| Name | Type | Description | Notes |
|---|---|---|---|
| r#type | String | Attachment type (image, video, file, sticker, audio, share) | |
| original_type | Option<String> | Instagram and Facebook only, and present only when it differs from type. Meta's own attachment type before Zernio normalized it. See the same field on message.received for the full mapping. |
[optional] |
| url | String | Where to fetch the attachment. For outgoing messages this is the media URL as sent, so for WhatsApp it is the URL you supplied when publishing (WhatsApp sends media by link), not a Zernio endpoint, and it needs no Zernio credentials. Contrast the inbound direction: message.received attachment URLs on WhatsApp point at the authenticated GET /v1/whatsapp/media/{mediaId}. As on message.received, webhook attachments carry no refreshUrl: that field is stamped only on the REST read. Resolve Instagram and Facebook media through GET /v1/inbox/conversations/{conversationId}/messages/{messageId}/attachments/{index}?accountId={accountId}. |
|
| payload | Option<serde_json::Value> | Additional attachment metadata | [optional] |