# require_mandatory_flags · FT4 Rell API · Chromia Docs (concept)

> function require_ mandatory_ flags(auth_ descriptor: auth_descriptor ) Checks that the auth descriptor contains all the flags deemed necessary for this dap

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.accounts/require_mandatory_flags/

FUNCTION

# require\_mandatory\_flags

```signature
function require_mandatory_flags(auth_descriptor: auth_descriptor)
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/accounts/module.rell#lines-434)

Checks that the auth descriptor contains all the flags deemed necessary for this dapp.

Throws `"MISSING MANDATORY FLAGS"` if some are missing.

**Parameters**

* **auth\_descriptor** — the auth descriptor to check.

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.ft4.core.accounts/require_mandatory_flags.html)Generated API reference, mirrored from the live docs