77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
# standard imports
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import logging
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# local imports
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from erc20_demurrage_token import DemurrageTokenSettings
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from erc20_demurrage_token.sim import DemurrageTokenSimulation
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logging.basicConfig(level=logging.WARNING)
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logg = logging.getLogger()
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decay_per_minute = 0.000050105908373373 # equals approx 2% per month
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# parameters for simulation object
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settings = DemurrageTokenSettings()
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settings.name = 'Simulated Demurrage Token'
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settings.symbol = 'SIM'
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settings.decimals = 6
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settings.demurrage_level = int(decay_per_minute*(10**40))
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settings.period_minutes = 10800 # 1 week in minutes
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chain = 'evm:foochain:42'
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cap = (10 ** 6) * (10 ** 12)
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# instantiate simulation
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sim = DemurrageTokenSimulation(chain, settings, redistribute=True, cap=cap, actors=10)
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# name the usual suspects
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alice = sim.actors[0]
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bob = sim.actors[1]
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carol = sim.actors[2]
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# mint and transfer (every single action advances one block, and one second in time)
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sim.mint(alice, sim.from_units(100)) # 10000000 tokens
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sim.mint(bob, sim.from_units(100))
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sim.transfer(alice, carol, sim.from_units(50))
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# check that balances have been updated
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assert sim.balance(alice) == sim.from_units(50)
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assert sim.balance(bob) == sim.from_units(100)
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assert sim.balance(carol) == sim.from_units(50)
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# advance to next redistribution period
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sim.next()
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# inspect balances
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print('alice balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(alice), sim.balance(alice, base=True)))
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print('bob balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(bob), sim.balance(bob, base=True)))
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print('carol balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(carol), sim.balance(carol, base=True)))
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print('sink balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(sim.sink_address), sim.balance(sim.sink_address, base=True)))
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# get times
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minutes = sim.get_minutes()
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start = sim.get_now()
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timestamp = sim.get_start()
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period = sim.get_period()
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print('start {} now {} period {} minutes passed {}'.format(start, timestamp, period, minutes))
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contract_demurrage = 1 - sim.get_demurrage_modifier() # demurrage in percent (float)
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frontend_demurrage = ((1 - decay_per_minute) ** minutes / 100) # corresponding demurrage modifier (float)
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demurrage_delta = contract_demurrage - frontend_demurrage # difference between demurrage in contract and demurrage calculated in frontend
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alice_checksum = 50000000 - (50000000 * frontend_demurrage) + (200000000 * frontend_demurrage) # alice's balance calculated with frontend demurrage
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print("""alice frontend balance {}
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alice contract balance {}
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frontend demurrage {}
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contract demurrage {}
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demurrage delta {}""".format(
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alice_checksum,
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sim.balance(alice),
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frontend_demurrage,
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contract_demurrage,
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demurrage_delta),
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)
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balance_sum = sim.balance(alice) + sim.balance(bob) + sim.balance(carol)
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print('sum of contract demurraged balances {}'.format(balance_sum))
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