json-web-token

• algorithm, default to 'sha256', use jwt#getAlgorithms() to get the supported algorithms
• cb, the callback(errname, message, token)

jwt#decode(key, token, cb)

• key, your secret
• token, the JWT token
• cb, the callback(errname, message, decodedPayload, decodedHeader)

Example

var jwt = require('json-web-token');

var payload = {
  "iss": "my_issurer",
  "aud": "World",
  "iat": 1400062400223,
  "typ": "/online/transactionstatus/v2",
  "request": {
    "myTransactionId": "[myTransactionId]",
    "merchantTransactionId": "[merchantTransactionId]",
    "status": "SUCCESS"
  }
};

var secret = 'TOPSECRETTTTT';

// encode
jwt.encode(secret, payload, function (err, token) {
  if (err) {
    console.error(err.name, err.message);
  } else {
    console.log(token);

    // decode
    jwt.decode(secret, token, function (err_, decodedPayload, decodedHeader) {
      if (err) {
        console.error(err.name, err.message);
      } else {
        console.log(decodedPayload, decodedHeader);
      }
    });
  }
});