Add redistribution single minute demurrage test

python/erc20_demurrage_token/sim/sim.py

@@ -148,10 +148,10 @@ class DemurrageTokenSimulation:
     def get_period(self):
         return self.period
 
-    def get_demurrage_modifier(self):
+    def get_demurrage(self):
         o = self.caller_contract.demurrage_amount(self.address, sender_address=self.caller_address)
         r = self.rpc.do(o)
-        return float(self.caller_contract.parse_demurrage_amount(r) / (10 ** 38))
+        return float(self.caller_contract.parse_demurrage_amount(r) / (10 ** 40))
 
 
     def from_units(self, v):

python/examples/sim_noredistribute.py

@@ -16,7 +16,7 @@ settings.name = 'Simulated Demurrage Token'
 settings.symbol = 'SIM'
 settings.decimals = 6
 settings.demurrage_level = int(decay_per_minute*(10**40))
-settings.period_minutes = 10800 # 1 week in minutes
+settings.period_minutes = 1 # 1 week in minutes
 chain = 'evm:foochain:42'
 cap = (10 ** 6) * (10 ** 12)
 
@@ -55,15 +55,15 @@ period = sim.get_period()
 print('start {} now {} period {} minutes passed {}'.format(start, timestamp, period, minutes))
 
 
-contract_demurrage = 1 - sim.get_demurrage_modifier()    # demurrage in percent (float)
+contract_demurrage = 1 - sim.get_demurrage()    # demurrage in percent (float)
-frontend_demurrage = ((1 - decay_per_minute) ** minutes / 100)   # corresponding demurrage modifier (float)
+frontend_demurrage = 1.0 - ((1 - decay_per_minute) ** minutes)   # corresponding demurrage modifier (float)
 demurrage_delta = contract_demurrage - frontend_demurrage      # difference between demurrage in contract and demurrage calculated in frontend
 
 alice_checksum = 50000000 - (50000000 * frontend_demurrage) + (200000000 * frontend_demurrage) # alice's balance calculated with frontend demurrage
 print("""alice frontend balance {}
 alice contract balance {}
-frontend demurrage {}
+frontend demurrage {:f}
-contract demurrage {}
+contract demurrage {:f}
 demurrage delta {}""".format(
     alice_checksum,
     sim.balance(alice),

python/tests/base.py

@@ -163,3 +163,56 @@ class TestDemurrageCap(TestDemurrage):
         self.deploy(c, self.mode)
 
         logg.info('deployed with mode {}'.format(self.mode))
+
+
+
+class TestDemurrageUnit(TestDemurrage):
+
+    def setUp(self):
+        super(TestDemurrage, self).setUp()
+
+        self.tax_level = 50
+        self.period_seconds = 60
+
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        self.settings = DemurrageTokenSettings()
+        self.settings.name = 'Foo Token'
+        self.settings.symbol = 'FOO'
+        self.settings.decimals = 6
+        self.settings.demurrage_level = self.tax_level * (10 ** 32)
+        self.settings.period_minutes = int(self.period_seconds/60)
+        self.settings.sink_address = self.accounts[9]
+        self.sink_address = self.settings.sink_address
+
+        o = block_latest()
+        self.start_block = self.rpc.do(o)
+        
+        o = block_by_number(self.start_block, include_tx=False)
+        r = self.rpc.do(o)
+
+        try:
+            self.start_time = int(r['timestamp'], 16)
+        except TypeError:
+            self.start_time = int(r['timestamp'])
+
+        self.default_supply = 1000000000000
+        self.default_supply_cap = int(self.default_supply * 10)
+
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        self.mode = os.environ.get('ERC20_DEMURRAGE_TOKEN_TEST_MODE')
+        unit_valid_modes = [
+                    'SingleNocap',
+                    'SingleCap',
+                    ]
+        if self.mode != None:
+            if self.mode not in unit_valid_modes:
+                raise ValueError('Invalid mode "{}" for "unit" contract tests, valid are {}'.format(self.mode, unit_valid_modes))
+        else:
+            self.mode = 'SingleNocap'
+        logg.debug('executing test setup unit mode {}'.format(self.mode))
+
+        self.deploy(c, self.mode)
+
+        logg.info('deployed with mode {}'.format(self.mode))

python/tests/test_redistribution_unit.py

@@ -0,0 +1,138 @@
+import os
+import unittest
+import json
+import logging
+
+# external imports
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.block import (
+        block_latest,
+        block_by_number,
+        )
+from chainlib.eth.address import to_checksum_address
+from hexathon import (
+        strip_0x,
+        add_0x,
+        )
+
+# local imports
+from erc20_demurrage_token import DemurrageToken
+
+# test imports
+from tests.base import TestDemurrageUnit
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+testdir = os.path.dirname(__file__)
+
+
+class TestRedistribution(TestDemurrageUnit):
+
+    def test_single_step(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        mint_amount = 100000000
+
+        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], mint_amount)
+        self.rpc.do(o)
+
+        self.backend.time_travel(self.start_time + self.period_seconds)
+
+        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
+        self.rpc.do(o)
+
+        expected_balance = int(mint_amount - ((self.tax_level / 1000000) * mint_amount))
+
+        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance_of(r)
+
+        self.assertEqual(balance, expected_balance)
+
+
+    def test_single_step_multi(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        mint_amount = 100000000
+
+        for i in range(3):
+            (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[i+1], mint_amount)
+            self.rpc.do(o)
+    
+        self.backend.time_travel(self.start_time + self.period_seconds)
+
+        (tx_hash, o) = c.change_period(self.address, self.accounts[0])
+        self.rpc.do(o)
+
+        expected_balance = int(mint_amount - ((self.tax_level / 1000000) * mint_amount))
+
+        for i in range(3):
+            o = c.balance_of(self.address, self.accounts[i+1], sender_address=self.accounts[0])
+            r = self.rpc.do(o)
+            balance = c.parse_balance_of(r)
+            self.assertEqual(balance, expected_balance)
+
+
+    def test_single_step_transfer(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        mint_amount = 100000000
+        half_mint_amount = int(mint_amount / 2)
+
+        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[1], mint_amount)
+        self.rpc.do(o)
+
+        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[2], mint_amount)
+        self.rpc.do(o)
+    
+        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash, o) = c.transfer(self.address, self.accounts[1], self.accounts[3], half_mint_amount)
+        self.rpc.do(o)
+
+        self.backend.time_travel(self.start_time + self.period_seconds)
+
+        (tx_hash, o) = c.change_period(self.address, self.accounts[1])
+        self.rpc.do(o)
+
+        demurrage_amount = int((self.tax_level / 1000000) * mint_amount)
+
+        expected_balance = mint_amount - demurrage_amount
+        o = c.balance_of(self.address, self.accounts[2], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance_of(r)
+        self.assertEqual(balance, expected_balance)
+
+        half_demurrage_amount = int((self.tax_level / 1000000) * half_mint_amount)
+
+        expected_balance = half_mint_amount - half_demurrage_amount
+        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance_of(r)
+        self.assertEqual(balance, expected_balance)
+
+        o = c.balance_of(self.address, self.accounts[3], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance_of(r)
+        self.assertEqual(balance, expected_balance)
+
+        o = c.total_supply(self.address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        supply = c.parse_total_supply(r)
+
+        expected_balance = int(supply * (self.tax_level / 1000000))
+
+        o = c.balance_of(self.address, self.sink_address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance_of(r)
+        self.assertEqual(balance, expected_balance)
+
+
+if __name__ == '__main__':
+    unittest.main()