Add info cli command

.gitignore

@@ -5,4 +5,3 @@ build/
 gmon.out
 *.egg-info
 .venv/
-.idea

.gitlab-ci.yml

@@ -1,67 +1,26 @@
 stages:
   - test
-  - run-coverage
   - slither-analyzer
 
-
-variables:
-  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
-
-cache:
-  paths:
-    - .cache/pip
-    - venv/
-
-before_script:
-  - python -V               # Print out python version for debugging
-  - pip install virtualenv
-  - virtualenv venv
-  - source venv/bin/activate
-
 test:
-  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest
+  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-py-alpine:latest
+  cache:
+  - key:
+      files:
+        - requirements.txt 
+        - test_requirements.txt
+    paths:
+      -  /root/.cache/pip 
   script: 
-      # build abi
-      - 'echo "Running Solc Version: $(solc --version)"'
-      - cd solidity 
-      - solc --evm-version=byzantium GiftableToken.sol --abi | awk 'NR>3' > GiftableToken.abi.json
-      # build bin
-      - solc GiftableToken.sol --bin | awk 'NR>3' > GiftableToken.bin && 
-        truncate -s "$((`stat -t -c "%s" GiftableToken.bin`-1))" GiftableToken.bin
-      # install test dependencies
-      - cd ../python 
-      - export PYTHONPATH=.
-      - pip install --extra-index-url https://pip.grassrootseconomics.net 
-        --extra-index-url https://gitlab.com/api/v4/projects/27624814/packages/pypi/simple 
-        -r requirements.txt -r test_requirements.txt 
-      # run tests
-      - bash run_tests.sh
-
-run-coverage:
-  stage: test
-  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest
-  script:
     - cd python 
-    - export PYTHONPATH=.
-    - pip install --extra-index-url https://pip.grassrootseconomics.net 
-        --extra-index-url https://gitlab.com/api/v4/projects/27624814/packages/pypi/simple 
-        -r requirements.txt -r test_requirements.txt 
-    -  pip install pytest pytest-cov
-    - coverage run -m pytest
-    - coverage html
-    - coverage report --fail-under=90
-    
-  coverage: '/^TOTAL.+?(\d+\%)$/'
-  artifacts:
-    reports:
-      cobertura: python/htmlcov/index.html
+    - pip install --extra-index-url https://pip.grassrootseconomics.net:8433 -r test_requirements.txt 
+    - pip install --extra-index-url https://pip.grassrootseconomics.net:8433 -r test_requirements.txt 
+    - bash run_tests.sh
 
-slither-analyzer:
-  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest
-  allow_failure: true
+
+slither-analize:
+  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-py-alpine:latest
   script: 
-    - cd solidity
-    - slither GiftableToken.sol
-    - slither GiftableToken.sol --print human-summary
-
+    - pip install slither-analyzer 
+    - slither solidity/
 

Dockerfile

@@ -0,0 +1,33 @@
+FROM ethereum/solc:0.6.12
+
+FROM python:3.8.6-alpine
+
+COPY --from=0 /usr/bin/solc /usr/bin/solc
+
+RUN apk update &&\
+	apk add gcc bash musl-dev libffi-dev openssl-dev autoconf automake build-base \
+  libtool pkgconfig python3-dev cargo
+
+WORKDIR /usr/src
+
+# Try to keep everything above here re-usable!
+
+COPY ./solidity/ /usr/src/giftable_erc20_token/solidity/
+COPY ./python/ /usr/src/giftable_erc20_token/python/
+
+RUN chmod +x ./python/run_tests.sh
+
+RUN cd giftable_erc20_token/solidity && \
+	solc GiftableToken.sol --abi | awk 'NR>3' > GiftableToken.abi.json
+
+RUN cd giftable_erc20_token/solidity && \
+	solc GiftableToken.sol --bin | awk 'NR>3' > GiftableToken.bin && \
+	truncate -s "$((`stat -t -c "%s" GiftableToken.bin`-1))" GiftableToken.bin
+
+RUN cd giftable_erc20_token/python && \
+	pip install --extra-index-url https://pip.grassrootseconomics.net:8433 .
+
+RUN pip install slither-analyzer
+
+# To deploy:
+# giftable-token-deploy --contracts-dir giftable_erc20_token/solidity/ <amount>

README.md

@@ -1,25 +0,0 @@
-# ETH-ERC20 Solidity Contract
-
-
-### solidity 
-
-To generate bytecode and tests install solc 8.x.x and run the solc bits below or execute the following: 
-
-```
-docker run -v `pwd`:/src registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest solc --evm-version=byzantium solidity/GiftableToken.sol --abi
-```
-
-```
-docker run -v `pwd`:/src registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest solc GiftableToken.sol --bin | awk 'NR>3' > GiftableToken.bin 
-```
-
-### python unit tests
-
-```
-pip install --extra-index-url https://gitlab.com/api/v4/projects/27624814/packages/pypi/simple \
---extra-index-url https://pip.grassrootseconomics.net \
--r requirements.txt -r test_requirements.txt
-
-bash python/run_tests.sh
-
-```

python/.coveragerc

@@ -1,7 +0,0 @@
-[run]
-branch = True
-[report]
-omit = .venv/*
-        **/runnable/*.py
-[html]
-

python/CHANGELOG

@@ -1,11 +1,9 @@
-* 0.1.10
-	- Apply transfer ownership protection in GiftableToken contract
-* 0.1.9
-	- Add statictoken contract
-* 0.0.10
+* 0.0.10-pending
 	- Upgrade chainlib dependency, providing customizable jsonrpc id
 	- Move to chainlib-eth
-* 0.0.7
+* 0.0.9-unreleased
+* 0.0.8-unreleased
+* 0.0.7-unreleased
 	- Implement keystore signing.
 	- Change makefile to compile contract for Byzantium.
 	- Change mint method name to mintTo

python/eth_erc20/runnable/approve.py

@@ -1,99 +0,0 @@
-#!python3
-
-"""Token transfer script
-
-.. moduleauthor:: Louis Holbrook <dev@holbrook.no>
-.. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746 
-
-"""
-
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# standard imports
-import os
-import io
-import json
-import argparse
-import logging
-
-# external imports
-from hexathon import (
-        add_0x,
-        strip_0x,
-        )
-from chainlib.eth.connection import EthHTTPConnection
-from chainlib.chain import ChainSpec
-from chainlib.eth.runnable.util import decode_for_puny_humans
-from chainlib.eth.address import to_checksum_address
-import chainlib.eth.cli
-
-# local imports
-from eth_erc20 import ERC20
-
-logging.basicConfig(level=logging.WARNING)
-logg = logging.getLogger()
-
-arg_flags = chainlib.eth.cli.argflag_std_write | chainlib.eth.cli.Flag.EXEC | chainlib.eth.cli.Flag.WALLET 
-argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
-argparser.add_positional('amount', type=int, help='Token amount to send')
-args = argparser.parse_args()
-extra_args = {
-    'amount': None,
-        }
-config = chainlib.eth.cli.Config.from_args(args, arg_flags, extra_args=extra_args, default_fee_limit=100000)
-
-block_all = args.ww
-block_last = args.w or block_all
-
-wallet = chainlib.eth.cli.Wallet()
-wallet.from_config(config)
-
-rpc = chainlib.eth.cli.Rpc(wallet=wallet)
-conn = rpc.connect_by_config(config)
-
-chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
-
-value = config.get('_AMOUNT')
-
-send = config.true('_RPC_SEND')
-
-def main():
-
-    signer = rpc.get_signer()
-    signer_address = rpc.get_sender_address()
-
-    gas_oracle = rpc.get_gas_oracle()
-    nonce_oracle = rpc.get_nonce_oracle()
-
-    g = ERC20(chain_spec, signer=signer, gas_oracle=gas_oracle, nonce_oracle=nonce_oracle)
-
-    recipient = to_checksum_address(config.get('_RECIPIENT'))
-    if not config.true('_UNSAFE') and recipient != add_0x(config.get('_RECIPIENT')):
-        raise ValueError('invalid checksum address for recipient')
-
-    token_address = to_checksum_address(config.get('_EXEC_ADDRESS'))
-    if not config.true('_UNSAFE') and token_address != add_0x(config.get('_EXEC_ADDRESS')):
-        raise ValueError('invalid checksum address for contract')
-
-    (tx_hash_hex, o) = g.approve(token_address, signer_address, recipient, value, id_generator=rpc.id_generator)
-
-    if send:
-        conn.do(o)
-        if block_last:
-            r = conn.wait(tx_hash_hex)
-            if logg.isEnabledFor(logging.DEBUG):
-                sender_balance = balance(g, token_address, signer_address, id_generator=rpc.id_generator)
-                recipient_balance = balance(g, token_address, recipient, id_generator=rpc.id_generator)
-                logg.debug('sender {} balance after: {}'.format(signer_address, sender_balance))
-                logg.debug('recipient {} balance after: {}'.format(recipient, recipient_balance))
-            if r['status'] == 0:
-                logg.critical('VM revert. Wish I could tell you more')
-                sys.exit(1)
-        print(tx_hash_hex)
-
-    else:
-        print(o['params'][0])
-
-
-if __name__ == '__main__':
-    main()

python/eth_erc20/runnable/info.py

@@ -42,7 +42,6 @@ logg = logging.getLogger()
 
 arg_flags = chainlib.eth.cli.argflag_std_read | chainlib.eth.cli.Flag.EXEC
 argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
-argparser.add_positional('item', required=False)
 args = argparser.parse_args()
 config = chainlib.eth.cli.Config.from_args(args, arg_flags)
 
@@ -57,53 +56,25 @@ token_address = config.get('_EXEC_ADDRESS')
 def main():
     g = ERC20(chain_spec=chain_spec, gas_oracle=rpc.get_gas_oracle())
 
-    if not args.item or args.item == 'name':
-        name_o = g.name(token_address)
-        r = conn.do(name_o)
-        token_name = g.parse_name(r)
-        s = ''
-        if not args.item or not args.raw:
-            s = 'Name: '
-        s += token_name
-        print(s)
-        if args.item == 'name':
-            sys.exit(0)
+    name_o = g.name(token_address)
+    r = conn.do(name_o)
+    token_name = g.parse_name(r)
+    print('Name: {}'.format(token_name))
 
-    if not args.item or args.item == 'symbol':
-        symbol_o = g.symbol(token_address)
-        r = conn.do(symbol_o)
-        token_symbol = g.parse_symbol(r)
-        s = ''
-        if not args.item or not args.raw:
-            s = 'Symbol: '
-        s += token_symbol
-        print(s)
-        if args.item == 'symbol':
-            sys.exit(0)
+    symbol_o = g.symbol(token_address)
+    r = conn.do(symbol_o)
+    token_symbol = g.parse_symbol(r)
+    print('Symbol: {}'.format(token_symbol))
 
-    if not args.item or args.item == 'decimals':
-        decimals_o = g.decimals(token_address)
-        r = conn.do(decimals_o)
-        decimals = int(strip_0x(r), 16)
-        s = ''
-        if not args.item or not args.raw:
-            s = 'Decimals: '
-        s += str(decimals)
-        print(s)
-        if args.item == 'decimals':
-            sys.exit(0)
+    decimals_o = g.decimals(token_address)
+    r = conn.do(decimals_o)
+    decimals = int(strip_0x(r), 16)
+    print('Decimals: {}'.format(decimals))
 
-    if not args.item or args.item == 'supply':
-        supply_o = g.total_supply(token_address)
-        r = conn.do(supply_o)
-        supply = int(strip_0x(r), 16)
-        s = ''
-        if not args.item or not args.raw:
-            s = 'Supply: '
-        s += str(supply)
-        print(s)
-        if args.item == 'supply':
-            sys.exit(0)
+    supply_o = g.total_supply(token_address)
+    r = conn.do(supply_o)
+    supply = int(strip_0x(r), 16)
+    print('Total supply: {}'.format(supply))
 
 
 if __name__ == '__main__':

python/eth_erc20/runnable/transfer.py

@@ -24,10 +24,7 @@ from hexathon import (
 from chainlib.eth.connection import EthHTTPConnection
 from chainlib.chain import ChainSpec
 from chainlib.eth.runnable.util import decode_for_puny_humans
-from chainlib.eth.address import (
-        to_checksum_address,
-        is_same_address,
-        )
+from chainlib.eth.address import to_checksum_address
 import chainlib.eth.cli
 
 # local imports
@@ -38,12 +35,10 @@ logg = logging.getLogger()
 
 arg_flags = chainlib.eth.cli.argflag_std_write | chainlib.eth.cli.Flag.EXEC | chainlib.eth.cli.Flag.WALLET 
 argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
-argparser.add_argument('--from', type=str, help='Address to send on behalf of') 
 argparser.add_positional('amount', type=int, help='Token amount to send')
 args = argparser.parse_args()
 extra_args = {
     'amount': None,
-    'from': None,
         }
 config = chainlib.eth.cli.Config.from_args(args, arg_flags, extra_args=extra_args, default_fee_limit=100000)
 
@@ -87,37 +82,22 @@ def main():
     if not config.true('_UNSAFE') and token_address != add_0x(config.get('_EXEC_ADDRESS')):
         raise ValueError('invalid checksum address for contract')
 
-    transfer_from_address = None
-    if config.get('_FROM'):
-        transfer_from_address = to_checksum_address(config.get('_FROM'))
-        if not config.true('_UNSAFE') and transfer_from_address != add_0x(config.get('_FROM')):
-            raise ValueError('invalid checksum address for "from" argument')
-
-    check_balance_address = None
-    
     if logg.isEnabledFor(logging.DEBUG):
-        if transfer_from_address:
-            check_balance_address = transfer_from_address
-        else:
-            check_balance_address = signer_address
-        sender_balance = balance(g, token_address, check_balance_address, id_generator=rpc.id_generator)
+        sender_balance = balance(g, token_address, signer_address, id_generator=rpc.id_generator)
         recipient_balance = balance(g, token_address, recipient, id_generator=rpc.id_generator)
-        logg.debug('sender {} balance before: {}'.format(check_balance_address, sender_balance))
+        logg.debug('sender {} balance before: {}'.format(signer_address, sender_balance))
         logg.debug('recipient {} balance before: {}'.format(recipient, recipient_balance))
 
-    if transfer_from_address and not is_same_address(transfer_from_address, signer_address):
-        (tx_hash_hex, o) = g.transfer_from(token_address, signer_address, transfer_from_address, recipient, value, id_generator=rpc.id_generator)
-    else:
-        (tx_hash_hex, o) = g.transfer(token_address, signer_address, recipient, value, id_generator=rpc.id_generator)
+    (tx_hash_hex, o) = g.transfer(token_address, signer_address, recipient, value, id_generator=rpc.id_generator)
 
     if send:
         conn.do(o)
         if block_last:
             r = conn.wait(tx_hash_hex)
             if logg.isEnabledFor(logging.DEBUG):
-                sender_balance = balance(g, token_address, check_balance_address, id_generator=rpc.id_generator)
+                sender_balance = balance(g, token_address, signer_address, id_generator=rpc.id_generator)
                 recipient_balance = balance(g, token_address, recipient, id_generator=rpc.id_generator)
-                logg.debug('sender {} balance after: {}'.format(check_balance_address, sender_balance))
+                logg.debug('sender {} balance after: {}'.format(signer_address, sender_balance))
                 logg.debug('recipient {} balance after: {}'.format(recipient, recipient_balance))
             if r['status'] == 0:
                 logg.critical('VM revert. Wish I could tell you more')

python/giftable_erc20_token/data/GiftableToken.json

@@ -1 +1 @@
-[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"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":"_minter","type":"address"},{"indexed":true,"internalType":"address","name":"_beneficiary","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Mint","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":"_minter","type":"address"}],"name":"addMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"addWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"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":[{"internalType":"address","name":"_minter","type":"address"}],"name":"deleteWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"mintTo","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"removeMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","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"}],"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":"_minter","type":"address"},{"indexed":true,"internalType":"address","name":"_beneficiary","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Mint","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":"_minter","type":"address"}],"name":"addMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"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":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"mintTo","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"removeMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

python/giftable_erc20_token/factory.py

@@ -94,4 +94,4 @@ class GiftableToken(TxFactory):
         tx = self.template(sender_address, contract_address, use_nonce=True)
         tx = self.set_code(tx, data)
         tx = self.finalize(tx, tx_format)
-        return tx
+        return tx

python/run_tests.sh

@@ -2,8 +2,6 @@
 
 set -e
 set -x
-default_pythonpath=$PYTHONPATH:.
-export PYTHONPATH=${default_pythonpath:-.}
 for f in `ls tests/*.py`; do
 	python $f
 	if [ $? -gt 0 ]; then

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = eth-erc20
-version = 0.1.11
+version = 0.1.5
 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
@@ -30,14 +30,11 @@ packages =
 	eth_erc20
 	eth_erc20.data
 	eth_erc20.runnable
-	static_token.data
 
 [options.package_data]
 * =
  	data/GiftableToken.json
  	data/GiftableToken.bin
- 	data/StaticToken.json
- 	data/StaticToken.bin
  	data/ERC20.json
 
 [options.entry_points]
@@ -47,4 +44,3 @@ console_scripts =
 	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/data/StaticToken.json

@@ -1 +0,0 @@
-[{"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"}]

python/tests/test_erc20_interface.py

@@ -12,7 +12,6 @@ from chainlib.eth.tx import (
         receipt,
         )
 from chainlib.eth.address import to_checksum_address
-from hexathon import strip_0x
 
 # local imports
 from giftable_erc20_token import GiftableToken
@@ -103,7 +102,7 @@ class TestToken(EthTesterCase):
         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[0], self.accounts[1])
         self.assertEqual(data[1], 1000)
 
 
@@ -125,7 +124,7 @@ class TestToken(EthTesterCase):
         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[0], self.accounts[1])
         self.assertEqual(data[1], 1000)
 
         nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
@@ -139,8 +138,8 @@ class TestToken(EthTesterCase):
         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[0], self.accounts[0])
+        self.assertEqual(data[1], 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)

solidity/GiftableToken.json

@@ -1 +1 @@
-[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"}],"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":"_minter","type":"address"},{"indexed":true,"internalType":"address","name":"_beneficiary","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Mint","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":"_minter","type":"address"}],"name":"addMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"addWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"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":[{"internalType":"address","name":"_minter","type":"address"}],"name":"deleteWriter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"mintTo","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"removeMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","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"}],"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":"_minter","type":"address"},{"indexed":true,"internalType":"address","name":"_beneficiary","type":"address"},{"indexed":false,"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Mint","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":"_minter","type":"address"}],"name":"addMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"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":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"mintTo","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"removeMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","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":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

solidity/GiftableToken.sol

@@ -1,4 +1,4 @@
-pragma solidity >=0.6.11;
+pragma solidity >0.6.11;
 
 // SPDX-License-Identifier: GPL-3.0-or-later
 // File-Version: 2
@@ -24,7 +24,7 @@ contract GiftableToken {
 	event Transfer(address indexed _from, address indexed _to, uint256 _value);
 	event TransferFrom(address indexed _from, address indexed _to, address indexed _spender, uint256 _value);
 	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
-	event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value); // Minter
+	event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value);
 
 	constructor(string memory _name, string memory _symbol, uint8 _decimals) public {
 		owner = msg.sender;
@@ -34,7 +34,6 @@ contract GiftableToken {
 		minters[msg.sender] = true;
 	}
 
-	// Implements Minter
 	function mintTo(address _to, uint256 _value) public returns (bool) {
 		require(minters[msg.sender]);
 
@@ -54,11 +53,6 @@ contract GiftableToken {
 		return true;
 	}
 
-	// Implements Writer
-	function addWriter(address _minter) public returns (bool) {
-		return addMinter(_minter);
-	}
-
 	function removeMinter(address _minter) public returns (bool) {
 		require(msg.sender == owner || msg.sender == _minter);
 
@@ -67,11 +61,6 @@ contract GiftableToken {
 		return true;
 	}
 
-	// Implements Writer
-	function deleteWriter(address _minter) public returns (bool) {
-		return removeMinter(_minter);
-	}
-
 	// Implements ERC20
 	function transfer(address _to, uint256 _value) public returns (bool) {
 		require(balanceOf[msg.sender] >= _value);
@@ -104,7 +93,6 @@ contract GiftableToken {
 
 	// Implements EIP173
 	function transferOwnership(address _newOwner) public returns (bool) {
-		require(msg.sender == owner);
 		owner = _newOwner;
 	}
 
@@ -119,9 +107,6 @@ contract GiftableToken {
 		if (_sum == 0x01ffc9a7) { // EIP165
 			return true;
 		}
-		if (_sum == 0x80c84bd6) { // Writer
-			return true;
-		}
 		if (_sum == 0x9493f8b2) { // EIP173
 			return true;
 		}

solidity/Makefile

@@ -4,11 +4,7 @@ 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) --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
 
 install: all
-	cp -v Giftable*{json,bin} ../python/giftable_erc20_token/data/
-	cp -v Static*{json,bin} ../python/static_token/data/
+	cp -v *{json,bin} ../python/giftable_erc20_token/data/
 

solidity/StaticToken.json

@@ -1 +0,0 @@
-[{"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"}]

solidity/StaticToken.sol

@@ -1,76 +0,0 @@
-pragma solidity >0.6.11;
-
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-contract StaticToken {
-
-	address owner;
-	mapping(address => bool) minters;
-
-	// Implements ERC20
-	string public name;
-	// Implements ERC20
-	string public symbol;
-	// 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;
-
-	event Transfer(address indexed _from, address indexed _to, uint256 _value);
-	event TransferFrom(address indexed _from, address indexed _to, address indexed _spender, uint256 _value);
-	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
-
-	constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _supply) public {
-		owner = msg.sender;
-		name = _name;
-		symbol = _symbol;
-		decimals = _decimals;
-		totalSupply = _supply;
-		balanceOf[owner] = _supply;
-	}
-
-	// Implements ERC20
-	function transfer(address _to, uint256 _value) public returns (bool) {
-		require(balanceOf[msg.sender] >= _value);
-		balanceOf[msg.sender] -= _value; 
-		balanceOf[_to] += _value;
-		emit Transfer(msg.sender, _to, _value);
-		return true;
-	}
-
-	// Implements ERC20
-	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
-		require(allowance[_from][msg.sender] >= _value);
-		require(balanceOf[_from] >= _value);
-		allowance[_from][msg.sender] = allowance[_from][msg.sender] - _value;
-		balanceOf[_from] -= _value; 
-		balanceOf[_to] += _value;
-		emit TransferFrom(_from, _to, msg.sender, _value);
-		return true;
-	}
-
-	// Implements ERC20
-	function approve(address _spender, uint256 _value) public returns (bool) {
-		if (_value > 0) {
-			require(allowance[msg.sender][_spender] == 0);
-		}
-		allowance[msg.sender][_spender] = _value;
-		emit Approval(msg.sender, _spender, _value);
-		return true;
-	}
-
-	// Implements EIP165
-	function supportsInterface(bytes4 _sum) public returns (bool) {
-		if (_sum == 0xc6bb4b70) { // ERC20
-			return true;
-		}
-		if (_sum == 0x01ffc9a7) { // EIP165
-			return true;
-		}
-		return false;
-	}
-}