NDEF Record Structure

The HaLo URL NDEF record contains information about the chip's unique public keys as well as information about the last issued command and last returned response for that command. There is a proprietary interface allowing the user to issue arbitrary commands against the chip using the NDEF layer.

Redirecting a HaLo to a new URL

Currently all HaLos are fixed to the https://eth.vrfy.ch/ URL. This URL follows the redirects from the onchain Ethereum Reality Service ("ERS") registry. See ERS for more information on how to register a HaLo chip with the ERS registry to redirect it to a desired URL. All parameters in the URL are included on redirect.