Subdomains

Subdomains are not ERC721 compliant. The base registrar is the ERC721 contract that is the owner of the .bera node.

If you already own a .bera domain name you can create as many subdomains as you want at no additional cost.

You can create subdomains by calling the setSubnodeRecord function of the BNS registry. This function takes the parent node and the label of the subdomain to create.

   registry.setSubnodeRecord(bytes32 parentNode, bytes32 label, address owner, address resolver, uint64 ttl)

where:

• parentNode is the node of the parent domain.

• label is the keccak256 hash of the subdomain label to register.

• owner is the address of the new owner of the subdomain.

• resolver is the address of the resolver of the subdomain.

• ttl is optional and if not provided the default ttl will be used.

The subdomain will be registered under the parent node and the label provided. The subdomain will have its own resolver, and the owner of the subdomain will be able to update it at any time. If the resolver is not provided, the resolver of the parent node will be found during the resolution process provided that the universal resolver is used.

In order to "delete" a subdomain, the owner of the subdomain can call the setSubnodeRecord function of the BNS registry with the same parent node, label, and setting the owner and the others record associated to the subdomain to the zero address. If more records than the resolver have been set for the subdomain, they will need to be explicity "deleted" by setting them to the zero address using the set* functions of the resolver.

To reclaim and register the same subdomain again it will be sufficient to call the setSubnodeRecord function of the BNS registry with the same parent node and label.