let seed nodes not error on orderbook requests

Author: mariocynicys

mm2src/mm2_main/src/lp_ordermatch.rs

@@ -432,7 +432,13 @@ async fn request_and_fill_orderbook(ctx: &MmArc, base: &str, rel: &str) -> Resul
             },
             _peer_id,
         )) => (pubkey_orders, protocol_infos, conf_infos),
-        None => return Err("No response received from any peer for GetOrderbook request".to_string()),
+        None => {
+            if i_am_seed {
+                return Ok(());
+            } else {
+                return Err("No response received from any peer for GetOrderbook request".to_string());
+            }
+        },
     };
 
     let ordermatch_ctx = OrdermatchContext::from_ctx(ctx).unwrap();