--- /dev/null
+<?php
+
+namespace Drupal\contact;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+
+/**
+ * Provides an interface defining a contact form entity.
+ */
+interface ContactFormInterface extends ConfigEntityInterface {
+
+ /**
+ * Returns the message to be displayed to user.
+ *
+ * @return string
+ * A user message.
+ */
+ public function getMessage();
+
+ /**
+ * Returns list of recipient email addresses.
+ *
+ * @return array
+ * List of recipient email addresses.
+ */
+ public function getRecipients();
+
+ /**
+ * Returns the path for redirect.
+ *
+ * @return string
+ * The redirect path.
+ */
+ public function getRedirectPath();
+
+ /**
+ * Returns the url object for redirect path.
+ *
+ * Empty redirect property results a url object of front page.
+ *
+ * @return \Drupal\core\Url
+ * The redirect url object.
+ */
+ public function getRedirectUrl();
+
+ /**
+ * Returns an auto-reply message to send to the message author.
+ *
+ * @return string
+ * An auto-reply message
+ */
+ public function getReply();
+
+ /**
+ * Returns the weight of this category (used for sorting).
+ *
+ * @return int
+ * The weight of this category.
+ */
+ public function getWeight();
+
+ /**
+ * Sets the message to be displayed to the user.
+ *
+ * @param string $message
+ * The message to display after form is submitted.
+ *
+ * @return $this
+ */
+ public function setMessage($message);
+
+ /**
+ * Sets list of recipient email addresses.
+ *
+ * @param array $recipients
+ * The desired list of email addresses of this category.
+ *
+ * @return $this
+ */
+ public function setRecipients($recipients);
+
+ /**
+ * Sets the redirect path.
+ *
+ * @param string $redirect
+ * The desired path.
+ *
+ * @return $this
+ */
+ public function setRedirectPath($redirect);
+
+ /**
+ * Sets an auto-reply message to send to the message author.
+ *
+ * @param string $reply
+ * The desired reply.
+ *
+ * @return $this
+ */
+ public function setReply($reply);
+
+ /**
+ * Sets the weight.
+ *
+ * @param int $weight
+ * The desired weight.
+ *
+ * @return $this
+ */
+ public function setWeight($weight);
+
+}