How to keep track of the original msg.sender on Chainlink VRF fullfillRandomWords function?

Question

I'm using Chainlink VRF to get a random number, but I need to keep track of the msg.sender that calls requestRandomWords when the fulfillRandomWords is fired. In other words I need the same msg.sender inside the fulfillRandomWords and in my tests it changes. How can I achieve that?

Answer 1

After see the Chainlink docs, I ended up using a mapping to store the requestId for a specific address. This allowed me to keep track of the sender.

mapping(uint256 => address) private requestIdToRequester;

Answer 2

You can look into tx.origin global variable to achieve what you need. However, please understand that it has security issues.