diff --git a/fpc.nim b/fpc.nim
new file mode 100644
index 0000000..80a5823
--- /dev/null
+++ b/fpc.nim
@@ -0,0 +1,56 @@
+import macros
+import nimpy
+
+macro eval(value: static[string]): untyped =
+  result = parseStmt value
+
+# let e: int = 5
+# echo eval("1 + e")
+
+type Contract = object
+  employee: int
+  start_date: string
+  end_date: string
+  salary: float
+
+# type
+#   WageType = tuple[id: int, name: string]
+
+
+
+type
+  WageType = object
+    id: int
+    name: string
+    sequence: int
+    definition: string
+    # unit_price_formula: void
+    # expense_formula: void
+    # salary_constitute: bool
+    # uom: int
+    # type_concept: string
+    # concepts_salary: @[]
+    # adjust_days_worked: bool
+
+type Payroll = object
+  employee: int
+  start_date: string
+  end_date: string
+  # salary: float
+  # lines: @[PayrollLine]
+
+
+# proc computePayroll(wages: seq[WageType]): int {.exportpy.} =
+
+proc computePayroll(wages: seq[WageType]): string {.exportpy.} =
+    # echo wage.name
+    # for waget in wages:
+    #   echo waget.name
+    #   echo waget.sequence
+    # var mat = Payroll(
+    #   employee: 456,
+    #   start_date: "2023-01-01",
+    #   end_date: "2023-01-31"
+    # )
+    let mat: string = wage.name
+    return mat
diff --git a/payroll.py b/payroll.py
index 1452f66..84342af 100644
--- a/payroll.py
+++ b/payroll.py
@@ -31,6 +31,10 @@ from .constants import (
     FIELDS_AMOUNT, EXTRAS, SHEET_SUMABLES, LIM_PERCENT_DEDUCTIBLE,
 )
 
+# Nimporter is required for impot Nim
+import nimporter
+import trytond.modules.staff_payroll_co.fpc as fpc # Nim imports!
+
 STATES = {'readonly': (Eval('state') != 'draft')}
 
 _ZERO = Decimal('0.0')
@@ -276,7 +280,6 @@ class Payroll(metaclass=PoolMeta):
     def get_days(self, start, end, wage_adjust_days_worked=None):
         adjust = 1
         # adjust_days_worked = False
-        print("este contrato.--------", self.contract.id)
         adjust_days_worked = self.contract.position.adjust_days_worked if self.contract else true
         # print('this is', adj)
         # if self.contract and self.contract.position:
@@ -1721,6 +1724,26 @@ class PayrollGroupStart(metaclass=PoolMeta):
 class PayrollGroup(metaclass=PoolMeta):
     __name__ = 'staff.payroll_group'
 
+    def transition_open_nim(self):
+        Payroll = Pool().get('staff.payroll')
+        Wage = Pool().get('staff.wage_type')
+        fields_names = [
+            'name', 'sequence', 'definition', 'unit_price_formula',
+            'unit_price_formula', 'salary_constitute', 'expense_formula',
+            'type_concept'
+        ]
+        wages = Wage.search_read([], fields_names=fields_names)
+        print('wages ===================', type(wages))
+
+        wage = {
+            "id" : 3,
+            "name" : "User"
+        }
+        res = fpc.computePayroll(wage)
+
+        print("Running in Nim....", res)
+        return 'end'
+
     def transition_open_(self):
         if self.start.task:
             Employee = Pool().get('company.employee')
diff --git a/setup.py b/setup.py
index dcabafa..89f64f6 100644
--- a/setup.py
+++ b/setup.py
@@ -76,7 +76,7 @@ setup(name=name,
         ],
     package_data={
         'trytond.modules.%s' % MODULE: (info.get('xml', [])
-            + ['tryton.cfg', 'view/*.xml', 'locale/*.po',
+            + ['tryton.cfg', 'view/*.xml', 'locale/*.po', '*.nim',
             '*.ods', '*.csv', '*.odt', '*.fodt', '*.fods']),
         },
     classifiers=[