code: def save_user_pubaddr(data, environ=None):
      """
      Saves the user's public addresses and their related metadata in
      the corresponding addresses.json file.
  
      Parameters
      ----------
      data: dict
  
      Returns
      -------
      True
  
      """
      marketplace_folder = get_marketplace_folder(environ)
      filename = os.path.join(marketplace_folder, "addresses.json")
  
      with open(filename, "w") as f:
          json.dump(
              data, f, sort_keys=False, indent=2, separators=(",", ":")
          )
  
      return True
  
file_path: catalyst/catalyst/marketplace/utils/path_utils.py
imports: import os
  import json
  import tarfile
  from catalyst.constants import SUPPORTED_WALLETS
  from catalyst.utils.deprecate import deprecated
  from catalyst.utils.paths import data_root, ensure_directory
  from catalyst.marketplace.marketplace_errors import MarketplaceJSONError
label_desc: Use image node_id 8 for calling a global function with example usage: save_user_pubaddr(data, environ) and returns: True