#
# Created by @PhilippIRL
# Windows, non MS-Store version only (but if you change the file path it might work on other operating systems too)
#
# This script patches Spotify's offline.bnk file (this file caches the remote config) to trick Spotify into thinking that your account is enabled for dev tools.
# Spotify will automatically revert this local change after some time when it next fetches the remote config.
#

import os, sys

# path of offline.bnk on windows (non ms-store)
filePath = os.environ['LOCALAPPDATA'] + '\\Spotify\\offline.bnk'

file = open(filePath, 'r+b')
content = file.read()

# find last occurence of string 'app-developer'
loc = content.rindex(b'app-developer')

# 15 bytes after this string is the location we want to patch
patchLoc = loc + 15

# only patch if the value is what we expect
if not (content[patchLoc] == 48 or content[patchLoc] == 50):
    print('Unexpected value', content[patchLoc])
    sys.exit(1)

file.seek(patchLoc)

# change one byte to 50 (ascii '2')
file.write(bytes([50]))

file.close()