Designing Asynchronous Multiparty Protocols with Crash-Stop Failures (Artifact)

We introduce Teatrino, a toolchain that supports
handling multiparty protocols with crash-stop fail-
ures and crash-handling behaviours. Teatrino
accompanies the novel MPST theory in the related
article, and enables users to generate fault-tolerant
protocol-conforming Scala code from Scribble
protocols. Local types are projected from the global
protocol, enabling correctness-by-construction, and
are expressed directly as Scala types via the
Effpi concurrency library. Teatrino extends both
Scribble and Effpi with support for crash-stop
behaviour. The generated Scala code is execut-
able and can be further integrated with existing
systems. The accompanying theory in the related
article guarantees deadlock-freedom and liveness
properties for failure handling protocols and their
implementation. This artifact includes examples,
extended from both session type and distributed
systems literature, featured in the related article.