Installation

Download latest library release from here

Extract the library into a directory in your project (example: libs/MerchantOP) and add the path to composer autoloader

your-project/composer.json

{
    ...
    "autoload": {
        "psr-4": {
          ...
          "MerchantOP\\": "libs/MerchantOP/src"
        }
      }
}

composer dumpautoload