#!/bin/bash

# Author: http://www.reddit.com/user/Renben9/

# For this to work you'll need the packages
#   * qrencode (to generate the QR-codes)
#   * texlive-fonts-extra (for the dejavu-fonts)
#   * kome script for latex
#   * basic latex packages

# Keys are generated by appending a counter from 1 to n to this seed
# Paste something high entrpy here
# I wouldn't use any spaces or special symbols
seed='correct-horse-battery-staple'

startNr=1
endNr=10

declare -a addressArray
declare -a keyArray

# Generates Address/Key-Pairs and the QR-Codes
function genKey() {

   curInput=${1}-${2}

   curAddress=`${HOME}/bin/brainwallet.py ${curInput} | cut -d\' -f2`
   curKey=`${HOME}/bin/brainwallet.py $curInput | cut -d\' -f4`

   echo -n "$curAddress" | qrencode -s 10 -l M -o address-${2}.png
   echo -n "$curKey" | qrencode -s 10 -l M -o key-${2}.png

   addressArray[$2]=$curAddress
   keyArray[$2]=$curKey
}


# General Part
echo '\documentclass[a4paper,12pt,landscape,DIV59]{scrartcl}' > dok.tex
echo '\usepackage[utf8]{inputenc}' >> dok.tex
echo '\usepackage[english]{babel}' >> dok.tex
echo '\usepackage{graphicx}' >> dok.tex
echo '\usepackage{dejavu}' >> dok.tex
echo '' >> dok.tex
echo '\renewcommand\familydefault{\sfdefault}' >> dok.tex
echo '' >> dok.tex
echo '\usepackage[T1]{fontenc}' >> dok.tex
echo '' >> dok.tex
echo '\setlength{\columnseprule}{0.4pt}' >> dok.tex
echo '' >> dok.tex

echo '\begin{document}' >> dok.tex
echo '' >> dok.tex



# This For-Loop generates the LaTeX-Code for the paper wallets

for i in `seq $startNr $endNr`; do

   genKey $seed ${i}

echo '\begin{tabular}[ht]{ p{0.32\textwidth}   p{0.32\textwidth}  p{0.32\textwidth} }' >> dok.tex
echo '' >> dok.tex
echo '  % TOP LEFT' >> dok.tex
echo '' >> dok.tex
echo '  \begin{center}' >> dok.tex
echo '      \begin{large}' >> dok.tex
echo '          What is a bitcoin address and a private key?' >> dok.tex
echo '      \end{large}' >> dok.tex
echo '  \end{center}' >> dok.tex
echo '  &' >> dok.tex
echo '' >> dok.tex
echo '  % TOP CENTER' >> dok.tex
echo '  \begin{center}' >> dok.tex
echo '    ' >> dok.tex
echo '  \end{center}' >> dok.tex
echo '  &' >> dok.tex
echo '' >> dok.tex
echo '' >> dok.tex
echo '  % TOP RIGHT' >> dok.tex
echo '  \begin{center}' >> dok.tex
echo '    \includegraphics[width=0.25\textwidth]{./bitcoinlogo.png}' >> dok.tex
echo '  \end{center}' >> dok.tex
echo '  \\' >> dok.tex
echo '' >> dok.tex
echo '' >> dok.tex
echo '  % BOTTOM LEFT' >> dok.tex
echo '  \vspace*{5mm}' >> dok.tex
echo '' >> dok.tex
echo '  Your bitcoin balance is the sum total of the amounts trasferred to your address minus the amounts transferred away from that address.' >> dok.tex
echo '  ' >> dok.tex
echo '  A decentralized peer-to-peer network secures those transactions. The computers securing the network are called miners, they get the fees collected from the transactions.' >> dok.tex
echo '  ' >> dok.tex
echo '  To send bitcoins, your wallet software digitally signs the transactions you create with the private key. \textbf{Who ever has the private key has control over your bitcoins. This is why it is important to secure them properly against malware, thiefs and hackers.}' >> dok.tex
echo '' >> dok.tex
echo '  \vspace*{2mm}' >> dok.tex
echo '  ' >> dok.tex
echo '  How to sweep your money to your own wallet ' >> dok.tex
echo '' >> dok.tex
echo '  \includegraphics[width=0.25\textwidth]{./greenarrow.png}' >> dok.tex
echo '  ' >> dok.tex
echo '  \begin{huge}' >> dok.tex
echo '      Android, iOS, PC \& Mac ' >> dok.tex
echo '  \end{huge} ' >> dok.tex
echo '  &' >> dok.tex
echo '' >> dok.tex
echo '  % BOTTOM CENTER' >> dok.tex
echo '  \begin{center}' >> dok.tex
echo '      \begin{huge}' >> dok.tex
echo '         Private Key' >> dok.tex
echo '      \end{huge}' >> dok.tex
echo ''

######### key ##########
# include key-png
echo -n '\includegraphics[width=0.25\textwidth]{./' >> dok.tex
echo -n "key-${i}.png" >> dok.tex
echo '}' >> dok.tex

# include key text
echo ''
echo '\begin{large}' >> dok.tex
echo "    ${keyArray[$i]:0:17}" >> dok.tex
echo '' >> dok.tex
echo "    ${keyArray[$i]:17:17}" >> dok.tex
echo '' >> dok.tex
echo "    ${keyArray[$i]:34:100}" >> dok.tex
echo '\end{large}' >> dok.tex
########################

echo '' >> dok.tex
echo '' >> dok.tex
echo '      \vspace*{20mm}' >> dok.tex
echo '' >> dok.tex
echo '      Keep this key save until you sweeped into your own wallet!' >> dok.tex
echo '' >> dok.tex
echo '  \end{center}' >> dok.tex
echo '  &' >> dok.tex
echo '' >> dok.tex
echo '  % BOTTOM RIGHT' >> dok.tex
echo '  \begin{center}' >> dok.tex
echo '      \begin{huge}' >> dok.tex
echo '          Address' >> dok.tex
echo '      \end{huge}' >> dok.tex
echo '' >> dok.tex

######### address #########
# include address-png
echo -n '        \includegraphics[width=0.25\textwidth]{./' >> dok.tex
echo -n "address-${i}.png" >> dok.tex
echo '}' >> dok.tex
echo '' >> dok.tex

# include address text
echo '\begin{large}' >> dok.tex
echo "${addressArray[$i]:0:15}" >> dok.tex
echo " " >> dok.tex
echo "${addressArray[$i]:15:15}" >> dok.tex
echo " " >> dok.tex
echo "${addressArray[$i]:30:15}" >> dok.tex
echo " " >> dok.tex
echo '\end{large}' >> dok.tex
###########################


echo '      \vspace*{15mm}' >> dok.tex
echo '      Amount in Bitcoin:' >> dok.tex
echo '' >> dok.tex
echo '      \vspace*{10mm}' >> dok.tex
echo '' >> dok.tex
echo '      Amount in Euros:' >> dok.tex
echo '' >> dok.tex
echo '  \end{center}' >> dok.tex
echo '  \\' >> dok.tex
echo '\end{tabular}' >> dok.tex
#echo '\pagebreak' >> dok.tex
done

echo '\end{document}' >> dok.tex