p2p: do not format raw msg bytes

While debugging the mempool issue (#5796), I've noticed we're spending
quite a bit of time encoding blobs of data, which never get printed! The
reason is filtering occurs on the level below, so Go runtime rightfully
evaluates function arguments.

I think it's okay to not format raw bytes.

p2p/conn/connection.go

@@ -352,7 +352,7 @@ func (c *MConnection) Send(chID byte, msgBytes []byte) bool {
 		return false
 	}
 
-	c.Logger.Debug("Send", "channel", chID, "conn", c, "msgBytes", fmt.Sprintf("%X", msgBytes))
+	c.Logger.Debug("Send", "channel", chID, "conn", c, "msgBytes", msgBytes)
 
 	// Send message to channel.
 	channel, ok := c.channelsIdx[chID]
@@ -369,7 +369,7 @@ func (c *MConnection) Send(chID byte, msgBytes []byte) bool {
 		default:
 		}
 	} else {
-		c.Logger.Debug("Send failed", "channel", chID, "conn", c, "msgBytes", fmt.Sprintf("%X", msgBytes))
+		c.Logger.Debug("Send failed", "channel", chID, "conn", c, "msgBytes", msgBytes)
 	}
 	return success
 }
@@ -381,7 +381,7 @@ func (c *MConnection) TrySend(chID byte, msgBytes []byte) bool {
 		return false
 	}
 
-	c.Logger.Debug("TrySend", "channel", chID, "conn", c, "msgBytes", fmt.Sprintf("%X", msgBytes))
+	c.Logger.Debug("TrySend", "channel", chID, "conn", c, "msgBytes", msgBytes)
 
 	// Send message to channel.
 	channel, ok := c.channelsIdx[chID]
@@ -640,7 +640,7 @@ FOR_LOOP:
 				break FOR_LOOP
 			}
 			if msgBytes != nil {
-				c.Logger.Debug("Received bytes", "chID", pkt.PacketMsg.ChannelID, "msgBytes", fmt.Sprintf("%X", msgBytes))
+				c.Logger.Debug("Received bytes", "chID", pkt.PacketMsg.ChannelID, "msgBytes", msgBytes)
 				// NOTE: This means the reactor.Receive runs in the same thread as the p2p recv routine
 				c.onReceive(byte(pkt.PacketMsg.ChannelID), msgBytes)
 			}

p2p/switch.go

@@ -272,7 +272,7 @@ func (sw *Switch) OnStop() {
 //
 // NOTE: Broadcast uses goroutines, so order of broadcast may not be preserved.
 func (sw *Switch) Broadcast(chID byte, msgBytes []byte) chan bool {
-	sw.Logger.Debug("Broadcast", "channel", chID, "msgBytes", fmt.Sprintf("%X", msgBytes))
+	sw.Logger.Debug("Broadcast", "channel", chID, "msgBytes", msgBytes)
 
 	peers := sw.peers.List()
 	var wg sync.WaitGroup

rpc/jsonrpc/client/ws_client.go

@@ -511,7 +511,7 @@ func (c *WSClient) readRoutine() {
 		// c.wg.Wait() in c.Stop(). Note we rely on Quit being closed so that it sends unlimited Quit signals to stop
 		// both readRoutine and writeRoutine
 
-		c.Logger.Info("got response", "id", response.ID, "result", fmt.Sprintf("%X", response.Result))
+		c.Logger.Info("got response", "id", response.ID, "result", response.Result)
 
 		select {
 		case <-c.Quit():