We are building a custom agent desktop wrapper using React and C# backend services. The frontend handles authentication via the Genesys Cloud implicit grant flow. After the user logs in, we receive the access_token and id_token in the URL fragment. We are trying to validate these tokens on the client side before making any API calls to ensure they are still valid and signed by the correct issuer.
The problem is that the id_token seems to be expiring faster than expected, or perhaps we are not refreshing it correctly. When we try to decode the token using jwt-decode, we get the payload, but the exp claim often indicates the token is already expired, even though the user just logged in. We are using the @genesyscloud/purecloud-platform-client-v2 SDK for some API calls, but for the initial auth validation, we are doing it manually in React.
Here is the validation logic we are using in the useEffect hook:
const token = localStorage.getItem('genesys_token');
if (token) {
const decoded = jwtDecode(token);
const now = Math.floor(Date.now() / 1000);
if (decoded.exp < now) {
console.warn('Token expired');
handleLogout();
}
}
The handleLogout function clears the local storage and redirects to the login page. However, users are being logged out randomly, sometimes within minutes of logging in. We suspect the id_token from the implicit grant has a very short lifespan, or maybe we should be using the access_token for validation instead. The API calls to /api/v2/users/me work fine when the token is fresh, but fail with 401 Unauthorized when the token is considered expired by our check.
Is there a specific way to validate the implicit grant token in a React app? Should we be relying on the SDK’s token management, or is there a recommended way to handle token refresh without re-prompting the user for credentials? We want to avoid the extra round trip to the Genesys Cloud API just to check if the token is valid.