cicnet/erc20-demurrage-token
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Fix cumulative distribution calculation bug in SingleNocap

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This commit is contained in:
lash 2022-05-27 11:10:31 +00:00
parent 127c67e665
commit a0557b35a0
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
11 changed files with 132 additions and 22 deletions
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2
python/erc20_demurrage_token/data/DemurrageTokenMultiCap.bin
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2
python/erc20_demurrage_token/data/DemurrageTokenMultiNocap.bin
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2
python/erc20_demurrage_token/data/DemurrageTokenSingleCap.bin
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2
python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.bin
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2
python/erc20_demurrage_token/data/DemurrageTokenSingleNocap.json
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13
python/erc20_demurrage_token/token.py
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@ -38,6 +38,15 @@ class DemurrageTokenSettings:
self.sink_address = None
def __str__(self):
return 'name {} demurrage level {} period minutes {} sink address {}'.format(
self.name,
self.demurrage_level,
self.period_minutes,
self.sink_address,
)
class DemurrageToken(ERC20):
__abi = {}
@ -445,14 +454,16 @@ class DemurrageToken(ERC20):
return o
def get_distribution_from_redistribution(self, contract_address, redistribution, sender_address=ZERO_ADDRESS, id_generator=None):
def get_distribution_from_redistribution(self, contract_address, redistribution, redistribution_previous, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('getDistributionFromRedistribution')
enc.typ(ABIContractType.BYTES32)
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
enc.bytes32(redistribution_previous)
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)

5
python/erc20_demurrage_token/unittest/base.py
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@ -33,7 +33,7 @@ PERIOD = 10
class TestTokenDeploy:
def __init__(self, rpc, token_symbol='FOO', token_name='Foo Token', sink_address=ZERO_ADDRESS, supply=10**12):
self.tax_level = TAX_LEVEL
self.tax_level= TAX_LEVEL
self.period_seconds = PERIOD * 60
self.settings = DemurrageTokenSettings()
@ -44,6 +44,7 @@ class TestTokenDeploy:
self.settings.period_minutes = PERIOD
self.settings.sink_address = sink_address
self.sink_address = self.settings.sink_address
logg.debug('using demurrage token settings: {}'.format(self.settings))
o = block_latest()
self.start_block = rpc.do(o)
@ -203,7 +204,7 @@ class TestDemurrageCap(TestDemurrage):
class TestDemurrageUnit(TestDemurrage):
def setUp(self):
super(TestDemurrage, self).setUp()
super(TestDemurrageUnit, self).setUp()
self.tax_level = 50
self.period_seconds = 60

7
python/run_tests.sh
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@ -17,7 +17,12 @@ done
modes=(SingleCap) # other contracts need to be updted
for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_period.py
# ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution_unit.py
done
modes=(SingleNocap) # other contracts need to be updted
for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution_unit.py
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution.py
done
modes=(MultiCap SingleCap)

72
python/tests/test_redistribution.py
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@ -31,6 +31,78 @@ testdir = os.path.dirname(__file__)
class TestRedistribution(TestDemurrageDefault):
def test_redistribution_boundaries(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
demurrage = (1 - (self.tax_level / 1000000)) * (10**28)
supply = self.default_supply
(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], supply)
self.rpc.do(o)
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
balance = c.parse_balance(r)
logg.debug('balance before {} supply {}'.format(balance, supply))
self.backend.time_travel(self.start_time + self.period_seconds)
(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.redistributions(self.address, 1, sender_address=self.accounts[0])
r = self.rpc.do(o)
oo = c.to_redistribution_supply(self.address, r, sender_address=self.accounts[0])
rr = self.rpc.do(oo)
oo = c.to_redistribution_demurrage_modifier(self.address, r, sender_address=self.accounts[0])
rr = self.rpc.do(oo)
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
balance = c.parse_balance(r)
self.backend.time_travel(self.start_time + self.period_seconds * 2 + 1)
(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.redistributions(self.address, 2, sender_address=self.accounts[0])
r = self.rpc.do(o)
oo = c.to_redistribution_supply(self.address, r, sender_address=self.accounts[0])
rr = self.rpc.do(oo)
oo = c.to_redistribution_demurrage_modifier(self.address, r, sender_address=self.accounts[0])
rr = self.rpc.do(oo)
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
balance = c.parse_balance(r)
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('toRedistributionDemurrageModifier')
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
o['params'].append(self.normalize(tx))
o['params'].append('latest')
o = j.finalize(o)
return o
def test_whole_is_parts(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)

19
python/tests/test_redistribution_unit.py
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@ -31,8 +31,9 @@ testdir = os.path.dirname(__file__)
class TestRedistribution(TestDemurrageUnit):
# TODO: move to "pure" test file when getdistribution is implemented in all contracts
def test_distribution(self):
def test_distribution_direct(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
@ -40,6 +41,8 @@ class TestRedistribution(TestDemurrageUnit):
demurrage = (1 - (self.tax_level / 1000000)) * (10**28)
supply = self.default_supply
logg.debug('demurrage {} supply {}'.format(demurrage))
o = c.get_distribution(self.address, supply, demurrage, sender_address=self.accounts[0])
r = self.rpc.do(o)
distribution = c.parse_get_distribution(r)
@ -51,17 +54,23 @@ class TestRedistribution(TestDemurrageUnit):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
#demurrage = (1 - (self.tax_level / 1000000)) * (10**38)
demurrage = (1 - (self.tax_level / 1000000)) * (10**28)
demurrage_previous = (1 - (self.tax_level / 100000)) * (10**28)
demurrage = (1 - ((self.tax_level * 1.33) / 100000)) * (10**28)
logg.debug('demurrage then {} now {}'.format(demurrage_previous, demurrage))
supply = self.default_supply
o = c.to_redistribution(self.address, 0, demurrage, supply, 1, sender_address=self.accounts[0])
o = c.to_redistribution(self.address, 0, demurrage_previous, supply, 1, sender_address=self.accounts[0])
redistribution_previous = self.rpc.do(o)
o = c.to_redistribution(self.address, 0, demurrage, supply, 2, sender_address=self.accounts[0])
redistribution = self.rpc.do(o)
o = c.get_distribution_from_redistribution(self.address, redistribution, self.accounts[0])
o = c.get_distribution_from_redistribution(self.address, redistribution, redistribution_previous, self.accounts[0])
r = self.rpc.do(o)
distribution = c.parse_get_distribution(r)
expected_distribution = self.default_supply * (self.tax_level / 1000000)
logg.debug('distribution {} supply {}'.format(distribution, self.default_supply))
self.assert_within_lower(distribution, expected_distribution, 1000)

28
solidity/DemurrageTokenSingleNocap.sol
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@ -20,6 +20,8 @@ contract DemurrageTokenSingleCap {
// Cached demurrage amount, ppm with 38 digit resolution
uint128 public demurrageAmount;
uint256 public demurrageStart;
// Cached demurrage period; the period for which demurrageAmount was calculated
//uint128 public demurragePeriod;
// Cached demurrage timestamp; the timestamp for which demurrageAmount was last calculated
@ -42,8 +44,11 @@ contract DemurrageTokenSingleCap {
// Implements ERC20
uint256 public totalSupply;
// Last executed period
uint256 public lastPeriod;
// Minimum amount of (demurraged) tokens an account must spend to participate in redistribution for a particular period
uint256 public minimumParticipantSpend;
//uint256 public minimumParticipantSpend;
// 128 bit resolution of the demurrage divisor
// (this constant x 1000000 is contained within 128 bits)
@ -113,7 +118,9 @@ contract DemurrageTokenSingleCap {
periodDuration = _periodMinutes * 60;
//demurrageAmount = 100000000000000000000000000000000000000 - _taxLevelMinute; // Represents 38 decimal places, same as resolutionFactor
//demurrageAmount = 100000000000000000000000000000000000000;
demurrageAmount = 10000000000000000000000000000;
//demurrageAmount = 10000000000000000000000000000;
demurrageAmount = uint128(nanoDivider) * 100;
demurrageStart = demurrageAmount;
//demurragePeriod = 1;
taxLevel = _taxLevelMinute; // Represents 38 decimal places
bytes32 initialRedistribution = toRedistribution(0, demurrageAmount, 0, 1);
@ -121,7 +128,7 @@ contract DemurrageTokenSingleCap {
// Misc settings
sinkAddress = _defaultSinkAddress;
minimumParticipantSpend = 10 ** uint256(_decimals);
//minimumParticipantSpend = 10 ** uint256(_decimals);
}
@ -274,7 +281,8 @@ contract DemurrageTokenSingleCap {
bytes32 lastRedistribution;
uint256 currentPeriod;
lastRedistribution = redistributions[redistributions.length-1];
//lastRedistribution = redistributions[redistributions.length-1];
lastRedistribution = redistributions[lastPeriod];
currentPeriod = this.actualPeriod();
if (currentPeriod <= toRedistributionPeriod(lastRedistribution)) {
return bytes32(0x00);
@ -290,21 +298,25 @@ contract DemurrageTokenSingleCap {
return difference / resolutionFactor;
}
function getDistributionFromRedistribution(bytes32 _redistribution) public returns (uint256) {
function getDistributionFromRedistribution(bytes32 _redistribution, bytes32 _redistributionPrevious) public returns (uint256) {
uint256 redistributionSupply;
uint256 redistributionDemurrage;
uint256 redistributionDemurragePrevious;
redistributionSupply = toRedistributionSupply(_redistribution);
redistributionDemurrage = toRedistributionDemurrageModifier(_redistribution);
redistributionDemurragePrevious = toRedistributionDemurrageModifier(_redistributionPrevious);
redistributionDemurrage = demurrageStart - (redistributionDemurragePrevious - redistributionDemurrage);
return getDistribution(redistributionSupply, redistributionDemurrage);
}
// Returns the amount sent to the sink address
function applyDefaultRedistribution(bytes32 _redistribution) private returns (uint256) {
function applyDefaultRedistribution(bytes32 _redistribution, bytes32 _redistributionPrevious) private returns (uint256) {
uint256 unit;
unit = getDistributionFromRedistribution(_redistribution);
unit = getDistributionFromRedistribution(_redistribution, _redistributionPrevious);
increaseBaseBalance(sinkAddress, toBaseAmount(unit));
lastPeriod += 1;
return unit;
}
@ -388,7 +400,7 @@ contract DemurrageTokenSingleCap {
nextRedistribution = toRedistribution(0, nextRedistributionDemurrage, totalSupply, nextPeriod);
redistributions.push(nextRedistribution);
applyDefaultRedistribution(nextRedistribution);
applyDefaultRedistribution(nextRedistribution, currentRedistribution);
emit Period(nextPeriod);
return true;
}