Arachnid

contract UserTokenFactory {
  mapping(address=>UserToken) public userTokens;
  
  function getUserToken(address owner) returns(UserToken) {
    if(userTokens[owner] == 0) {
      UserToken token = new UserToken(owner);
      userTokens[owner] = token;
    }
    return userTokens[owner];
}

Arachnid

object "Create2Proxy" {
    code {
        let size := datasize("runtime")
        datacopy(0, dataoffset("runtime"), size)
        return(0, size)
    }
    object "runtime" {
        code {
            let salt := calldataload(0)
            let size := sub(calldatasize(), 32)

Arachnid

// WHATEVER YOU DO, DON'T USE THIS.
// This is a bit of demo code posted to illustrate a principle. It is unaudited,
// probably full of bugs, and definintely not production ready.
// https://twitter.com/nicksdjohnson/status/1041642345467404291

import "./DumbWallet.sol";

contract WalletDelegator {
    mapping(address=>uint) public nonces;

Arachnid

/**
 * @dev OpcodeChecker processes contract code to generate a bitmap of used opcodes.
 *
 * DO NOT USE: See the vulnerability identified by Recmo below. A patch will be provided soon.
 *
 * The generated bitmap can be used to enforce whitelisting and blacklisting on contract code.
 * Bit n of the bitmap is set iff opcode n is used. For instance, the presence of the STOP opcode
 * will result in bit 0 of the bitmap being set.
 *
 * A best-effort attempt is made to skip over unreachable data, but there may be false positives.

Arachnid

type Address {
  address: String
}

type Node {
  name: String
  nameHash: String
  label: String
  node: String
  subNodes: [Node]

Arachnid

// WHATEVER YOU DO, DON'T USE THIS.
// This is a bit of demo code posted to illustrate a principle. It is unaudited,
// probably full of bugs, and definintely not production ready.
// https://twitter.com/nicksdjohnson/status/1041642345467404291

contract DumbWallet {
    mapping(address=>bool) public authorised;
    
    event Authorised(address indexed target, bool value);
    event Call(address indexed target, uint value);

Arachnid

// WHATEVER YOU DO, DON'T USE THIS.
// This is a bit of demo code posted to illustrate a principle. It is unaudited,
// probably full of bugs, and definintely not production ready.
// https://twitter.com/nicksdjohnson/status/1041642345467404291

import "./DumbWallet.sol";

contract DumbMultisig {
    struct MultisigConfig {
        mapping(address=>bool) signatories;

Arachnid

import logging
import json
import sys

import mapreduce


def mapper(key, value):
    if value['event'] == 'AuctionStarted':
        yield (value['args']['hash'], {'registered': value['args']['registrationDate']})

Arachnid

import argparse
import requests
import xml.etree.ElementTree as ET

from cStringIO import StringIO
from PyPDF2 import PdfFileReader, PdfFileWriter


parser = argparse.ArgumentParser(description='Build a PDF from a set of matching RFCs')
parser.add_argument('rfc', metavar='RFC', nargs='*')

Arachnid

// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of