Function derive_to_path 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn derive_to_path(
    master_xprv: *const c_char,
    derivation_path: *const c_char,
) -> *mut c_char

Derives child keys from a master xprv. Allows passing a custom derivation path string.

Safety

• This function is unsafe because it dereferences and a returns raw pointer.
• ENSURE that result is passed into cstring_free(ptr: *mut c_char) after use.