Custom Username Namespaces - Lens

This guide explains how Builders can create and manage Custom Username Namespaces, which are app- or group-specific namespaces that can govern username issuance, monetization and more through Username Rules. To create one, a Builder constructs and uploads a Namespace Metadata object, then deploys a Lens Namespace smart contract with the createUsernameNamespace action. The guide also covers fetching a namespace by address or transaction hash with fetchNamespace, searching namespaces with fetchNamespaces, and access control, where the Owner can transfer ownership and Administrators can update metadata, rules and extra data.