mirror of
git://holbrook.no/erc20-demurrage-token
synced 2024-11-15 14:06:45 +01:00
68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
# standard imports
|
|
import logging
|
|
import datetime
|
|
import math
|
|
|
|
# eternal imports
|
|
from chainlib.eth.constant import ZERO_ADDRESS
|
|
|
|
# local imports
|
|
from .token import DemurrageToken
|
|
|
|
logg = logging.getLogger(__name__)
|
|
|
|
|
|
class DemurrageCalculator:
|
|
|
|
def __init__(self, interest_f_minute):
|
|
|
|
self.r_min = interest_f_minute
|
|
self.r_hour = 1 - ((1 -self.r_min) ** 60)
|
|
self.r_day = 1 - ((1 -self.r_hour) ** 24)
|
|
#self.r_week = interest_f_day ** 7
|
|
logg.info('demurrage calculator set with min {:.32f} hour {:.32f} day {:.32f}'.format(self.r_min, self.r_hour, self.r_day))
|
|
|
|
|
|
def amount_since(self, amount, timestamp):
|
|
delta = datetime.datetime.utcnow() - datetime.datetime.fromtimestamp(timestamp)
|
|
adjusted_amount = amount * ((1 - self.r_day) ** (delta.days))
|
|
logg.debug('adjusted for {} days {} -> {}'.format(delta.days, amount, adjusted_amount))
|
|
|
|
remainder = delta.seconds
|
|
remainder_hours = math.floor(remainder / (60 * 60))
|
|
adjusted_delta = adjusted_amount * ((1 - self.r_hour) ** remainder_hours)
|
|
adjusted_amount -= (adjusted_amount - adjusted_delta)
|
|
logg.debug('adjusted for {} hours {} -> {} delta {}'.format(remainder_hours, amount, adjusted_amount, adjusted_delta))
|
|
|
|
remainder -= (remainder_hours * (60 * 60))
|
|
remainder_minutes = math.floor(remainder / 60)
|
|
adjusted_delta = adjusted_amount * ((1 - self.r_min) ** remainder_minutes)
|
|
adjusted_amount -= (adjusted_amount - adjusted_delta)
|
|
logg.debug('adjusted for {} minutes {} -> {} delta {}'.format(remainder_minutes, amount, adjusted_amount, adjusted_delta))
|
|
|
|
return adjusted_amount
|
|
|
|
|
|
def amount_since_slow(self, amount, timestamp):
|
|
delta = datetime.datetime.utcnow() - datetime.datetime.fromtimestamp(timestamp)
|
|
remainder_minutes = math.floor(delta.total_seconds() / 60)
|
|
adjusted_amount = amount * ((1 - self.r_min) ** remainder_minutes)
|
|
logg.debug('adjusted for {} minutes {} -> {} delta {}'.format(remainder_minutes, amount, adjusted_amount, amount - adjusted_amount))
|
|
|
|
return adjusted_amount
|
|
|
|
|
|
@staticmethod
|
|
def from_contract(rpc, chain_spec, contract_address, sender_address=ZERO_ADDRESS):
|
|
c = DemurrageToken(chain_spec)
|
|
o = c.tax_level(contract_address, sender_address=sender_address)
|
|
r = rpc.do(o)
|
|
taxlevel_i = c.parse_tax_level(r)
|
|
|
|
o = c.resolution_factor(contract_address, sender_address=sender_address)
|
|
r = rpc.do(o)
|
|
divider = c.parse_resolution_factor(r)
|
|
logg.debug('taxlevel {} f {}'.format(taxlevel_i, divider))
|
|
taxlevel_f = taxlevel_i / divider
|
|
return DemurrageCalculator(taxlevel_f)
|