aknirmal90

################################################################################
1. Find number of addresses sending funds to an address
################################################################################

SELECT 
    COUNT(DISTINCT ARRAY_TO_STRING(inputs.addresses, '')) AS addresses
,   MIN(block_timestamp) as start_date
FROM `bigquery-public-data.crypto_bitcoin.transactions` AS txns
    ,   UNNEST(txns.outputs) AS outputs
    ,   UNNEST(txns.inputs) AS inputs

caffeinum

const bitcoin = require('bitcoinjs-lib') // version @3.3.2, ver4 won't work
const request = require('request-promise-native')
const net = process.env.NETWORK === 'testnet'
  ? bitcoin.networks.testnet
  : bitcoin.networks.bitcoin

const API = net === bitcoin.networks.testnet
  ? `https://test-insight.swap.online/insight-api`
  : `https://insight.bitpay.com/api`

bretton

Intro

This guide is specific to getting LND 0.5-beta and Bitcoind running on Ubuntu 16.04 LTS for mainnet. It is aging rapidly and includes steps not necessary on newer versions of LND. As of April 2021 it is very out of date for bitcoind. As of December 2021 it is outdated for LND too.

Original installation guide:

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

This guide is broken into the following sections:

• Install bitcoind and set to start automatically
• Install development tools and dependancies

mkozjak

Install Golang 1.9:

wget https://storage.googleapis.com/golang/go1.9.linux-armv6l.tar.gz
sudo tar -C /usr/local -xzf go1.9.linux-armv6l.tar.gz
export PATH=$PATH:/usr/local/go/bin # put into ~/.profile

If already installed old golang with apt-get:

Necklaces

GNU/Linux UFW VPN kill switch tutorial

This is a quick guide for setting up a kill switch using UFW (Uncomplicated FireWall). It is assumed you are using OpenVPN and optionally Network-Manager with network-manager-openvpn.

1. (Optional) IP Addresses

Before we can start we're going to need the IP address (or the IP addresses) of your VPN so that we can whitelist those later on, write them down. They are obviously going to be different for every VPN and VPNs with multiple servers, so I'll leave this up to you.

2. Install UFW

On some systems UFW is installed and enabled by default (Ubuntu, for example). Installation procedure is going to be different for every distribution of GNU/Linux, but it's usually something like

harding

A description of known problems in Satoshi Nakamoto's paper, "Bitcoin: A Peer-to-Peer Electronic Cash System", as well as notes on terminology changes and how Bitcoin's implementation differs from that described in the paper.

Abstract

The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power.

atx

#! /bin/bash

# This script builds a Gentoo image for the Allwinner H3
# Based on http://linux-sunxi.org/H3_Manual_build_howto
# Tested on Orange Pi PC

set -e

function green {
	echo -e '\033[0;32m'$@'\033[0m'

david415

#
# rules.before
#
# Rules that should be run before the ufw command line added rules. Custom
# rules should be added to one of these chains:
#   ufw-before-input
#   ufw-before-output
#   ufw-before-forward
#