add eth_signTransaction to the RPC API

[wighawag]

as mentioned here : #636
eth_sendTransaction is doing 2 things: signing and sending

since we already have eth_sendRawTransaction we would just need the extra method : eth_signTransaction

eth_sendTransaction would then be used as a convenient option only.

Rationale:

eth_signTransaction is useful in situations where you want to control when the transaction is broadcasted to the network. Currently there is no way to get a signed transaction out of the user without sending to the network at the same time.

[frozeman]

@bas-vk don't we have that already?

[onbjerg]

Doesn't seem to be documented at least. eth_sign adds a prefix to the message being signed, so wouldn't work for transactions.

[ghost]

Totally behind this. I think there needs to be a more robust RPC interface in general. This one in particular would be super useful for dapps that want to use Raiden-like capabilities in their code.

[leonardinius]

Just to drop the note, we also would like to see that as part of public (read documented) JSON-RPC APIs, also to simplify and prevent double spend issues.

Do you happen to have some ETAs or some other indications when (and if likely at all) we will see that happen?

[github-actions]

There has been no activity on this issue for two months. It will be closed in a week if no further activity occurs. If you would like to move this EIP forward, please respond to any outstanding feedback or add a comment indicating that you have addressed all required feedback and are ready for a review.

[github-actions]

This issue was closed due to inactivity. If you are still pursuing it, feel free to reopen it and respond to any feedback or request a review in a comment.