Reveal Wallet Code

A linked wallet's code and 12-word phrase, for the account's owner.

Asks for the current password, not just the session: the session reads a wallet but cannot spend it, and the code can — a stolen session must not be one step from the balance. A wrong password counts against the account like a wrong login, and a right one is followed by a letter to the account's address: whoever read the code keeps it, so the owner hears. 409 code_unavailable when no code is kept: linking the wallet again with its code keeps it.