research/casper4/griefing_one_third_offline_...

36 lines
1.0 KiB
Python
Raw Normal View History

2017-05-30 12:36:26 +00:00
import math
# Length of an epoch in seconds
epoch_len = 1400
# In-protocol penalization parameter
increment = 0.00002
# Parameters
NFP = 0
NCP = 3
NCCP = 3
NPP = 3
NPCP = 3
def sim_offline(p):
online, offline = 1-p, p
for i in range(1, 999999):
# Lost by offline validators
2017-06-11 08:08:11 +00:00
offline_loss = NFP + NPP + NPCP * (offline / (online + offline))
2017-05-30 12:36:26 +00:00
# Lost by online validators
2017-06-11 08:08:11 +00:00
online_loss = NFP + NPCP * (offline / (online + offline))
2017-05-30 12:36:26 +00:00
online *= 1 - increment * math.log(i) * online_loss
offline *= 1 - increment * math.log(i) * offline_loss
if i % 100 == 0 or online >= 2 * offline:
2017-06-11 08:08:11 +00:00
print("%d epochs (%.2f days): online %.4f offline %.4f" %
2017-05-30 12:36:26 +00:00
(i, epoch_len * i / 86400, online, offline))
# If the remaining validators can commit, break
if online >= 2 * offline:
2017-06-11 08:08:11 +00:00
return (1-p, online, epoch_len * i / 86400)
2017-05-30 12:36:26 +00:00
sim_offline(0.4)
2017-06-11 08:08:11 +00:00
#results = [sim_offline(i * 0.01) for i in range(34, 100)]
#for col in results:
# print("%.4f, %.4f, %.4f" % col)