Bitcoin Blockreward Estimation

countdown.py

#!/usr/bin/env python
# Copyright Harald Schilly <harald.schil.ly>
# License: Apache 2.0
# Hint: run it periodically via: watch -d -n 30 python countdown.py
#       (sorry blockexplorer ...)

# which halfing? 1, 2, ...
nb_halfing = 2
quot = 2 ** nb_halfing
reward = 50. / quot

from urllib2 import urlopen
from datetime import datetime, timedelta

bc=int(urlopen("http://blockexplorer.com/q/getblockcount").read())
iv=float(urlopen("http://blockexplorer.com/q/interval").read())

# smoothing
iv = (iv + 600) / 2.0

half = 210000 * nb_halfing
eta = (half - bc) * iv
utc_time  = datetime.utcnow()
brh_local = datetime.now() + timedelta(seconds = eta)
brh_utc   = utc_time + timedelta(seconds = eta)


print 'estim. for %.2f BTC/Block' % reward
print 'target block height:  %s' % half
print 'current block height: %s' % bc
print 'remaining:            %s' % (half - bc)
print 'current time (UTC)    %s' % utc_time.isoformat()
print 'ETA (local):          %s' % brh_local.isoformat()
print 'ETA (UTC):            %s' % brh_utc.isoformat()
print 'time left:            %s [s] = %.1f [min] = %.1f [h] = %.1f [d]' % (eta, eta/60, eta/60**2, eta/60**2/24)