Contracts in distributed systems

We present a parametric calculus for contract-based computing in distributed systems. By abstracting from the actual contract language, our calculus generalises both the contracts-as-processes and contracts-as-formulae paradigms. The calculus features primitives for advertising contracts, for reaching agreements, and for querying the fulfilment of contracts. Coordination among principals happens via multi-party sessions, which are created once agreements are reached. We present two instances of our calculus, by modelling contracts as (i) processes in a variant of CCS, and (ii) as formulae in a logic. With the help of a few examples, we discuss the primitives of our calculus, as well as some possible variants.

# Logic, programming, and type systems # Computer Science # Distributed systems and fault tolerance # Multi-Agent Systems and Negotiation

Massimo Bartoletti, Emilio Tuosto, Roberto Zunino (2011). "Contracts in distributed systems". Electronic Proceedings in Theoretical Computer Science. https://doi.org/10.4204/eptcs.59.11