commit f2d35bf3fdb720fab8e2e83d32707465004aacb1
Author: nolash <dev@holbrook.no>
Date: Tue, 17 Nov 2020 19:23:57 +0100
Initial commit
Diffstat:
7 files changed, 285 insertions(+), 0 deletions(-)
diff --git a/CHANGELOG b/CHANGELOG
@@ -0,0 +1,3 @@
+* 0.0.1
+ - Adapt Bancor ERC20 token contract
+ - Add deploy-and-gift script
diff --git a/GiftableToken.abi.json b/GiftableToken.abi.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":"_initialSupply","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":false,"internalType":"uint256","name":"_oldTotal","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_newTotal","type":"uint256"}],"name":"ChangedSupply","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"},{"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":"gift","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":"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"}]
diff --git a/GiftableToken.bin b/GiftableToken.bin
@@ -0,0 +1 @@
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+\ No newline at end of file
diff --git a/GiftableToken.sol b/GiftableToken.sol
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: SEE LICENSE IN LICENSE
+pragma solidity ^0.7.4;
+
+/*
+ * This is a MOCK token used for DEVELOPMENT PURPOSES ONLY.
+ * It allows anyone to freely mint tokens with themselves as beneficiaries
+ * Code is based on the ERC20Token contract from Bancor's contracts-solidity repository
+ *
+ * @dev ERC20 Standard Token implementation
+*/
+
+contract GiftableToken { //is IERC20Token, Utils {
+ //using SafeMath for uint256;
+
+ string public name;
+ string public symbol;
+ uint8 public decimals;
+ uint256 public totalSupply;
+ mapping (address => uint256) public balanceOf;
+ mapping (address => mapping (address => uint256)) public allowance;
+
+ /**
+ * @dev triggered when tokens are transferred between wallets
+ *
+ * @param _from source address
+ * @param _to target address
+ * @param _value transfer amount
+ */
+ event Transfer(address indexed _from, address indexed _to, uint256 _value);
+
+ /**
+ * @dev triggered when a wallet allows another wallet to transfer tokens from on its behalf
+ *
+ * @param _owner wallet that approves the allowance
+ * @param _spender wallet that receives the allowance
+ * @param _value allowance amount
+ */
+ event Approval(address indexed _owner, address indexed _spender, uint256 _value);
+
+ event ChangedSupply(uint256 _oldTotal, uint256 _newTotal);
+
+ /**
+ * @dev initializes a new ERC20Token instance
+ *
+ * @param _name token name
+ * @param _symbol token symbol
+ * @param _decimals decimal points, for display purposes
+ * @param _initialSupply total supply of token units
+ */
+ constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _initialSupply) {
+ // validate input
+ require(bytes(_name).length > 0, "ERR_INVALID_NAME");
+ require(bytes(_symbol).length > 0, "ERR_INVALID_SYMBOL");
+
+ name = _name;
+ symbol = _symbol;
+ decimals = _decimals;
+ totalSupply = _initialSupply;
+ balanceOf[msg.sender] = _initialSupply;
+ }
+
+ // validates an address - currently only checks that it isn't null
+ modifier validAddress(address _address) {
+ _validAddress(_address);
+ _;
+ }
+
+ // error message binary size optimization
+ function _validAddress(address _address) internal pure {
+ require(_address != address(0), "ERR_INVALID_ADDRESS");
+ }
+
+
+ function gift(address _to, uint256 _value)
+ public
+ virtual
+ validAddress(_to)
+ returns (bool)
+ {
+ totalSupply = totalSupply + _value;
+ uint256 oldSupply = balanceOf[_to];
+ balanceOf[_to] = balanceOf[_to] + _value;
+ emit ChangedSupply(oldSupply, balanceOf[_to]);
+ emit Transfer(address(0x00), _to, _value);
+ return true;
+ }
+
+ /**
+ * @dev transfers tokens to a given address
+ * throws on any error rather then return a false flag to minimize user errors
+ *
+ * @param _to target address
+ * @param _value transfer amount
+ *
+ * @return true if the transfer was successful, false if it wasn't
+ */
+ function transfer(address _to, uint256 _value)
+ public
+ virtual
+ validAddress(_to)
+ returns (bool)
+ {
+ balanceOf[msg.sender] = balanceOf[msg.sender] - _value;
+ balanceOf[_to] = balanceOf[_to] + _value;
+ emit Transfer(msg.sender, _to, _value);
+ return true;
+ }
+
+ /**
+ * @dev transfers tokens to a given address on behalf of another address
+ * throws on any error rather then return a false flag to minimize user errors
+ *
+ * @param _from source address
+ * @param _to target address
+ * @param _value transfer amount
+ *
+ * @return true if the transfer was successful, false if it wasn't
+ */
+ function transferFrom(address _from, address _to, uint256 _value)
+ public
+ virtual
+ validAddress(_from)
+ validAddress(_to)
+ returns (bool)
+ {
+ allowance[_from][msg.sender] = allowance[_from][msg.sender] - _value;
+ balanceOf[_from] = balanceOf[_from] - _value;
+ balanceOf[_to] = balanceOf[_to] + _value;
+ emit Transfer(_from, _to, _value);
+ return true;
+ }
+
+ /**
+ * @dev allows another account/contract to transfers tokens on behalf of the caller
+ * throws on any error rather then return a false flag to minimize user errors
+ *
+ * also, to minimize the risk of the approve/transferFrom attack vector
+ * (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice
+ * in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value
+ *
+ * @param _spender approved address
+ * @param _value allowance amount
+ *
+ * @return true if the approval was successful, false if it wasn't
+ */
+ function approve(address _spender, uint256 _value)
+ public
+ virtual
+ validAddress(_spender)
+ returns (bool)
+ {
+ // if the allowance isn't 0, it can only be updated to 0 to prevent an allowance change immediately after withdrawal
+ require(_value == 0 || allowance[msg.sender][_spender] == 0, "ERR_INVALID_AMOUNT");
+
+ allowance[msg.sender][_spender] = _value;
+ emit Approval(msg.sender, _spender, _value);
+ return true;
+ }
+}
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,45 @@
+ Bprotocol Foundation (Bancor) LICENSE
+
+1. SUBJECT TO THE PROVISIONS SET FORTH HEREIN, INCLUDING “EFFECTIVE DATE”, YOU CAN
+ USE THIS CODE, FILE AND/OR SOFTWARE (“SOFTWARE”) ONLY IN CONNECTION WITH THE
+ BANCOR LIQUIDITY NETWORK AND/OR THE USE OF BNT ("PERMITTED USE"). ANY OTHER USE IS
+ PROHIBITED UNLESS THE USER SHALL RECEIVE AN EXPLICIT PRIOR WRITTEN APPROVAL FROM
+ BPROTOCOL FOUNDATION (BANCOR) TO DO SO (PLEASE CONTACT license@bancor.network IN
+ THIS REGARD), WHICH APPROVAL, IF GIVEN, MAY REQUIRE THE OBTAINMENT OF SEPARATE
+ LICENSE UNDER A DIFFERENT LICENSING MODEL. USING THIS SOFTWARE NOT IN THE FRAME OF
+ SUCH PERMITTED USE MAY, AMONG OTHERS, ALSO BREACH PATENT RIGHTS CONCERNING PATENTS
+ WHICH ARE EMBODIED/INCORPORATED/USED IN THIS SOFTWARE.
+
+2. ANY SUCH PERMITTED USE SHOULD ALSO COMPLY WITH THE TERMS BELOW.
+
+3. Redistribution and use in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+A. Redistributions of source code must retain the above copyright notice, this list
+ of conditions and the following disclaimer.
+B. Redistributions in binary form must reproduce the above copyright notice, this
+ list of conditions and the following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+C. Neither the name of the copyright holder nor the names of its contributors may be
+ used to endorse or promote products derived from this software without specific prior
+ written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+EFFECTIVE DATE: THIS LICENSE SHALL APPLY ONLY TO SOFTWARE (OR ANY VERSION THEREOF),
+THAT HAS BEEN PUBLISHED AFTER THE DATE AND TIME THIS LICENSE HAS BEEN FIRST PUBLISHED
+(“EFFECTIVE DATE”); Any previous versions published prior to the effective date (“Older Versions”)
+shall remain licensed under the Apache License, Version 2.0 (the "Older Versions License");
+You may obtain a copy of the Older Version License at http://www.apache.org/licenses/LICENSE-2.0
+you may not use this file except in compliance with the Older Version License. Unless
+required by applicable law or agreed to in writing, Older Versions distributed under the
+Older Version License are distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
+OF ANY KIND, either express or implied. See the Older Version License for the specific
+language governing permissions and limitations under the Older Version License.
diff --git a/VERSION b/VERSION
@@ -0,0 +1 @@
+0.0.1
diff --git a/deploy.py b/deploy.py
@@ -0,0 +1,74 @@
+"""Deploys giftable token, and optionally gifts a set amount to all accounts in wallet
+
+.. moduleauthor:: Louis Holbrook <dev@holbrook.no>
+.. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+
+"""
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# standard imports
+import json
+import argparse
+import logging
+
+# third-party imports
+import web3
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+logging.getLogger('web3').setLevel(logging.WARNING)
+logging.getLogger('urllib3').setLevel(logging.WARNING)
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument('-p', '--provider', dest='p', default='http://localhost:8545', type=str, help='Web3 provider url (http only)')
+argparser.add_argument('-g', '--gift', dest='g', action='store_true', help='If set, tokens will be gifted to all accounts in provider wallet')
+argparser.add_argument('-n', '--name', dest='n', default='Giftable Token', type=str, help='Token name')
+argparser.add_argument('-s', '--symbol', dest='s', default='GFT', type=str, help='Token symbol')
+argparser.add_argument('-d', '--decimals', dest='d', default=18, type=int, help='Token decimals')
+argparser.add_argument('-a', '--account', dest='a', type=str, help='Owner account. If not specified, first account in wallet will be used')
+argparser.add_argument('-v', action='store_true', help='Be verbose')
+argparser.add_argument('amount', type=int, help='Initial token supply (will be owned by contract creator)')
+args = argparser.parse_args()
+
+if args.v:
+ logg.setLevel(logging.DEBUG)
+
+if __name__ == '__main__':
+ w3 = web3.Web3(web3.Web3.HTTPProvider(args.p))
+
+ f = open('./GiftableToken.abi.json', 'r')
+ abi = json.load(f)
+ f.close()
+
+ f = open('./GiftableToken.bin', 'r')
+ bytecode = f.read()
+ f.close()
+
+ if args.a != None:
+ a = web3.Web3.toChecksumAddress(args.a)
+ w3.eth.defaultAccount = a
+ else:
+ w3.eth.defaultAccount = w3.eth.accounts[0]
+
+ c = w3.eth.contract(abi=abi, bytecode=bytecode)
+ tx_hash = c.constructor(args.n, args.s, args.d, args.amount).transact()
+ rcpt = w3.eth.getTransactionReceipt(tx_hash)
+ address = rcpt.contractAddress
+ c = w3.eth.contract(abi=abi, address=address)
+
+ logg.debug('construct tx {} address {}'.format(tx_hash.hex(), address))
+ balance = c.functions.balanceOf(w3.eth.defaultAccount).call()
+ logg.info('balance {}: {}'.format(w3.eth.defaultAccount, balance))
+
+ if args.g:
+ for a in w3.eth.accounts:
+ if a == w3.eth.defaultAccount:
+ continue
+ tx_hash = c.functions.gift(a, args.amount).transact()
+ rcpt = w3.eth.getTransactionReceipt(tx_hash)
+ balance = c.functions.balanceOf(a).call()
+ logg.info('balance {}: {}'.format(a, balance))
+
+ print(address)
