Helper function for encrypt and decrypt 2c2p payment action api.
npm install node-2c2p
/**
* @param {String} xmlString xml string that you want to encrypt.
* @param {String} publicKeyPath path to your certificate file (this file you have to request from 2c2p)
* @return {String} encrypted xml string
*/
/**
* @param {String} encryptedXml encrypted reponse string from 2c2p payment action request.
* @param {String} privateKeyPath path to your pem file (this file you have to request from 2c2p)
* @return {String} string in xml
*/