Add Liquid functions

[FlorianHubl]

How can I add Liquid functions like asset_blinding_key_from_seed?
I already tried to remove the "--disable-elements" from the build-libwally.sh.
I have added the wally_elements.h in the module.modulemap but I can't access the functions.
How can I access the elements functions?

[Sjors]

Unfortunately I haven't maintained this library in several years and also haven't done any iOs/macOS development for a while.

You may also need to use a different fork libwally and/or use the secp256k1-zk fork of secp256k1 (IIRC the build scripts changes this).