> For the complete documentation index, see [llms.txt](https://docs.usdd.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.usdd.io/developers/core-contracts/migrate.md).

# Migrate

### **Purpose**

Enables seamless migration of USDDOLD to the new USDD version. This tool ensures users can upgrade at their convenience without deadlines.

### Key Responsibilities

* Converts legacy USDD tokens into the upgraded version.
* Simplifies the user transition process.

### Key Methods

* `migrate(usr, wad)`\
  Converts a specified amount of USDDOLD for a user.