cicnet/erc20-demurrage-token
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Add supply cap

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This commit is contained in:
lash 2023-02-10 15:58:31 +00:00
parent 3353733405
commit e6eef48808
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
8 changed files with 96 additions and 61 deletions
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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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48
python/erc20_demurrage_token/token.py
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@ -77,16 +77,8 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
__abi = {}
__bytecode = {}
valid_modes = [
'MultiNocap',
'SingleNocap',
'MultiCap',
'SingleCap',
]
def constructor(self, sender_address, settings, cap=0, tx_format=TxFormat.JSONRPC):
if int(cap) < 0:
raise ValueError('cap must be 0 or positive integer')
def constructor(self, sender_address, settings, tx_format=TxFormat.JSONRPC):
code = DemurrageToken.bytecode()
enc = ABIContractEncoder()
enc.string(settings.name)
@ -95,8 +87,6 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
enc.uint256(settings.demurrage_level)
enc.uint256(settings.period_minutes)
enc.address(settings.sink_address)
if cap > 0:
enc.uint256(cap)
code += enc.get()
tx = self.template(sender_address, None, use_nonce=True)
tx = self.set_code(tx, code)
@ -109,23 +99,7 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
@staticmethod
def __to_contract_name(multi, cap):
name = 'DemurrageToken'
if multi:
name += 'Multi'
else:
name += 'Single'
if cap:
name += 'Cap'
else:
name += 'Nocap'
logg.debug('bytecode name {}'.format(name))
return name
@staticmethod
def abi(multi=True, cap=False):
#name = DemurrageToken.__to_contract_name(multi, cap)
def abi(multi=True):
name = 'DemurrageTokenSingleNocap'
if DemurrageToken.__abi.get(name) == None:
f = open(os.path.join(data_dir, name + '.json'), 'r')
@ -135,8 +109,7 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
@staticmethod
def bytecode(multi=True, cap=False):
#name = DemurrageToken.__to_contract_name(multi, cap)
def bytecode(multi=True):
name = 'DemurrageTokenSingleNocap'
if DemurrageToken.__bytecode.get(name) == None:
f = open(os.path.join(data_dir, name + '.bin'), 'r')
@ -185,6 +158,17 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
return tx
def set_max_supply(self, contract_address, sender_address, cap, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('setMaxSupply')
enc.typ(ABIContractType.UINT256)
enc.uint256(cap)
data = enc.get()
tx = self.template(sender_address, contract_address, use_nonce=True)
tx = self.set_code(tx, data)
tx = self.finalize(tx, tx_format)
return tx
def remove_minter(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('removeMinter')
@ -503,8 +487,8 @@ class DemurrageToken(ERC20, SealedContract, ExpiryContract):
return self.call_noarg('demurrageTimestamp', contract_address, sender_address=sender_address)
def supply_cap(self, contract_address, sender_address=ZERO_ADDRESS):
return self.call_noarg('supplyCap', contract_address, sender_address=sender_address)
def max_supply(self, contract_address, sender_address=ZERO_ADDRESS):
return self.call_noarg('maxSupply', contract_address, sender_address=sender_address)
# def grow_by(self, contract_address, value, period, sender_address=ZERO_ADDRESS, id_generator=None):

14
python/erc20_demurrage_token/unittest/base.py
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@ -34,7 +34,7 @@ PERIOD = 43200
class TestTokenDeploy:
"""tax level is ppm, 1000000 = 100%"""
def __init__(self, rpc, token_symbol='FOO', token_name='Foo Token', sink_address=ZERO_ADDRESS, supply=10**12, tax_level=TAX_LEVEL, period=PERIOD):
def __init__(self, rpc, token_symbol='FOO', token_name='Foo Token', sink_address=ZERO_ADDRESS, tax_level=TAX_LEVEL, period=PERIOD):
self.tax_level = tax_level
self.period_seconds = period * 60
@ -60,14 +60,11 @@ class TestTokenDeploy:
except TypeError:
self.start_time = int(r['timestamp'])
self.default_supply = supply
self.default_supply_cap = 0
def deploy(self, rpc, deployer_address, interface, supply_cap=0):
tx_hash = None
o = None
(tx_hash, o) = interface.constructor(deployer_address, self.settings, cap=0)
(tx_hash, o) = interface.constructor(deployer_address, self.settings)
r = rpc.do(o)
o = receipt(tx_hash)
@ -93,8 +90,8 @@ class TestDemurrage(EthTesterCase):
except AttributeError as e:
pass
self.deployer = TestTokenDeploy(self.rpc, period=period, sink_address=self.accounts[9])
self.default_supply = self.deployer.default_supply
self.default_supply_cap = self.deployer.default_supply_cap
self.default_supply = 0
self.default_supply_cap = 0
self.start_block = None
self.address = None
self.start_time = None
@ -148,3 +145,6 @@ class TestDemurrageDefault(TestDemurrage):
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
self.deploy(c)
self.default_supply = 10**12
self.default_supply_cap = self.default_supply

1
python/run_tests.sh
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@ -41,6 +41,7 @@ done
python tests/test_expiry.py
python tests/test_seal.py
python tests/test_cap.py
set +e
set +x

31
python/tests/test_cap.py
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@ -18,7 +18,7 @@ from hexathon import (
from erc20_demurrage_token import DemurrageToken
# test imports
from erc20_demurrage_token.unittest.base import TestDemurrageCap
from erc20_demurrage_token.unittest import TestDemurrageDefault
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
@ -26,18 +26,27 @@ logg = logging.getLogger()
testdir = os.path.dirname(__file__)
class TestCap(TestDemurrageCap):
class TestCap(TestDemurrageDefault):
def test_cap_set(self):
def test_cap(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
o = c.supply_cap(self.address, sender_address=self.accounts[0])
o = c.total_supply(self.address, sender_address=self.accounts[0])
r = self.rpc.do(o)
logg.debug('r {}'.format(r))
(tx_hash, o) = c.set_max_supply(self.address, self.accounts[0], self.default_supply_cap)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
o = c.max_supply(self.address, sender_address=self.accounts[0])
r = self.rpc.do(o)
cap = c.parse_supply_cap(r)
self.assertEqual(cap, self.default_supply_cap)
def test_cap(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], self.default_supply_cap)
@ -53,15 +62,5 @@ class TestCap(TestDemurrageCap):
self.assertEqual(r['status'], 0)
def test_cap_first(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], self.default_supply_cap + 1)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
if __name__ == '__main__':
unittest.main()

31
python/tests/test_seal.py
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@ -156,6 +156,37 @@ class TestSeal(TestDemurrageDefault):
self.assertTrue(c.parse_is_sealed(r))
def test_seal_cap(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
(tx_hash, o) = c.set_max_supply(self.address, self.accounts[0], 100)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.set_max_supply(self.address, self.accounts[0], 200)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.seal(self.address, self.accounts[0], ContractState.CAP_STATE)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.set_max_supply(self.address, self.accounts[0], 300)
r = self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
o = c.is_sealed(self.address, ContractState.CAP_STATE, sender_address=self.accounts[0])
r = self.rpc.do(o)
self.assertTrue(c.parse_is_sealed(r))
if __name__ == '__main__':

28
solidity/DemurrageTokenSingleNocap.sol
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@ -84,6 +84,9 @@ contract DemurrageTokenSingleCap {
uint256 public expires;
bool expired;
// supply xap
uint256 public maxSupply;
// Implements ERC20
event Transfer(address indexed _from, address indexed _to, uint256 _value);
@ -116,6 +119,8 @@ contract DemurrageTokenSingleCap {
event Expired(uint256 _timestamp);
event Cap(uint256 indexed _oldCap, uint256 _newCap);
// property sealing
uint256 public sealState;
uint8 constant MINTER_STATE = 1;
@ -171,10 +176,22 @@ contract DemurrageTokenSingleCap {
}
function setExpirePeriod(uint256 _expirePeriod) public {
uint256 r;
require(!isSealed(EXPIRY_STATE));
require(!expired);
require(msg.sender == owner);
expires = periodStart + (_expirePeriod * periodDuration);
r = periodStart + (_expirePeriod * periodDuration);
require(r > expires);
expires = r;
}
function setMaxSupply(uint256 _cap) public {
require(!isSealed(CAP_STATE));
require(msg.sender == owner);
require(_cap > supply);
emit Cap(maxSupply, _cap);
maxSupply = _cap;
}
@ -283,10 +300,13 @@ contract DemurrageTokenSingleCap {
require(applyExpiry() == 0);
require(minter[msg.sender], 'ERR_ACCESS');
changePeriod();
baseAmount = toBaseAmount(_amount);
changePeriod();
if (maxSupply > 0) {
require(supply + _amount <= maxSupply);
}
supply += _amount;
baseAmount = toBaseAmount(_amount);
increaseBaseBalance(_beneficiary, baseAmount);
emit Mint(msg.sender, _beneficiary, _amount);
saveRedistributionSupply();