Remove redistribute calls on no redistribute sim

python/erc20_demurrage_token/sim/sim.py

@@ -39,6 +39,7 @@ class DemurrageTokenSimulation:
     def __init__(self, chain_str, settings, redistribute=True, cap=0, actors=1):
         self.chain_spec = ChainSpec.from_chain_str(chain_str)
         self.accounts = []
+        self.redistribute = redistribute
         self.keystore = DictKeystore()
         self.signer = EIP155Signer(self.keystore)
         self.eth_helper = create_tester_signer(self.keystore)
@@ -220,22 +221,23 @@ class DemurrageTokenSimulation:
         self.last_block = r['number']
         block_base = self.last_block
         
-
         nonce_oracle = RPCNonceOracle(self.accounts[2], conn=self.rpc)
         c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
         (tx_hash, o) = c.change_period(self.address, self.accounts[2])
         self.rpc.do(o)
 
-        for actor in self.actors:
-            nonce_oracle = RPCNonceOracle(actor, conn=self.rpc)
+        if self.redistribute:
+            for actor in self.actors:
+                nonce_oracle = RPCNonceOracle(actor, conn=self.rpc)
+                c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
+                (tx_hash, o) = c.apply_redistribution_on_account(self.address, actor, actor)
+                self.rpc.do(o)
+
+            nonce_oracle = RPCNonceOracle(self.sink_address, conn=self.rpc)
             c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
-            (tx_hash, o) = c.apply_redistribution_on_account(self.address, actor, actor)
+            (tx_hash, o) = c.apply_redistribution_on_account(self.address, self.sink_address, self.sink_address)
             self.rpc.do(o)
 
-        nonce_oracle = RPCNonceOracle(self.sink_address, conn=self.rpc)
-        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=self.gas_oracle)
-        (tx_hash, o) = c.apply_redistribution_on_account(self.address, self.sink_address, self.sink_address)
-        self.rpc.do(o)
         self.__next_block()
 
         o = block_latest()

python/examples/sim.py

@@ -45,7 +45,7 @@ sim.next()
 print('alice balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(alice), sim.balance(alice, base=True)))
 print('bob balance:   demurraged {:>9d} base {:>9d}'.format(sim.balance(bob), sim.balance(bob, base=True)))
 print('carol balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(carol), sim.balance(carol, base=True)))
-
+print('sink balance:  demurraged {:>9d} base {:>9d}'.format(sim.balance(sim.sink_address), sim.balance(sim.sink_address, base=True)))
 
 # get times
 minutes = sim.get_minutes()

python/examples/sim_noredistribute.py

@@ -0,0 +1,76 @@
+# standard imports
+import logging
+
+# local imports
+from erc20_demurrage_token import DemurrageTokenSettings
+from erc20_demurrage_token.sim import DemurrageTokenSimulation
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+decay_per_minute = 0.000050105908373373 # equals approx 2% per month
+
+# parameters for simulation object
+settings = DemurrageTokenSettings()
+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
+chain = 'evm:foochain:42'
+cap = (10 ** 6) * (10 ** 12)
+
+# instantiate simulation
+sim = DemurrageTokenSimulation(chain, settings, redistribute=False, cap=cap, actors=10)
+
+# name the usual suspects
+alice = sim.actors[0]
+bob = sim.actors[1]
+carol = sim.actors[2]
+
+# mint and transfer (every single action advances one block, and one second in time)
+sim.mint(alice, sim.from_units(100)) # 10000000 tokens
+sim.mint(bob, sim.from_units(100))
+sim.transfer(alice, carol, sim.from_units(50))
+
+# check that balances have been updated
+assert sim.balance(alice) == sim.from_units(50)
+assert sim.balance(bob) == sim.from_units(100)
+assert sim.balance(carol) == sim.from_units(50)
+
+# advance to next redistribution period
+sim.next()
+
+# inspect balances
+print('alice balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(alice), sim.balance(alice, base=True)))
+print('bob balance:   demurraged {:>9d} base {:>9d}'.format(sim.balance(bob), sim.balance(bob, base=True)))
+print('carol balance: demurraged {:>9d} base {:>9d}'.format(sim.balance(carol), sim.balance(carol, base=True)))
+print('sink balance:  demurraged {:>9d} base {:>9d}'.format(sim.balance(sim.sink_address), sim.balance(sim.sink_address, base=True)))
+
+# get times
+minutes = sim.get_minutes()
+start = sim.get_now()
+timestamp = sim.get_start()
+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)
+frontend_demurrage = ((1 - decay_per_minute) ** minutes / 100)   # 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 {}
+contract demurrage {}
+demurrage delta {}""".format(
+    alice_checksum,
+    sim.balance(alice),
+    frontend_demurrage,
+    contract_demurrage,
+    demurrage_delta),
+)
+
+balance_sum = sim.balance(alice) + sim.balance(bob) + sim.balance(carol)
+print('sum of contract demurraged balances {}'.format(balance_sum))

python/tests/base.py

@@ -163,51 +163,3 @@ class TestDemurrageCap(TestDemurrage):
         self.deploy(c, self.mode)
 
         logg.info('deployed with mode {}'.format(self.mode))
-
-
-
-class TestDemurrageReal(TestDemurrage):
-
-    def setUp(self):
-        super(TestDemurrage, self).setUp()
-
-        self.tax_level = int(0.000050105908373373*(10**40))
-        self.period = 10800
-        self.period_seconds = self.period * 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
-        self.settings.period_minutes = 10800
-        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')
-        if self.mode == None:
-            self.mode = 'MultiNocap'
-        logg.debug('executing test setup default mode {}'.format(self.mode))
-
-        self.deploy(c, self.mode)
-
-        logg.info('deployed with mode {}'.format(self.mode))
-

python/tests/test_redistribution.py

@@ -8,7 +8,10 @@ import logging
 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
+from chainlib.eth.block import (
+        block_latest,
+        block_by_number,
+        )
 from chainlib.eth.address import to_checksum_address
 from hexathon import (
         strip_0x,
@@ -55,6 +58,12 @@ class TestRedistribution(TestDemurrageDefault):
 
         self.backend.time_travel(self.start_time + self.period_seconds + 1)
         
+        o = block_latest()
+        r = self.rpc.do(o)
+        o = block_by_number(r)
+        r = self.rpc.do(o)
+        self.assertEqual(r['timestamp'], self.start_time + self.period_seconds)
+
         (tx_hash, o) = c.change_period(self.address, self.accounts[1])
         r = self.rpc.do(o)
         o = receipt(tx_hash)