take custom fee not default

lib/src/commands.rs

@@ -556,17 +556,27 @@ impl Command for SendCommand {
         // Transform transaction data into the required format (String -> &str).
         let tos = send_args.iter().map(|(a, v, m, _)| (a.as_str(), *v, m.clone())).collect::<Vec<_>>();
         
-        let default_fee = DEFAULT_FEE.try_into().unwrap();
         // Calculate the total fee for all transactions.
-
         // This assumes that all transactions have the same fee. 
         // If they can have different fees, you need to modify this logic.
-        let total_fee = send_args.iter()
-        .filter_map(|(_, _, _, fee)| Some(*fee))
-        .next()
-        .unwrap_or(default_fee);
+        
+        let default_fee: u64 = DEFAULT_FEE.try_into().unwrap(); 
+        let mut fee_found = false;
+        let mut total_fee = default_fee;  
+
+            for (_, _, _, fee) in send_args.iter() {
+            if *fee != default_fee{
+                total_fee = *fee;
+                fee_found = true;
+                break;  
+    }
+}
 
-        println!("Fee used : {:?}", total_fee);
+        if fee_found {
+            println!("Using custom fee: {:?}", total_fee);
+    }   else {
+            println!("Using default fee: ");
+    }
 
         // Execute the transaction and handle the result.
         match lightclient.do_send(tos, &total_fee) {