priv_call doesn't show a revert message, but "invalid params"

[CMajeri]

Description

As an user, I want to see revert messages on priv_call so that I can see errors.

Acceptance Criteria

I run priv_call on a private contract, the call reverts, and I see the revert reason.

Steps to Reproduce (Bug)

• Create a contract wih a revert in it in a public transaction.
• Trigger a revert using eth_call.
• Notice that the revert reason is there.
• Create the same contract in a private transaction.
• Call it using priv_call
• Notice that the revert reason isn't there

^ Is that expected or actually a bug?
I do see the revert reason when the tx gets mined, but I get "invalid params" when I just call it using priv_call.
This is very impractical when simulating calls to see if they'll work before sending them out.

[non-fungible-nelson]

@macfarla - related to RPC cleanup/invalid params? maybe add to #5098 ?

[NickSneo]

Hey @macfarla , are you working on this issue in your draft PR - #5241 ?

[macfarla]

@NickSneo that PR won't help private transactions, and it's only to expose more details about the "invalid params".
This issue is about the revert reason being hidden for private tx. So I think it's unrelated. Feel free to pick this one up!

[NickSneo]

@macfarla okay cool, thanks! Will pick this up!

[NickSneo]

Closing ticket as issue fixed with MR - #5369