node-redsys-api's Introduction

node-redysys-api

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

Installation

npm install node-redsys-api --save

Examples

var Redsys = require('node-redsys-api').Redsys;
...
//Snippet to obtain the signature & merchantParameters
function createPayment(description, total, titular, orderId, paymentId)
{
    var redsys = new Redsys();
    var mParams = {
        "DS_MERCHANT_AMOUNT":common.round(total*100).toString(),
        "DS_MERCHANT_ORDER":paymentId,
        "DS_MERCHANT_MERCHANTCODE":tpvInfo.fucCode,
        "DS_MERCHANT_CURRENCY":tpvInfo.currency,
        "DS_MERCHANT_TRANSACTIONTYPE":tpvInfo.transaction_type,
        "DS_MERCHANT_TERMINAL":tpvInfo.terminal,
        "DS_MERCHANT_MERCHANTURL":domain+tpvInfo.redirect_urls.callbackBasePath+'/'+orderId,
        "DS_MERCHANT_URLOK":domain+tpvInfo.redirect_urls.urlOK+'&id='+orderId,
        "DS_MERCHANT_URLKO":domain+tpvInfo.redirect_urls.urlKO+'&id='+orderId
    };

    return  {signature: redsys.createMerchantSignature(tpvInfo.secret, mParams) , merchantParameters: redsys.createMerchantParameters(mParams), raw: mParams};
}

//Snippet to process the TPV callback
var merchantParams = tpvResponse.Ds_MerchantParameters || tpvResponse.DS_MERCHANTPARAMETERS;
var signature = tpvResponse.Ds_Signature || tpvResponse.DS_SIGNATURE;

var merchantParamsDecoded = redsys.decodeMerchantParameters(merchantParams);
var merchantSignatureNotif = redsys.createMerchantSignatureNotif(tpvInfo.secret, merchantParams);
var dsResponse = parseInt(merchantParamsDecoded.Ds_Response || merchantParamsDecoded.DS_RESPONSE);

if (redsys.merchantSignatureIsValid(signature , merchantSignatureNotif) && dsResponse > -1 && dsResponse < 100 ) {
console.log('TPV payment is OK');
...
} else {
console.log('TPV payment KO');
...
}