erc20-demurrage-token

ERC20 token with redistributed continual demurrage
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test_expiry.py (3190B)

      1 # standard imports
      2 import os
      3 import unittest
      4 import json
      5 import logging
      6 import datetime
      7 
      8 # external imports
      9 from chainlib.eth.constant import ZERO_ADDRESS
     10 from chainlib.eth.nonce import RPCNonceOracle
     11 from chainlib.eth.tx import receipt
     12 from chainlib.eth.block import (
     13         block_latest,
     14         block_by_number,
     15     )
     16 
     17 # local imports
     18 from erc20_demurrage_token import DemurrageToken
     19 
     20 # test imports
     21 from erc20_demurrage_token.unittest import TestDemurrageDefault
     22 
     23 logging.basicConfig(level=logging.DEBUG)
     24 logg = logging.getLogger()
     25 
     26 testdir = os.path.dirname(__file__)
     27 
     28 
     29 class TestExpire(TestDemurrageDefault):
     30 
     31     def test_expires(self):
     32         mint_amount = self.default_supply
     33         nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
     34         c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
     35 
     36         for i in range(3):
     37             (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[i+1], mint_amount)
     38             r = self.rpc.do(o)
     39 
     40         (tx_hash, o) = c.set_expire_period(self.address, self.accounts[0], 2)
     41         r = self.rpc.do(o)
     42         o = receipt(tx_hash)
     43         r = self.rpc.do(o)
     44         self.assertEqual(r['status'], 1)
     45 
     46         o = c.expires(self.address, sender_address=self.accounts[0])
     47         r = self.rpc.do(o)
     48         expiry_time = c.parse_expires(r)
     49 
     50         self.backend.time_travel(expiry_time + 60)
     51         o = block_latest()
     52         r = self.rpc.do(o)
     53         o = block_by_number(r)
     54         r = self.rpc.do(o)
     55         self.assertGreaterEqual(r['timestamp'], expiry_time)
     56         
     57         nonce_oracle = RPCNonceOracle(self.sink_address, self.rpc)
     58         c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
     59         (tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[2], 1)
     60         r = self.rpc.do(o)
     61         o = receipt(tx_hash)
     62         r = self.rpc.do(o)
     63         self.assertEqual(r['status'], 1)
     64 
     65         (tx_hash, o) = c.transfer(self.address, self.sink_address, self.accounts[2], 1)
     66         r = self.rpc.do(o)
     67         o = receipt(tx_hash)
     68         r = self.rpc.do(o)
     69         self.assertEqual(r['status'], 0)
     70 
     71         o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
     72         r = self.rpc.do(o)
     73         balance = c.parse_balance(r)
     74         self.assert_within(balance, 0.9604 * mint_amount, 1)
     75 
     76         o = c.total_supply(self.address, sender_address=self.accounts[0])
     77         r = self.rpc.do(o)
     78         supply = c.parse_balance(r)
     79 
     80         (tx_hash, o) = c.change_period(self.address, self.sink_address)
     81         r = self.rpc.do(o)
     82         o = receipt(tx_hash)
     83         r = self.rpc.do(o)
     84         self.assertEqual(r['status'], 1)
     85 
     86         o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
     87         r = self.rpc.do(o)
     88         balance = c.parse_balance(r)
     89 
     90         o = c.decay_by(self.address, supply, int((expiry_time - self.start_time) / 60), sender_address=self.sink_address)
     91         r = self.rpc.do(o)
     92         target_balance = c.parse_balance(r)
     93 
     94         self.assert_within_lower(balance, supply - target_balance, 0.0001)
     95 
     96 
     97 if __name__ == '__main__':
     98     unittest.main()