mmgen/mmgen-wallet
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halving-calculator.py: a few minor fixes

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The MMGen Project 2020-05-12 16:37:59 +00:00
commit bfc40fce4d
Signed by: mmgen
GPG key ID: 3F8B1861E32B7DA2
2 changed files with 8 additions and 9 deletions
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2
README.md
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@ -137,8 +137,6 @@ Linux, Armbian, Raspbian, Windows/MSYS2
### Download/Install
> #### [Install a prebuilt bootable image (MMGenLive) on a USB stick][8]
> #### [Install from source on Microsoft Windows][1]
> #### [Install from source on Debian, Ubuntu, Raspbian or Armbian Linux][2]

15
examples/halving-calculator.py
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@ -13,7 +13,6 @@ from mmgen.common import *
opts.init({ 'text': { 'desc':'', 'usage':'', 'options':'' }})
HalvingInterval = 210000 # src/chainparams.cpp
sample_size = 6 * 24 # about a day's worth of blocks
def date(t):
return '{}-{:02}-{:02} {:02}:{:02}:{:02}'.format(*time.gmtime(t)[:6])
@ -23,7 +22,7 @@ def dhms(t):
def time_diff_warning(t_diff):
if abs(t_diff) > 60*60:
print('Warning: block tip time is {} {} current time!'.format(
print('Warning: block tip time is {} {} clock time!'.format(
dhms(abs(t_diff)),
('behind','ahead of')[t_diff<0]))
@ -31,24 +30,26 @@ async def main():
from mmgen.rpc import rpc_init
c = await rpc_init()
tip = await c.call('getblockcount')
remaining = HalvingInterval - tip % HalvingInterval
sample_size = max(remaining,144)
# aiohttp backend will perform these two calls concurrently:
cur,old = await c.gathered_call('getblockstats',((tip,),(tip - sample_size,)))
time_diff_warning(int(time.time() - cur['time']))
clock_time = int(time.time())
time_diff_warning(clock_time - cur['time'])
remaining = HalvingInterval - tip % HalvingInterval
bdr = (cur['time'] - old['time']) / sample_size
t_rem = remaining * int(bdr)
sub = cur['subsidy'] * Decimal("0.00000001")
sub = cur['subsidy'] * Decimal('0.00000001')
print(f'Current block: {tip}')
print(f'Next halving block: {tip + remaining}')
print(f'Blocks until halving: {remaining}')
print('Current block subsidy: {} BTC'.format(str(sub).rstrip('0')))
print(f'Current block discovery rate (over last {sample_size} blocks): {bdr/60:0.1f} minutes')
print(f'Current clock time (UTC): {date(time.time())}')
print(f'Current clock time (UTC): {date(clock_time)}')
print(f'Est. halving date (UTC): {date(cur["time"] + t_rem)}')
print(f'Est. time until halving: {dhms(cur["time"] + t_rem - int(time.time()))}')
print(f'Est. time until halving: {dhms(cur["time"] + t_rem - clock_time)}')
run_session(main(),do_rpc_init=False)