node-redsys-api (npm): Node.js Redsys api implementation with new the key-hashed message authentication code (HMAC) SHA256 for the virtual payment gateway integration. This is a node.js port of the PHP API provided by [Redsys](http://www.redsys.es/)
Keywords: tpv|redsys|credit card|payment|servired|4b|HMAC SHA256