# standard imports import os import unittest import json import logging import datetime # external imports from chainlib.eth.constant import ZERO_ADDRESS from chainlib.eth.nonce import RPCNonceOracle from chainlib.eth.tx import receipt from chainlib.eth.block import ( block_latest, block_by_number, ) # local imports from erc20_demurrage_token import DemurrageToken # test imports from erc20_demurrage_token.unittest.base import TestDemurrageDefault logging.basicConfig(level=logging.DEBUG) logg = logging.getLogger() testdir = os.path.dirname(__file__) class TestBurn(TestDemurrageDefault): def test_burn_basic(self): nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], 1000000) r = self.rpc.do(o) nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.burn(self.address, self.accounts[1], 600000) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 0) nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.add_minter(self.address, self.accounts[0], self.accounts[1]) r = self.rpc.do(o) nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.burn(self.address, self.accounts[1], 600000) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 1) o = c.total_supply(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) new_supply = c.parse_total_supply(r) self.assertEqual(new_supply, 400000) o = c.total_burned(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) burned = c.parse_total_burned(r) self.assertEqual(burned, 600000) def test_burned_redistribution(self): nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000) r = self.rpc.do(o) (tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000) r = self.rpc.do(o) (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.sink_address, 500000000) r = self.rpc.do(o) self.backend.time_travel(self.start_time + self.period_seconds) o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0]) r = self.rpc.do(o) bal = c.parse_balance(r) self.assertEqual(bal, 416873881) # 9 periods demurrage (tx_hash, o) = c.change_period(self.address, self.accounts[0]) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 1) o = c.total_supply(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) new_supply = c.parse_total_supply(r) self.assertEqual(new_supply, 500000000) o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0]) r = self.rpc.do(o) bal = c.parse_balance(r) self.assert_within_lower(bal, 500000000, 0.0025) self.backend.time_travel(self.start_time + (self.period_seconds * 2)) (tx_hash, o) = c.change_period(self.address, self.accounts[0]) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 1) o = c.total_supply(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) new_supply = c.parse_total_supply(r) self.assertEqual(new_supply, 500000000) # if we don't burn anything more it should be the same o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0]) r = self.rpc.do(o) bal = c.parse_balance(r) self.assert_within_lower(bal, 500000000, 0.0025) def test_burned_other_redistribution(self): nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc) c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle) (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], 1000000000) r = self.rpc.do(o) (tx_hash, o) = c.burn(self.address, self.accounts[0], 500000000) r = self.rpc.do(o) (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 500000000) r = self.rpc.do(o) self.backend.time_travel(self.start_time + self.period_seconds) o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0]) r = self.rpc.do(o) bal = c.parse_balance(r) self.assertEqual(bal, 416873881) # 9 periods demurrage (tx_hash, o) = c.change_period(self.address, self.accounts[0]) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 1) o = c.total_supply(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) new_supply = c.parse_total_supply(r) self.assertEqual(new_supply, 500000000) o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0]) r = self.rpc.do(o) bal = c.parse_balance(r) self.assertEqual(bal, 408536403) # 9 periods demurrage o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0]) r = self.rpc.do(o) sink_bal = c.parse_balance(r) self.assert_within_lower(sink_bal, 500000000 - 408536403, 0.09) # TODO is this ok variance, 1.0 is ppm? self.backend.time_travel(self.start_time + (self.period_seconds * 2)) (tx_hash, o) = c.change_period(self.address, self.accounts[0]) r = self.rpc.do(o) o = receipt(tx_hash) r = self.rpc.do(o) self.assertEqual(r['status'], 1) o = c.total_supply(self.address, sender_address=self.accounts[0]) r = self.rpc.do(o) new_supply = c.parse_total_supply(r) self.assertEqual(new_supply, 500000000) o = c.balance(self.address, self.accounts[1], sender_address=self.accounts[0]) r = self.rpc.do(o) next_bal = c.parse_balance(r) self.assertEqual(next_bal, 333803985) # 9 periods demurrage o = c.balance(self.address, self.sink_address, sender_address=self.accounts[0]) r = self.rpc.do(o) prev_sink_bal = sink_bal bal = prev_sink_bal + (bal - next_bal) sink_bal = c.parse_balance(r) self.assert_within_lower(sink_bal, bal, 0.09) # TODO is this ok variance, 1.0 is ppm? if __name__ == '__main__': unittest.main()