Fix pysha break

.gitignore

@@ -6,3 +6,5 @@ gmon.out
 *.egg-info
 .venv/
 .idea
+solidity/*.json
+solidity/*.bin

python/CHANGELOG

@@ -1,3 +1,33 @@
+* 0.7.5
+	- Factor out token publish method in unittest fixture
+* 0.7.4
+	- Add missing unittest module to python package
+* 0.7.3
+	- Add ERC5679Ext20 fills
+* 0.7.2
+	- Update python classifiers
+	- Upgrade to beta
+* 0.7.1
+	- Upgrade deps
+* 0.7.0
+	- Implement proper burner interface method
+* 0.6.2
+	- Add Giftable Token contract metadata
+* 0.6.1
+	- Add explicit burn (reduces supply) to giftable token
+* 0.6.0
+	- Add token expiry to giftable token
+* 0.5.6
+	- Remove name and symbol lookup
+	- Remove decimals lookup for raw output
+* 0.5.5
+	- Implement chainlib-gen for giftable token
+* 0.5.4
+	- Enable setting sender address on contract read calls
+* 0.5.3
+	- Fix giftable token cli commands
+* 0.5.2
+	- Add block height to balance call
 * 0.5.1
 	- Change license to AGPL3 and copyright waived to public domain
 * 0.5.0

python/MANIFEST.in

@@ -1 +1 @@
-include **/data/ERC20.json **/data/GiftableToken.json **/data/GiftableToken.bin *requirements.txt CHANGELOG LICENSE WAIVER WAIVER.asc
+include **/data/ERC20.json **/data/GiftableToken.json **/data/GiftableToken.bin *requirements.txt CHANGELOG LICENSE WAIVER WAIVER.asc **/data/.chainlib 

python/eth_erc20/runnable/balance.py

@@ -65,7 +65,7 @@ logg = logging.getLogger()
 
 arg_flags = ArgFlag()
 arg = Arg(arg_flags)
-flags = arg_flags.STD_READ | arg_flags.EXEC
+flags = arg_flags.STD_READ | arg_flags.EXEC | arg_flags.SENDER
 
 argparser = chainlib.eth.cli.ArgumentParser()
 argparser = process_args(argparser, arg, flags)
@@ -87,33 +87,28 @@ logg.debug('settings loaded:\n{}'.format(settings))
 def main():
     token_address = settings.get('EXEC')
     conn = settings.get('CONN')
+    sender_address = settings.get('SENDER_ADDRESS')
     g = ERC20(
             chain_spec=settings.get('CHAIN_SPEC'),
             gas_oracle=settings.get('GAS_ORACLE'),
             )
 
     # determine decimals
-    decimals_o = g.decimals(token_address)
+    if not config.get('_RAW'):
+        decimals_o = g.decimals(token_address, sender_address=sender_address)
         r = conn.do(decimals_o)
         decimals = int(strip_0x(r), 16)
         logg.info('decimals {}'.format(decimals))
 
-    name_o = g.name(token_address)
-    r = conn.do(name_o)
-    token_name = g.parse_name(r)
-    logg.info('name {}'.format(token_name))
-
-    symbol_o = g.symbol(token_address)
-    r = conn.do(symbol_o)
-    token_symbol = g.parse_symbol(r)
-    logg.info('symbol {}'.format(token_symbol))
-
     # get balance
-    balance_o = g.balance(token_address, settings.get('RECIPIENT'))
+    balance_o = g.balance(token_address, settings.get('RECIPIENT'), sender_address=sender_address)
     r = conn.do(balance_o)
    
     hx = strip_0x(r)
     balance_value = int(hx, 16)
+    if config.get('_RAW'):
+        logg.debug('balance {} = {}'.format(even(hx), balance_value))
+    else:
         logg.debug('balance {} = {} decimals {}'.format(even(hx), balance_value, decimals))
 
     balance_str = str(balance_value)

python/eth_erc20/runnable/info.py

@@ -74,7 +74,7 @@ def process_config_local(config, arg, args, flags):
 
 arg_flags = ArgFlag()
 arg = Arg(arg_flags)
-flags = arg_flags.STD_READ | arg_flags.EXEC | arg_flags.TAB
+flags = arg_flags.STD_READ | arg_flags.EXEC | arg_flags.TAB | arg_flags.SENDER 
 
 argparser = chainlib.eth.cli.ArgumentParser()
 argparser = process_args(argparser, arg, flags)
@@ -96,6 +96,7 @@ logg.debug('settings loaded:\n{}'.format(settings))
 def main():
     token_address = config.get('_CONTRACT')
     conn = settings.get('CONN')
+    sender_address = settings.get('SENDER_ADDRESS')
     g = ERC20(
             chain_spec=settings.get('CHAIN_SPEC'),
             gas_oracle=settings.get('GAS_ORACLE'),
@@ -104,7 +105,7 @@ def main():
     outkeys = config.get('_OUTARG')
 
     if not outkeys or 'address' in outkeys:
-        name_o = g.name(token_address)
+        name_o = g.name(token_address, sender_address=sender_address)
         r = conn.do(name_o)
         token_name = g.parse_name(r)
         s = ''
@@ -114,7 +115,7 @@ def main():
         print(s)
 
     if not outkeys or 'symbol' in outkeys:
-        symbol_o = g.symbol(token_address)
+        symbol_o = g.symbol(token_address, sender_address=sender_address)
         r = conn.do(symbol_o)
         token_symbol = g.parse_symbol(r)
         s = ''
@@ -124,7 +125,7 @@ def main():
         print(s)
 
     if not outkeys or 'decimals' in outkeys:
-        decimals_o = g.decimals(token_address)
+        decimals_o = g.decimals(token_address, sender_address=sender_address)
         r = conn.do(decimals_o)
         decimals = int(strip_0x(r), 16)
         s = ''
@@ -134,7 +135,7 @@ def main():
         print(s)
 
     if not outkeys or 'supply' in outkeys:
-        supply_o = g.total_supply(token_address)
+        supply_o = g.total_supply(token_address, sender_address=sender_address)
         r = conn.do(supply_o)
         supply = int(strip_0x(r), 16)
         s = ''

python/eth_erc20/unittest/__init__.py

@@ -0,0 +1 @@
+from .base import *

python/eth_erc20/unittest/base.py

@@ -0,0 +1,169 @@
+# standard imports
+import logging
+
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.gas import OverrideGasOracle
+from chainlib.eth.tx import (
+        transaction,
+        receipt,
+        )
+from hexathon import strip_0x
+
+# local imports
+from eth_erc20 import ERC20
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger(__name__)
+
+
+class TestInterface:
+
+    def test_balance(self):
+        c = ERC20(self.chain_spec)
+        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        balance = ERC20.parse_balance(r)
+        self.assertEqual(self.initial_supply, balance)
+
+
+    def test_supply(self):
+        c = ERC20(self.chain_spec)
+        o = c.total_supply(self.address, sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        supply = ERC20.parse_total_supply(r)
+        self.assertEqual(self.initial_supply, supply)
+
+
+    def test_name(self):
+        c = ERC20(self.chain_spec)
+        o = c.name(self.address, sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        name = ERC20.parse_name(r)
+        self.assertEqual(self.name, name)
+
+
+    def test_symbol(self):
+        c = ERC20(self.chain_spec)
+        o = c.symbol(self.address, sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        symbol = ERC20.parse_symbol(r)
+        self.assertEqual(self.symbol, symbol)
+
+
+    def test_direct_transfer(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
+        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
+
+        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 1000)
+        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[0], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, self.initial_supply - 1000)
+
+        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, 1000)
+
+        o = transaction(tx_hash)
+        r = self.rpc.do(o)
+        data = c.parse_transfer_request(r['data'])
+        self.assertEqual(data[0], strip_0x(self.accounts[1]))
+        self.assertEqual(data[1], 1000)
+
+
+    def test_transfer_from(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
+        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
+        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        allowance = c.parse_allowance(r)
+        self.assertEqual(allowance, 1000)
+
+        o = transaction(tx_hash)
+        r = self.rpc.do(o)
+        data = c.parse_approve_request(r['data'])
+        self.assertEqual(data[0], strip_0x(self.accounts[1]))
+        self.assertEqual(data[1], 1000)
+
+        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
+        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
+        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1001)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)
+
+        o = transaction(tx_hash)
+        r = self.rpc.do(o)
+        data = c.parse_transfer_from_request(r['data'])
+        self.assertEqual(data[0], strip_0x(self.accounts[0]))
+        self.assertEqual(data[1], strip_0x(self.accounts[2]))
+        self.assertEqual(data[2], 1001)
+
+        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1000)
+        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[0], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, self.initial_supply - 1000)
+
+        o = c.balance_of(self.address, self.accounts[2], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, 1000)
+
+
+    def test_revoke_approve(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
+        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
+        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+        
+        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 999)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)
+     
+        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 0)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+ 
+        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        allowance = c.parse_allowance(r)
+        self.assertEqual(allowance, 0)
+
+        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
+        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
+        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)

python/giftable_erc20_token/__init__.py

@@ -1 +1,4 @@
 from .factory import GiftableToken
+from .factory import bytecode
+from .factory import create
+from .factory import args

python/giftable_erc20_token/data/StaticToken.json

@@ -0,0 +1 @@
+[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"uint256","name":"_supply","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"TransferFrom","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

python/giftable_erc20_token/data/StaticToken.metadata.json

@@ -0,0 +1 @@
+{"compiler":{"version":"0.8.18+commit.87f61d96"},"language":"Solidity","output":{"abi":[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"uint256","name":"_supply","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"TransferFrom","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"StaticToken.sol":"StaticToken"},"evmVersion":"byzantium","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"StaticToken.sol":{"keccak256":"0xfb467ccf3465a3f2c8ad23bc4933f7e1ac1964d7ee1aa185e72e4698b015b5b3","license":"AGPL-3.0-or-later","urls":["bzz-raw://6c2230ba6ddadf062f5f3391f2a852da8617fbefd0c0511d9bc372c6c66c6424","dweb:/ipfs/QmWSYF3WxmKyDEHp3NZMWjE6Yu7mY6XVB6tuTeFKpjxL9P"]}},"version":1}

python/giftable_erc20_token/factory.py

@@ -12,28 +12,43 @@ from chainlib.eth.contract import (
         ABIContractEncoder,
         ABIContractType,
         )
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.jsonrpc import JSONRPCRequest
+from hexathon import add_0x
 
 # local imports
 from giftable_erc20_token.data import data_dir
+from eth_erc20 import ERC20
 
 logg = logging.getLogger(__name__)
 
 
-class GiftableToken(TxFactory):
+class GiftableToken(ERC20):
 
     __abi = None
     __bytecode = None
 
-    def constructor(self, sender_address, name, symbol, decimals, tx_format=TxFormat.JSONRPC):
+    def constructor(self, sender_address, name, symbol, decimals, expire=0, tx_format=TxFormat.JSONRPC, version=None):
-        code = GiftableToken.bytecode()
+        code = self.cargs(name, symbol, decimals, expire=expire)
+        tx = self.template(sender_address, None, use_nonce=True)
+        tx = self.set_code(tx, code)
+        return self.finalize(tx, tx_format)
+
+
+    @staticmethod
+    def cargs(name, symbol, decimals, expire=0, version=None):
+        if expire == None:
+            expire = 0
+        code = GiftableToken.bytecode(version=version)
         enc = ABIContractEncoder()
         enc.string(name)
         enc.string(symbol)
         enc.uint256(decimals)
-        code += enc.get()
+        enc.uint256(expire)
-        tx = self.template(sender_address, None, use_nonce=True)
+        args = enc.get()
-        tx = self.set_code(tx, code)
+        code += args
-        return self.finalize(tx, tx_format)
+        logg.debug('constructor code: ' + args)
+        return code
 
 
     @staticmethod
@@ -51,7 +66,7 @@ class GiftableToken(TxFactory):
 
 
     @staticmethod
-    def bytecode():
+    def bytecode(version=None):
         if GiftableToken.__bytecode == None:
             f = open(os.path.join(data_dir, 'GiftableToken.bin'))
             GiftableToken.__bytecode = f.read()
@@ -97,3 +112,59 @@ class GiftableToken(TxFactory):
         return tx
 
 
+    def burn(self, contract_address, sender_address, value, tx_format=TxFormat.JSONRPC):
+        enc = ABIContractEncoder()
+        enc.method('burn')
+        enc.typ(ABIContractType.UINT256)
+        enc.uint256(value)
+        data = enc.get()
+        tx = self.template(sender_address, contract_address, use_nonce=True)
+        tx = self.set_code(tx, data)
+        tx = self.finalize(tx, tx_format)
+        return tx
+
+
+    def burned(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
+        j = JSONRPCRequest(id_generator)
+        o = j.template()
+        o['method'] = 'eth_call'
+        enc = ABIContractEncoder()
+        enc.method('totalBurned')
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address)
+        tx = self.set_code(tx, data)
+        o['params'].append(self.normalize(tx))
+        o['params'].append('latest')
+        o = j.finalize(o)
+        return o
+
+
+    def total_minted(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
+        j = JSONRPCRequest(id_generator)
+        o = j.template()
+        o['method'] = 'eth_call'
+        enc = ABIContractEncoder()
+        enc.method('totalMinted')
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address)
+        tx = self.set_code(tx, data)
+        o['params'].append(self.normalize(tx))
+        o['params'].append('latest')
+        o = j.finalize(o)
+        return o
+
+
+def bytecode(**kwargs):
+    return GiftableToken.bytecode(version=kwargs.get('version'))
+
+
+def create(**kwargs):
+    return GiftableToken.cargs(kwargs['name'], kwargs['symbol'], kwargs['decimals'], expire=kwargs.get('expire'), version=kwargs.get('version'))
+
+
+def args(v):
+    if v == 'create':
+        return (['name', 'symbol', 'decimals'], ['expire', 'version'],)
+    elif v == 'default' or v == 'bytecode':
+        return ([], ['version'],)
+    raise ValueError('unknown command: ' + v)

python/giftable_erc20_token/runnable/publish.py

@@ -45,6 +45,7 @@ def process_config_local(config, arg, args, flags):
     config.add(args.token_name, '_TOKEN_NAME', False)
     config.add(args.token_symbol, '_TOKEN_SYMBOL', False)
     config.add(args.token_decimals, '_TOKEN_DECIMALS', False)
+    config.add(args.token_expire, '_TOKEN_EXPIRE', False)
     return config
 
 
@@ -57,6 +58,7 @@ argparser = process_args(argparser, arg, flags)
 argparser.add_argument('--name', dest='token_name', required=True, type=str, help='Token name')
 argparser.add_argument('--symbol', dest='token_symbol', required=True, type=str, help='Token symbol')
 argparser.add_argument('--decimals', dest='token_decimals', default=18, type=int, help='Token decimals')
+argparser.add_argument('--expire', dest='token_expire', default=0, type=int, help='Token expiry timestamp (after which token cannot be traded)')
 args = argparser.parse_args()
 
 logg = process_log(args, logg)
@@ -87,6 +89,7 @@ def main():
             config.get('_TOKEN_NAME'),
             config.get('_TOKEN_SYMBOL'),
             config.get('_TOKEN_DECIMALS'),
+            expire=config.get('_TOKEN_EXPIRE'),
             )
     if settings.get('RPC_SEND'):
         conn.do(o)

python/giftable_erc20_token/unittest/__init__.py

@@ -0,0 +1 @@
+from .base import *

python/giftable_erc20_token/unittest/base.py

@@ -0,0 +1,59 @@
+# standard imports
+import logging
+import time
+
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.connection import RPCConnection
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.address import to_checksum_address
+
+# local imports
+from giftable_erc20_token import GiftableToken
+
+logg = logging.getLogger(__name__)
+
+
+class TestGiftableToken(EthTesterCase):
+
+    expire = 0
+
+    def setUp(self):
+        super(TestGiftableToken, self).setUp()
+        self.conn = RPCConnection.connect(self.chain_spec, 'default')
+       
+        address = self.publish_giftable_token('Foo Token', 'FOO', 16, expire=self.expire)
+        self.address = to_checksum_address(address)
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        self.initial_supply = 1 << 40
+        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], self.initial_supply)
+        r = self.conn.do(o)
+        o = receipt(tx_hash)
+        r = self.conn.do(o)
+        self.assertEqual(r['status'], 1)
+
+
+    def publish_giftable_token(self, name, symbol, decimals=16, expire=None):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        self.symbol = name
+        self.name = symbol
+        self.decimals = decimals
+        (tx_hash, o) = c.constructor(self.accounts[0], self.name, self.symbol, self.decimals, expire=expire)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+        address = r['contract_address'] 
+        logg.debug('published on address {} with hash {}'.format(address, tx_hash))
+        return address
+
+
+class TestGiftableExpireToken(TestGiftableToken):
+
+    expire = int(time.time()) + 100000
+
+    def setUp(self):
+        super(TestGiftableExpireToken, self).setUp()

python/requirements.txt

@@ -1,3 +1,4 @@
 confini~=0.6.1
-chainlib-eth~=0.4.2
+chainlib-eth~=0.6.0
+chainlib~=0.5.0
 potaahto~=0.1.1

python/run_tests.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+export PYTHONPATH=${PYTHONPATH}:.
+>&2 echo "using pythonpath $PYTHONPATH"
+
 set -e
 set -x
 for f in `ls tests/*.py`; do

python/setup.cfg

@@ -1,10 +1,10 @@
 [metadata]
 name = eth-erc20
-version = 0.5.3
+version = 0.9.0
 description = ERC20 interface and simple contract with deployment script that lets any address mint and gift itself tokens.
 author = Louis Holbrook
 author_email = dev@holbrook.no
-url = https://git.defalsify.org/eth-erc20.git
+url = https://git.defalsify.org/eth-erc20
 keywords =
 	dlt
 	ethereum
@@ -14,11 +14,12 @@ keywords =
 classifiers =
 	Programming Language :: Python :: 3
 	Operating System :: OS Independent
-	Development Status :: 3 - Alpha
+	Development Status :: 4 - Beta
-	Environment :: No Input/Output (Daemon)
+	Environment :: Console
 	Intended Audience :: Developers
 	License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
 	Topic :: Internet
+	Topic :: Software Development :: Libraries
 	#Topic :: Blockchain :: EVM
 license = AGPLv3+
 licence_files =
@@ -26,14 +27,16 @@ licence_files =
 
 [options]
 include_package_data = True
-python_requires = >= 3.7
+python_requires = >= 3.8
 packages =
 	giftable_erc20_token
 	giftable_erc20_token.runnable
+	giftable_erc20_token.unittest
 	giftable_erc20_token.data
 	eth_erc20
 	eth_erc20.data
 	eth_erc20.runnable
+	eth_erc20.unittest
 	static_token.data
 
 [options.package_data]
@@ -46,9 +49,8 @@ packages =
 
 [options.entry_points]
 console_scripts =
-	giftable-token-deploy = giftable_erc20_token.runnable.deploy:main
+	giftable-token-publish = giftable_erc20_token.runnable.publish:main
 	giftable-token-gift = giftable_erc20_token.runnable.gift:main
-	giftable-token-minter = giftable_erc20_token.runnable.minter:main
 	erc20-transfer = eth_erc20.runnable.transfer:main
 	erc20-balance = eth_erc20.runnable.balance:main
 	erc20-info = eth_erc20.runnable.info:main

python/static_token/__init__.py

@@ -0,0 +1 @@
+from .factory import *

python/static_token/data/__init__.py

@@ -0,0 +1,3 @@
+import os
+
+data_dir = os.path.realpath(os.path.dirname(__file__))

python/static_token/factory.py

@@ -0,0 +1,60 @@
+# standard imports
+import os
+import logging
+
+# external imports
+from chainlib.eth.tx import (
+        TxFactory,
+        TxFormat,
+        )
+from chainlib.hash import keccak256_string_to_hex
+from chainlib.eth.contract import (
+        ABIContractEncoder,
+        ABIContractType,
+        )
+
+# local imports
+from static_token.data import data_dir
+
+logg = logging.getLogger(__name__)
+
+
+class StaticToken(TxFactory):
+
+    __abi = None
+    __bytecode = None
+
+    def constructor(self, sender_address, name, symbol, decimals, supply, tx_format=TxFormat.JSONRPC):
+        code = StaticToken.bytecode()
+        enc = ABIContractEncoder()
+        enc.string(name)
+        enc.string(symbol)
+        enc.uint256(decimals)
+        enc.uint256(supply)
+        code += enc.get()
+        tx = self.template(sender_address, None, use_nonce=True)
+        tx = self.set_code(tx, code)
+        return self.finalize(tx, tx_format)
+
+
+    @staticmethod
+    def gas(code=None):
+        return 2000000
+
+
+    @staticmethod
+    def abi():
+        if StaticToken.__abi == None:
+            f = open(os.path.join(data_dir, 'StaticToken.json'), 'r')
+            StaticToken.__abi = json.load(f)
+            f.close()
+        return StaticToken.__abi
+
+
+    @staticmethod
+    def bytecode():
+        if StaticToken.__bytecode == None:
+            f = open(os.path.join(data_dir, 'StaticToken.bin'))
+            StaticToken.__bytecode = f.read()
+            f.close()
+        return StaticToken.__bytecode

python/static_token/unittest/__init__.py

@@ -0,0 +1 @@
+from .base import TestStaticToken

python/static_token/unittest/base.py

@@ -0,0 +1,36 @@
+# standard imports
+import logging
+import time
+
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.connection import RPCConnection
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from chainlib.eth.address import to_checksum_address
+
+# local imports
+from static_token import StaticToken
+from eth_erc20.unittest import TestInterface
+
+logg = logging.getLogger(__name__)
+
+
+class TestStaticToken(EthTesterCase, TestInterface):
+
+    def setUp(self):
+        super(TestStaticToken, self).setUp()
+        self.conn = RPCConnection.connect(self.chain_spec, 'default')
+        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
+        c = StaticToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        self.symbol = 'FOO'
+        self.name = 'Foo Token'
+        self.decimals = 16
+        self.initial_supply = 1 << 24
+        (tx_hash, o) = c.constructor(self.accounts[0], self.name, self.symbol, self.decimals, self.initial_supply)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+        self.address = to_checksum_address(r['contract_address'])
+        logg.debug('published statictoken on address {} with hash {}'.format(self.address, tx_hash))

python/test_requirements.txt

@@ -1,3 +1,3 @@
-eth_tester==0.5.0b3
+eth_tester==0.10.0b4
-py-evm==0.3.0a20
+py-evm==0.10.0b4
 pytest==6.0.1

python/tests/test_erc20_interface.py

@@ -1,200 +1,13 @@
-# standard imports
+# import logging
-import logging
 import unittest
 
-# external imports
-from chainlib.eth.unittest.ethtester import EthTesterCase
-from chainlib.connection import RPCConnection
-from chainlib.eth.nonce import RPCNonceOracle
-from chainlib.eth.gas import OverrideGasOracle
-from chainlib.eth.tx import (
-        transaction,
-        receipt,
-        )
-from chainlib.eth.address import to_checksum_address
-from hexathon import strip_0x
-
 # local imports
-from giftable_erc20_token import GiftableToken
+from giftable_erc20_token.unittest import TestGiftableToken
-from eth_erc20 import ERC20
+from eth_erc20.unittest import TestInterface
-
-logging.basicConfig(level=logging.DEBUG)
-logg = logging.getLogger(__name__)
 
 
-class TestToken(EthTesterCase):
+class TestBasic(TestGiftableToken, TestInterface):
-
+    pass
-    def setUp(self):
-        super(TestToken, self).setUp()
-        self.conn = RPCConnection.connect(self.chain_spec, 'default')
-        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
-        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
-        self.symbol = 'FOO'
-        self.name = 'Foo Token'
-        self.decimals = 16
-        (tx_hash, o) = c.constructor(self.accounts[0], self.name, self.symbol, self.decimals)
-        r = self.conn.do(o)
-        logg.debug('deployed with hash {}'.format(r))
-        
-        o = receipt(r)
-        r = self.conn.do(o)
-        self.address = to_checksum_address(r['contract_address'])
-
-        self.initial_supply = 1 << 40
-        (tx_hash, o) = c.mint_to(self.address, self.accounts[0], self.accounts[0], self.initial_supply)
-        r = self.conn.do(o)
-        o = receipt(tx_hash)
-        r = self.conn.do(o)
-        self.assertEqual(r['status'], 1)
-
-
-    def test_balance(self):
-        c = ERC20(self.chain_spec)
-        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
-        r = self.conn.do(o)
-        balance = ERC20.parse_balance(r)
-        self.assertEqual(self.initial_supply, balance)
-
-
-    def test_supply(self):
-        c = ERC20(self.chain_spec)
-        o = c.total_supply(self.address, sender_address=self.accounts[0])
-        r = self.conn.do(o)
-        supply = ERC20.parse_total_supply(r)
-        self.assertEqual(self.initial_supply, supply)
-
-
-    def test_name(self):
-        c = ERC20(self.chain_spec)
-        o = c.name(self.address, sender_address=self.accounts[0])
-        r = self.conn.do(o)
-        name = ERC20.parse_name(r)
-        self.assertEqual(self.name, name)
-
-
-    def test_symbol(self):
-        c = ERC20(self.chain_spec)
-        o = c.symbol(self.address, sender_address=self.accounts[0])
-        r = self.conn.do(o)
-        symbol = ERC20.parse_symbol(r)
-        self.assertEqual(self.symbol, symbol)
-
-
-    def test_transfer(self):
-        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
-        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
-        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
-        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 1000)
-        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[0], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        balance = c.parse_balance(r)
-        self.assertEqual(balance, self.initial_supply - 1000)
-
-        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        balance = c.parse_balance(r)
-        self.assertEqual(balance, 1000)
-
-        o = transaction(tx_hash)
-        r = self.rpc.do(o)
-        data = c.parse_transfer_request(r['data'])
-        self.assertEqual(data[0], strip_0x(self.accounts[1]))
-        self.assertEqual(data[1], 1000)
-
-
-    def test_transfer_from(self):
-        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
-        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
-        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
-        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 1)
-
-        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        allowance = c.parse_allowance(r)
-        self.assertEqual(allowance, 1000)
-
-        o = transaction(tx_hash)
-        r = self.rpc.do(o)
-        data = c.parse_approve_request(r['data'])
-        self.assertEqual(data[0], strip_0x(self.accounts[1]))
-        self.assertEqual(data[1], 1000)
-
-        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
-        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
-        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1001)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 0)
-
-        o = transaction(tx_hash)
-        r = self.rpc.do(o)
-        data = c.parse_transfer_from_request(r['data'])
-        self.assertEqual(data[0], strip_0x(self.accounts[0]))
-        self.assertEqual(data[1], strip_0x(self.accounts[2]))
-        self.assertEqual(data[2], 1001)
-
-        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1000)
-        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[0], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        balance = c.parse_balance(r)
-        self.assertEqual(balance, self.initial_supply - 1000)
-
-        o = c.balance_of(self.address, self.accounts[2], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        balance = c.parse_balance(r)
-        self.assertEqual(balance, 1000)
-
-
-    def test_revoke_approve(self):
-        nonce_oracle = RPCNonceOracle(self.accounts[0], conn=self.conn)
-        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
-        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
-        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 1000)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 1)
-        
-        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 999)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 0)
-     
-        (tx_hash, o) = c.approve(self.address, self.accounts[0], self.accounts[1], 0)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 1)
- 
-        o = c.allowance(self.address, self.accounts[0], self.accounts[1], sender_address=self.accounts[0])
-        r = self.rpc.do(o)
-        allowance = c.parse_allowance(r)
-        self.assertEqual(allowance, 0)
-
-        nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
-        c = ERC20(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
-        (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1)
-        r = self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 0)
-
 
 
 if __name__ == '__main__':

python/tests/test_giftable.py

@@ -0,0 +1,123 @@
+# standard imports
+import os
+import unittest
+import json
+import logging
+import datetime
+
+# 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,
+    )
+
+# local imports
+from giftable_erc20_token import GiftableToken
+from giftable_erc20_token.unittest import TestGiftableExpireToken
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+testdir = os.path.dirname(__file__)
+
+
+class TestExpire(TestGiftableExpireToken):
+
+    def setUp(self):
+        super(TestExpire, self).setUp()
+
+
+    def test_expires(self):
+        mint_amount = self.initial_supply
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], int(mint_amount / 2))
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        self.backend.time_travel(self.expire + 60)
+        o = block_latest()
+        r = self.rpc.do(o)
+        o = block_by_number(r)
+        r = self.rpc.do(o)
+        self.assertGreaterEqual(r['timestamp'], self.expire)
+        
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash, o) = c.transfer(self.address, self.accounts[0], self.accounts[1], 1)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)
+        
+        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash, o) = c.transfer(self.address, self.accounts[1], self.accounts[0], 1)
+        r = self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)
+
+        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, int(mint_amount / 2))
+
+        o = c.balance_of(self.address, self.accounts[1], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance += c.parse_balance(r)
+        self.assertEqual(balance, mint_amount)
+
+        o = c.total_supply(self.address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        supply = c.parse_balance(r)
+        self.assertEqual(supply, mint_amount)
+
+
+    def test_burn(self):
+        mint_amount = self.initial_supply
+        nonce_oracle = RPCNonceOracle(self.accounts[1], self.rpc)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash, o) = c.burn(self.address, self.accounts[1], int(mint_amount / 4))
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 0)
+
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        c = GiftableToken(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        (tx_hash, o) = c.burn(self.address, self.accounts[0], int(mint_amount / 4))
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        o = c.burned(self.address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        burned = c.parse_balance(r)
+        self.assertEqual(burned, int(mint_amount / 4))
+
+        o = c.balance_of(self.address, self.accounts[0], sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, mint_amount - burned)
+
+        o = c.total_supply(self.address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, mint_amount - burned)
+
+        o = c.total_minted(self.address, sender_address=self.accounts[0])
+        r = self.rpc.do(o)
+        balance = c.parse_balance(r)
+        self.assertEqual(balance, mint_amount)
+
+
+if __name__ == '__main__':
+    unittest.main()

python/tests/test_static.py

@@ -0,0 +1,38 @@
+# standard imports
+import os
+import unittest
+import json
+import logging
+import datetime
+
+# 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,
+    )
+
+# local imports
+from static_token import StaticToken
+from static_token.unittest import TestStaticToken
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+testdir = os.path.dirname(__file__)
+
+
+class TestExpire(TestStaticToken):
+
+    def setUp(self):
+        super(TestExpire, self).setUp()
+
+
+    def test_static_interface(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()

solidity/GiftableToken.sol

@@ -1,12 +1,15 @@
-pragma solidity >=0.6.11;
+pragma solidity >=0.8.0;
 
-// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0-or-later
-// File-Version: 2
+// File-Version: 3
 
 contract GiftableToken {
 
+	// Implements EIP173
 	address public owner;
-	mapping(address => bool) minters;
+
+	// Implements Writer
+	mapping(address => bool) writer;
 
 	// Implements ERC20
 	string public name;
@@ -15,54 +18,117 @@ contract GiftableToken {
 	// Implements ERC20
 	uint8 public decimals;
 	// Implements ERC20
-	uint256 public totalSupply;
-	// Implements ERC20
 	mapping (address => uint256) public balanceOf;
 	// Implements ERC20
 	mapping (address => mapping (address => uint256)) public allowance;
 
+	// Implements Burner
+	uint256 public totalMinted;
+	// Implements Burner
+	uint256 public totalBurned;
+
+	// Implements Expire
+	uint256 public expires;
+	bool expired;
+
+	// Implements ERC20
 	event Transfer(address indexed _from, address indexed _to, uint256 _value);
+	// Implements ERC20
 	event TransferFrom(address indexed _from, address indexed _to, address indexed _spender, uint256 _value);
+	// Implements ERC20
 	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
+
+	// Implements Minter
 	event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value);
 
-	constructor(string memory _name, string memory _symbol, uint8 _decimals) public {
+	// Implement Expire
+	event Expired(uint256 _timestamp);
+
+	// Implements Writer
+	event WriterAdded(address _writer);
+	// Implements Writer
+	event WriterRemoved(address _writer);
+
+	// Implements Burner
+	event Burn(uint256 _value);
+
+	constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _expireTimestamp) {
 		owner = msg.sender;
 		name = _name;
 		symbol = _symbol;
 		decimals = _decimals;
-		minters[msg.sender] = true;
+		expires = _expireTimestamp;
 	}
 
+	// Implements ERC20
+	function totalSupply() public view returns (uint256) {
+		return totalMinted - totalBurned;
+	}
+
+	mapping(address => bool) writers;
+
+	// Implements Minter
 	function mintTo(address _to, uint256 _value) public returns (bool) {
-		require(minters[msg.sender]);
+		require(writers[msg.sender] || msg.sender == owner);
 
 		balanceOf[_to] += _value;
-		totalSupply += _value;
+		totalMinted += _value;
 
 		emit Mint(msg.sender, _to, _value);
 
 		return true;
 	}
 
-	function addMinter(address _minter) public returns (bool) {
+	// Implements Minter
+	// Implements ERC5679Ext20
+	function mint(address _to, uint256 _value, bytes calldata _data) public {
+		_data;
+		mintTo(_to, _value);
+	}
+
+	// Implements Writer
+	function addWriter(address _minter) public returns (bool) {
 		require(msg.sender == owner);
 
-		minters[_minter] = true;
+		writers[_minter] = true;
 
 		return true;
 	}
 
-	function removeMinter(address _minter) public returns (bool) {
+	// Implements Writer
+	function deleteWriter(address _minter) public returns (bool) {
 		require(msg.sender == owner || msg.sender == _minter);
 
-		minters[_minter] = false;
+		writers[_minter] = false;
 
 		return true;
 	}
 
+	// Implements Writer
+	function isWriter(address _minter) public view returns(bool) {
+		return writers[_minter] || _minter == owner;
+	}
+
+	// Implements Expire
+	function applyExpiry() public returns(uint8) {
+		if (expires == 0) {
+			return 0;
+		}
+		if (expired) {
+			return 1;
+		}
+		if (block.timestamp >= expires) {
+			expired = true;
+			emit Expired(block.timestamp);
+			return 2;
+		}
+		return 0;
+
+	}
+
 	// Implements ERC20
 	function transfer(address _to, uint256 _value) public returns (bool) {
+		require(applyExpiry() == 0);
 		require(balanceOf[msg.sender] >= _value);
 		balanceOf[msg.sender] -= _value; 
 		balanceOf[_to] += _value;
@@ -70,8 +136,34 @@ contract GiftableToken {
 		return true;
 	}
 
+	// Implements Burner
+	function burn(uint256 _value) public returns (bool) {
+		require(msg.sender == owner, 'ERR_ACCESS');
+		require(balanceOf[msg.sender] >= _value, 'ERR_FUNDS');
+
+		balanceOf[msg.sender] -= _value;
+		totalBurned += _value;
+
+		emit Burn(_value);
+		return true;
+	}
+
+	// Implements Burner
+	function burn() public returns(bool) {
+		return burn(balanceOf[msg.sender]);
+	}
+
+	// Implements Burner
+	// Implements ERC5679Ext20
+	function burn(address _from, uint256 _value, bytes calldata _data) public {
+		require(msg.sender == _from, 'ERR_NOT_SELF');
+		_data;
+		burn(_value);
+	}
+
 	// Implements ERC20
 	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
+		require(applyExpiry() == 0);
 		require(allowance[_from][msg.sender] >= _value);
 		require(balanceOf[_from] >= _value);
 		allowance[_from][msg.sender] = allowance[_from][msg.sender] - _value;
@@ -83,6 +175,7 @@ contract GiftableToken {
 
 	// Implements ERC20
 	function approve(address _spender, uint256 _value) public returns (bool) {
+		require(applyExpiry() == 0);
 		if (_value > 0) {
 			require(allowance[msg.sender][_spender] == 0);
 		}
@@ -95,11 +188,12 @@ contract GiftableToken {
 	function transferOwnership(address _newOwner) public returns (bool) {
 		require(msg.sender == owner);
 		owner = _newOwner;
+		return true;
 	}
 
 	// Implements EIP165
-	function supportsInterface(bytes4 _sum) public returns (bool) {
+	function supportsInterface(bytes4 _sum) public pure returns (bool) {
-		if (_sum == 0xc6bb4b70) { // ERC20
+		if (_sum == 0xb61bc941) { // ERC20
 			return true;
 		}
 		if (_sum == 0x449a52f8) { // Minter
@@ -111,6 +205,15 @@ contract GiftableToken {
 		if (_sum == 0x9493f8b2) { // EIP173
 			return true;
 		}
+		if (_sum == 0xabe1f1f5) { // Writer
+			return true;
+		}
+		if (_sum == 0xb1110c1b) { // Burner
+			return true;
+		}
+		if (_sum == 0x841a0e94) { // Expire
+			return true;
+		}
 		return false;
 	}
 }

solidity/Makefile

@@ -2,13 +2,15 @@ SOLC = /usr/bin/solc
 
 all:
 	$(SOLC) --bin GiftableToken.sol --evm-version byzantium | awk 'NR>3' > GiftableToken.bin
-	truncate -s -1 GiftableToken.bin
 	$(SOLC) --abi GiftableToken.sol --evm-version byzantium | awk 'NR>3' > GiftableToken.json
+	$(SOLC) --metadata GiftableToken.sol --evm-version byzantium | awk 'NR>3' > GiftableToken.metadata.json
 	$(SOLC) --bin StaticToken.sol --evm-version byzantium | awk 'NR>3' > StaticToken.bin
-	truncate -s -1 StaticToken.bin
 	$(SOLC) --abi StaticToken.sol --evm-version byzantium | awk 'NR>3' > StaticToken.json
+	$(SOLC) --metadata StaticToken.sol --evm-version byzantium | awk 'NR>3' > StaticToken.metadata.json
+	truncate -s -1 StaticToken.bin
+	truncate -s -1 GiftableToken.bin
 
 install: all
-	cp -v Giftable*{json,bin} ../python/giftable_erc20_token/data/
+	cp -v *.json ../python/giftable_erc20_token/data/
-	cp -v Static*{json,bin} ../python/static_token/data/
+	cp -v *.bin ../python/giftable_erc20_token/data/
 

solidity/StaticToken.json

@@ -1 +1 @@
-[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"uint256","name":"_supply","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"TransferFrom","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
+[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"uint256","name":"_supply","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"},{"indexed":true,"internalType":"address","name":"_spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"TransferFrom","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_sum","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

solidity/StaticToken.sol

@@ -1,6 +1,6 @@
-pragma solidity >0.6.11;
+pragma solidity >=0.8.0;
 
-// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-License-Identifier: AGPL-3.0-or-later
 
 contract StaticToken {
 
@@ -20,11 +20,14 @@ contract StaticToken {
 	// Implements ERC20
 	mapping (address => mapping (address => uint256)) public allowance;
 
+	// Implements ERC20
 	event Transfer(address indexed _from, address indexed _to, uint256 _value);
+	// Implements ERC20
 	event TransferFrom(address indexed _from, address indexed _to, address indexed _spender, uint256 _value);
+	// Implements ERC20
 	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
 
-	constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _supply) public {
+	constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _supply) {
 		owner = msg.sender;
 		name = _name;
 		symbol = _symbol;
@@ -64,8 +67,8 @@ contract StaticToken {
 	}
 
 	// Implements EIP165
-	function supportsInterface(bytes4 _sum) public returns (bool) {
+	function supportsInterface(bytes4 _sum) public pure returns (bool) {
-		if (_sum == 0xc6bb4b70) { // ERC20
+		if (_sum == 0xb61bc941) { // ERC20
 			return true;
 		}
 		if (_sum == 0x01ffc9a7) { // EIP165