38,6 @@ class SwapServer(Logger, EventListener):
     @ignore_exceptions
     @log_exceptions
     async def run(self):
-        self.root = '/root'
         app = web.Application()
         app.add_routes([web.get('/api/getpairs', self.get_pairs)])
         app.add_routes([web.post('/api/createswap', self.create_swap)])
@@ -57,7 +56,6 @@ class SwapServer(Logger, EventListener):
             "warnings": [],
             "pairs": {
                 "BTC/BTC": {
-                    "hash": "dfe692a026d6964601bfd79703611af333d1d5aa49ef5fedd288f5a620fced60",
                     "rate": 1,
                     "limits": {
                         "maximal": sm._max_amount,