[Feature Request] - Connect and Sign in one go

[GrimLothar]

I'm looking for a way to Connect and Sign to wallet on mobile (iOS/Android/Saga) with a single transaction. Currently you first have to connect (takes you from your app to the wallet, and then back) and THEN sign a message (again takes you from your app to the wallet and back). This is a very bad experience for the end user.

Ideally Sign In With Solana would also work, but it should still work with the old way of connect + sign for wallets that don't support SIWS

Thanks!

[qapquiz]

@GrimLothar I think we can try to implement Sign In with Solana (SIWS) (only work for phantom for now https://phantom.app/learn/developers/sign-in-with-solana) should be improve a lot of UX. but only for one wallet. What do you think?

[GabrielePicco]

SIWS has been added to the WA in anza-xyz/wallet-adapter#783.
The Unity WA implementation could be extended to support "Sign In" cross wallet