Improve resolution in fractional calc in contract

python/examples/sim_noredistribute.py

@@ -8,7 +8,7 @@ from erc20_demurrage_token.sim import DemurrageTokenSimulation
 logging.basicConfig(level=logging.INFO)
 logg = logging.getLogger()
 
-decay_per_minute = 0.00000050105908373373 # equals approx 2% per month
+decay_per_minute = 0.00050105908373373 # equals approx 2% per month
 
 # parameters for simulation object
 settings = DemurrageTokenSettings()
@@ -17,7 +17,7 @@ settings.symbol = 'SIM'
 settings.decimals = 6
 settings.demurrage_level = int(decay_per_minute*(10**38))
 #settings.period_minutes = 1 # 1 week in minutes
-settings.period_minutes = 60*24*7*4
+settings.period_minutes = 60*24*7
 chain = 'evm:foochain:42'
 cap = (10 ** 6) * (10 ** 12)
 

python/tests/test_basic.py

@@ -39,6 +39,21 @@ class TestBasic(TestDemurrageDefault):
         r = self.rpc.do(o)
 
 
+    def test_balance(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], 1024)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        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, 1024)
+
+
     def test_apply_demurrage(self):
         modifier = 10 * (10 ** 37)