### How this function works The function will be triggered by a Pub/Sub event published with the specific topic `SEND_SENDGRID_TRANSACTIONAL_EMAIL`. The message should contain the email address of the person and the data will be used during the generation of the email. ### Prerequisites * You must have previous knowledge of **SendGrid**. ### Function details Here is an example of how to use the function when it is installed: ```js const dataBuffer = Buffer.from(JSON.stringify({ to: 'customer@mail.com', data: { customerName: 'John Snow', purchasedFunctionName: 'sendTransactionalEmail', purchasedAt: new Date(2021, 4, 1, 10, 0, 0).toString(), }, templateId: 'functionPurchasedTemplateId' })); await pubsub.topic('SEND_SENDGRID_TRANSACTIONAL_EMAIL').publish(dataBuffer); ``` So, the email will be sent according to the template specified by the templateId. For example, if the template is: ``` Dear , the function was purchased successfully at . ``` the sended email will be the following: ``` Dear John Snow, the function sendTransactionalEmail was purchased successfully at Sat May 01 2021 10:00:00. ``` ### Resources For more information about SendGrid, see: + [SendGrid Support](https://support.sendgrid.com/hc/en-us) + [SendGrid Sending email](https://sendgrid.com/docs/ui/sending-email/)