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

> @mount("ft4.add_ auth_ descriptor")
operation add_ auth_ descriptor(new_ desc: auth_descriptor ) Adds a new auth descriptor to an account. The account in q

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

OPERATION

# add\_auth\_descriptor

```signature
@mount("ft4.add_auth_descriptor")
operation add_auth_descriptor(new_desc: auth_descriptor)
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/external/accounts/operations.rell#lines-181)

Adds a new auth descriptor to an account. The account in question will be
the account which is referred to by the preceding auth operation.

Must be signed by an auth descriptor with `accounts.auth_flags.ACCOUNT`
that is already associated with the account, as well as the signer of the new auth
descriptor.
In case the new auth descriptor is a multi sig auth descriptor, every signer
that is part of the auth descriptor must sign this operation, even if the number of
required signatures is less than the number of signers.

**Parameters**

* **new\_desc** — the auth descriptor to add to the account

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