Disambiguate fraction bit when 0 participants edge case

This commit is contained in:
nolash 2021-02-05 18:52:01 +01:00
parent 26abe066b6
commit b6e2116a1d
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
5 changed files with 410 additions and 9 deletions

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@ -129,6 +129,8 @@ class Test(unittest.TestCase):
def test_apply_tax(self):
self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
self.eth_tester.mine_blocks(PERIOD)
tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)

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@ -0,0 +1,78 @@
# standard imports
import os
import unittest
import json
import logging
# third-party imports
import web3
import eth_tester
import eth_abi
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
logging.getLogger('web3').setLevel(logging.WARNING)
logging.getLogger('eth.vm').setLevel(logging.WARNING)
testdir = os.path.dirname(__file__)
#BLOCKTIME = 5 # seconds
TAX_LEVEL = 10000 * 2 # 2%
#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
PERIOD = 2
class Test(unittest.TestCase):
contract = None
def setUp(self):
eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
'gas_limit': 9000000,
})
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.bin'), 'r')
self.bytecode = f.read()
f.close()
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.json'), 'r')
self.abi = json.load(f)
f.close()
backend = eth_tester.PyEVMBackend(eth_params)
self.eth_tester = eth_tester.EthereumTester(backend)
provider = web3.Web3.EthereumTesterProvider(self.eth_tester)
self.w3 = web3.Web3(provider)
self.sink_address = self.w3.eth.accounts[9]
c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
self.start_block = self.w3.eth.blockNumber
def tearDown(self):
pass
def test_period(self):
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
self.eth_tester.mine_blocks(PERIOD * 10)
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
logg.debug('r {}'.format(r));
self.assertEqual(r.status, 1)
period = self.contract.functions.accountPeriod(self.w3.eth.accounts[1]).call()
self.assertEqual(period, 12)
if __name__ == '__main__':
unittest.main()

90
python/tests/test_pure.py Normal file
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@ -0,0 +1,90 @@
# standard imports
import os
import unittest
import json
import logging
import math
# third-party imports
import web3
import eth_tester
import eth_abi
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
logging.getLogger('web3').setLevel(logging.WARNING)
logging.getLogger('eth.vm').setLevel(logging.WARNING)
testdir = os.path.dirname(__file__)
#BLOCKTIME = 5 # seconds
TAX_LEVEL = 10000 * 2 # 2%
#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
PERIOD = 10
class Test(unittest.TestCase):
contract = None
def setUp(self):
eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
'gas_limit': 9000000,
})
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.bin'), 'r')
self.bytecode = f.read()
f.close()
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.json'), 'r')
self.abi = json.load(f)
f.close()
backend = eth_tester.PyEVMBackend(eth_params)
self.eth_tester = eth_tester.EthereumTester(backend)
provider = web3.Web3.EthereumTesterProvider(self.eth_tester)
self.w3 = web3.Web3(provider)
self.sink_address = self.w3.eth.accounts[9]
c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
self.start_block = self.w3.eth.blockNumber
def tearDown(self):
pass
def test_fractional_state(self):
with self.assertRaises(eth_tester.exceptions.TransactionFailed):
self.contract.functions.remainder(2, 1).call();
with self.assertRaises(eth_tester.exceptions.TransactionFailed):
remainder = self.contract.functions.remainder(0, 100001).call();
remainder = self.contract.functions.remainder(1, 2).call();
self.assertEqual(remainder, 0);
whole = 5000001
parts = 20000
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
parts = 30000
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
parts = 40001
expect = whole - (math.floor(whole/parts) * parts)
remainder = self.contract.functions.remainder(parts, whole).call();
self.assertEqual(remainder, expect)
if __name__ == '__main__':
unittest.main()

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@ -0,0 +1,205 @@
# standard imports
import os
import unittest
import json
import logging
# third-party imports
import web3
import eth_tester
import eth_abi
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
logging.getLogger('web3').setLevel(logging.WARNING)
logging.getLogger('eth.vm').setLevel(logging.WARNING)
testdir = os.path.dirname(__file__)
#BLOCKTIME = 5 # seconds
TAX_LEVEL = 10000 * 2 # 2%
#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
PERIOD = 10
class Test(unittest.TestCase):
contract = None
def setUp(self):
eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
'gas_limit': 9000000,
})
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.bin'), 'r')
self.bytecode = f.read()
f.close()
f = open(os.path.join(testdir, '../../solidity/RedistributedDemurrageToken.json'), 'r')
self.abi = json.load(f)
f.close()
backend = eth_tester.PyEVMBackend(eth_params)
self.eth_tester = eth_tester.EthereumTester(backend)
provider = web3.Web3.EthereumTesterProvider(self.eth_tester)
self.w3 = web3.Web3(provider)
self.sink_address = self.w3.eth.accounts[9]
c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
self.start_block = self.w3.eth.blockNumber
logg.debug('starting at block number {}'.format(self.start_block))
def tearDown(self):
pass
def debug_periods(self):
pactual = self.contract.functions.actualPeriod().call()
pstart = self.contract.functions.periodStart().call()
pduration = self.contract.functions.periodDuration().call()
blocknumber = self.w3.eth.blockNumber;
logg.debug('actual {} start {} duration {} blocknumber {}'.format(pactual, pstart, pduration, blocknumber))
# TODO: check receipt log outputs
@unittest.skip('foo')
def test_redistribution_storage(self):
self.contract.functions.mintTo(self.w3.eth.accounts[1], 2000).transact()
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
logg.debug('tx before {}'.format(r))
self.assertEqual(r.status, 1)
self.eth_tester.mine_blocks(PERIOD)
redistribution = self.contract.functions.redistributions(0).call();
self.assertEqual(redistribution.hex(), '000000000100000000000000000000000000000000000007d000000000000001')
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[0], 1000000).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.assertEqual(r.status, 1)
redistribution = self.contract.functions.redistributions(1).call()
self.assertEqual(redistribution.hex(), '000000000000000000000000000000000000000000000f4a1000000000000002')
def test_redistribution_balance_on_zero_participants(self):
supply = 1000000000000
tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], supply).transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
self.eth_tester.mine_blocks(PERIOD)
tx_hash = self.contract.functions.applyTax().transact()
r = self.w3.eth.getTransactionReceipt(tx_hash)
logg.debug('r {}'.format(r))
self.assertEqual(r.status, 1)
redistribution = self.contract.functions.redistributions(0).call();
supply = self.contract.functions.totalSupply().call()
sink_increment = int(supply * (TAX_LEVEL / 1000000))
for l in r['logs']:
if l.topics[0].hex() == '0x337db9c77a0769d770641c73e3282be23b15e2bddd830c219461dec832313389': # event Taxed(uint256,uint256)
period = int.from_bytes(l.topics[1], 'big')
self.assertEqual(period, 1)
b = bytes.fromhex(l.data[2:])
remainder = int.from_bytes(b, 'big')
self.assertEqual(remainder, sink_increment)
logg.debug('period {} remainder {}'.format(period, remainder))
sink_balance = self.contract.functions.balanceOf(self.sink_address).call()
logg.debug('{} {}'.format(sink_increment, sink_balance))
self.assertEqual(sink_balance, int(sink_increment * 0.98))
self.assertEqual(sink_balance, int(sink_increment * (1000000 - TAX_LEVEL) / 1000000))
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance, supply - sink_increment)
@unittest.skip('foo')
def test_redistribution_balance_to_single(self):
z = 0
for i in range(3):
redistribution = self.contract.functions.redistributions(0).call();
logg.debug('foo {}'.format(redistribution.hex()))
self.debug_periods();
self.contract.functions.mintTo(self.w3.eth.accounts[i], 1000000*(i+1)).transact()
z += 1000000*(i+1)
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[3], 1000000).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
logg.debug('tx before r {}'.format(r))
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[0]).call()
self.assertEqual(balance, 0)
self.eth_tester.mine_blocks(PERIOD)
redistribution = self.contract.functions.redistributions(0).call();
self.assertEqual(redistribution.hex(), '000000000100000000000000000000000000000000005b8d8000000000000001')
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[3], 0).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
logg.debug('tx after r {}'.format(r))
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[0]).call()
self.assertEqual(balance, int(z * 0.02 * 0.98))
redistribution = self.contract.functions.redistributions(1).call();
self.assertEqual(redistribution.hex(), '000000000000000000000000000000000000000000005b8d8000000000000002')
#@unittest.expectedFailure
@unittest.skip('foo')
def test_redistribution_balance_to_two(self):
z = 0
for i in range(5):
redistribution = self.contract.functions.redistributions(0).call();
logg.debug('foo {}'.format(redistribution.hex()))
self.debug_periods();
self.contract.functions.mintTo(self.w3.eth.accounts[i], 1000000*(i+1)).transact()
z += 1000000*(i+1)
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[5], 1000000).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[6], 2000000).transact({'from': self.w3.eth.accounts[1]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[0]).call()
self.assertEqual(balance, 0)
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
self.assertEqual(balance, 0)
self.eth_tester.mine_blocks(PERIOD)
self.debug_periods();
redistribution = self.contract.functions.redistributions(0).call();
self.assertEqual(redistribution.hex(), '00000000020000000000000000000000000000000000e4e1c000000000000001')
tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[3], 0).transact({'from': self.w3.eth.accounts[0]})
r = self.w3.eth.getTransactionReceipt(tx_hash)
balance = self.contract.functions.balanceOf(self.w3.eth.accounts[0]).call()
#self.assertEqual(balance, 117600)
self.assertEqual(balance, int((z * 0.02 * 0.98) / 2))
redistribution = self.contract.functions.redistributions(1).call();
self.assertEqual(redistribution.hex(), '00000000000000000000000000000000000000000000e4e1c000000000000002')
if __name__ == '__main__':
unittest.main()

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@ -6,9 +6,9 @@ pragma solidity > 0.6.11;
contract RedistributedDemurrageToken {
address public owner;
uint256 public decimals;
string public name;
string public symbol;
uint256 public decimals;
uint256 public totalSupply;
uint256 public periodStart;
@ -198,7 +198,7 @@ contract RedistributedDemurrageToken {
uint256 truncatedResult;
if (_numParts == 0) { // no division by zero please
return _sumWhole;
revert('ERR_NUMPARTS_ZERO');
}
require(_numParts < _sumWhole); // At least you are never LESS than the sum of your parts. Think about that.
@ -207,18 +207,40 @@ contract RedistributedDemurrageToken {
return _sumWhole - truncatedResult;
}
function applyDefaultRedistribution(bytes32 _redistribution) private returns (uint256) {
uint256 redistributionSupply;
uint256 redistributionPeriod;
uint256 unit;
uint256 truncatedResult;
redistributionSupply = toRedistributionSupply(_redistribution);
unit = (redistributionSupply * taxLevel) / 1000000;
//truncatedResult = (unit * taxLevel) / 1000000;
truncatedResult = (unit * 1000000) / taxLevel;
if (truncatedResult < redistributionSupply) {
redistributionPeriod = toRedistributionPeriod(_redistribution); // since we reuse period here, can possibly be optimized by passing period instead
redistributions[redistributionPeriod-1] |= 0x8000000000000000000000000000000000000000000000000000000000000000;
}
increaseBaseBalance(sinkAddress, unit); //truncatedResult);
return unit;
}
// sets the remainder bit for the given period and books the remainder to the sink address balance
// returns false if no change was made
function applyRemainderOnPeriod(uint256 _remainder, uint256 _period) private returns (bool) {
bytes32 redistribution;
redistribution = redistributions[_period-1];
uint256 periodSupply;
if (_remainder == 0) {
return false;
}
redistribution |= 0x8000000000000000000000000000000000000000000000000000000000000000;
increaseBaseBalance(sinkAddress, _remainder);
redistributions[_period-1] |= 0x8000000000000000000000000000000000000000000000000000000000000000;
periodSupply = toRedistributionSupply(redistributions[_period-1]);
increaseBaseBalance(sinkAddress, periodSupply - _remainder);
return true;
}
@ -241,8 +263,12 @@ contract RedistributedDemurrageToken {
redistributions.push(nextRedistribution);
currentParticipants = toRedistributionParticipants(currentRedistribution);
if (currentParticipants == 0) {
currentRemainder = applyDefaultRedistribution(currentRedistribution);
} else {
currentRemainder = remainder(currentParticipants, totalSupply); // we can use totalSupply directly because it will always be the same as the recorded supply on the current redistribution
applyRemainderOnPeriod(currentRemainder, currentPeriod);
}
emit Taxed(currentPeriod, currentRemainder);
return demurrageModifier;
}