Create demurrage calc from contract

python/erc20_demurrage_token/demurrage.py

@@ -1,8 +1,14 @@
-#
+# standard imports
 import logging
 import datetime
 import math
 
+# eternal imports
+from chainlib.eth.constant import ZERO_ADDRESS
+
+# local imports
+from .token import DemurrageToken
+
 logging.basicConfig(level=logging.DEBUG)
 logg = logging.getLogger()
 
@@ -36,3 +42,18 @@ class DemurrageCalculator:
         logg.debug('adjusted for {} hours {} -> {} delta {}'.format(remainder_minutes, amount, adjusted_amount, adjusted_delta))
 
         return adjusted_amount
+
+
+    @staticmethod
+    def from_contract(rpc, chain_spec, contract_address, sender_address=ZERO_ADDRESS):
+        c = DemurrageToken(chain_spec)
+        o = c.tax_level(contract_address, sender_address=sender_address)
+        r = rpc.do(o)
+        taxlevel_i = c.parse_tax_level(r)
+
+        o = c.resolution_factor(contract_address, sender_address=sender_address)
+        r = rpc.do(o)
+        divider = c.parse_resolution_factor(r)
+        logg.debug('taxlevel {} f {}'.format(taxlevel_i, divider))
+        taxlevel_f = taxlevel_i / divider
+        return DemurrageCalculator(taxlevel_f)

python/erc20_demurrage_token/token.py

@@ -343,7 +343,15 @@ class DemurrageToken(ERC20):
         tx = self.set_code(tx, data)
         tx = self.finalize(tx, tx_format)
         return tx
-    
+
+
+    def tax_level(self, contract_address, sender_address=ZERO_ADDRESS):
+        return self.call_noarg('taxLevel', contract_address, sender_address=sender_address)
+
+
+    def resolution_factor(self, contract_address, sender_address=ZERO_ADDRESS):
+        return self.call_noarg('resolutionFactor', contract_address, sender_address=sender_address)
+
 
     def actual_period(self, contract_address, sender_address=ZERO_ADDRESS):
         return self.call_noarg('actualPeriod', contract_address, sender_address=sender_address)
@@ -507,3 +515,13 @@ class DemurrageToken(ERC20):
     @classmethod
     def parse_get_distribution(self, v):
         return abi_decode_single(ABIContractType.UINT256, v)
+
+
+    @classmethod
+    def parse_tax_level(self, v):
+        return abi_decode_single(ABIContractType.UINT256, v)
+
+
+    @classmethod
+    def parse_resolution_factor(self, v):
+        return abi_decode_single(ABIContractType.UINT256, v)

python/run_tests.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+
+export PYTHONPATH=.
+
+#modes=(MultiNocap MultiCap SingleCap SingleNocap)
+modes=(SingleCap 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=$m python tests/test_growth.py
+	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_amounts.py
+	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_single.py
+done
+
+modes=(SingleCap) # other contracts need to be updted
+for m in ${modes[@]}; do
+	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_period.py
+	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution_unit.py
+done
+
+modes=(MultiCap SingleCap)
+for m in ${modes[@]}; do
+	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_cap.py
+done
+
+#modes=(MultiCap MultiNocap)
+#for m in ${modes[@]}; do
+#	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_remainder.py
+#	ERC20_DEMURRAGE_TOKEN_TEST_MODE=$m python tests/test_redistribution.py
+#done
+
+set +e

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = erc20-demurrage-token
-version = 0.0.2a1
+version = 0.0.2a2
 description = ERC20 token with redistributed continual demurrage
 author = Louis Holbrook
 author_email = dev@holbrook.no

python/tests/test_demurrage_ext.py

@@ -2,7 +2,11 @@
 import datetime
 import unittest
 
+# external imports
+from chainlib.eth.nonce import RPCNonceOracle
+
 # local imports
+from erc20_demurrage_token import DemurrageToken
 from erc20_demurrage_token.demurrage import DemurrageCalculator
 
 # test imports
@@ -19,5 +23,13 @@ class TestEmulate(TestDemurrage):
         self.assert_within_lower(a, 99.69667, 0.1)
 
 
+    def test_from_contract(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = DemurrageToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        self.deploy(c, 'SingleNocap')
+        dc = DemurrageCalculator.from_contract(self.rpc, self.chain_spec, self.address, sender_address=self.accounts[0])
+        self.assertEqual(dc.r_min, 0.02)
+
+
 if __name__ == '__main__':
     unittest.main()

solidity/DemurrageTokenMultiCap.sol

@@ -61,6 +61,9 @@ contract DemurrageTokenMultiCap {
 	// (this constant x 1000000 is contained within 128 bits)
 	uint256 constant ppmDivider = 100000000000000000000000000000000;
 
+	// demurrage decimal width; 38 places
+	uint256 public immutable resolutionFactor = ppmDivider * 1000000;
+
 	// Timestamp of start of periods (time which contract constructor was called)
 	uint256 public immutable periodStart;
 

solidity/DemurrageTokenMultiNocap.sol

@@ -56,6 +56,9 @@ contract DemurrageTokenMultiNocap {
 	// (this constant x 1000000 is contained within 128 bits)
 	uint256 constant ppmDivider = 100000000000000000000000000000000;
 
+	// demurrage decimal width; 38 places
+	uint256 public immutable resolutionFactor = ppmDivider * 1000000;
+
 	// Timestamp of start of periods (time which contract constructor was called)
 	uint256 public immutable periodStart;
 

solidity/DemurrageTokenSingleCap.sol

@@ -56,7 +56,7 @@ contract DemurrageTokenSingleCap {
 	uint256 constant growthResolutionFactor = 1000000000000;
 
 	// demurrage decimal width; 38 places
-	uint256 immutable resolutionFactor = nanoDivider * growthResolutionFactor; 
+	uint256 public immutable resolutionFactor = nanoDivider * growthResolutionFactor; 
 
 	// Timestamp of start of periods (time which contract constructor was called)
 	uint256 public immutable periodStart;

solidity/DemurrageTokenSingleNocap.sol

@@ -53,7 +53,7 @@ contract DemurrageTokenSingleCap {
 	uint256 constant growthResolutionFactor = 1000000000000;
 
 	// demurrage decimal width; 38 places
-	uint256 immutable resolutionFactor = nanoDivider * growthResolutionFactor; 
+	uint256 public immutable resolutionFactor = nanoDivider * growthResolutionFactor; 
 
 	// Timestamp of start of periods (time which contract constructor was called)
 	uint256 public immutable periodStart;