Add on granted
Sent to your endpoint when Add-on granted occurs (addon.granted).
Signed as X-Dmly-Signature: sha256=<hmac> (HMAC-SHA256 of the raw body with your endpoint’s secret) when the endpoint has one, alongside X-Dmly-Event and X-Dmly-Delivery headers. Return any 2xx to acknowledge; a non-2xx is retried twice more, after roughly 10s then 60s (three attempts in total).

