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

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# 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 import TestDemurrageDefault
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
testdir = os.path.dirname(__file__)
class TestExpire(TestDemurrageDefault):
def test_expires(self):
mint_amount = self.default_supply
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
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)
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(tx_hash, o) = c.set_expires_period(self.address, self.accounts[0], 2)
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r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
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o = c.expires(self.address, sender_address=self.accounts[0])
r = self.rpc.do(o)
expiry_time = c.parse_expires(r)
self.backend.time_travel(expiry_time + 60)
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o = block_latest()
r = self.rpc.do(o)
o = block_by_number(r)
r = self.rpc.do(o)
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self.assertGreaterEqual(r['timestamp'], expiry_time)
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nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
(tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[2], 1)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
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(tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[2], 1)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
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o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
r = self.rpc.do(o)
balance = c.parse_balance(r)
self.assert_within(balance, 0.9604 * mint_amount, 1)
o = c.total_supply(self.address, sender_address=self.accounts[0])
r = self.rpc.do(o)
supply = c.parse_balance(r)
(tx_hash, o) = c.change_period(self.address, self.sink_address)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
balance = c.parse_balance(r)
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o = c.decay_by(self.address, supply, int((expiry_time - self.start_time) / 60), sender_address=self.sink_address)
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r = self.rpc.do(o)
target_balance = c.parse_balance(r)
self.assert_within_lower(balance, supply - target_balance, 0.0001)
if __name__ == '__main__':
unittest.main()