new file: mmnode-halving-calculator.py
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mmnode-halving-calculator.py
Executable file
182
mmnode-halving-calculator.py
Executable file
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#!/usr/bin/env python3
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#
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# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
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# Copyright (C)2013-2020 The MMGen Project <mmgen@tuta.io>
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#
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# This program is free software: you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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mmnode-halving-calculator: Estimate date(s) of future block subsidy halving(s)
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"""
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import time
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from decimal import Decimal
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from mmgen.common import *
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bdr_proj = 9.95
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opts.init({
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'sets': [('mined',True,'list',True)],
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'text': {
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'desc': 'Estimate date(s) of future block subsidy halving(s)',
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'usage':'[opts]',
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'options': f"""
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-h, --help Print this help message
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--, --longhelp Print help message for long options (common options)
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-l, --list List historical and projected halvings
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-m, --mined Same as above, plus list coins mined
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-r, --bdr-proj=I Block discovery interval for projected halvings (default:
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{bdr_proj:.5f} min)
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-s, --sample-size=N Block range to calculate block discovery interval for next
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halving estimate (default: dynamically calculated)
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""" }
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})
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if opt.bdr_proj:
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bdr_proj = float(opt.bdr_proj)
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def date(t):
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return '{}-{:02}-{:02} {:02}:{:02}:{:02}'.format(*time.gmtime(t)[:6])
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def dhms(t):
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t,neg = (-t,'-') if t < 0 else (t,' ')
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return f'{neg}{t//60//60//24} days, {t//60//60%24:02}:{t//60%60:02}:{t%60:02} h/m/s'
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def time_diff_warning(t_diff):
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if abs(t_diff) > 60*60:
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print('Warning: block tip time is {} {} clock time!'.format(
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dhms(abs(t_diff)),
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('behind','ahead of')[t_diff<0]))
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async def main():
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from mmgen.protocol import init_proto_from_opts
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proto = init_proto_from_opts()
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from mmgen.rpc import rpc_init
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c = await rpc_init(proto)
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tip = await c.call('getblockcount')
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assert tip > 1, 'block tip must be > 1'
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remaining = proto.halving_interval - tip % proto.halving_interval
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sample_size = int(opt.sample_size) if opt.sample_size else min(tip-1,max(remaining,144))
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cur,old = await c.gathered_call('getblockstats',((tip,),(tip - sample_size,)))
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clock_time = int(time.time())
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time_diff_warning(clock_time - cur['time'])
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bdr = (cur['time'] - old['time']) / sample_size
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t_rem = remaining * int(bdr)
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t_next = cur['time'] + t_rem
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if proto.name == 'BitcoinCash':
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sub = proto.coin_amt(str(cur['subsidy']))
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else:
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sub = cur['subsidy'] * proto.coin_amt.min_coin_unit
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def print_current_stats():
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print(
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f'Current block: {tip:>7}\n'
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f'Next halving block: {tip + remaining:>7}\n'
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f'Halving interval: {proto.halving_interval:>7}\n'
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f'Blocks since last halving: {proto.halving_interval - remaining:>7}\n'
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f'Blocks until next halving: {remaining:>7}\n\n'
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f'Current block subsidy: {str(sub).rstrip("0")} {proto.coin}\n'
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f'Current block discovery interval (over last {sample_size} blocks): {bdr/60:0.2f} min\n\n'
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f'Current clock time (UTC): {date(clock_time)}\n'
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f'Est. halving date (UTC): {date(t_next)}\n'
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f'Est. time until halving: {dhms(cur["time"] + t_rem - clock_time)}'
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)
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async def print_halvings():
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halving_blocknums = [i*proto.halving_interval for i in range(proto.max_halvings+1)][1:]
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hist_halvings = await c.gathered_call('getblockstats',([(n,) for n in halving_blocknums if n <= tip]))
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halving_secs = bdr_proj * 60 * proto.halving_interval
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nhist = len(hist_halvings)
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nSubsidy = int(proto.start_subsidy / proto.coin_amt.min_coin_unit)
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block0_hash = await c.call('getblockhash',0)
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block0_date = (await c.call('getblock',block0_hash))['time']
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def gen_data():
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total_mined = 0
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date = block0_date
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for n,blk in enumerate(halving_blocknums):
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mined = (nSubsidy >> n) * proto.halving_interval
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if n == 0:
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mined -= nSubsidy # subtract unspendable genesis block subsidy
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total_mined += mined
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sub = nSubsidy >> n+1 if n+1 < proto.max_halvings else 0
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bdi = (
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(hist_halvings[n]['time'] - date) / (proto.halving_interval * 60) if n < nhist
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else bdr/60 if n == nhist
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else bdr_proj
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)
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date = (
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hist_halvings[n]['time'] if n < nhist
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else t_next + int((n - nhist) * halving_secs)
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)
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yield ( n, sub, blk, mined, total_mined, bdi, date )
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if sub == 0:
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break
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fs = (
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' {a:<7} {b:>8} {c:19}{d:2} {e:10} {f}',
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' {a:<7} {b:>8} {c:19}{d:2} {e:10} {f:17} {g:17} {h}'
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)[bool(opt.mined)]
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print(
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f'Historical/Estimated/Projected Halvings ({proto.coin}):\n\n'
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+ f' Sample size for next halving estimate (E): {sample_size} blocks\n'
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+ f' Block discovery interval for projected halvings (P): {bdr_proj:.5f} minutes\n\n'
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+ fs.format(
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a = 'HALVING',
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b = 'BLOCK',
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c = 'DATE',
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d = '',
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e = f'BDI (min)',
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f = f'SUBSIDY ({proto.coin})',
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g = f'MINED ({proto.coin})',
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h = f'TOTAL MINED ({proto.coin})'
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)
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+ '\n'
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+ fs.format(
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a = '-' * 7,
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b = '-' * 8,
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c = '-' * 19,
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d = '-' * 2,
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e = '-' * 10,
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f = '-' * 13,
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g = '-' * 17,
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h = '-' * 17
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)
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+ '\n'
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+ '\n'.join(fs.format(
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a = n + 1,
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b = blk,
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c = date(t),
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d = ' P' if n > nhist else '' if n < nhist else ' E',
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e = f'{bdr:8.5f}',
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f = proto.coin_amt(sub,from_unit='satoshi').fmt(fs='2.8'),
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g = proto.coin_amt(mined,from_unit='satoshi').fmt(fs='8.8'),
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h = proto.coin_amt(total_mined,from_unit='satoshi').fmt(fs='8.8')
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) for n,sub,blk,mined,total_mined,bdr,t in gen_data())
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)
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if opt.list:
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await print_halvings()
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else:
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print_current_stats()
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run_session(main())
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