diff --git a/driveshare_graph/farmer_summary.py b/driveshare_graph/farmer_summary.py
index c52c886..cc7eb71 100644
--- a/driveshare_graph/farmer_summary.py
+++ b/driveshare_graph/farmer_summary.py
@@ -10,6 +10,9 @@
 import os
 import simplejson
 sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
+from pycoin.encoding import a2b_hashed_base58
+from binascii import hexlify
+
 
 INDIVIDUAL_MAX_HEIGHT = 199999
 SECONDS_IN_DAY = 86400
@@ -43,6 +46,14 @@ def init_table(conn, cursor, collection):
 
 def update_table(conn, cursor, collection): # pragma: no cover
     """Updates the summaries table if there is new data in collection."""
+    cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='summaries'")
+    if len(cursor.fetchall()) == 0:
+        create_summary_table(conn, cursor)
+
+    cursor.execute("SELECT count(date) FROM summaries")
+    if cursor.fetchone()[0] == 0:
+        init_table(conn, cursor, collection)
+
     cursor.execute('SELECT MAX(date) FROM summaries')
     date = cursor.fetchone()[0]
     max_date = dt.datetime.strptime(date,  '%Y-%m-%d %H:%M:%S')
@@ -73,7 +84,10 @@ def create_daily_summary(conn, cursor, collection, date):
     for doc in collection.find({'time': {'$gte': date, '$lt': next_date}}):
         doc_time = time.mktime(doc['time'].timetuple())
         for farmer in doc['farmers']:
-            auth_address = farmer['nodeid']
+            if 'nodeid' in farmer:
+                auth_address = farmer['nodeid']
+            else:
+                auth_address = hexlify(a2b_hashed_base58(farmer['btc_addr'])[1:])
             if (auth_address in first_dates):
                 if last_dates[auth_address] == previous_time:
                     uptimes[auth_address] += doc_time - previous_time
@@ -150,6 +164,8 @@ def average_height(nodeid, first_date, last_date, collection):
     height_array = []
     for doc in collection.aggregate(pipeline):
         height_array.append(doc['farmers']['height'])
+    if len(height_array) == 0:
+        return 0
     return sum(height_array)/len(height_array)
 
 
diff --git a/driveshare_graph/update_summary.py b/driveshare_graph/update_summary.py
index e03b1cb..a408e97 100644
--- a/driveshare_graph/update_summary.py
+++ b/driveshare_graph/update_summary.py
@@ -1,6 +1,5 @@
 import farmer_summary
 import sqlite3
-import datetime
 from pymongo import MongoClient
 from time import sleep
 
@@ -10,8 +9,6 @@
     cursor = conn.cursor()
     client = MongoClient('localhost', 27017)
     collection = client['GroupB']['farmers']
-    # farmer_summary.create_summary_table(conn, cursor)
-    # farmer_summary.init_table(conn, cursor, collection)
     farmer_summary.update_table(conn, cursor, collection)
     sleep(86400)
     conn.close()
diff --git a/driveshare_graph/uptime.py b/driveshare_graph/uptime.py
index 1706b56..4e77e13 100644
--- a/driveshare_graph/uptime.py
+++ b/driveshare_graph/uptime.py
@@ -5,6 +5,8 @@
 import time
 import pygal
 from pygal.style import BlueStyle
+from pycoin.encoding import a2b_hashed_base58
+from binascii import hexlify
 
 connection = MongoClient('localhost', 27017)
 collection = connection['GroupB']['farmers']
@@ -41,7 +43,10 @@ def init_farmers_table(conn, cursor, collection):
     for doc in collection.find({}).sort('time', 1):
         doc_time = time.mktime(doc['time'].timetuple())
         for farmer in doc['farmers']:
-            nodeid = farmer['nodeid']
+            if 'nodeid' in farmer:
+                nodeid = farmer['nodeid']
+            else:
+                nodeid = hexlify(a2b_hashed_base58(farmer['btc_addr'])[1:])
             if (nodeid in first_dates):
                 if last_dates[nodeid] == previous_time:
                     uptimes[nodeid] += doc_time - previous_time
@@ -93,7 +98,15 @@ def update_farmers_table(conn, cursor, collection):
         conn: connection to sqlite3 database containing the table, farmers 
         cursor: conn's cursor
         collection: MongoDB collection of farmers 
-    """ 
+    """
+    cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='farmers'")
+    if len(cursor.fetchall()) == 0:
+        create_farmers_table(conn, cursor)
+
+    cursor.execute("SELECT count(last_date) FROM farmers")
+    if cursor.fetchone()[0] == 0:
+        init_farmers_table(conn, cursor, collection)
+ 
     cursor.execute('SELECT MAX(last_date) FROM farmers')
     last_time = int(cursor.fetchone()[0])
     last_date = dt_from_timestamp(last_time)
@@ -101,7 +114,10 @@ def update_farmers_table(conn, cursor, collection):
     for doc in collection.find({'time': {'$gt': last_date}}).sort('time', 1):
         doc_time = timestamp_from_dt(doc['time'])
         for farmer in doc['farmers']:
-            address = farmer['nodeid']
+            if 'nodeid' in farmer:
+                address = farmer['nodeid']
+            else:
+                address = hexlify(a2b_hashed_base58(farmer['btc_addr'])[1:])
             if address_in_db(cursor, address):
                 cursor.execute('''SELECT MAX(last_date) FROM farmers WHERE
                                   address=?''', (str(address),))
diff --git a/requirements.txt b/requirements.txt
index 189390d..63cb7bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ flask==0.10.1
 pymongo==3.0.3
 pygal==2.0.7
 simplejson==3.8.1
+pycoin==0.62