Deep linking with Brnach.IO with sendGrid integration issue as passing params is undefined while opening link from mail using React native - react-native

Question

Goal
I am sending email with deep linking implementation with Branch.IO with sendGrid integration. While user click on link my react native app open in phone and redirect me to screen based on query params in url which i have provided during create link in API.
Problem
I am able to open app from link but query params i have provide in link is display as blank. so i am not able to open screen where i want to redirect to user in app.
branch.subscribe(({ params, error, uri }) => {
if (error) {
console.log('Error from Branch: ' + error)
return
}
console.log("params :: ", params);
if(params.reset) {
// Redirect user to reset password screen
console.log("params.reset :: " + params.reset);
Actions.resetpassword({resetToken: params.reset});
} else if(params.verify) {
// Verify signup user
axios.post('http://localhost:3030/authmanagement', {
"action":"verifySignupLong",
"value": params.verify
}).then(response => {
Actions.login({isVerifySuccess: true});
}, error => {
Actions.login();
});
}
});
I have write this code as suggest Branch.IO documentation. In params i have send reset and verify token which i got as blank string.
Information
This code is working without integration with sendGrid in deep linking. But for mailing tracking i used sendGrid. So when i try to email with sendGrid it will create problem.
I have setup Link Branding in SendGrid account and also add CNAME in my domain as given in instruction of sendGrid integration for deep linking.
I have check mailed link in Redirect Detective portal
I have verified link and it will generate valid url with params. please look into below image for more clarification

Answer 1

Jackie from Branch here.
Based on your redirect link, there seems to be an issue with the SendGrid integration. Could you make sure your integration is properly set up by following the instructions here?
For some context, this is what a link should look like within your email template: http://example.com/?foo=bar
When a user clicks your link in the email, Branch processes the link and converts it to something like this:
https://vza3.app.link/3p?%243p=e_xx&%24original_url=http%3A%2F%2Fexample.com%2F%3Ffoo%3Dbar
(Where vza3.app.link is your Branch domain.)
Also, in order for SendGrid to know that the email link should deep-link and open the app, add universal="true" to the HTML, like so:
Link to your app!
If you continue to experience issues with passing deep link data via SendGrid email tracking, please reach out to us directly at integrations#branch.io with your Branch key and the link(s) you're using.