Add python demurrage calculator
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python/erc20_demurrage_token/demurrage.py
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38
python/erc20_demurrage_token/demurrage.py
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@ -0,0 +1,38 @@
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#
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import logging
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import datetime
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import math
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logging.basicConfig(level=logging.DEBUG)
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logg = logging.getLogger()
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class DemurrageCalculator:
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def __init__(self, interest_f_minute):
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self.r_min = interest_f_minute
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self.r_hour = 1 - ((1 -self.r_min) ** 60)
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self.r_day = 1 - ((1 -self.r_hour) ** 24)
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#self.r_week = interest_f_day ** 7
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logg.info('demurrage calculator set with min {:.32f} hour {:.32f} day {:.32f}'.format(self.r_min, self.r_hour, self.r_day))
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def amount_since(self, amount, timestamp):
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delta = datetime.datetime.utcnow() - datetime.datetime.fromtimestamp(timestamp)
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adjusted_amount = amount * ((1 - self.r_day) ** (delta.days))
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logg.debug('adjusted for {} days {} -> {}'.format(delta.days, amount, adjusted_amount))
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remainder = delta.seconds
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remainder_hours = math.floor(remainder / (60 * 60))
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adjusted_delta = adjusted_amount * ((1 - self.r_hour) ** remainder_hours)
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adjusted_amount -= (adjusted_amount - adjusted_delta)
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logg.debug('adjusted for {} hours {} -> {} delta {}'.format(remainder_hours, amount, adjusted_amount, adjusted_delta))
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remainder -= (remainder_hours * (60 * 60))
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remainder_minutes = math.floor(remainder / 60)
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adjusted_delta = adjusted_amount * ((1 - self.r_min) ** remainder_minutes)
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adjusted_amount -= (adjusted_amount - adjusted_delta)
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logg.debug('adjusted for {} hours {} -> {} delta {}'.format(remainder_minutes, amount, adjusted_amount, adjusted_delta))
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return adjusted_amount
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@ -4,7 +4,7 @@ version = 0.0.2a1
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description = ERC20 token with redistributed continual demurrage
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author = Louis Holbrook
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author_email = dev@holbrook.no
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url = https://gitlab.com/grassrootseconomics/sarafu-token
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url = https://gitlab.com/ccicnet/erc20-demurrage-token
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keywords =
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ethereum
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blockchain
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@ -1,33 +0,0 @@
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#!/bin/bash
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set -e
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export PYTHONPATH=.
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#modes=(MultiNocap MultiCap SingleCap SingleNocap)
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modes=(SingleCap SingleNocap) # other contracts need to be updted
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for m in ${modes[@]}; do
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_basic.py
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_growth.py
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_amounts.py
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_single.py
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done
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modes=(SingleCap) # other contracts need to be updted
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for m in ${modes[@]}; do
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_period.py
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution_unit.py
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done
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modes=(MultiCap SingleCap)
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for m in ${modes[@]}; do
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ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_cap.py
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done
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#modes=(MultiCap MultiNocap)
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#for m in ${modes[@]}; do
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# ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_remainder.py
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# ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution.py
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#done
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set +e
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23
python/tests/test_demurrage_ext.py
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python/tests/test_demurrage_ext.py
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# standard imports
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import datetime
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import unittest
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# local imports
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from erc20_demurrage_token.demurrage import DemurrageCalculator
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# test imports
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from tests.base import TestDemurrage
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class TestEmulate(TestDemurrage):
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def test_amount_since(self):
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d = datetime.datetime.utcnow() - datetime.timedelta(seconds=29, hours=5, minutes=3, days=4)
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c = DemurrageCalculator(0.00000050105908373373)
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a = c.amount_since(100, d.timestamp())
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self.assert_within_lower(a, 99.69667, 0.1)
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if __name__ == '__main__':
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unittest.main()
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