SwiftNonce

Thanks for clarifying! But your link didn’t mention Electrum, just saying... I guess I’ll have to follow those steps. A bit tedious.

So I tried to broadcast a signed transaction from an old Electrum version (like 1.7x). I check it on coinb.in and it's valid. But when I try to broadcast it, I get errors like 'scriptsig-not-pushonly'. It's frustrating…