Show protocol version in sessions RPC call

server/controller.py

@@ -542,13 +542,14 @@ class Controller(util.LoggedClass):
         '''A generator returning lines for a list of sessions.
 
         data is the return value of rpc_sessions().'''
-        fmt = ('{:<6} {:<5} {:>17} {:>5} {:>5} '
+        fmt = ('{:<6} {:<5} {:>17} {:>5} {:>5} {:>5} '
                '{:>7} {:>7} {:>7} {:>7} {:>7} {:>9} {:>21}')
-        yield fmt.format('ID', 'Flags', 'Client', 'Reqs', 'Txs', 'Subs',
+        yield fmt.format('ID', 'Flags', 'Client', 'Proto',
+                         'Reqs', 'Txs', 'Subs',
                          'Recv', 'Recv KB', 'Sent', 'Sent KB', 'Time', 'Peer')
-        for (id_, flags, peer, client, reqs, txs_sent, subs,
+        for (id_, flags, peer, client, proto, reqs, txs_sent, subs,
              recv_count, recv_size, send_count, send_size, time) in data:
-            yield fmt.format(id_, flags, client,
+            yield fmt.format(id_, flags, client, proto,
                              '{:,d}'.format(reqs),
                              '{:,d}'.format(txs_sent),
                              '{:,d}'.format(subs),
@@ -566,6 +567,7 @@ class Controller(util.LoggedClass):
                  session.flags(),
                  session.peername(for_log=for_log),
                  session.client,
+                 session.protocol_version,
                  session.count_pending_items(),
                  session.txs_sent,
                  session.sub_count(),

server/session.py

@@ -113,6 +113,7 @@ class ElectrumX(SessionBase):
         self.hashX_subs = {}
         self.mempool_statuses = {}
         self.chunk_indices = []
+        self.protocol_version = None
         self.set_protocol_handlers((1, 0))
 
     def sub_count(self):
@@ -322,8 +323,6 @@ class ElectrumX(SessionBase):
             except Exception:
                 pass
 
-        self.log_info('protocol version {} requested'.format(protocol_version))
-
         # Find the highest common protocol version.  Disconnect if
         # that protocol version in unsupported.
         ptuple = util.protocol_version(protocol_version, version.PROTOCOL_MIN,
@@ -336,10 +335,11 @@ class ElectrumX(SessionBase):
 
         self.set_protocol_handlers(ptuple)
 
+        # The return value depends on the protocol version
         if ptuple < (1, 1):
             return version.VERSION
-
+        else:
-        return (version.VERSION, '.'.join(str(part) for part in ptuple))
+            return (version.VERSION, self.protocol_version)
 
     async def transaction_broadcast(self, raw_tx):
         '''Broadcast a raw transaction to the network.
@@ -382,6 +382,10 @@ class ElectrumX(SessionBase):
             return message
 
     def set_protocol_handlers(self, ptuple):
+        protocol_version = '.'.join(str(part) for part in ptuple)
+        if protocol_version == self.protocol_version:
+            return
+        self.protocol_version = protocol_version
         controller = self.controller
         handlers = {
             'blockchain.address.get_balance': controller.address_get_balance,
@@ -438,6 +442,7 @@ class LocalRPC(SessionBase):
         super().__init__(*args, **kwargs)
         self.client = 'RPC'
         self.max_send = 0
+        self.protocol_version = 'RPC'
 
     def request_handler(self, method):
         '''Return the async handler for the given request method.'''