Update app.py

app.py

@@ -28,11 +28,11 @@ api = HfApi(token=token_self)
 
 ########################  BLOCKCHAIN START  ###############################
 
-def bc_transactions(block):
+def bc_transactions(block,prev_block=None):
     #mes, out = issue_tokens(sender,recipient,amount)
     
     try:
-        blockchain.new_transaction(block)
+        blockchain.new_transaction(block,prev_block=None)
         message = "Transaction Added to Pool"
         data = pd.DataFrame(blockchain.trans_data_out)
     except Exception as e: