examples/par-greeter/air-scripts/air_fold.clj

(xor
    (seq
        (seq
            (seq
                (seq
                    (call relay ("op" "identity") [])
                    (call node (echo_service "echo") [names]  array_result)
                )
                (seq
                    (call relay ("op" "identity") [])
                    (call %init_peer_id% (returnService "run") [array_result])
                )
            (seq
                (fold array_result item
                    (seq
                        (call node (greeting_service "greeting") [item] greeter_results[])
                        (next item)
                    )
            )
        )
        (seq
            (call relay ("op" "identity") [])
            (call %init_peer_id% ("returnService" "run") [greeter_results])
        )
    )
    (seq
        (call relay ("op" "identity") [])
        (call %init_peer_id% (returnService "run") ["XOR FAILED" %last_error%])
    )
)