How to show a message in phantom wallet while signing an anchor transaction?

Question

I was wondering how is it possible to show a message while signing an anchor transaction since it creates a transaction by itself unlike how you do using @solana/web3.js. I just want to let user know why he/she is signing the transaction.

For eg:

const tx = await program.methods.initialize().accounts({
       baseAccount: programPDA,
       authority: user.publicKey
       }).rpc();
            

So the above the method would direcly open the mobile wallet and ask the user to sign. But along with this i want to show the message why the person has to sign. A message like this Sign the transaction to initialize the PDA while signing the tx is what i want.

Can anybody tell me how is this possible?

Answer 1

As Trent mentioned, it is not possible.

Best practice is let them know beforehand. There could be popup that says something like:

Looks like you haven't been using SuperApp before.
We are creating a SuperApp account for you.
This will involve a small fee payable in SOL and
approving a transaction in your wallet.

                       [ Got It ]

And then afterwards sending the initialize instruction.