Mirza Pasic mirzap

Advisory: secret size attack on cross-chain hash lock smart contracts

Dr. Mark B Lundeberg, 2018 Feb 15 bitcoincash:qqy9myvyt7qffgye5a2mn2vn8ry95qm6asy40ptgx2

This security advisory notes a vulnerability in the common construction of cross-chain smart contracts (contracts between distinct cryptocurrencies) through hash locking. I focus on the primary use case in [atomic

Intro

the following guide is an updated install process based on the following, which needs some improvement still

https://github.com/lightningnetwork/lnd/blob/master/docs/INSTALL.md

This guide here is specific to getting lnd and bitcoind running on ubuntu 16.04 LTS for testnet.

It does not address mainnet, or using btcd, or neutrino.

btcd guide here

Calculate Difference

if (! function_exists('calculatePercentage')) {
    /**
     * Calculates the percentage between the given values.
     *
     * @param int|string $previous
     * @param int|string $current
     *

Half-baked thoughts exploring a different way of implementing a fully-validating BCH node.

The idea is to shift the storage of full transaction data to wallets, and explore how little data a fully validating node could store. This isn't a problem today (the UTXO set easily fits in the RAM of an inexpensive server-class machine), but might eventually be at very large transaction volumes.

Initial block download is a problem today (it is annoying to have to wait several hours or days to sync up a new node), and this scheme could make it orders of magnitude faster by shifting the time when full transaction data is broadcast from initial block download to new transaction announcement.

Important! This guide is out of date (circa 2017) and should no longer be used. For the latest advice, please refer to the BootstrapVue docs and their Nuxt.js module. https://bootstrap-vue.org/docs#nuxt-js

General setup:

Install bootstrap as a dev dependency, and its dependencies (node-sass and sass-loader) npm install --save-dev [email protected] node-sass sass-loader

What?

If a nested array is passed into a Laravel Collection, by default these will be threaded as normal arrays.

However, that's not always the ideal case and it would be nice if we could have nested collections in a cleaner way.

This is where this macro comes in handy.

	version: '3.1'
	services:
	reverse-proxy:
	image: traefik # The official Traefik docker image
	command: --api --docker # Enables the web UI and tells Traefik to listen to docker
	ports:
	- "80:80" # The HTTP port
	- "8080:8080" # The Web UI (enabled by --api)
	volumes:
	- /var/run/docker.sock:/var/run/docker.sock # So that Traefik can listen to the Docker events

	import React from 'react'
	import Link from 'next/link'
	import Button from '@material-ui/core/Button'

	const ButtonLink = ({ className, href, hrefAs, children, prefetch }) => (
	<Link href={href} as={hrefAs} prefetch>
	<a className={className}>
	{children}
	</a>
	</Link>

	# This is a sample build configuration for PHP.
	# Check our guides at https://confluence.atlassian.com/x/e8YWN for more examples.
	# Only use spaces to indent your .yml configuration.
	# You can specify a custom docker image from Docker Hub as your build environment.
	# run composer check-platform-reqs for a list of required extensions.
	image: php:7.2-fpm
	pipelines:
	default:
	# Not needed unless you're doing feature tests.
	# - step:


	#user nobody;
	worker_processes 4;

	#error_log logs/error.log;
	#error_log logs/error.log notice;
	#error_log logs/error.log info;

	#pid logs/nginx.pid;