Optionalbiz_opaque_callback_data?: stringOptionalcontext?: { message_id: string }The message to reply to
The message id to reply to
The messaging product
Optionalrecipient_identity_key_hash?: stringThe recipient's identity key hash, used to detect profile changes by the user. If provided, the API will not deliver if the server hash doesn't match.
Currently you can only send messages to individuals
The user's phone number
An arbitrary 512B string, useful for tracking.
Any app subscribed to the messages webhook field on the WhatsApp Business Account can get this string, as it is included in statuses object within webhook payloads.
Cloud API does not process this field, it just returns it as part of sent/delivered/read message webhooks.