im trying to follow this tutorial - https://zokrates.github.io/sha256example.html
I built zokrates docker provided and copied the source code to the docker, and then tried to compile the code.
here is the code:
import "LIBSNARK/sha256packed" def main(private field a, private field b, private field c, private field d) -> (field): h = sha256packed([a,b,c,d]) return h
However, i faced following error messages:
Compilation failed: Semantic error: Function definition for function sha256packed with signature (field) -> (_) not found.
what is wrong with this work?