Boolean formatter

src/Formatters/BooleanFormatter.php

@@ -0,0 +1,33 @@
+<?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;
+
+class BooleanFormatter implements IFormatter
+{
+    /**
+     * format
+     * 
+     * @param mixed $value
+     * @return int
+     */
+    public static function format($value)
+    {
+        if (!is_bool($value)) {
+            throw new InvalidArgumentException('The value to inputFormat function must be boolean.');
+        }
+        return (int) $value;
+    }
+}