diff --git a/blockchain_integration/pi_network/wallet/pi_wallet/services/pi_api_service.py b/blockchain_integration/pi_network/wallet/pi_wallet/services/pi_api_service.py
index 4fc6e4d0d..9c68b8e47 100644
--- a/blockchain_integration/pi_network/wallet/pi_wallet/services/pi_api_service.py
+++ b/blockchain_integration/pi_network/wallet/pi_wallet/services/pi_api_service.py
@@ -1,7 +1,10 @@
 import requests
+
 from .exceptions.pi_network_exceptions import PiNetworkApiException
 
+
 class PiApiService:
+
     def __init__(self, api_endpoint, api_key, api_secret):
         self.api_endpoint = api_endpoint
         self.api_key = api_key
@@ -9,30 +12,34 @@ def __init__(self, api_endpoint, api_key, api_secret):
 
     def get_blockchain_info(self):
         headers = {
-            'Content-Type': 'application/json',
-            'Authorization': f'Bearer {self.api_key}'
+            "Content-Type": "application/json",
+            "Authorization": f"Bearer {self.api_key}",
         }
-        response = requests.get(f'{self.api_endpoint}/blockchain', headers=headers)
+        response = requests.get(f"{self.api_endpoint}/blockchain", headers=headers)
         if response.status_code != 200:
             raise PiNetworkApiException(response.status_code, response.text)
         return response.json()
 
     def broadcast_transaction(self, transaction):
         headers = {
-            'Content-Type': 'application/json',
-            'Authorization': f'Bearer {self.api_key}'
+            "Content-Type": "application/json",
+            "Authorization": f"Bearer {self.api_key}",
         }
-        response = requests.post(f'{self.api_endpoint}/transaction', json=transaction, headers=headers)
+        response = requests.post(
+            f"{self.api_endpoint}/transaction", json=transaction, headers=headers
+        )
         if response.status_code != 201:
             raise PiNetworkApiException(response.status_code, response.text)
         return response.json()
 
     def verify_transaction(self, transaction):
         headers = {
-            'Content-Type': 'application/json',
-            'Authorization': f'Bearer {self.api_key}'
+            "Content-Type": "application/json",
+            "Authorization": f"Bearer {self.api_key}",
         }
-        response = requests.get(f'{self.api_endpoint}/transaction/{transaction["hash"]}', headers=headers)
+        response = requests.get(
+            f'{self.api_endpoint}/transaction/{transaction["hash"]}', headers=headers
+        )
         if response.status_code != 200:
             raise PiNetworkApiException(response.status_code, response.text)
         return response.json()