ShhFilterValidator.

src/Validators/ShhFilterValidator.php

@@ -0,0 +1,55 @@
+<?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\Validators;
+
+use Web3\Validators\IValidator;
+use Web3\Validators\QuantityValidator;
+use Web3\Validators\HexValidator;
+use Web3\Validators\IdentityValidator;
+
+class ShhFilterValidator
+{
+    /**
+     * validate
+     *
+     * @param array $value
+     * @return bool
+     */
+    public static function validate($value)
+    {
+        if (!is_array($value)) {
+            return false;
+        }
+        if (isset($value['to']) && IdentityValidator::validate($value['to']) === false) {
+            return false;
+        }
+        if (!isset($value['topics']) || !is_array($value['topics'])) {
+            return false;
+        }
+        foreach ($value['topics'] as $topic) {
+            if (is_array($topic)) {
+                foreach ($topic as $subTopic) {
+                    if (HexValidator::validate($subTopic) === false) {
+                        return false;
+                    }
+                }
+                continue;
+            }
+            if (HexValidator::validate($topic) === false) {
+                if (!is_null($topic)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+}