Amazon Pinpoint Custom Message Activity Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/amazon-pinpoint/refs/heads/main/json-structure/amazon-pinpoint-custom-message-activity-structure.json",
  "name": "CustomMessageActivity",
  "description": "The settings for a custom message activity. This type of activity calls an AWS Lambda function or web hook that sends messages to participants.",
  "type": "object",
  "properties": {
    "DeliveryUri": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "<p>The destination to send the campaign or treatment to. This value can be one of the following:</p> <ul><li><p>The name or Amazon Resource Name (ARN) of an AWS Lambda function to invoke to handle delivery of the campaign or treatment.</p></li> <li><p>The URL for a web application or service that supports HTTPS and can receive the message. The URL has to be a full URL, including the HTTPS protocol.</p></li></ul>"
        }
      ]
    },
    "EndpointTypes": {
      "allOf": [
        {
          "$ref": "#/components/schemas/ListOf__EndpointTypesElement"
        },
        {
          "description": "The types of endpoints to send the custom message to. Each valid value maps to a type of channel that you can associate with an endpoint by using the ChannelType property of an endpoint."
        }
      ]
    },
    "MessageConfig": {
      "allOf": [
        {
          "$ref": "#/components/schemas/JourneyCustomMessage"
        },
        {
          "description": "Specifies the message data included in a custom channel message that's sent to participants in a journey."
        }
      ]
    },
    "NextActivity": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The unique identifier for the next activity to perform, after Amazon Pinpoint calls the AWS Lambda function or web hook."
        }
      ]
    },
    "TemplateName": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "The name of the custom message template to use for the message. If specified, this value must match the name of an existing message template."
        }
      ]
    },
    "TemplateVersion": {
      "allOf": [
        {
          "$ref": "#/components/schemas/__string"
        },
        {
          "description": "<p>The unique identifier for the version of the message template to use for the message. If specified, this value must match the identifier for an existing template version. To retrieve a list of versions and version identifiers for a template, use the <link  linkend=\"templates-template-name-template-type-versions\">Template Versions</link> resource.</p> <p>If you don't specify a value for this property, Amazon Pinpoint uses the <i>active version</i> of the template. The <i>active version</i> is typically the version of a template that's been most recently reviewed and approved for use, depending on your workflow. It isn't necessarily the latest version of a template.</p>"
        }
      ]
    }
  }
}