text: """Utility for loading Postgres wallet plug-in."""
  
  import logging
  import platform
  from ctypes import cdll, c_char_p
  
  EXTENSION = {"darwin": ".dylib", "linux": ".so", "win32": ".dll", "windows": ".dll"}
  LOADED = False
  LOGGER = logging.getLogger(__name__)
  
  
  def file_ext():
      """Determine file extension based on platform."""
      your_platform = platform.system().lower()
      return EXTENSION[your_platform] if (your_platform in EXTENSION) else ".so"
  
  
  def load_postgres_plugin(storage_config, storage_creds, raise_exc=False):
      """Load postgres dll and configure postgres wallet."""
      global LOADED, LOGGER
  
      if not LOADED:
          LOGGER.info("Initializing postgres wallet")
          stg_lib = cdll.LoadLibrary("libindystrgpostgres" + file_ext())
          result = stg_lib.postgresstorage_init()
          if result != 0:
              LOGGER.error("Error unable to load postgres wallet storage: %s", result)
              if raise_exc:
                  raise OSError(f"Error unable to load postgres wallet storage: {result}")
              else:
                  raise SystemExit(1)
          if "wallet_scheme" in storage_config:
              c_config = c_char_p(storage_config.encode('utf-8'))
              c_credentials = c_char_p(storage_creds.encode('utf-8'))
              result = stg_lib.init_storagetype(c_config, c_credentials)
              if result != 0:
                  LOGGER.error("Error unable to configure postgres stg: %s", result)
                  if raise_exc:
                      raise OSError(f"Error unable to configure postgres stg: {result}")
                  else:
                      raise SystemExit(1)
          LOADED = True
  
          LOGGER.info("Success, loaded postgres wallet storage")
  