diff --git a/src/Formatters/PostFormatter.php b/src/Formatters/PostFormatter.php
new file mode 100644
index 0000000..cf5c49f
--- /dev/null
+++ b/src/Formatters/PostFormatter.php
@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * This file is part of web3.php package.
+ * 
+ * (c) Kuan-Cheng,Lai <alk03073135@gmail.com>
+ * 
+ * @author Peter Lai <alk03073135@gmail.com>
+ * @license MIT
+ */
+
+namespace Web3\Formatters;
+
+use InvalidArgumentException;
+use Web3\Utils;
+use Web3\Formatters\IFormatter;
+use Web3\Formatters\QuantityFormatter;
+
+class PostFormatter implements IFormatter
+{
+    /**
+     * format
+     * 
+     * @param mixed $value
+     * @return string
+     */
+    public static function format($value)
+    {
+        if (isset($value['priority'])) {
+            $value['priority'] = QuantityFormatter::format($value['priority']);
+        }
+        if (isset($value['ttl'])) {
+            $value['ttl'] = QuantityFormatter::format($value['ttl']);
+        }
+        return $value;
+    }
+}
\ No newline at end of file