feature/IO-2885-IntelliPay-App-Postback

- Refactor / Add Tests

server/intellipay/lib/handlePaymentValidationError.js

@@ -0,0 +1,18 @@
+/**
+ * @description Log validation error and send response
+ * @param res
+ * @param logger
+ * @param logCode
+ * @param message
+ * @param logMeta
+ * @returns {*}
+ */
+const handlePaymentValidationError = (res, logger, logCode, message, logMeta) => {
+  logger.log(logCode, "ERROR", "api", null, {
+    message,
+    ...logMeta
+  });
+  return res.status(400).send(`Bad Request: ${message}`);
+};
+
+module.exports = handlePaymentValidationError;