# Messaging ## Overview The Client Gateway supports the transmission and reception of messages and large files. Alternatively, participants can exchange messages through the Message Box when the `Message Forms` option is enabled. In this case, users can leverage a dynamically generated form, automatically populated based on the structure defined in the uploaded JSON schema. *** ## User Guide ### Pre-requisites * Authorization to Client Gateway * Subcribe/publish channels * Topics ### Simple Messaging A message can be sent by uploading a JSON file that defines the desired channel and topic in Data Messaging File Upload and vice versa. #### Send a Message 1. Navigate to `Data Messaging` > `File Upload`. Choose channel name, topic and version before uploading a json file that matches the selected topic schema. Click `Save` to send the message

2. Success message will be shown, click `Close` to close modal or `View recipients` to see the recipient list and delivery status

#### Receive a Message 1. Navigate to `Data Messaging` > `File Download` and choose a channel by clicking on it

2. You will be redirected to topic list page, click on a topic to proceed

3. The message will be displayed, click on `View details` to see message content

4. Click `Download` to save the message as JSON file

### Large Data Messaging Schema types such as XML, TSV and CSV are classified as large data types and are being handled under Large Data Messaging within the Client Gateway. #### Uploading a File 1. Navigate to `Large Data Messaging` > `File Upload`. Choose channel name, topic and version before uploading a file that matches the selected topic schema. Click `Save` to send the message

2. Success message will be shown, click `Close` to close modal or `View recipients` to see the recipient list and delivery status

#### Downloading a File 1. Navigate to `Large Data Messaging` > `File Download` and choose a channel by clicking on it

2. You will be redirected to topic list page, click on a topic to proceed

3. The message will be displayed, click on download button to download the received file

### Messaging UI An alternative method for sending and receiving messages is through the Messaging UI. Instead of uploading a JSON file containing the message content, users can use the dynamic form to complete required and optional fields as defined by the selected topic's schema. #### Sending a message 1. Navigate to `Message Box` > `New Message`

2. Select a channel, topic name and version. Click `Next` to proceed

3. Fill the form and click `Next`

4. Review the JSON generated based on your form input in the previous step. Click `Send Message` to proceed

5. Success message will be shown, click `Dismiss` to close modal

#### Receiving a message 1. Navigate to `Message Box` > `My Messages` and click on the channel you would like to view message from

2. Click on `View Message` to see the message content

3. Entry view will be shown by default, you may also switch to JSON view to see the received message. Refer to the next section for replying a message

#### Replying a message 1. Click `Reply` directly in the view message modal or in the received messages list

2. Select a channel, topic name and version before clicking `Next`

3. Fill in the reply form and click `Next`

4. Review the JSON generated based on your form input in the previous step. Click `Send Message` to proceed

5. Success message will be shown, click `Dismiss` to close modal

#### Viewing sent messages 1. Navigate to `Message Box` > `Sent` and click on the channel you would like to view messages that you have sent to

2. Click on `View message`

3. The message will be displayed. You may also switch between entry or JSON view. Refer to the next section for viewing recipients

#### Viewing sent messages recipients 1. Click on `View recipients` in the sent messages page

2. The recipient list will be displayed. Click `x` to close modal