diff --git a/prizetap/validators.py b/prizetap/validators.py
index 7b9c998f..e2883086 100644
--- a/prizetap/validators.py
+++ b/prizetap/validators.py
@@ -4,18 +4,18 @@
 from authentication.models import UserProfile
 from .models import RaffleEntry, Raffle
 from .constraints import *
+from faucet.constraints import OptimismClaimingGasConstraint
+
 
 class RaffleEnrollmentValidator:
     def __init__(self, *args, **kwargs):
-        self.user_profile: UserProfile = kwargs['user_profile']
-        self.raffle: Raffle = kwargs['raffle']
+        self.user_profile: UserProfile = kwargs["user_profile"]
+        self.raffle: Raffle = kwargs["raffle"]
 
     def can_enroll_in_raffle(self):
         if not self.raffle.is_claimable:
-            raise PermissionDenied(
-                "Can't enroll in this raffle"
-            )
-        
+            raise PermissionDenied("Can't enroll in this raffle")
+
     def check_user_constraints(self):
         try:
             param_values = json.loads(self.raffle.constraint_params)
@@ -29,13 +29,12 @@ def check_user_constraints(self):
             except KeyError:
                 pass
             if not constraint.is_observed():
-                raise PermissionDenied(
-                    constraint.response
-                )
+                raise PermissionDenied(constraint.response)
 
     def check_user_has_wallet(self):
         if not self.user_profile.wallets.filter(
-            wallet_type=self.raffle.chain.chain_type).exists():
+            wallet_type=self.raffle.chain.chain_type
+        ).exists():
             raise PermissionDenied(
                 f"You have not connected an {self.raffle.chain.chain_type} wallet to your account"
             )
@@ -47,23 +46,21 @@ def is_valid(self, data):
 
         self.check_user_has_wallet()
 
+
 class SetRaffleEntryTxValidator:
-    
     def __init__(self, *args, **kwargs):
-        self.user_profile: UserProfile = kwargs['user_profile']
-        self.raffle_entry: RaffleEntry = kwargs['raffle_entry']
+        self.user_profile: UserProfile = kwargs["user_profile"]
+        self.raffle_entry: RaffleEntry = kwargs["raffle_entry"]
 
     def is_owner_of_raffle_entry(self):
         if not self.raffle_entry.user_profile == self.user_profile:
             raise PermissionDenied(
                 "You don't have permission to update this raffle entry"
             )
-        
+
     def is_tx_empty(self):
         if self.raffle_entry.tx_hash:
-            raise PermissionDenied(
-                "This raffle entry is already updated"
-            )
+            raise PermissionDenied("This raffle entry is already updated")
 
     def is_valid(self, data):
         self.is_owner_of_raffle_entry()
@@ -71,26 +68,20 @@ def is_valid(self, data):
 
         tx_hash = data.get("tx_hash", None)
         if not tx_hash or len(tx_hash) != 66:
-            raise PermissionDenied(
-                "Tx hash is not valid"
-            )
+            raise PermissionDenied("Tx hash is not valid")
+
 
 class SetClaimingPrizeTxValidator:
-    
     def __init__(self, *args, **kwargs):
-        self.raffle_entry: RaffleEntry = kwargs['raffle_entry']
-        
+        self.raffle_entry: RaffleEntry = kwargs["raffle_entry"]
+
     def is_winner(self):
         if not self.raffle_entry.is_winner:
-            raise PermissionDenied(
-                "You are not the raffle winner"
-            )
-        
+            raise PermissionDenied("You are not the raffle winner")
+
     def is_tx_empty(self):
         if self.raffle_entry.claiming_prize_tx:
-            raise PermissionDenied(
-                "The tx_hash is already set"
-            )
+            raise PermissionDenied("The tx_hash is already set")
 
     def is_valid(self, data):
         self.is_winner()
@@ -98,27 +89,21 @@ def is_valid(self, data):
 
         tx_hash = data.get("tx_hash", None)
         if not tx_hash or len(tx_hash) != 66:
-            raise PermissionDenied(
-                "Tx hash is not valid"
-            )
+            raise PermissionDenied("Tx hash is not valid")
+
 
 class SetRaffleTxValidator:
-    
     def __init__(self, *args, **kwargs):
-        self.user_profile: UserProfile = kwargs['user_profile']
-        self.raffle: Raffle = kwargs['raffle']
+        self.user_profile: UserProfile = kwargs["user_profile"]
+        self.raffle: Raffle = kwargs["raffle"]
 
     def is_owner_of_raffle(self):
         if not self.raffle.creator_profile == self.user_profile:
-            raise PermissionDenied(
-                "You don't have permission to update this raffle"
-            )
-        
+            raise PermissionDenied("You don't have permission to update this raffle")
+
     def is_tx_empty(self):
         if self.raffle.tx_hash:
-            raise PermissionDenied(
-                "This raffle is already updated"
-            )
+            raise PermissionDenied("This raffle is already updated")
 
     def is_valid(self, data):
         self.is_owner_of_raffle()
@@ -126,6 +111,4 @@ def is_valid(self, data):
 
         tx_hash = data.get("tx_hash", None)
         if not tx_hash or len(tx_hash) != 66:
-            raise PermissionDenied(
-                "Tx hash is not valid"
-            )
\ No newline at end of file
+            raise PermissionDenied("Tx hash is not valid")