2
host = hostname of the machine where you run this program
3
port = choose a port number
4
password = choose a password
7
database = database filename
10
xpub = the master public key of your wallet
11
wallet_path = path where the script will save the wallet
14
received = URL where we POST json data when payment has been received
15
expired = URL where we POST json data if payment has expired
16
password = password sent in the json data, for authentication