Slack file object

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Defines an object containing Slack file information to be used in an image block or image element.

This file must be an image and you must provide either the URL or ID. In addition, the user posting these blocks must have access to this file. If both are provided then the payload will be rejected. Currently only png, jpg, jpeg, and gif Slack image files are supported.

Fields

Field	Type	Description	Required?
url	string	This URL can be the url_private or the permalink of the Slack file.	Optional
id	string	Slack ID of the file.	Optional

Example

{
  "slack_file": {
      "url": "https://files.slack.com/files-pri/T0123456-F0123456/xyz.png",
  }
}

{
  "slack_file": {
      "id": "F0123456",
  }
}