erc20-demurrage-token/python/tests/test_single.py

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import os
import unittest
import json
import logging
# 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
from chainlib.eth.address import to_checksum_address
from hexathon import (
strip_0x,
add_0x,
)
# local imports
from erc20_demurrage_token import DemurrageToken
# test imports
from erc20_demurrage_token.unittest.base import TestDemurrageSingle
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
testdir = os.path.dirname(__file__)
class TestRedistributionSingle(TestDemurrageSingle):
def test_single_even_if_multiple(self):
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mint_amount = 100000000
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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for i in range(3):
(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[i+1], mint_amount)
r = self.rpc.do(o)
external_address = to_checksum_address('0x' + os.urandom(20).hex())
nonce_oracle = RPCNonceOracle(self.accounts[2], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.transfer(self.address, self.accounts[2], external_address, int(mint_amount) * 0.1)
r = self.rpc.do(o)
nonce_oracle = RPCNonceOracle(self.accounts[3], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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(tx_hash, o) = c.transfer(self.address, self.accounts[3], external_address, int(mint_amount) * 0.2)
r = self.rpc.do(o)
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self.backend.time_travel(self.start_time + self.period_seconds + 1)
(tx_hash, o) = c.apply_demurrage(self.address, self.accounts[3])
self.rpc.do(o)
o = receipt(tx_hash)
rcpt = self.rpc.do(o)
self.assertEqual(rcpt['status'], 1)
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(tx_hash, o) = c.change_period(self.address, self.accounts[3])
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
tax_modifier = (1 - (self.tax_level / 1000000)) ** 10
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o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
r = self.rpc.do(o)
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balance = c.parse_balance(r)
self.assertEqual(balance, int(mint_amount * tax_modifier))
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o = c.balance_of(self.address, self.accounts[2], sender_address=self.accounts[0])
r = self.rpc.do(o)
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balance = c.parse_balance(r)
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base_amount = mint_amount - int(mint_amount * 0.1)
self.assertEqual(balance, int(base_amount * tax_modifier)) #(base_amount - (base_amount * (self.tax_level / 1000000))))
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o = c.balance_of(self.address, self.accounts[3], sender_address=self.accounts[0])
r = self.rpc.do(o)
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balance = c.parse_balance(r)
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base_amount = mint_amount - int(mint_amount * 0.2)
self.assertEqual(balance, int(base_amount * tax_modifier)) #(base_amount - (base_amount * (self.tax_level / 1000000))))
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o = c.total_supply(self.address, sender_address=self.accounts[0])
r = self.rpc.do(o)
new_supply = c.parse_total_supply(r)
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
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balance = c.parse_balance(r)
expected_balance = new_supply - (new_supply * tax_modifier)
self.assert_within_lower(balance, expected_balance, 1)
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if __name__ == '__main__':
unittest.main()