# Fuses

A "fuse" is a permission or perk that can be granted/revoked on a name.

As the name implies, once the fuse is "burned", it cannot be unburned. Fuses will only reset when the **expiry** is reached.

There are **parent-controlled** and **owner-controlled** fuses:

## Parent-Controlled Fuses <a href="#parent-controlled-fuses" id="parent-controlled-fuses"></a>

Only the owner of the parent name can burn one of these fuses on a name. These can generally be thought of as "perks" that can be granted to a name, though they can be used in other ways.

* **PARENT\_CANNOT\_CONTROL:** Allows a parent owner to **Emancipate** a child name. After this is burned, the parent will no longer be able to burn any further fuses, and will no longer be able to replace/delete the child name. This fuse must be burned in order for any owner-controlled fuses to be burned on the name.
* **IS\_DOT\_PLS:** This fuse cannot be burned by users of the Name Wrapper, it is only set internally when a .pls 2LD is wrapped.
* **CAN\_EXTEND\_EXPIRY:** The owner of the child name will be able to extend their own expiry. Normally, only the parent owner can extend the expiry of a child name.
* **Custom Fuses:** There are 13 other parent-controlled fuses that are not reserved, and can be used in any custom way you want!

## Owner-Controlled Fuses

Either the owner of the name *or* the owner of the parent name can burn one of these fuses. These can generally be thought of as "permissions" that can be revoked on a name, though they can be used in other ways.

* **CANNOT\_UNWRAP:** The name will now be **Locked**, and can no longer be unwrapped. This fuse must be burned in order for any other owner-controlled fuses to be burned on the name.
* **CANNOT\_BURN\_FUSES:** No further fuses can be burned on the name.
* **CANNOT\_TRANSFER:** The name (wrapped NFT) can no longer be transferred.
* **CANNOT\_SET\_RESOLVER:** The resolver contract for the name can no longer be updated.
* **CANNOT\_SET\_TTL:** The TTL for the name can no longer be updated.
* **CANNOT\_CREATE\_SUBDOMAIN:** New subdomains can no longer be created.
* **Custom Fuses:** There are 10 other owner-controlled fuses that are not reserved, and can be used in any custom way you want!