321 lines
12 KiB
Python
321 lines
12 KiB
Python
# standard imports
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import os
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import unittest
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import json
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import logging
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import datetime
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# external imports
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from chainlib.eth.constant import ZERO_ADDRESS
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from chainlib.eth.nonce import RPCNonceOracle
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from chainlib.eth.tx import receipt
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from chainlib.eth.block import (
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block_latest,
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block_by_number,
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)
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# local imports
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from erc20_demurrage_token import DemurrageToken
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# test imports
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from erc20_demurrage_token.unittest.base import TestDemurrage
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logging.basicConfig(level=logging.INFO)
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logg = logging.getLogger()
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testdir = os.path.dirname(__file__)
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TAX_LEVEL = 2
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class TestBurn(TestDemurrage):
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def setUp(self):
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super(TestBurn, self).setUp()
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def deploy(self, tax_level=None):
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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self.mode = os.environ.get('ERC20_DEMURRAGE_TOKEN_TEST_MODE')
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if self.mode == None:
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self.mode = 'MultiNocap'
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logg.debug('executing test setup default mode {}'.format(self.mode))
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if tax_level != None:
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self.deployer.settings.demurrage_level = tax_level * (10 ** 32)
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self.deployer.settings.sink_address = self.accounts[9]
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self.deployer.sink_address = self.accounts[9]
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super(TestBurn, self).deploy(c, self.mode)
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logg.info('deployed with mode {}'.format(self.mode))
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# Burn tokens and immediately check balances and supply
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def test_burn_basic(self):
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self.deploy()
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], 1000000)
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r = self.rpc.do(o)
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nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.burn(self.address, self.accounts[1], 600000)
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 0)
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.add_minter(self.address, self.accounts[0], self.accounts[1])
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r = self.rpc.do(o)
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nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.burn(self.address, self.accounts[1], 600000)
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.assertEqual(new_supply, 400000)
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o = c.total_burned(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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burned = c.parse_total_burned(r)
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self.assertEqual(burned, 600000)
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# burn tokens and check sink balance and supply after first redistribution period
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def test_burned_redistribution(self):
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self.deploy()
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000)
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r = self.rpc.do(o)
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(tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000)
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r = self.rpc.do(o)
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(tx_hash, o) = c.transfer(self.address, self.accounts[0], self.sink_address, 500000000)
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r = self.rpc.do(o)
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self.backend.time_travel(self.start_time + self.period_seconds)
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bal = c.parse_balance(r)
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self.assertEqual(bal, 416873881) # 9 periods demurrage
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(tx_hash, o) = c.change_period(self.address, self.accounts[0])
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.assertEqual(new_supply, 500000000)
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bal = c.parse_balance(r)
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self.assert_within_lower(bal, 500000000, 0.0025)
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self.backend.time_travel(self.start_time + (self.period_seconds * 2))
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(tx_hash, o) = c.change_period(self.address, self.accounts[0])
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.assertEqual(new_supply, 500000000)
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# if we don't burn anything more it should be the same
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bal = c.parse_balance(r)
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self.assert_within_lower(bal, 500000000, 0.0025)
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# burn tokens and check sink and taxed balance and supply after first redistribution period
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def test_burned_other_redistribution(self):
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self.deploy()
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000)
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r = self.rpc.do(o)
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(tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000)
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r = self.rpc.do(o)
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(tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 500000000)
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r = self.rpc.do(o)
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self.backend.time_travel(self.start_time + self.period_seconds)
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o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bal = c.parse_balance(r)
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self.assertEqual(bal, 416873881) # 9 periods demurrage
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(tx_hash, o) = c.change_period(self.address, self.accounts[0])
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.assertEqual(new_supply, 500000000)
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o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bal = c.parse_balance(r)
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self.assertEqual(bal, 408536403) # 9 periods demurrage
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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sink_bal = c.parse_balance(r)
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self.assert_within_lower(sink_bal, 500000000 - 408536403, 0.09) # TODO is this ok variance, 1.0 is ppm?
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self.backend.time_travel(self.start_time + (self.period_seconds * 2))
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(tx_hash, o) = c.change_period(self.address, self.accounts[0])
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.assertEqual(new_supply, 500000000)
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o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
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r = self.rpc.do(o)
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next_bal = c.parse_balance(r)
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self.assertEqual(next_bal, 333803985) # 9 periods demurrage
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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prev_sink_bal = sink_bal
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bal = prev_sink_bal + (bal - next_bal)
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sink_bal = c.parse_balance(r)
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self.assert_within_lower(sink_bal, bal, 0.09) # TODO is this ok variance, 1.0 is ppm?
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# verify expected results of balance and supply after multiple redistribution periods
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def test_burn_accumulate(self):
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self.deploy(tax_level=2/1000)
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.add_minter(self.address, self.accounts[0], self.sink_address)
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self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.sink_address, self.default_supply)
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r = self.rpc.do(o)
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balance_share = int(self.default_supply / 2)
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nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[1], balance_share)
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r = self.rpc.do(o)
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new_supply = None
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burn_rate = 1000
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sink_bal = None
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bob_bal = None
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bob_refund = None
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o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bob_bal = c.parse_balance(r)
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prev_bob_bal = bob_bal
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iterations = 100
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for i in range(1, iterations + 1):
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nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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if bob_refund != None:
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(tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[1], bob_refund)
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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(tx_hash, o) = c.burn(self.address, self.sink_address, burn_rate)
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r = self.rpc.do(o)
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o = receipt(tx_hash)
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r = self.rpc.do(o)
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self.assertEqual(r['status'], 1)
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nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
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c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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o = c.total_supply(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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new_supply = c.parse_total_supply(r)
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self.backend.time_travel(self.start_time + (self.period_seconds * i))
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(tx_hash, o) = c.change_period(self.address, self.accounts[0])
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self.rpc.do(o)
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o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0])
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r = self.rpc.do(o)
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bob_bal = c.parse_balance(r)
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bob_refund = prev_bob_bal - bob_bal
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o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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burner_bal = c.parse_balance(r)
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sum_supply = bob_bal + burner_bal
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o = c.total_burned(self.address, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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total_burned = c.parse_balance(r)
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o = c.to_base_amount(self.address, total_burned, sender_address=self.accounts[0])
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r = self.rpc.do(o)
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total_burned_base = c.parse_balance(r)
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expected_supply = self.default_supply - (burn_rate * i)
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logg.info('checking burn round {} balance burner {} bob {} supply {} expected {} summed {} burned {} base {}'.format(i, burner_bal, bob_bal, new_supply, expected_supply, sum_supply, total_burned, total_burned_base))
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self.assertEqual(new_supply, expected_supply)
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sum_supply = burner_bal + bob_bal
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logg.debug('balances sink {} bob {} total {} supply real {} original {}'.format(sink_bal, bob_bal, sum_supply, new_supply, self.default_supply))
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self.assert_within_lower(sum_supply, new_supply, 0.00001)
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self.assert_within_greater(burner_bal, balance_share - total_burned, 0.1)
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bob_delta = self.default_supply * ((2 / 1000000) / 1000)
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self.assert_within_lower(bob_bal, balance_share - bob_delta, 0.1)
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self.assertEqual(total_burned, iterations * burn_rate)
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if __name__ == '__main__':
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unittest.main()
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