allOf:
  - $ref: "postcard_base.yml"
  - $ref: "../../../shared/models/form_factor/input_to.yml"
  - $ref: "../../../shared/models/form_factor/input_from_us.yml"

  - type: object

    required:
      - to
      - front
      - back

    properties:
      front:
        description: >
          The artwork to use as the front of your postcard.


          Notes:

          - HTML merge variables should not include delimiting whitespace.

          - PDF, PNG, and JPGs must be sized at 4.25"x6.25", 6.25"x9.25", or
          6.25"x11.25" at 300 DPI, while supplied HTML will be rendered to the
          specified `size`.


          See [here](#section/HTML-Examples) for HTML examples.
        oneOf:
          - $ref: "../../../shared/attributes/html_string.yml"
          - $ref: "../../../shared/attributes/model_ids/tmpl_id.yml"
          - $ref: "../../../shared/attributes/remote_file_url.yml"
          - $ref: "../../../shared/attributes/local_file_path.yml"

      back:
        description: >
          The artwork to use as the back of your postcard.


          Notes:

          - HTML merge variables should not include delimiting whitespace.

          - PDF, PNG, and JPGs must be sized at 4.25"x6.25", 6.25"x9.25", or
          6.25"x11.25" at 300 DPI, while supplied HTML will be rendered to the
          specified `size`.

          - Be sure to leave room for address and postage information by following the
          templates provided here:
            - [4x6 template](https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/4x6_postcard.pdf)
            - [6x9 template](https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/6x9_postcard.pdf)
            - [6x11 template](https://s3-us-west-2.amazonaws.com/public.lob.com/assets/templates/postcards/6x11_postcard.pdf)


          See [here](#section/HTML-Examples) for HTML examples.
        oneOf:
          - $ref: "../../../shared/attributes/html_string.yml"
          - $ref: "../../../shared/attributes/model_ids/tmpl_id.yml"
          - $ref: "../../../shared/attributes/remote_file_url.yml"
          - $ref: "../../../shared/attributes/local_file_path.yml"

      billing_group_id:
        $ref: "../../../shared/attributes/billing_group_id.yml"