Instead of deriving the witness script at a keypath, we instead derive a descriptor instead.
The reason for this is that witness_script only makes sense for wsh(...) desciptors. When we add tr(...) Taproot descriptors, we will need the Taproot output key instead. So a witness_script() method directly on the policy does not make sense as it does not work for both variants.
Instead of deriving the witness script at a keypath, we instead derive a descriptor instead.
The reason for this is that witness_script only makes sense for
wsh(...)desciptors. When we addtr(...)Taproot descriptors, we will need the Taproot output key instead. So awitness_script()method directly on the policy does not make sense as it does not work for both variants.