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14 Commits

Author SHA1 Message Date
lash bcc957f861
Remove commented contract code, makefile single nocap only 2023-02-08 08:51:57 +00:00
lash 84b1a5b439
Return redistributions type correctly 2023-02-08 08:44:43 +00:00
lash 5941a6abdf Merge branch 'master' into dev-0.2.0 2022-05-30 07:51:34 +00:00
lash c5de0e3300
Reactivate test, expose sinkaddress 2022-05-28 09:28:10 +00:00
lash cc1a84f818
Add catch-up period test 2022-05-27 13:22:25 +00:00
lash ee871730dc
Remove unneeded demurragestart item 2022-05-27 12:53:11 +00:00
lash 31faa78346
Keep cumulative sink total in state and deduct from upcoming demurrage 2022-05-27 12:51:10 +00:00
lash 18ee9c5f9b
Make tests pass 2022-05-27 12:02:27 +00:00
lash a0557b35a0
Fix cumulative distribution calculation bug in SingleNocap 2022-05-27 11:10:31 +00:00
lash 127c67e665
Add steps option to demurrage cli 2022-05-03 18:19:28 +00:00
lash 1387451e01
Bump deps 2022-04-24 18:53:09 +00:00
lash 3a1fb22631
Remove arg defaults 2022-03-02 13:32:31 +00:00
lash f1a2a78eb4 Merge branch 'master' into lash/apply-cli 2022-03-02 09:03:40 +00:00
lash 1e24ec1352
Add apply demurrage cli tool 2022-03-02 08:15:10 +00:00
14 changed files with 375 additions and 148 deletions

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@ -9,8 +9,7 @@ from chainlib.eth.constant import ZERO_ADDRESS
# local imports
from .token import DemurrageToken
logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()
logg = logging.getLogger(__name__)
class DemurrageCalculator:

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@ -10,6 +10,7 @@ from chainlib.eth.tx import (
from chainlib.hash import keccak256_string_to_hex
from chainlib.eth.contract import (
ABIContractEncoder,
ABIContractDecoder,
ABIContractType,
abi_decode_single,
)
@ -117,6 +118,34 @@ class DemurrageToken(ERC20):
return DemurrageToken.__bytecode[name]
def increase_allowance(self, contract_address, sender_address, address, value, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('increaseAllowance')
enc.typ(ABIContractType.ADDRESS)
enc.typ(ABIContractType.UINT256)
enc.address(address)
enc.uint256(value)
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 decrease_allowance(self, contract_address, sender_address, address, value, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('decreaseAllowance')
enc.typ(ABIContractType.ADDRESS)
enc.typ(ABIContractType.UINT256)
enc.address(address)
enc.uint256(value)
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 add_minter(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('addMinter')
@ -155,6 +184,33 @@ class DemurrageToken(ERC20):
return tx
def burn(self, contract_address, sender_address, value, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('burn')
enc.typ(ABIContractType.UINT256)
enc.uint256(value)
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 total_burned(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('totalBurned')
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 to_base_amount(self, contract_address, value, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
@ -255,8 +311,11 @@ class DemurrageToken(ERC20):
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('toRedistributionPeriod')
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
v = strip_0x(redistribution)
enc.typ_literal('(uint32,uint72,uint104)')
enc.bytes32(v[:64])
enc.bytes32(v[64:128])
enc.bytes32(v[128:192])
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
@ -266,22 +325,26 @@ class DemurrageToken(ERC20):
return o
def to_redistribution_participants(self, contract_address, redistribution, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('toRedistributionParticipants')
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 to_redistribution_participants(self, contract_address, redistribution, sender_address=ZERO_ADDRESS, id_generator=None):
# j = JSONRPCRequest(id_generator)
# o = j.template()
# o['method'] = 'eth_call'
# enc = ABIContractEncoder()
# enc.method('toRedistributionParticipants')
# v = strip_0x(redistribution)
# enc.typ_literal('(uint32,uint72,uint104)')
# #enc.typ(ABIContractType.BYTES32)
# enc.bytes32(v[:64])
# enc.bytes32(v[64:128])
# enc.bytes32(v[128:192])
# 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 to_redistribution_supply(self, contract_address, redistribution, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
@ -289,8 +352,11 @@ class DemurrageToken(ERC20):
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('toRedistributionSupply')
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
v = strip_0x(redistribution)
enc.typ_literal('(uint32,uint72,uint104)')
enc.bytes32(v[:64])
enc.bytes32(v[64:128])
enc.bytes32(v[128:192])
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
@ -306,8 +372,11 @@ class DemurrageToken(ERC20):
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('toRedistributionDemurrageModifier')
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
v = strip_0x(redistribution)
enc.typ_literal('(uint32,uint72,uint104)')
enc.bytes32(v[:64])
enc.bytes32(v[64:128])
enc.bytes32(v[128:192])
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
@ -397,24 +466,24 @@ class DemurrageToken(ERC20):
return self.call_noarg('supplyCap', contract_address, sender_address=sender_address)
def grow_by(self, contract_address, value, period, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('growBy')
enc.typ(ABIContractType.UINT256)
enc.typ(ABIContractType.UINT256)
enc.uint256(value)
enc.uint256(period)
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 grow_by(self, contract_address, value, period, sender_address=ZERO_ADDRESS, id_generator=None):
# j = JSONRPCRequest(id_generator)
# o = j.template()
# o['method'] = 'eth_call'
# enc = ABIContractEncoder()
# enc.method('growBy')
# enc.typ(ABIContractType.UINT256)
# enc.typ(ABIContractType.UINT256)
# enc.uint256(value)
# enc.uint256(period)
# 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 decay_by(self, contract_address, value, period, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
@ -460,8 +529,11 @@ class DemurrageToken(ERC20):
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('getDistributionFromRedistribution')
enc.typ(ABIContractType.BYTES32)
enc.bytes32(redistribution)
v = strip_0x(redistribution)
enc.typ_literal('(uint32,uint72,uint104)')
enc.bytes32(v[:64])
enc.bytes32(v[64:128])
enc.bytes32(v[128:192])
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
@ -504,7 +576,16 @@ class DemurrageToken(ERC20):
@classmethod
def parse_redistributions(self, v):
return abi_decode_single(ABIContractType.BYTES32, v)
d = ABIContractDecoder()
v = strip_0x(v)
d.typ(ABIContractType.BYTES32)
d.typ(ABIContractType.BYTES32)
d.typ(ABIContractType.BYTES32)
d.val(v[:64])
d.val(v[64:128])
d.val(v[128:192])
r = d.decode()
return ''.join(r)
@classmethod
@ -526,6 +607,7 @@ class DemurrageToken(ERC20):
def parse_supply_cap(self, v):
return abi_decode_single(ABIContractType.UINT256, v)
@classmethod
def parse_grow_by(self, v):
return abi_decode_single(ABIContractType.UINT256, v)
@ -549,3 +631,8 @@ class DemurrageToken(ERC20):
@classmethod
def parse_resolution_factor(self, v):
return abi_decode_single(ABIContractType.UINT256, v)
@classmethod
def parse_total_burned(self, v):
return abi_decode_single(ABIContractType.UINT256, v)

View File

@ -6,7 +6,8 @@ set -e
export PYTHONPATH=.
#modes=(MultiNocap MultiCap SingleCap SingleNocap)
modes=(SingleCap SingleNocap) # other contracts need to be updted
#modes=(SingleCap SingleNocap) # other contracts need to be updted
modes=(SingleNocap) # other contracts need to be updted
for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_basic.py
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_growth.py
@ -14,7 +15,8 @@ for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_single.py
done
modes=(SingleCap) # other contracts need to be updted
#modes=(SingleCap) # other contracts need to be updted
modes=()
for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_period.py
done
@ -25,7 +27,8 @@ for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution_single.py
done
modes=(MultiCap SingleCap)
#modes=(MultiCap SingleCap)
modes=()
for m in ${modes[@]}; do
ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_cap.py
done

View File

@ -276,7 +276,52 @@ class TestBasic(TestDemurrageDefault):
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
def test_approve(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.approve(self.address, self.accounts[0], self.accounts[1], 500)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 600)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
(tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 0)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 600)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.increase_allowance(self.address, self.accounts[0], self.accounts[1], 200)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.decrease_allowance(self.address, self.accounts[0], self.accounts[1], 800)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
(tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 42)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
def test_transfer_from(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
@ -315,6 +360,12 @@ class TestBasic(TestDemurrageDefault):
balance = c.parse_balance_of(r)
self.assertEqual(balance, 500)
(tx_hash, o) = c.transfer_from(self.address, self.accounts[2], self.accounts[1], self.accounts[3], 1)
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 0)
if __name__ == '__main__':
unittest.main()

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@ -28,23 +28,23 @@ testdir = os.path.dirname(__file__)
class TestGrowth(TestDemurrageDefault):
def test_grow_by(self):
nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
growth_factor = (1000000 + self.tax_level) / 1000000
v = 1000000000
o = c.grow_by(self.address, v, 1, sender_address=self.accounts[0])
r = self.rpc.do(o)
g = c.parse_grow_by(r)
self.assertEqual(int(v * growth_factor), g)
period = 10
growth_factor = (1 + (self.tax_level) / 1000000) ** period
o = c.grow_by(self.address, v, period, sender_address=self.accounts[0])
r = self.rpc.do(o)
g = c.parse_grow_by(r)
self.assertEqual(int(v * growth_factor), g)
# def test_grow_by(self):
# nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
# c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
#
# growth_factor = (1000000 + self.tax_level) / 1000000
# v = 1000000000
# o = c.grow_by(self.address, v, 1, sender_address=self.accounts[0])
# r = self.rpc.do(o)
# g = c.parse_grow_by(r)
# self.assertEqual(int(v * growth_factor), g)
#
# period = 10
# growth_factor = (1 + (self.tax_level) / 1000000) ** period
# o = c.grow_by(self.address, v, period, sender_address=self.accounts[0])
# r = self.rpc.do(o)
# g = c.parse_grow_by(r)
# self.assertEqual(int(v * growth_factor), g)
def test_decay_by(self):
@ -63,7 +63,7 @@ class TestGrowth(TestDemurrageDefault):
o = c.decay_by(self.address, v, period, sender_address=self.accounts[0])
r = self.rpc.do(o)
g = c.parse_decay_by(r)
self.assertEqual(int(v * growth_factor), g)
self.assertEqual(int(v * growth_factor), g)
if __name__ == '__main__':

View File

@ -24,7 +24,7 @@ from erc20_demurrage_token import DemurrageToken
# test imports
from erc20_demurrage_token.unittest.base import TestDemurrageDefault
logging.basicConfig(level=logging.DEBUG)
logging.basicConfig(level=logging.INFO)
logg = logging.getLogger()
testdir = os.path.dirname(__file__)
@ -88,18 +88,31 @@ class TestRedistribution(TestDemurrageDefault):
(tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], supply)
self.rpc.do(o)
self.backend.time_travel(self.start_time + (self.period_seconds * 10))
self.backend.time_travel(self.start_time + (self.period_seconds * 100))
for i in range(1, 11):
logg.debug('checking period {}'.format(i))
balance_minter = None
balance_sink = None
real_supply = None
for i in range(1, 101):
(tx_hash, o) = c.change_period(self.address, self.accounts[0])
self.rpc.do(o)
o = receipt(tx_hash)
r = self.rpc.do(o)
self.assertEqual(r['status'], 1)
i = 10
o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
r = self.rpc.do(o)
balance_sink = c.parse_balance(r)
o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
r = self.rpc.do(o)
balance_minter = c.parse_balance(r)
real_supply = balance_sink + balance_minter
logg.info('period {} testing sink {} mint {} adds up to supply {} of original {} (delta {})'.format(i, balance_sink, balance_minter, real_supply, supply, supply - real_supply))
i = 100
o = c.redistributions(self.address, i, sender_address=self.accounts[0])
redistribution = self.rpc.do(o)
@ -122,7 +135,7 @@ class TestRedistribution(TestDemurrageDefault):
r = self.rpc.do(o)
balance_minter = c.parse_balance(r)
logg.debug('testing sink {} mint {} adds up to supply {} with demurrage between {} and {}'.format(balance_sink, balance_minter, supply, demurrage_previous, demurrage))
logg.debug('testing sink {} mint {} adds up to supply {} with demurrage between {} and {}'.format(balance_sink, balance_minter, real_supply, demurrage_previous, demurrage))
self.assert_within_lower(balance_minter + balance_sink, supply, 0.001)

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@ -177,6 +177,7 @@ class TestRedistribution(TestDemurrageUnit):
o = c.redistributions(self.address, 0, sender_address=self.accounts[0])
redistribution = self.rpc.do(o)
logg.debug('redistribution {}'.format(redistribution))
o = c.to_redistribution_supply(self.address, redistribution, sender_address=self.accounts[0])
r = self.rpc.do(o)
supply = c.parse_to_redistribution_item(r)

View File

@ -1,18 +1,15 @@
pragma solidity > 0.6.11;
pragma solidity >= 0.8.0;
// SPDX-License-Identifier: GPL-3.0-or-later
contract DemurrageTokenSingleCap {
// Redistribution bit field, with associated shifts and masks
// (Uses sub-byte boundaries)
bytes32[] public redistributions; // uint51(unused) | uint64(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
uint8 constant shiftRedistributionPeriod = 0;
uint256 constant maskRedistributionPeriod = 0x00000000000000000000000000000000000000000000000000000000ffffffff; // (1 << 32) - 1
uint8 constant shiftRedistributionValue = 32;
uint256 constant maskRedistributionValue = 0x00000000000000000000000000000000000000ffffffffffffffffff00000000; // ((1 << 72) - 1) << 32
uint8 constant shiftRedistributionDemurrage = 104;
uint256 constant maskRedistributionDemurrage = 0x0000000000ffffffffffffffffffffffffffff00000000000000000000000000; // ((1 << 20) - 1) << 140
struct redistributionItem {
uint32 period;
uint72 value;
uint104 demurrage;
}
redistributionItem[] public redistributions; // uint51(unused) | uint64(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
// Account balances
mapping (address => uint256) account;
@ -38,7 +35,8 @@ contract DemurrageTokenSingleCap {
uint256 public decimals;
// Implements ERC20
uint256 public totalSupply;
//uint256 public totalSupply;
uint256 supply;
// Last executed period
uint256 public lastPeriod;
@ -46,6 +44,9 @@ contract DemurrageTokenSingleCap {
// Last sink redistribution amount
uint256 public totalSink;
// Value of burnt tokens (burnt tokens do not decay)
uint256 public burned;
// 128 bit resolution of the demurrage divisor
// (this constant x 1000000 is contained within 128 bits)
uint256 constant nanoDivider = 100000000000000000000000000; // now nanodivider, 6 zeros less
@ -95,10 +96,15 @@ contract DemurrageTokenSingleCap {
// Temporary event used in development, will be removed on prod
event Debug(bytes32 _foo);
// Emitted when tokens are burned
event Burn(address indexed _burner, uint256 _value);
// EIP173
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // EIP173
constructor(string memory _name, string memory _symbol, uint8 _decimals, uint128 _taxLevelMinute, uint256 _periodMinutes, address _defaultSinkAddress) public {
redistributionItem memory initialRedistribution;
// ACL setup
owner = msg.sender;
minter[owner] = true;
@ -114,7 +120,7 @@ contract DemurrageTokenSingleCap {
periodDuration = _periodMinutes * 60;
demurrageAmount = uint128(nanoDivider) * 100;
taxLevel = _taxLevelMinute; // Represents 38 decimal places
bytes32 initialRedistribution = toRedistribution(0, demurrageAmount, 0, 1);
initialRedistribution = toRedistribution(0, demurrageAmount, 0, 1);
redistributions.push(initialRedistribution);
// Misc settings
@ -206,7 +212,7 @@ contract DemurrageTokenSingleCap {
changePeriod();
baseAmount = toBaseAmount(_amount);
totalSupply += _amount;
supply += _amount;
increaseBaseBalance(_beneficiary, baseAmount);
emit Mint(msg.sender, _beneficiary, _amount);
saveRedistributionSupply();
@ -214,31 +220,32 @@ contract DemurrageTokenSingleCap {
}
// Deserializes the redistribution word
// uint95(unused) | uint20(demurrageModifier) | uint36(participants) | uint72(value) | uint32(period)
function toRedistribution(uint256 _participants, uint256 _demurrageModifierPpm, uint256 _value, uint256 _period) public pure returns(bytes32) {
bytes32 redistribution;
function toRedistribution(uint256 _participants, uint256 _demurrageModifierPpm, uint256 _value, uint256 _period) public pure returns(redistributionItem memory) {
redistributionItem memory redistribution;
redistribution |= bytes32((_demurrageModifierPpm << shiftRedistributionDemurrage) & maskRedistributionDemurrage);
redistribution |= bytes32((_value << shiftRedistributionValue) & maskRedistributionValue);
redistribution |= bytes32(_period & maskRedistributionPeriod);
redistribution.period = uint32(_period);
redistribution.value = uint72(_value);
redistribution.demurrage = uint104(_demurrageModifierPpm);
return redistribution;
}
// Serializes the demurrage period part of the redistribution word
function toRedistributionPeriod(bytes32 redistribution) public pure returns (uint256) {
return uint256(redistribution) & maskRedistributionPeriod;
function toRedistributionPeriod(redistributionItem memory _redistribution) public pure returns (uint256) {
return uint256(_redistribution.period);
}
// Serializes the supply part of the redistribution word
function toRedistributionSupply(bytes32 redistribution) public pure returns (uint256) {
return (uint256(redistribution) & maskRedistributionValue) >> shiftRedistributionValue;
function toRedistributionSupply(redistributionItem memory _redistribution) public pure returns (uint256) {
return uint256(_redistribution.value);
}
// Serializes the number of participants part of the redistribution word
function toRedistributionDemurrageModifier(bytes32 redistribution) public pure returns (uint256) {
return (uint256(redistribution) & maskRedistributionDemurrage) >> shiftRedistributionDemurrage;
function toRedistributionDemurrageModifier(redistributionItem memory _redistribution) public pure returns (uint256) {
return uint256(_redistribution.demurrage);
}
// Client accessor to the redistributions array length
function redistributionCount() public view returns (uint256) {
return redistributions.length;
@ -246,15 +253,14 @@ contract DemurrageTokenSingleCap {
// Save the current total supply amount to the current redistribution period
function saveRedistributionSupply() private returns (bool) {
uint256 currentRedistribution;
redistributionItem memory currentRedistribution;
uint256 grownSupply;
grownSupply = totalSupply;
currentRedistribution = uint256(redistributions[redistributions.length-1]);
currentRedistribution &= (~maskRedistributionValue);
currentRedistribution |= (grownSupply << shiftRedistributionValue);
grownSupply = totalSupply();
currentRedistribution = redistributions[redistributions.length-1];
currentRedistribution.value = uint72(grownSupply);
redistributions[redistributions.length-1] = bytes32(currentRedistribution);
redistributions[redistributions.length-1] = currentRedistribution;
return true;
}
@ -263,15 +269,16 @@ contract DemurrageTokenSingleCap {
return uint128((block.timestamp - periodStart) / periodDuration + 1);
}
// Add an entered demurrage period to the redistribution array
function checkPeriod() private view returns (bytes32) {
bytes32 lastRedistribution;
// Retrieve next redistribution if the period threshold has been crossed
function checkPeriod() private view returns (redistributionItem memory) {
redistributionItem memory lastRedistribution;
redistributionItem memory emptyRedistribution;
uint256 currentPeriod;
lastRedistribution = redistributions[lastPeriod];
currentPeriod = this.actualPeriod();
if (currentPeriod <= toRedistributionPeriod(lastRedistribution)) {
return bytes32(0x00);
return emptyRedistribution;
}
return lastRedistribution;
}
@ -283,7 +290,7 @@ contract DemurrageTokenSingleCap {
return difference / resolutionFactor;
}
function getDistributionFromRedistribution(bytes32 _redistribution) public returns (uint256) {
function getDistributionFromRedistribution(redistributionItem memory _redistribution) public returns (uint256) {
uint256 redistributionSupply;
uint256 redistributionDemurrage;
@ -293,7 +300,7 @@ contract DemurrageTokenSingleCap {
}
// Returns the amount sent to the sink address
function applyDefaultRedistribution(bytes32 _redistribution) private returns (uint256) {
function applyDefaultRedistribution(redistributionItem memory _redistribution) private returns (uint256) {
uint256 unit;
uint256 baseUnit;
@ -348,37 +355,46 @@ contract DemurrageTokenSingleCap {
return (block.timestamp - _target) / 60;
}
function isEmptyRedistribution(redistributionItem memory _redistribution) public pure returns(bool) {
if (_redistribution.period > 0) {
return false;
}
if (_redistribution.value > 0) {
return false;
}
if (_redistribution.demurrage > 0) {
return false;
}
return true;
}
// Recalculate the demurrage modifier for the new period
// Note that the supply for the consecutive period will be taken at the time of code execution, and thus not necessarily at the time when the redistribution period threshold was crossed.
function changePeriod() public returns (bool) {
bytes32 currentRedistribution;
bytes32 nextRedistribution;
redistributionItem memory currentRedistribution;
redistributionItem memory nextRedistribution;
redistributionItem memory lastRedistribution;
uint256 currentPeriod;
uint256 currentDemurrageAmount;
uint256 lastDemurrageAmount;
uint256 nextRedistributionDemurrage;
uint256 demurrageCounts;
uint256 periodTimestamp;
uint256 nextPeriod;
applyDemurrage();
currentRedistribution = checkPeriod();
if (currentRedistribution == bytes32(0x00)) {
if (isEmptyRedistribution(currentRedistribution)) {
return false;
}
// calculate the decay from previous redistributino
lastRedistribution = redistributions[lastPeriod];
currentPeriod = toRedistributionPeriod(currentRedistribution);
nextPeriod = currentPeriod + 1;
periodTimestamp = getPeriodTimeDelta(currentPeriod);
currentDemurrageAmount = demurrageAmount;
demurrageCounts = demurrageCycles(periodTimestamp);
if (demurrageCounts > 0) {
nextRedistributionDemurrage = growBy(currentDemurrageAmount, demurrageCounts);
} else {
nextRedistributionDemurrage = currentDemurrageAmount;
}
nextRedistribution = toRedistribution(0, nextRedistributionDemurrage, totalSupply, nextPeriod);
lastDemurrageAmount = toRedistributionDemurrageModifier(lastRedistribution);
demurrageCounts = periodDuration / 60;
nextRedistributionDemurrage = decayBy(lastDemurrageAmount, demurrageCounts);
nextRedistribution = toRedistribution(0, nextRedistributionDemurrage, totalSupply(), nextPeriod);
redistributions.push(nextRedistribution);
applyDefaultRedistribution(nextRedistribution);
@ -387,18 +403,18 @@ contract DemurrageTokenSingleCap {
}
// Reverse a value reduced by demurrage by the given period to its original value
function growBy(uint256 _value, uint256 _period) public view returns (uint256) {
uint256 valueFactor;
uint256 truncatedTaxLevel;
valueFactor = growthResolutionFactor;
truncatedTaxLevel = taxLevel / nanoDivider;
for (uint256 i = 0; i < _period; i++) {
valueFactor = valueFactor + ((valueFactor * truncatedTaxLevel) / growthResolutionFactor);
}
return (valueFactor * _value) / growthResolutionFactor;
}
// function growBy(uint256 _value, uint256 _period) public view returns (uint256) {
// uint256 valueFactor;
// uint256 truncatedTaxLevel;
//
// valueFactor = growthResolutionFactor;
// truncatedTaxLevel = taxLevel / nanoDivider;
//
// for (uint256 i = 0; i < _period; i++) {
// valueFactor = valueFactor + ((valueFactor * truncatedTaxLevel) / growthResolutionFactor);
// }
// return (valueFactor * _value) / growthResolutionFactor;
// }
// Calculate a value reduced by demurrage by the given period
function decayBy(uint256 _value, uint256 _period) public view returns (uint256) {
@ -423,14 +439,45 @@ contract DemurrageTokenSingleCap {
function approve(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue;
if (allowance[msg.sender][_spender] > 0) {
require(_value == 0, 'ZERO_FIRST');
}
changePeriod();
baseValue = toBaseAmount(_value);
allowance[msg.sender][_spender] += baseValue;
allowance[msg.sender][_spender] = baseValue;
emit Approval(msg.sender, _spender, _value);
return true;
}
// Reduce allowance by amount
function decreaseAllowance(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue;
baseValue = toBaseAmount(_value);
require(allowance[msg.sender][_spender] >= baseValue);
changePeriod();
allowance[msg.sender][_spender] -= baseValue;
emit Approval(msg.sender, _spender, allowance[msg.sender][_spender]);
return true;
}
// Increase allowance by amount
function increaseAllowance(address _spender, uint256 _value) public returns (bool) {
uint256 baseValue;
changePeriod();
baseValue = toBaseAmount(_value);
allowance[msg.sender][_spender] += baseValue;
emit Approval(msg.sender, _spender, allowance[msg.sender][_spender]);
return true;
}
// Implements ERC20, triggers tax and/or redistribution
function transfer(address _to, uint256 _value) public returns (bool) {
uint256 baseValue;
@ -454,7 +501,9 @@ contract DemurrageTokenSingleCap {
baseValue = toBaseAmount(_value);
require(allowance[_from][msg.sender] >= baseValue);
allowance[_from][msg.sender] -= baseValue;
result = transferBase(_from, _to, baseValue);
emit Transfer(_from, _to, _value);
return result;
}
@ -486,6 +535,29 @@ contract DemurrageTokenSingleCap {
emit OwnershipTransferred(oldOwner, owner);
}
// Explicitly and irretrievably burn tokens
// Only token minters can burn tokens
function burn(uint256 _value) public {
require(minter[msg.sender]);
require(_value <= account[msg.sender]);
uint256 _delta = toBaseAmount(_value);
applyDemurrage();
decreaseBaseBalance(msg.sender, _delta);
burned += _value;
emit Burn(msg.sender, _value);
}
// Implements ERC20
function totalSupply() public view returns (uint256) {
return supply - burned;
}
// Return total number of burned tokens
function totalBurned() public view returns (uint256) {
return burned;
}
// Implements EIP165
function supportsInterface(bytes4 _sum) public pure returns (bool) {
if (_sum == 0xc6bb4b70) { // ERC20

View File

@ -1,6 +1,6 @@
SOLC = /usr/bin/solc
all: multi single
all: single_nocap
multi_nocap:
$(SOLC) DemurrageTokenMultiNocap.sol --abi --evm-version byzantium | awk 'NR>3' > DemurrageTokenMultiNocap.json
@ -33,6 +33,7 @@ test: all
python ../python/tests/test_pure.py
install: all
cp -v DemurrageToken*.{json,bin} ../python/erc20_demurrage_token/data/
cp -v DemurrageToken*.json ../python/erc20_demurrage_token/data/
cp -v DemurrageToken*.bin ../python/erc20_demurrage_token/data/
.PHONY: test install