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testnet=1

[main]

[test]
server=1
rpcpassword=bitcoin
rpcuser=bitcoin

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footer: 2018-03-24 - Code Block London - [email protected] - @provoost on Twitter slidenumbers: true autoscale: false

Bitcoin's Moving Parts

• Coins
• Digital signatures

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#!/bin/sh
SIGNED_BINARIES=0

while getopts ":n:v:s" opt; do
  case $opt in
    n)
      NAME=$OPTARG
      ;;
    v)
      VERSION=$OPTARG

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Create payment request using their demo site. Obtain URL from QR code, e.g. on OSX using QR Journal.

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EC2 settings

• Instance type: t2.xlarge
• vCPUs: 4
• Memory (GiB): 16
• General Purpose SSD (GP2): 200 GB
• Ubuntu
• Running in eu-central-1b (Frankfurt)

Hint: to make your life easier and allow login with a simple ssh btc-0.14, edit ~/.ssh/config:

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node_modules
*.pdf

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resolutions := 58 76 80 120 152

all_FILES := $(foreach resolution, $(resolutions), icon-$(resolution).png)

all: $(all_FILES)
	
icon-%.png: icon-itunes-connect-1024.png
	convert $< -resize $*x$* $@
		
icon-itunes-connect-1024.png:  icon.svg

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#!/usr/bin/env ruby
require 'open-uri'
require 'JSON'
require 'digest/sha2'
require 'pry'
require 'bigdecimal'
require 'bitcoin' # Because I need to cheat every now and then

# Usage:
# gem install pry json ffi ruby-bitcoin

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// Observe and notify user if app has moved:
[[NSNotificationCenter defaultCenter] addObserverForName:@"AppHasMoved" 
  object:nil 
  queue:NSOperationQueuePriorityNormal 
  usingBlock:^(NSNotification *note) {
    // Check if we've already told the user recently
    NSDate *appHasMoved = [[NSUserDefaults standardUserDefaults] valueForKey:@"AlertAppHasMoved"];
    int interval = 7*24*60*60;
    if (appHasMoved == nil || 
    [appHasMoved compare:[[NSDate date] dateByAddingTimeInterval:-interval]] == NSOrderedAscending) {

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NSNumber* appHasMoved = [JSON objectForKey:@"app_has_moved"];
if(appHasMoved != nil && [appHasMoved boolValue]) {        
  // Notify the user that the app has moved.
  [[NSNotificationCenter defaultCenter] postNotificationName:@"AppHasMoved"
    object:self 
    userInfo:@{
      @"new_app_location" : [JSON objectForKey:@"new_app_location"], 
      @"app_has_moved_message" : [JSON objectForKey:@"app_has_moved_message"], 
      @"app_has_moved_title" : [JSON objectForKey:@"app_has_moved_title"]
    }