Update app.py

app.py

@@ -35,8 +35,8 @@ def generate_keys():
     file_out_pub.close()
 
     qr_link="test"
-    priv_key = stegan.conv_im("private_key.png",data=file_out_priv)
-    pub_key = stegan.conv_im("public_key.png",data=file_out_pub)
+    priv_key = stegan.conv_im("private_key.png",data=private_key)
+    pub_key = stegan.conv_im("public_key.png",data=public_key)
     hash_1 = calculate_hash(public_key, hash_function="sha256")
     hash_2 = calculate_hash(hash_1, hash_function="ripemd160")
     address = base58.b58encode(hash_2)