completed SMS gateway project

app/jobs/retry_failed_sms_job.rb

@@ -0,0 +1,22 @@
+class RetryFailedSmsJob < ApplicationJob
+  queue_as :default
+
+  def perform(sms_message_id)
+    sms = SmsMessage.find(sms_message_id)
+
+    # Only retry if message can be retried
+    return unless sms.can_retry?
+
+    # Reset status to queued and increment retry count
+    sms.increment_retry!
+    sms.update!(status: "queued", error_message: nil)
+
+    # Re-queue for sending with exponential backoff
+    wait_time = (2 ** sms.retry_count).minutes
+    SendSmsJob.set(wait: wait_time).perform_later(sms.id)
+
+    Rails.logger.info("Retrying failed SMS #{sms.message_id} (attempt #{sms.retry_count})")
+  rescue ActiveRecord::RecordNotFound => e
+    Rails.logger.error("SMS message not found: #{e.message}")
+  end
+end