Unlock tokens before melting to avoid an extra swap

[gudnuf]

Currently, meltTokens does not support passing in a locked token along with a privkey to unlock it.

When claiming a locked token from an untrusted mint, for example, I have to do something like:

const unlockedProofs = await wallet.receiveTokenEntry(
         {
            lockedProofs,
            mint: wallet.mint.mintUrl,
         },
         { privkey },
);

wallet.meltTokens(meltQuote, unlockedProofs)

Is there a reason that meltTokens does not directly support melting tokens?

It would be nice to simply pass a privkey opt to meltTokens, and have a signature be produced rather than having to do a swap before being able to melt.