Add rule EthereumAddress

Author: arifszn

resources/lang/en/validation.php

@@ -10,6 +10,7 @@
     'credit_card' => 'The :attribute must be a valid credit card number.',
     'data_uri' => 'The :attribute must have data uri format.',
     'divisible_by' => 'The :attribute must be divisible by :number.',
+    'ethereum_address' => 'The :attribute must be an Ethereum address.',
     'float_number' => 'The :attribute must be a float number',
     'image_url' => 'The :attribute must be a valid image URL.',
     'phone' => 'The :attribute must be a valid phone number.',

src/Rules/EthereumAddress.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Arifszn\AdvancedValidation\Rules;
+
+use Illuminate\Contracts\Validation\Rule;
+
+/**
+ * The field under validation must be an Ethereum address. Does not validate address checksums.
+ *
+ * @package Arifszn\AdvancedValidation\Rules
+ */
+class EthereumAddress implements Rule
+{
+    /**
+     * @var string
+     */
+    private $errorMessage;
+
+    /**
+     * Create a new rule instance.
+     *
+     * @param string|null $errorMessage   Custom error message.
+     * @return void
+     */
+    public function __construct(string $errorMessage = null)
+    {
+        $this->errorMessage = $errorMessage;
+    }
+
+    /**
+     * Determine if the validation rule passes.
+     *
+     * @param string $attribute
+     * @param mixed $value
+     * @return bool
+     */
+    public function passes($attribute, $value)
+    {
+        return preg_match('/^(0x)[0-9a-f]{40}$/i', $value);
+    }
+
+    /**
+     * Get the validation error message.
+     *
+     * @return string
+     */
+    public function message()
+    {
+        return $this->errorMessage ? $this->errorMessage : trans('advancedValidation::validation.ethereum_address');
+    }
+}