bug fix dell'ultimo secondo

README.md

@@ -12,7 +12,7 @@ There are 2 ways to enable a tag:
 
 If the tag is not enabled and has never been read, in the event of an access attempt, it will have 3 possibilities to be enabled.
 If it is not enabled within the third attempt, the tag will be blocked.
-
+if a tag is enabled, it is removed from the blocked list and its attempts are reset
 
 If a tag is blocked it is always possible to unlock it by enabling it.
 

lib/NfcKeyManager.dart

@@ -57,7 +57,10 @@ class NfcManager {
       if (availableKey.contains(tag.id) == true) {
         availableKey.remove(tag.id);
         if (attempts.containsKey(tag.id) == true){
-          attempts.remove(tag.id);
+          attempts.update(tag.id, (value) => 0);
+        }
+        if( deniedKey.contains(tag.id)== true){
+          deniedKey.remove(tag.id);
         }
         log.add(tag.id + ": tag enabled");
         return 1;