diff --git a/simpleCoin/miner.py b/simpleCoin/miner.py
index 3532eaa..491b925 100644
--- a/simpleCoin/miner.py
+++ b/simpleCoin/miner.py
@@ -174,9 +174,14 @@ def consensus(blockchain):
 
 
 def validate_blockchain(block):
-    """Validate the submitted chain. If hashes are not correct, return false
+    """Validate the submitted chain. If hashes are not correct, return False
     block(str): json
     """
+
+    for i in range(len(block)-1):
+        if not block[i].hash_block() == block[i+1].previous_hash:
+            return False
+
     return True
 
 
diff --git a/simpleCoin/wallet.py b/simpleCoin/wallet.py
index 859ba03..530530e 100644
--- a/simpleCoin/wallet.py
+++ b/simpleCoin/wallet.py
@@ -22,6 +22,7 @@
 import time
 import base64
 import ecdsa
+import json
 
 
 def wallet():
@@ -92,11 +93,11 @@ def check_transactions():
     """
     try:
         res = requests.get('http://localhost:5000/blocks')
-        print(res.text)
+        print(json.dumps(res.json(),indent=2))
     except requests.ConnectionError:
         print('Connection error. Make sure that you have run miner.py in another terminal.')
 
-    
+
 
 def generate_ECDSA_keys():
     """This function takes care of creating your private and public (your address) keys.