ENS .ETH Dev API

Understand the boundary

An ENS integration adds a naming layer to an address-based workflow. Treat the entered name as user input, normalize it using the relevant supported library or specification, and resolve the record needed for the task. Keep the original input, normalized name, resolved value, and observation context distinguishable. Resolution is a data lookup, not a statement that the target is trustworthy.

A practical starting project

Design a read-only address-lookup view that shows the normalized name and resolved address before a user takes any consequential action elsewhere. Handle an unset record and a failed lookup separately. Use a deliberate cache policy and re-check the relevant record when freshness is important to the action being proposed.

Where integrations go wrong

Do not infer that a reverse record establishes identity without the corresponding verification process. Avoid treating a familiar-looking name as proof of ownership or safety. Keep signing outside the lookup interface, and do not automatically replace a reviewed destination when a name record changes. The user must be able to see what address the name currently represents.

Reference for implementation: ENS address lookup documentation. Check the official reference for the specific version and environment you plan to use. The exercise above is an engineering starting point, not a live DevAPI.com service.