Convenient script to run Electrum on Tails

start_electrum.sh

#!/bin/bash
set -o errexit
#set -o xtrace
#
# start_electrum.sh
#
# This script launches Electrum Bitcoin Wallet on Tails OS.
# Ledger Nano S hardware wallet is supported.
#
# Tails 3.9 (2018-09-04), https://tails.boum.org
# Electrum 3.2.3 (2018-09-03), https://electrum.org
# Ledger Nano S Firmware 1.4.2 (2018-04-17), https://www.ledger.fr, https://www.ledger.com, https://www.ledgerwallet.com
#
# IMPORTANT NOTES about files location:
# 1) both files Electrum-x.y.z.tar.gz and Electrum-x.y.z.tar.gz.asc are downloaded
# to the ELECTRUM_DOWNLOAD_PATH='/home/amnesia/Persistent/Tor Browser/' folder;
# 2) add_udev_rules.sh file is dowloaded to the '/home/amnesia/Persistent/' folder,
# see: https://support.ledgerwallet.com/hc/en-us/articles/115005165269-Fix-connection-issues

### Ledger Nano S constants ###
# Only Ledger Nano S is supported.
readonly LNS_VENDORID_PRODUCTID='2c97:0001'
# https://support.ledgerwallet.com/hc/en-us/articles/115005165269-Fix-connection-issues
# https://github.com/LedgerHQ/udev-rules/blob/master/add_udev_rules.sh
readonly LNS_UDEV_RULES_FILE='/etc/udev/rules.d/20-hw1.rules'
readonly LNS_ADD_UDEV_RULES_SCRIPT='/home/amnesia/Persistent/add_udev_rules.sh'

### Electrum Bitcoin Wallet constants ###
readonly ELECTRUM_DOWNLOAD_PATH='/home/amnesia/Persistent/Tor Browser/'
readonly ELECTRUM_LOGFILE='/home/amnesia/Persistent/electrum.log'
# Electrum uses wallet files version 17 since release 3.2.0 (2018-06-30).
readonly ELECTRUM_DEFAULT_WALLET='/home/amnesia/.electrum/wallets/empty_wallet_version_17'

# Detect Ledger Nano S.
if [[ -z "$(lsusb -d "${LNS_VENDORID_PRODUCTID}")" ]]; then
  echo 'Ledger Nano S has NOT been detected.'
  echo 'If one is connected unlock it. Then run this script again.'
  echo
  echo 'Do you wish to:'
  option_continue='continue without a hardware wallet?'
  option_stop='stop and exit?'
  PS3='Enter your choice (1 or 2) and press [ENTER]: '
  select option in "${option_continue}" "${option_stop}"; do
    case "${option}" in
      "${option_continue}") echo; break ;;
      "${option_stop}") exit 0 ;;
    esac
  done
else
  echo 'Ledger Nano S has been connected and unlocked.'
  if [[ -f "${LNS_UDEV_RULES_FILE}" ]]; then
    echo 'The udev rule for Ledger Nano S has been added already.'
  else
    echo 'The udev rule for Ledger Nano S will be added now.'
    sudo "${LNS_ADD_UDEV_RULES_SCRIPT}"
  fi
fi

# Check available Electrum versions.
installed_electrum_version="$(electrum version)"
echo "Installed: Electrum-"${installed_electrum_version}""
archive="$(ls "${ELECTRUM_DOWNLOAD_PATH}"Electrum-*.tar.gz | tail -1)"
downloaded_electrum_name="$(basename "${archive}" .tar.gz)"
echo "Downloaded: "${downloaded_electrum_name}""

# Untar downloaded Electrum archive.
if ! [[ -d ~/"${downloaded_electrum_name}" ]]; then
  echo "Sources: "${archive}""
  n_files="$(tar xvf "${archive}" -C ~ | wc --lines)"
  echo "Untared "${n_files}" files."
fi
cd ~/"${downloaded_electrum_name}"

# Run Electrum.
echo
echo 'Do you wish to:'
option_close="run "${downloaded_electrum_name}" and close Terminal?"
option_keep_open="run "${downloaded_electrum_name}" in Terminal?"
PS3='Enter your choice (1 or 2) and press [ENTER]: '
select option in "${option_close}" "${option_keep_open}"; do
  case "${option}" in
    "${option_close}")
      date > "${ELECTRUM_LOGFILE}"
      nohup python3 run_electrum -v --wallet "${ELECTRUM_DEFAULT_WALLET}" >> "${ELECTRUM_LOGFILE}" &
      sleep 5
      /bin/kill -KILL "${PPID}"
      # Exit is here.
      ;;
    "${option_keep_open}")
      echo
      echo 'run_electrum -v ...'
      python3 run_electrum -v --wallet "${ELECTRUM_DEFAULT_WALLET}"
      break
      ;;
  esac
done

exit 0