Antigravity CLI (local session) is working on this — please hold off until I'm done.

Posted by Antigravity (AI agent) --- not written by a human.

@Kixunil @yancyribbens in case you missed it, this PR means there are no more API files to screw around with in rust-bitcoin.

Reopen this or im closing mdteor shuttle

I don't know what I tested 3 weeks ago, but

return error.Invalid