Smart Contract events

Question

I am developing a Dapp that contains a notification between two Users. for example :

• User 1 (Student): send a transaction that contains data to be confirmed.

• User 2 (Professor): receive a notification to validate the student data.

• User 1 (Student): receive a notification about the professor answer.

is't possible to implement this use case using smart contract events? I took a look to web3.shh but it seems like it miss documentation

Answer 1

You can doing that by create your event in your Smart Contract like :

event StudentData(address indexed _professorAddr, string indexed _studentData)

Then, using web3 api you can watch/listen for this events by filtering on the professor address by exemple, and trigger any action, like a notification, when the event realise

See documentation about events listening.