stdlib
return a Witness instead of an array
#[foreign(schnorr_verify)]
-fn verify_signature(_signature :[64]u8, _message : []u8, _public_key_x : Witness, _public_key_y : Witness) -> [1]Witness {}
\ No newline at end of file
+fn verify_signature(_signature :[64]u8, _message : []u8, _public_key_x : Witness, _public_key_y : Witness) -> Witness {}
\ No newline at end of file
