Transfer money into Gemini exchange (no API, no Selenium)

gemini.sh

#!/bin/bash

# Exit on error or unset variable.
set -e
set -u

source .env

# TODO: Find a builtin way to do this.
function urldecode() {
  python -c "import sys, urllib as ul; print ul.unquote_plus(sys.argv[1])" "${1}"
}

# TODO: Find a builtin way to do this.
function urlencode() {
  python -c "import sys, urllib as ul; print ul.quote_plus(sys.argv[1])" "${1}"
}

function print_help() {
  echo "usage: ${0} amount"
}

if [ "${#}" -ne 1 ]; then
  print_help
  exit 1
fi

TRANSFER_AMOUNT="${1}"

# Get CSRF token.
curl \
  --silent \
  -b ./cookies \
  -c ./cookies \
  https://exchange.gemini.com/signin >/dev/null

csrf_token=$(cat cookies | grep GEMINI_SESSION | awk '{print $7}' | awk -F '=' '{print $2}')

# Attempt sign in.
curl \
  --silent \
  -b ./cookies \
  -c ./cookies \
  -H 'Pragma: no-cache' \
  -H 'Origin: https://exchange.gemini.com' \
  -H 'Accept-Encoding: gzip, deflate, br' \
  -H 'Accept-Language: en-GB,en-US;q=0.8,en;q=0.6' \
  -H 'Upgrade-Insecure-Requests: 1' \
  -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8' \
  -H 'Cache-Control: no-cache' \
  -H 'Referer: https://exchange.gemini.com/signin' \
  -H 'Connection: keep-alive' \
  --data "csrfToken=${csrf_token}&email=$(urlencode "${GEMINI_EMAIL}")&password=${GEMINI_PASSWORD}" \
  --compressed \
  https://exchange.gemini.com/signin >/dev/null

curl \
  --silent \
  -b ./cookies \
  -c ./cookies \
  -D ./headers \
  https://exchange.gemini.com >/dev/null

# Enter two factor code.
location=$(urldecode $(grep Location ./headers | awk '{print $2}'))
totp=$(oathtool --digits=7 --totp --time-step-size=10 "${GEMINI_TWO_FACTOR_SECRET}")

curl \
  --silent \
  -b ./cookies \
  -c ./cookies \
  -H 'Pragma: no-cache' \
  -H 'Origin: https://exchange.gemini.com' \
  -H 'Accept-Encoding: gzip, deflate, br' \
  -H 'Accept-Language: en-GB,en-US;q=0.8,en;q=0.6' \
  -H 'Upgrade-Insecure-Requests: 1' \
  -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8' \
  -H 'Cache-Control: no-cache' \
  -H 'Connection: keep-alive' \
  -H 'Content-Length: 117' \
  --data "token=${totp}&csrfToken=${csrf_token}&remember=true" \
  --compressed \
  "https://exchange.gemini.com${location%$'\r'}" >/dev/null

# Initiate transfer.
curl \
  --silent \
  -b ./cookies \
  -c ./cookies \
  -H 'Host: exchange.gemini.com' \
  -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0' \
  -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
  -H 'Accept-Language: en-GB,en;q=0.5' \
  -H 'Referer: https://exchange.gemini.com/deposit/usd/ach' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -H 'Connection: keep-alive' \
  -H 'Upgrade-Insecure-Requests: 1' \
  --data "csrfToken=${csrf_token}&amount=${TRANSFER_AMOUNT}&bankAccountUuid=${BANK_ACCOUNT_UUID}&emailOnAchLimitReset=true" \
  --compressed \
  https://exchange.gemini.com/deposit/usd/ach >/dev/null

rm -f ./cookies ./headers

echo "Finished initiating ${TRANSFER_AMOUNT} transfer"