mirror of
git://holbrook.no/erc20-demurrage-token
synced 2024-12-22 11:57:32 +01:00
Rewrite to use timestamp instead of blocks
This commit is contained in:
nolash
parent
50c9cb61b5
commit
2ea28aacd1
GPG Key ID:
21D2E7BB88C2A746
@ -3,6 +3,7 @@ import os
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import unittest
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import json
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import logging
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import datetime
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# third-party imports
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import web3
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@ -18,9 +19,11 @@ logging.getLogger('eth.vm').setLevel(logging.WARNING)
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testdir = os.path.dirname(__file__)
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#BLOCKTIME = 5 # seconds
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TAX_LEVEL = 10000 * 2 # 2%
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TAX_LEVEL = int(10000 * 2) # 2%
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# calc "1-(0.98)^(1/518400)" <- 518400 = 30 days of blocks
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# 0.00000003897127107225
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#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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PERIOD = 10
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PERIOD = 1
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class Test(unittest.TestCase):
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@ -48,12 +51,15 @@ class Test(unittest.TestCase):
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self.sink_address = self.w3.eth.accounts[9]
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c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL * (10 ** 32), PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
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self.start_block = self.w3.eth.blockNumber
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b = self.w3.eth.getBlock(self.start_block)
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self.start_time = b['timestamp']
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def tearDown(self):
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pass
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@ -61,10 +67,31 @@ class Test(unittest.TestCase):
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def test_hello(self):
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self.assertEqual(self.contract.functions.actualPeriod().call(), 1)
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self.eth_tester.mine_blocks(PERIOD)
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self.eth_tester.time_travel(self.start_time + 61)
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self.assertEqual(self.contract.functions.actualPeriod().call(), 2)
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def test_apply_demurrage(self):
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modifier = 10 * (10 ** 37)
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demurrage_modifier = self.contract.functions.demurrageModifier().call()
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demurrage_modifier &= (1 << 128) - 1
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self.assertEqual(modifier, demurrage_modifier)
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self.eth_tester.time_travel(self.start_time + 59)
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demurrage_modifier = self.contract.functions.demurrageModifier().call()
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demurrage_modifier &= (1 << 128) - 1
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self.assertEqual(modifier, demurrage_modifier)
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self.eth_tester.time_travel(self.start_time + 61)
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tx_hash = self.contract.functions.applyDemurrage().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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demurrage_modifier = self.contract.functions.demurrageModifier().call()
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demurrage_modifier &= (1 << 128) - 1
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self.assertEqual(int(98 * (10 ** 36)), demurrage_modifier)
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def test_mint(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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@ -80,6 +107,26 @@ class Test(unittest.TestCase):
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance, 2000)
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self.eth_tester.time_travel(self.start_time + 61)
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance, int(2000 * 0.98))
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def test_base_amount(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.time_travel(self.start_time + 61)
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self.contract.functions.applyDemurrage().transact()
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demurrage_modifier = self.contract.functions.demurrageModifier().call()
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demurrage_amount = self.contract.functions.toDemurrageAmount(demurrage_modifier).call()
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logg.debug('d {} {}'.format(demurrage_modifier.to_bytes(32, 'big').hex(), demurrage_amount))
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a = self.contract.functions.toBaseAmount(1000).call();
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self.assertEqual(a, 1020)
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def test_transfer(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
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@ -128,62 +175,5 @@ class Test(unittest.TestCase):
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self.assertEqual(balance_alice, 500)
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def test_apply_tax(self):
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self.contract.functions.mintTo(self.w3.eth.accounts[1], 1024).transact()
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(self.contract.functions.redistributionCount().call(), 2)
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self.assertEqual(self.contract.functions.demurrageModifier().call(), 980000)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(self.contract.functions.redistributionCount().call(), 3)
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self.assertEqual(self.contract.functions.demurrageModifier().call(), 960400)
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def test_tax_balance(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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balance = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance, 980)
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def test_taxed_transfer(self):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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tx_hash = self.contract.functions.applyTax().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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self.assertEqual(balance_alice, 980000)
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500000).transact({'from': self.w3.eth.accounts[1]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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logg.debug('r {}'.format(r))
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self.assertEqual(r.status, 1)
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balance_alice = self.contract.functions.balanceOf(self.w3.eth.accounts[1]).call()
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balance_alice_trunc = int(balance_alice/1000)*1000
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self.assertEqual(balance_alice_trunc, 480000)
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balance_bob = self.contract.functions.balanceOf(self.w3.eth.accounts[2]).call()
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balance_bob_trunc = int(balance_bob/1000)*1000
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self.assertEqual(balance_bob_trunc, 500000)
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if __name__ == '__main__':
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unittest.main()
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@ -20,7 +20,7 @@ testdir = os.path.dirname(__file__)
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#BLOCKTIME = 5 # seconds
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TAX_LEVEL = 10000 * 2 # 2%
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#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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PERIOD = 2
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PERIOD = 1
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class Test(unittest.TestCase):
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@ -47,12 +47,15 @@ class Test(unittest.TestCase):
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self.sink_address = self.w3.eth.accounts[9]
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c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL * (10 ** 32), PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
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self.start_block = self.w3.eth.blockNumber
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b = self.w3.eth.getBlock(self.start_block)
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self.start_time = b['timestamp']
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def tearDown(self):
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pass
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@ -63,15 +66,14 @@ class Test(unittest.TestCase):
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD * 10)
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
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self.eth_tester.time_travel(self.start_time + 61)
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tx_hash = self.contract.functions.changePeriod().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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logg.debug('r {}'.format(r));
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self.assertEqual(r.status, 1)
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period = self.contract.functions.accountPeriod(self.w3.eth.accounts[1]).call()
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self.assertEqual(period, 12)
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redistribution = self.contract.functions.redistributions(1).call()
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self.assertEqual(2, self.contract.functions.toRedistributionPeriod(redistribution).call())
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self.assertEqual(2, self.contract.functions.actualPeriod().call())
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if __name__ == '__main__':
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@ -19,8 +19,7 @@ logging.getLogger('eth.vm').setLevel(logging.WARNING)
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testdir = os.path.dirname(__file__)
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#BLOCKTIME = 5 # seconds
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TAX_LEVEL = 10000 * 2 # 2%
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#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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TAX_LEVEL = int((10000 * 2) * (10 ** 32)) # 2%
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PERIOD = 10
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@ -62,14 +61,20 @@ class Test(unittest.TestCase):
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def test_tax_period(self):
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t = self.contract.functions.taxLevel().call()
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logg.debug('taxlevel {}'.format(t))
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a = self.contract.functions.toTaxPeriodAmount(1000000, 0).call()
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self.assertEqual(1000000, a)
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self.assertEqual(a, 1000000)
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a = self.contract.functions.toTaxPeriodAmount(1000000, 1).call()
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self.assertEqual(980000, a)
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self.assertEqual(a, 980000)
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a = self.contract.functions.toTaxPeriodAmount(1000000, 2).call()
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self.assertEqual(960400, a)
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self.assertEqual(a, 960400)
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a = self.contract.functions.toTaxPeriodAmount(980000, 1).call()
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self.assertEqual(a, 960400)
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def test_fractional_state(self):
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@ -20,7 +20,7 @@ testdir = os.path.dirname(__file__)
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#BLOCKTIME = 5 # seconds
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TAX_LEVEL = 10000 * 2 # 2%
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#PERIOD = int(60/BLOCKTIME) * 60 * 24 * 30 # month
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PERIOD = 20
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PERIOD = 1
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class Test(unittest.TestCase):
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@ -47,13 +47,15 @@ class Test(unittest.TestCase):
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self.sink_address = self.w3.eth.accounts[9]
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c = self.w3.eth.contract(abi=self.abi, bytecode=self.bytecode)
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL, PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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tx_hash = c.constructor('Foo Token', 'FOO', 6, TAX_LEVEL * (10 ** 32), PERIOD, self.sink_address).transact({'from': self.w3.eth.accounts[0]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.contract = self.w3.eth.contract(abi=self.abi, address=r.contractAddress)
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self.start_block = self.w3.eth.blockNumber
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logg.debug('starting at block number {}'.format(self.start_block))
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b = self.w3.eth.getBlock(self.start_block)
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self.start_time = b['timestamp']
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def tearDown(self):
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pass
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@ -68,26 +70,28 @@ class Test(unittest.TestCase):
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# TODO: check receipt log outputs
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@unittest.skip('foo')
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def test_redistribution_storage(self):
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self.contract.functions.mintTo(self.w3.eth.accounts[1], 2000).transact()
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self.contract.functions.mintTo(self.w3.eth.accounts[1], 1000000).transact()
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self.contract.functions.mintTo(self.w3.eth.accounts[2], 1000000).transact()
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tx_hash = self.contract.functions.transfer(self.w3.eth.accounts[2], 500).transact({'from': self.w3.eth.accounts[1]})
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external_address = web3.Web3.toChecksumAddress('0x' + os.urandom(20).hex())
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tx_hash = self.contract.functions.transfer(external_address, 1000000).transact({'from': self.w3.eth.accounts[2]})
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tx_hash = self.contract.functions.transfer(external_address, 999999).transact({'from': self.w3.eth.accounts[1]})
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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logg.debug('tx before {}'.format(r))
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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self.eth_tester.time_travel(self.start_time + 61)
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redistribution = self.contract.functions.redistributions(0).call();
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self.assertEqual(redistribution.hex(), '000000000100000000000000000000000000000000000007d000000000000001')
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self.assertEqual(redistribution.hex(), '000000000100000000000000000000000000000000001e848000000000000001')
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[0], 1000000).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(r.status, 1)
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redistribution = self.contract.functions.redistributions(1).call()
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self.assertEqual(redistribution.hex(), '000000000000000000000000000000000000000000000f4a1000000000000002')
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self.assertEqual(redistribution.hex(), '000000000000000000000000000000000000000000002dc6c000000000000002')
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def test_redistribution_balance_on_zero_participants(self):
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@ -95,24 +99,27 @@ class Test(unittest.TestCase):
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tx_hash = self.contract.functions.mintTo(self.w3.eth.accounts[1], supply).transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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self.eth_tester.mine_blocks(PERIOD)
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self.eth_tester.time_travel(self.start_time + 61)
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tx_hash = self.contract.functions.applyTax().transact()
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tx_hash = self.contract.functions.applyDemurrage().transact()
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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logg.debug('r {}'.format(r))
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self.assertEqual(r.status, 1)
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tx_hash = self.contract.functions.changePeriod().transact()
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rr = self.w3.eth.getTransactionReceipt(tx_hash)
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self.assertEqual(rr.status, 1)
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redistribution = self.contract.functions.redistributions(0).call();
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supply = self.contract.functions.totalSupply().call()
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sink_increment = int(supply * (TAX_LEVEL / 1000000))
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for l in r['logs']:
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if l.topics[0].hex() == '0x337db9c77a0769d770641c73e3282be23b15e2bddd830c219461dec832313389': # event Taxed(uint256,uint256)
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if l.topics[0].hex() == '0xa0717e54e02bd9829db5e6e998aec0ae9de796b8d150a3cc46a92ab869697755': # event Decayed(uint256,uint256,uint256,uint256)
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period = int.from_bytes(l.topics[1], 'big')
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self.assertEqual(period, 1)
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self.assertEqual(period, 2)
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b = bytes.fromhex(l.data[2:])
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remainder = int.from_bytes(b, 'big')
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self.assertEqual(remainder, sink_increment)
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self.assertEqual(remainder, int((1000000 - TAX_LEVEL) * (10 ** 32)))
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logg.debug('period {} remainder {}'.format(period, remainder))
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sink_balance = self.contract.functions.balanceOf(self.sink_address).call()
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@ -140,14 +147,15 @@ class Test(unittest.TestCase):
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r = self.w3.eth.getTransactionReceipt(tx_hash)
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# No cheating!
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self.contract.functions.transfer(self.w3.eth.accounts[3], spend_amount).transact({'from': self.w3.eth.accounts[3]})
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# Too low
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# Cheapskate!
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self.contract.functions.transfer(external_address, spend_amount-1).transact({'from': self.w3.eth.accounts[4]})
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self.assertEqual(r.status, 1)
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self.eth_tester.mine_blocks(PERIOD)
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self.eth_tester.time_travel(self.start_time + 61)
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self.contract.functions.applyTax().transact()
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self.contract.functions.applyDemurrage().transact()
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self.contract.functions.changePeriod().transact()
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bummer_balance = self.contract.functions.balanceOf(self.w3.eth.accounts[3]).call()
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self.assertEqual(bummer_balance, mint_amount - (mint_amount * (TAX_LEVEL / 1000000)))
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@ -11,11 +11,12 @@ contract RedistributedDemurrageToken {
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uint256 public decimals;
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uint256 public totalSupply;
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uint256 public minimumParticipantSpend;
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uint256 constant ppmDivider = 100000000000000000000000000000000;
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uint256 public periodStart;
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uint256 public periodDuration;
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uint256 public taxLevel; // PPM
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uint256 public demurrageModifier; // PPM
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uint256 public immutable periodStart; // timestamp
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uint256 public immutable periodDuration; // duration in SECONDS
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uint256 public immutable taxLevel; // PPM per MINUTE
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uint256 public demurrageModifier; // PPM uint128(block) | uint128(ppm)
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bytes32[] public redistributions; // uint1(isFractional) | uint1(unused) | uint38(participants) | uint160(value) | uint56(period)
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mapping (address => bytes32) account; // uint20(unused) | uint56(period) | uint160(value)
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@ -28,19 +29,20 @@ contract RedistributedDemurrageToken {
|
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event Approval(address indexed _owner, address indexed _spender, uint256 _value);
|
||||
event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value);
|
||||
//event Debug(uint256 _foo);
|
||||
event Taxed(uint256 indexed _period, uint256 remainder);
|
||||
event Decayed(uint256 indexed _period, uint256 indexed _periodCount, uint256 indexed _oldAmount, uint256 _newAmount);
|
||||
event Redistribution(address indexed _account, uint256 indexed _period, uint256 _value);
|
||||
|
||||
constructor(string memory _name, string memory _symbol, uint8 _decimals, uint32 _taxLevel, uint256 _period, address _defaultSinkAddress) public {
|
||||
constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _taxLevelMinute, uint256 _periodMinutes, address _defaultSinkAddress) public {
|
||||
owner = msg.sender;
|
||||
minter[owner] = true;
|
||||
periodStart = block.number;
|
||||
periodDuration = _period;
|
||||
taxLevel = _taxLevel;
|
||||
periodStart = block.timestamp;
|
||||
periodDuration = _periodMinutes * 60;
|
||||
name = _name;
|
||||
symbol = _symbol;
|
||||
decimals = _decimals;
|
||||
demurrageModifier = 1000000;
|
||||
demurrageModifier = ppmDivider * 1000000; // Emulates 38 decimal places
|
||||
demurrageModifier |= (1 << 128);
|
||||
taxLevel = _taxLevelMinute; // 38 decimal places
|
||||
sinkAddress = _defaultSinkAddress;
|
||||
bytes32 initialRedistribution = toRedistribution(0, 0, 1);
|
||||
redistributions.push(initialRedistribution);
|
||||
@ -53,13 +55,24 @@ contract RedistributedDemurrageToken {
|
||||
minter[_minter] = true;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/// ERC20
|
||||
function balanceOf(address _account) public view returns (uint256) {
|
||||
uint256 baseBalance = getBaseBalance(_account);
|
||||
uint256 inverseModifier = 1000000 - demurrageModifier;
|
||||
uint256 balanceModifier = (inverseModifier * baseBalance) / 1000000;
|
||||
return baseBalance - balanceModifier;
|
||||
uint256 baseBalance;
|
||||
uint256 anchorDemurrageAmount;
|
||||
uint256 anchorDemurragePeriod;
|
||||
uint256 currentDemurrageAmount;
|
||||
uint256 periodCount;
|
||||
|
||||
baseBalance = getBaseBalance(_account);
|
||||
anchorDemurrageAmount = toDemurrageAmount(demurrageModifier);
|
||||
anchorDemurragePeriod = toDemurragePeriod(demurrageModifier);
|
||||
|
||||
periodCount = actualPeriod() - toDemurragePeriod(demurrageModifier);
|
||||
|
||||
currentDemurrageAmount = toTaxPeriodAmount(anchorDemurrageAmount, periodCount);
|
||||
|
||||
return (baseBalance * currentDemurrageAmount) / (ppmDivider * 1000000);
|
||||
}
|
||||
|
||||
/// Balance unmodified by demurrage
|
||||
@ -71,7 +84,11 @@ contract RedistributedDemurrageToken {
|
||||
function increaseBaseBalance(address _account, uint256 _delta) private returns (bool) {
|
||||
uint256 oldBalance;
|
||||
uint256 newBalance;
|
||||
|
||||
|
||||
if (_delta == 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
oldBalance = getBaseBalance(_account);
|
||||
newBalance = oldBalance + _delta;
|
||||
require(uint160(newBalance) > uint160(oldBalance), 'ERR_WOULDWRAP'); // revert if increase would result in a wrapped value
|
||||
@ -85,6 +102,10 @@ contract RedistributedDemurrageToken {
|
||||
uint256 oldBalance;
|
||||
uint256 newBalance;
|
||||
|
||||
if (_delta == 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
oldBalance = getBaseBalance(_account);
|
||||
require(oldBalance >= _delta, 'ERR_OVERSPEND'); // overspend guard
|
||||
newBalance = oldBalance - _delta;
|
||||
@ -98,8 +119,8 @@ contract RedistributedDemurrageToken {
|
||||
function mintTo(address _beneficiary, uint256 _amount) external returns (bool) {
|
||||
require(minter[msg.sender]);
|
||||
|
||||
// TODO: get base amount for minting
|
||||
applyTax();
|
||||
applyDemurrage();
|
||||
changePeriod();
|
||||
totalSupply += _amount;
|
||||
increaseBaseBalance(_beneficiary, _amount);
|
||||
emit Mint(msg.sender, _beneficiary, _amount);
|
||||
@ -164,7 +185,7 @@ contract RedistributedDemurrageToken {
|
||||
|
||||
// Get the demurrage period of the current block number
|
||||
function actualPeriod() public view returns (uint256) {
|
||||
return (block.number - periodStart) / periodDuration + 1;
|
||||
return (block.timestamp - periodStart) / periodDuration + 1;
|
||||
}
|
||||
|
||||
// Add an entered demurrage period to the redistribution array
|
||||
@ -228,7 +249,7 @@ contract RedistributedDemurrageToken {
|
||||
redistributions[redistributionPeriod-1] |= 0x8000000001000000000000000000000000000000000000000000000000000000;
|
||||
}
|
||||
|
||||
increaseBaseBalance(sinkAddress, unit); //truncatedResult);
|
||||
increaseBaseBalance(sinkAddress, unit / ppmDivider); //truncatedResult);
|
||||
return unit;
|
||||
}
|
||||
|
||||
@ -248,9 +269,40 @@ contract RedistributedDemurrageToken {
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
function toDemurrageAmount(uint256 _demurrage) public pure returns (uint256) {
|
||||
return _demurrage & 0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff;
|
||||
}
|
||||
|
||||
function toDemurragePeriod(uint256 _demurrage) public pure returns (uint256) {
|
||||
return (_demurrage & 0xffffffffffffffffffffffffffffffff00000000000000000000000000000000) >> 128;
|
||||
}
|
||||
|
||||
function applyDemurrage() public returns (bool) {
|
||||
uint256 epochPeriodCount;
|
||||
uint256 periodCount;
|
||||
uint256 lastDemurrageAmount;
|
||||
uint256 newDemurrageAmount;
|
||||
|
||||
epochPeriodCount = actualPeriod();
|
||||
//epochPeriodCount = (block.timestamp - periodStart) / periodDuration; // toDemurrageTime(demurrageModifier);
|
||||
periodCount = epochPeriodCount - toDemurragePeriod(demurrageModifier);
|
||||
if (periodCount == 0) {
|
||||
return false;
|
||||
}
|
||||
lastDemurrageAmount = toDemurrageAmount(demurrageModifier);
|
||||
newDemurrageAmount = toTaxPeriodAmount(lastDemurrageAmount, periodCount);
|
||||
demurrageModifier = 0;
|
||||
demurrageModifier |= (newDemurrageAmount & 0x00000000000000000000000000000000ffffffffffffffffffffffffffffffff);
|
||||
demurrageModifier |= (epochPeriodCount << 128);
|
||||
emit Decayed(epochPeriodCount, periodCount, lastDemurrageAmount, newDemurrageAmount);
|
||||
return true;
|
||||
}
|
||||
|
||||
// Recalculate the demurrage modifier for the new period
|
||||
// After this, all REPORTED balances will have been reduced by the corresponding ratio (but the effecive totalsupply stays the same)
|
||||
function applyTax() public returns (uint256) {
|
||||
//function applyTax() public returns (uint256) {
|
||||
function changePeriod() public returns (uint256) {
|
||||
bytes32 currentRedistribution;
|
||||
bytes32 nextRedistribution;
|
||||
uint256 currentPeriod;
|
||||
@ -261,7 +313,7 @@ contract RedistributedDemurrageToken {
|
||||
if (currentRedistribution == bytes32(0x00)) {
|
||||
return demurrageModifier;
|
||||
}
|
||||
demurrageModifier -= (demurrageModifier * taxLevel) / 1000000;
|
||||
//demurrageModifier -= (demurrageModifier * taxLevel) / 1000000;
|
||||
currentPeriod = toRedistributionPeriod(currentRedistribution);
|
||||
nextRedistribution = toRedistribution(0, totalSupply, currentPeriod + 1);
|
||||
redistributions.push(nextRedistribution);
|
||||
@ -273,19 +325,20 @@ contract RedistributedDemurrageToken {
|
||||
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;
|
||||
}
|
||||
|
||||
// Calculate a value reduced by demurrage by the given period
|
||||
function toTaxPeriodAmount(uint256 _value, uint256 _period) public view returns (uint256) {
|
||||
uint256 valueFactor;
|
||||
uint256 truncatedTaxLevel;
|
||||
|
||||
// TODO: doesn't work for solidity as floats are missing and using ints linearly increases the order of magnitude
|
||||
// valueFactor = 1000000 * (((1000000-taxLevel)/1000000) ** _period);
|
||||
// TODO: if can't get to work, reverse the iteration from current period.
|
||||
valueFactor = 1000000;
|
||||
truncatedTaxLevel = taxLevel / ppmDivider;
|
||||
|
||||
for (uint256 i = 0; i < _period; i++) {
|
||||
valueFactor = valueFactor - ((valueFactor * taxLevel) / 1000000);
|
||||
valueFactor = valueFactor - ((valueFactor * truncatedTaxLevel) / 1000000);
|
||||
}
|
||||
return (valueFactor * _value) / 1000000;
|
||||
}
|
||||
@ -311,7 +364,7 @@ contract RedistributedDemurrageToken {
|
||||
}
|
||||
|
||||
supply = toRedistributionSupply(periodRedistribution);
|
||||
baseValue = ((supply / participants) * (taxLevel) / 1000000);
|
||||
baseValue = ((supply / participants) * (taxLevel / 1000000)) / ppmDivider;
|
||||
value = toTaxPeriodAmount(baseValue, period - 1);
|
||||
|
||||
account[_account] &= bytes32(0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff);
|
||||
@ -323,7 +376,21 @@ contract RedistributedDemurrageToken {
|
||||
|
||||
// Inflates the given amount according to the current demurrage modifier
|
||||
function toBaseAmount(uint256 _value) public view returns (uint256) {
|
||||
return (_value * 1000000) / demurrageModifier;
|
||||
return (_value * ppmDivider * 1000000) / toDemurrageAmount(demurrageModifier);
|
||||
}
|
||||
|
||||
// ERC20, triggers tax and/or redistribution
|
||||
function approve(address _spender, uint256 _value) public returns (bool) {
|
||||
uint256 baseValue;
|
||||
|
||||
applyDemurrage();
|
||||
changePeriod();
|
||||
applyRedistributionOnAccount(msg.sender);
|
||||
|
||||
baseValue = toBaseAmount(_value);
|
||||
allowance[msg.sender][_spender] += baseValue;
|
||||
emit Approval(msg.sender, _spender, _value);
|
||||
return true;
|
||||
}
|
||||
|
||||
// ERC20, triggers tax and/or redistribution
|
||||
@ -331,7 +398,8 @@ contract RedistributedDemurrageToken {
|
||||
uint256 baseValue;
|
||||
bool result;
|
||||
|
||||
applyTax();
|
||||
applyDemurrage();
|
||||
changePeriod();
|
||||
applyRedistributionOnAccount(msg.sender);
|
||||
|
||||
// TODO: Prefer to truncate the result, instead it seems to round to nearest :/
|
||||
@ -341,6 +409,23 @@ contract RedistributedDemurrageToken {
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
// ERC20, triggers tax and/or redistribution
|
||||
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
|
||||
uint256 baseValue;
|
||||
bool result;
|
||||
|
||||
applyDemurrage();
|
||||
changePeriod();
|
||||
applyRedistributionOnAccount(msg.sender);
|
||||
|
||||
baseValue = toBaseAmount(_value);
|
||||
require(allowance[_from][msg.sender] >= baseValue);
|
||||
|
||||
result = transferBase(_from, _to, baseValue);
|
||||
return result;
|
||||
}
|
||||
|
||||
// ERC20 transfer backend for transfer, transferFrom
|
||||
function transferBase(address _from, address _to, uint256 _value) private returns (bool) {
|
||||
uint256 period;
|
||||
@ -354,32 +439,4 @@ contract RedistributedDemurrageToken {
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// ERC20, triggers tax and/or redistribution
|
||||
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
|
||||
uint256 baseValue;
|
||||
bool result;
|
||||
|
||||
applyTax();
|
||||
applyRedistributionOnAccount(msg.sender);
|
||||
|
||||
baseValue = toBaseAmount(_value);
|
||||
require(allowance[_from][msg.sender] >= baseValue);
|
||||
|
||||
result = transferBase(_from, _to, baseValue);
|
||||
return result;
|
||||
}
|
||||
|
||||
// ERC20, triggers tax and/or redistribution
|
||||
function approve(address _spender, uint256 _value) public returns (bool) {
|
||||
uint256 baseValue;
|
||||
|
||||
applyTax();
|
||||
applyRedistributionOnAccount(msg.sender);
|
||||
|
||||
baseValue = toBaseAmount(_value);
|
||||
allowance[msg.sender][_spender] += baseValue;
|
||||
emit Approval(msg.sender, _spender, _value);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user