diff --git a/src/blackbox/workflow.py b/src/blackbox/workflow.py
index e0cdc68..5822fca 100644
--- a/src/blackbox/workflow.py
+++ b/src/blackbox/workflow.py
@@ -31,6 +31,9 @@ def get_map_value(d: dict, key):
     if value is list:
         return value
     return Literal(value)
+def get_map_int(d: dict, key):
+    value = d.get(key)
+    return Literal(int(value))
 
 @singleton
 class Workflow(Blackbox):
@@ -38,6 +41,7 @@ class Workflow(Blackbox):
     @inject
     def __init__(self, sum: Sum) -> None:
         self.sum_blackbox = sum
+        self.cost = 0
     
     def __call__(self, *args, **kwargs):
         return self.processing(*args, **kwargs)
@@ -48,6 +52,17 @@ class Workflow(Blackbox):
     def sum(self, *args, **kwargs):
         return Literal(self.sum_blackbox.processing(*args, **kwargs))
     
+    def get_cost(self):
+        return self.cost
+    
+    def blackbox_example(self):
+        self.cost_increase(10);
+        return Literal("Blackbox result")
+    
+    def cost_increase(self, cost):
+        self.cost+=cost
+        return self.cost
+    
     async def processing(self, *args, **kwargs):
         request: Request = args[0]
         json = await request.json()
@@ -79,6 +94,9 @@ class Workflow(Blackbox):
                 "sum": self.sum,
                 "read_binay": read_binay,
                 "jsonfiy": jsonfiy,
+                "get_map_int": get_map_int,
+                "blackbox_example": self.blackbox_example,
+                "get_cost": self.get_cost,
             }
         )
         ast = program_parser(t)