scripts/merchant.py

   1 #!/usr/bin/env python
   2 #
   3 # Electrum - lightweight Bitcoin client
   4 # Copyright (C) 2011 thomasv@gitorious
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  18
  19
  20 import time, thread, sys, socket, os
  21 import urllib2,json
  22 import MySQLdb as mdb
  23 import Queue
  24 from electrum import Wallet, Interface, WalletVerifier
  25
  26 import ConfigParser
  27 config = ConfigParser.ConfigParser()
  28 config.read("merchant.conf")
  29
  30 db_instance = config.get('db','instance')
  31 db_user = config.get('db','user')
  32 db_password = config.get('db','password')
  33 db_name = config.get('db','name')
  34
  35 electrum_server = config.get('electrum','server')
  36
  37 my_password = config.get('main','password')
  38 my_host = config.get('main','host')
  39 my_port = config.getint('main','port')
  40
  41 cb_received = config.get('callback','received')
  42 cb_expired = config.get('callback','expired')
  43 cb_password = config.get('callback','password')
  44
  45 wallet = Wallet()
  46 wallet.master_public_key = config.get('electrum','mpk')
  47
  48
  49
  50 omg_addresses = {}
  51
  52 def electrum_input_thread(in_queue):
  53     while True:
  54         addr, amount = in_queue.get(True,1000000000)
  55         if addr in omg_addresses:
  56             continue
  57         else:
  58             print "subscribing to ", addr
  59             omg_addresses[addr] = amount
  60             interface.send([('blockchain.address.subscribe',[addr])])
  61
  62
  63 def electrum_output_thread(out_queue):
  64     while True:
  65         r = interface.responses.get(True, 100000000000)
  66         method = r.get('method')
  67
  68         if method == 'blockchain.address.subscribe':
  69             addr = r.get('params')[0]
  70             interface.send([('blockchain.address.get_history',[addr])])
  71
  72         elif method == 'blockchain.address.get_history':
  73             addr = r.get('params')[0]
  74             #print "received history for", addr
  75             confirmed = unconfirmed = 0
  76             h = r.get('result')
  77             if h is None:
  78                 continue
  79
  80             for item in h:
  81                 tx_hash = item.get('tx_hash')
  82                 verifier.add(tx_hash)
  83
  84                 v = item['value']
  85                 if v<0: continue
  86                 if item['height']:
  87                     confirmed += v
  88                 else:
  89                     unconfirmed += v
  90
  91             s = (confirmed+unconfirmed)/1.e8
  92             print "balance for %s:"%addr, s
  93             amount = float(omg_addresses.get(addr))
  94             if s>=amount:
  95                 out_queue.put( ('payment',addr) )
  96
  97         elif method == 'blockchain.numblocks.subscribe':
  98             pass
  99
 100
 101 stopping = False
 102
 103 def do_stop():
 104     global stopping
 105     stopping = True
 106
 107 def do_create(conn):
 108     # creation
 109     cur = conn.cursor()
 110     cur.execute("CREATE TABLE electrum_payments (id INT PRIMARY KEY, address VARCHAR(40), amount FLOAT, received_at TIMESTAMP, expires_at TIMESTAMP, paid INT(1), processed INT(1));")
 111     conn.commit()
 112
 113 def process_request(i, amount, confirmations, expires_in, password):
 114     print "process_request", i, amount, confirmations, expires_in
 115     if password!=my_password:
 116         print "wrong password ", password
 117         return
 118     addr = wallet.get_new_address(i, 0)
 119     out_queue.put( ('request',(i,addr,amount,expires_in) ))
 120     return addr
 121
 122 def get_mpk():
 123     return wallet.master_public_key
 124
 125
 126 def server_thread(conn):
 127     from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer
 128     server = SimpleJSONRPCServer(( my_host, my_port))
 129     server.register_function(process_request, 'request')
 130     server.register_function(get_mpk, 'mpk')
 131     server.register_function(do_stop, 'stop')
 132     server.serve_forever()
 133
 134
 135 def handle_command(cmd):
 136     import jsonrpclib
 137     server = jsonrpclib.Server('http://%s:%d'%(my_host, my_port))
 138     try:
 139         if cmd == 'mpk':
 140             out = server.mpk()
 141         elif cmd == 'stop':
 142             out = server.stop()
 143         elif cmd == 'create':
 144             conn = mdb.connect(db_instance, db_user, db_password, db_name);
 145             do_create(conn)
 146             out = "ok"
 147         else:
 148             out = "unknown command"
 149     except socket.error:
 150         print "Server not running"
 151         return 1
 152
 153     print out
 154     return 0
 155
 156
 157 if __name__ == '__main__':
 158
 159     if len(sys.argv) > 1:
 160         ret = handle_command(sys.argv[1])
 161         sys.exit(ret)
 162
 163     print "using database", db_name
 164     conn = mdb.connect(db_instance, db_user, db_password, db_name);
 165
 166     interface = Interface({'server':"%s:%d:t"%(electrum_server, 50001)})
 167     interface.start()
 168     interface.send([('blockchain.numblocks.subscribe',[])])
 169
 170     verifier = WalletVerifier(interface, config)
 171     verifier.start()
 172
 173
 174     # this process detects when addresses have paid
 175     in_queue = Queue.Queue()
 176     out_queue = Queue.Queue()
 177     thread.start_new_thread(electrum_input_thread, (in_queue,))
 178     thread.start_new_thread(electrum_output_thread, (out_queue,))
 179
 180     thread.start_new_thread(server_thread, (conn,))
 181
 182
 183     while not stopping:
 184         cur = conn.cursor()
 185
 186         # get a list of addresses to watch
 187         cur.execute("SELECT address, amount FROM electrum_payments WHERE paid IS NULL;")
 188         data = cur.fetchall()
 189         for item in data:
 190             in_queue.put(item)
 191
 192         try:
 193             cmd, params = out_queue.get(True, 10)
 194         except Queue.Empty:
 195             cmd = ''
 196
 197         if cmd == 'payment':
 198             # set paid=1 for received payments
 199             print "received payment from", addr
 200             cur.execute("select id from electrum_payments where address='%s';"%addr)
 201             id = cur.fetchone()[0]
 202             cur.execute("update electrum_payments set paid=1 where id=%d;"%(id))
 203         elif cmd == 'request':
 204             i, addr, amount, hours = params
 205             sql = "INSERT INTO electrum_payments (id, address, amount, received_at, expires_at, paid, processed)"\
 206                 + " VALUES (%d, '%s', %f, CURRENT_TIMESTAMP, ADDTIME(CURRENT_TIMESTAMP, '0 %d:0:0'), NULL, NULL);"%(i, addr, amount, hours)
 207             cur.execute(sql)
 208
 209
 210         # set paid=0 for expired requests
 211         cur.execute("""UPDATE electrum_payments set paid=0 WHERE expires_at < CURRENT_TIMESTAMP and paid is NULL;""")
 212
 213         # do callback for addresses that received payment
 214         cur.execute("""SELECT id, address, paid from electrum_payments WHERE paid is not NULL and processed is NULL;""")
 215         data = cur.fetchall()
 216         for item in data:
 217             print "callback:", item
 218             id = int(item[0])
 219             address = item[1]
 220             paid = int(item[2])
 221             headers = {'content-type':'application/json'}
 222             data_json = { 'id':id, 'address':address, 'btc_auth':cb_password }
 223             data_json = json.dumps(data_json)
 224             url = cb_received if paid else cb_expired
 225             req = urllib2.Request(url, data_json, headers)
 226             try:
 227                 response_stream = urllib2.urlopen(req)
 228                 cur.execute("UPDATE electrum_payments SET processed=1 WHERE id=%d;"%(id))
 229             except urllib2.HTTPError:
 230                 print "cannot do callback", data_json
 231
 232         conn.commit()
 233
 234
 235     conn.close()
 236
 237