Evan Alter hadees

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.

This lets you set the preload headers for your assets, so that the browser can start fetching them before it begins parsing HTML.

	#! /usr/bin/env ruby

	# NOTE: Requires Ruby 2.1 or greater.

	# This script can be used to parse and dump the information from
	# the 'html/contact_info.htm' file in a Facebook user data ZIP download.
	#
	# It prints all cell phone call + SMS message + MMS records, plus a summary of each.
	#
	# It also dumps all of the records into CSV files inside a 'CSV' folder, that is created

	##
	# An RSpec matcher for checking Rails validation errors on an object.
	#
	# Usage:
	# # Expect exactly three validation errors:
	# # - field1 must not be empty
	# # - field1 must be a number
	# # - field2 must be greater than zero
	# expect(x).to have_validation_errors
	# .related_to(:field1)

	require 'openssl'

	def encrypt_string(str)
	cipher_salt1 = 'some-random-salt-'
	cipher_salt2 = 'another-random-salt-'
	cipher = OpenSSL::Cipher.new('AES-128-ECB').encrypt
	cipher.key = OpenSSL::PKCS5.pbkdf2_hmac_sha1(cipher_salt1, cipher_salt2, 20_000, cipher.key_len)
	encrypted = cipher.update(str) + cipher.final
	encrypted.unpack('H*')[0].upcase
	end

	After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
	The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

	Database files have to be updated before starting the server, here are the steps that had to be followed:

	# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
	brew unlink postgresql
	brew install [email protected]
	brew unlink [email protected]
	brew link postgresql

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>Label</key>
	<string>net.duplicati.server</string>
	<key>ProgramArguments</key>
	<array>
	<string>/Applications/Duplicati.app/Contents/MacOS/duplicati-server</string>
	<string>--webservice-port=8200</string>

	# load into test setup after `require 'capybara/rails'`

	# some sources for below flags and profile settings
	# https://stackoverflow.com/questions/43143014/chrome-is-being-controlled-by-automated-test-software/43145088
	# https://sqa.stackexchange.com/questions/26051/chrome-driver-2-28-chrome-is-being-controlled-by-automated-test-software-notif
	# http://stackoverflow.com/questions/12211781/how-to-maximize-window-in-chrome-using-webdriver-python
	# update sources for new Options object
	# https://github.com/SeleniumHQ/selenium/wiki/Ruby-Bindings
	# https://github.com/teamcapybara/capybara/blob/master/lib/capybara/selenium/driver.rb
	begin

	// Fix for validations on simple form

	// Need to import bootstrap functions and mixins if you want to dynamically set colors
	// Otherwise replace theme-color... with hex color
	@import 'bootstrap/functions';
	@import 'bootstrap/variables';
	@import 'bootstrap/mixins';

	.has-invalid {
	.invalid-feedback {

	function getWeather(zip, additionalText) {
	var response = UrlFetchApp.fetch("http://api.poncho.is/weather/forecast/"+zip)
	, obj = JSON.parse(response.getContentText())
	;

	return [ [obj.data.body+additionalText, obj.data.media] ]
	}

	/*
	* Retrieves the URL to the active spreadsheet