Refined request schema

src/models/mailer.js

@@ -42,7 +42,7 @@ const sendMail = promisify(transporter.sendMail).bind(transporter);
 
 module.exports = {
 	async sendMessage(template, request) {
-		const message = handlebars.compile(templatesModel.getTemplate(template))(request.vars || {});
+		const message = handlebars.compile(templatesModel.getTemplate(template))(request.vars);
 		
 		const mailer = {
 			from:    SMTP_SENDER,

src/schemas/request.js

@@ -9,7 +9,9 @@ module.exports = {
 		to:      stringRequiredSchema,
 		subject: stringRequiredSchema,
 		vars: {
-			type: Object
+			type:     Object,
+			required: true,
+			default:  () => ({})
 		}
 	}
 };