I currently try to sign a tx using OpenSSL. After some tinkering I think I got most of the tx right but Electrum complains with
mandatory-script-verify-flag-failed (Non-canonical signature: S value is unnecessarily high) which is probably because of BIP62.
Is there a way to create proper signatures with OpenSSL except trying and hoping to get a small
The rest of my code is in Golang and I couldn't find a proper packages for the used ECDSA curve and so wrapped around OpenSSL.