new_contents: import sqlite3
  
  __author__ = 'sammoth'
  
  
  def build():
      """
      Build the necessary tables in the database
      use the 'IF NOT EXISTS' clause to allow for repeated running without barfing
      :return:
      """
      conn = sqlite3.connect('pool.db')
      c = conn.cursor()
      # create the users table
      c.execute("CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, user TEXT, "
                "address TEXT, exchange TEXT, unit TEXT)")
      # create the orders table
      c.execute("CREATE TABLE IF NOT EXISTS orders (id INTEGER PRIMARY KEY, user TEXT, "
                "tier TEXT, order_id TEXT, order_amount NUMBER, order_type TEXT, exchange "
                "TEXT, unit TEXT)")
      # create the credits table
      c.execute("CREATE TABLE IF NOT EXISTS credits (id INTEGER PRIMARY KEY, time NUMBER, "
                "user TEXT, exchange TEXT, unit TEXT, tier TEXT, side TEXT, provided "
                "NUMBER, total NUMBER, percentage NUMBER, reward NUMBER, paid INTEGER)")
      conn.commit()
      conn.close()
      return
  
subject: add database module