diff --git a/iguana/exchanges/LP_nativeDEX.c b/iguana/exchanges/LP_nativeDEX.c
index 8b0201795..bf0591e44 100644
--- a/iguana/exchanges/LP_nativeDEX.c
+++ b/iguana/exchanges/LP_nativeDEX.c
@@ -21,9 +21,10 @@
 // stats
 // auto-utxo creation
 // null plocktime, robustify remember
+// verify BTC trading: 0 txfee on remember trades. even with invalid tx, thinks swap is completed RETSTR.({"result":null,"error":{"code":-26,"message":"66: insufficient priority"},"id":"jl777"}
+//) BTC.0000000000000000000000000000000000000000000000000000000000000000
 // multiple smartaddresses? enable/disable causes? 250 KMD bounty
 // verify bid volumes
-// verify BTC trading
 
 #include <stdio.h>
 #include "LP_include.h"
diff --git a/iguana/exchanges/LP_swap.c b/iguana/exchanges/LP_swap.c
index e282d8cc0..7e7726c1c 100644
--- a/iguana/exchanges/LP_swap.c
+++ b/iguana/exchanges/LP_swap.c
@@ -801,7 +801,11 @@ void LP_aliceloop(void *_swap)
         free(swap);
     }
     free(data);
-    nn_close(swap->N.pair);
+    if ( swap->N.pair >= 0 )
+    {
+        nn_close(swap->N.pair);
+        swap->N.pair = -1;
+    }
 }
 
 bits256 instantdex_derivekeypair(void *ctx,bits256 *newprivp,uint8_t pubkey[33],bits256 privkey,bits256 orderhash)