- README added

Author: Antonio Buedo

README.md

@@ -0,0 +1,99 @@
+bitpay/bitpay-php-keyutils
+=================
+
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://raw.githubusercontent.com/bitpay/bitpay-php-keyutils/master/LICENSE.md)
+[![Packagist](https://img.shields.io/packagist/v/bitpay/key-utils.svg?style=flat-square)](https://packagist.org/packages/bitpay/key-utils)
+[![Total Downloads](https://poser.pugx.org/bitpay/key-utils/downloads.svg)](https://packagist.org/packages/bitpay/key-utils)
+[![Latest Unstable Version](https://poser.pugx.org/bitpay/key-utils/v/unstable.svg)](https://packagist.org/packages/bitpay/key-utils)
+
+This dependency file provides utilities for use with the BitPay API. It enables creating keys, retrieving public keys, retrieving private keys, creating the SIN that is used in retrieving tokens from BitPay, and signing payloads for the `X-Signature` header in a BitPay API request.
+
+# Installation
+
+## Composer
+
+### Install Composer
+
+```bash
+curl -sS https://getcomposer.org/installer | php
+```
+
+### Install via composer by hand
+
+Add to your composer.json file by hand.
+
+```javascript
+{
+    ...
+    "require": {
+        ...
+        "bitpay/key-utils": "~1.0"
+    }
+    ...
+}
+```
+
+Once you have added this, just run:
+
+```bash
+php composer.phar update bitpay/key-utils
+```
+
+### Install using composer
+
+```bash
+php composer.phar require bitpay/key-utils:~1.0
+```
+
+# Usage
+
+## Autoloader
+
+To use the library's autoloader (which doesn't include composer dependencies)
+instead of composer's autoloader, use the following code:
+
+```php
+<?php
+$autoloader = __DIR__ . '/relative/path/to/Bitpay/Autoloader.php';
+if (true === file_exists($autoloader) &&
+    true === is_readable($autoloader))
+{
+    require_once $autoloader;
+    \Bitpay\Autoloader::register();
+} else {
+    throw new Exception('BitPay Library could not be loaded');
+}
+```
+
+## Documentation
+
+Please see the [examples.php](https://github.com/bitpay/bitpay-php-keyutils/blob/master/examples.php) script for examples on using this library.
+
+# Support
+
+* https://github.com/bitpay/bitpay-php-keyutils/issues
+* https://support.bitpay.com
+
+# License
+
+MIT License
+
+Copyright (c) 2019 BitPay
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

examples.php

@@ -8,6 +8,8 @@
 /**
  * Generate new private key for every new merchant.
  * Make sure you provide an easy recognizable name for each private key/Merchant
+ * NOTE: In case you are providing the BitPay services to your clients,
+ *       you MUST generate a different key per each of your clients
  *
  * WARNING: It is EXTREMELY IMPORTANT to place this key files in a very SECURE location
  **/