I have been writing a (yet another) Bitcoin python library primarily for educational purposes; for me and my students.
Signing a non-segwit transaction results in a signed tx that is identical to what Bitcoin Core produces.
However, signing a segwit tx results in a signed tx that is valid but different to what Bitcoin Core produces. The signature created is different.
I have seen another post that mentions lax and strict DER encodings. Is this relevant, and if yes, does it only applies when signing segwit inputs?
What am I missing?
EDIT: the signature from the library is: 483045022100debdd831b8f144afcaa4e9cb71713ec657292ac09d163e827dc1d458417841a70220292b6f250e4ad94ec2b3f062129b85620c22be9be97f8a42346612de8fc423200121
And from Bitcoin core: 4730440220413d31dcd84594d2bf1408d41ec6913694b7936c2cc598f436a4709cd2d70264 02201b646f18fa4108ee19d103d427c2323a0f221e33ecb65bed0690ec69c478b8800121