TypeError: `Vonage\SMS\Webhook\InboundSMS::getKeyword()`: Return value must be of type string, null returned

[ankurk91]

The keyword can be null in incoming SMS Webhook payload

Expected Behavior

The vonage SDK must allow null keyword

Current Behavior

Vonage SDK throws error when null keyword is received

TypeError: `Vonage\SMS\Webhook\InboundSMS::getKeyword()`: Return value must be of type string, null returned

Possible Solution

Assign empty string in src/SMS/Webhook/InboundSMS.php

 $this->keyword = $data['keyword'] ?? '';

or

public function getKeyword(): ?string
    {
        return $this->keyword;
    }

Steps to Reproduce (for bugs)

Context

Incoming webhook payload JSON

{
  "to": "123456789",
  "sig": "dbbb7c772af79ce264096990cfb92739",
  "text": "Valid text was here",
  "type": "text",
  "nonce": "f37c8ecf-ad90-453b-8c1d-198cd8dd3045",
  "concat": "true",
  "msisdn": "123456789",
  "api-key": "SECRET",
  "keyword": null,
  "messageId": "3E0000003AA1A11F",
  "timestamp": "1691444462",
  "concat-ref": "3",
  "concat-part": "2",
  "concat-total": "2",
  "message-timestamp": "2023-08-07 21:41:02"
}

The messageId is real here

Your Environment

• Version used: latest
• Environment name and version: php 8.2
• Operating System and version: Ubtuntu 22.04

[SecondeJK]

Fixed by #440