{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:BUV5DFQRZOYWA4YKKZWTFQP5JD","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b5fe44f038a79cbfde9311794ddc2f480b46171cfa7beee1a62fb6ae2c9fbfa7","cross_cats_sorted":["cs.DC","cs.LO","cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-08-02T02:27:50Z","title_canon_sha256":"4673a476e1fa50db7ca8284c739f005f6a5212933498fac1ee18cf381ce22472"},"schema_version":"1.0","source":{"id":"1108.0471","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.0471","created_at":"2026-05-18T04:16:30Z"},{"alias_kind":"arxiv_version","alias_value":"1108.0471v1","created_at":"2026-05-18T04:16:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.0471","created_at":"2026-05-18T04:16:30Z"},{"alias_kind":"pith_short_12","alias_value":"BUV5DFQRZOYW","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BUV5DFQRZOYWA4YK","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BUV5DFQR","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:0cc271bb9e5f7cfacf699b2c353b666d82510cbed94bffd579cab88ea91d9e50","target":"graph","created_at":"2026-05-18T04:16:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"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","authors_text":"COSBI, Emilio Tuosto (Department of Computer Science, Italy), Massimo Bartoletti (Dipartimento di Matematica e Informatica, Roberto Zunino (DISI-Universita' degli Studi di Trento, UK), Universita' degli Studi di Cagliari, University of Leicester","cross_cats":["cs.DC","cs.LO","cs.SE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-08-02T02:27:50Z","title":"Contracts in distributed systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.0471","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9ddffb6405bf8470830458a144000154b6c13e3447b48903227524ce6305a219","target":"record","created_at":"2026-05-18T04:16:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b5fe44f038a79cbfde9311794ddc2f480b46171cfa7beee1a62fb6ae2c9fbfa7","cross_cats_sorted":["cs.DC","cs.LO","cs.SE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-08-02T02:27:50Z","title_canon_sha256":"4673a476e1fa50db7ca8284c739f005f6a5212933498fac1ee18cf381ce22472"},"schema_version":"1.0","source":{"id":"1108.0471","kind":"arxiv","version":1}},"canonical_sha256":"0d2bd19611cbb160730a566d32c1fd48e72a1fffb0ee83083d1f39f52cc24ee2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d2bd19611cbb160730a566d32c1fd48e72a1fffb0ee83083d1f39f52cc24ee2","first_computed_at":"2026-05-18T04:16:30.312681Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:16:30.312681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TbYltq1tPw6PfTU3Zyvc4K6ImTlm5kResN6FlK8hYH801k+4+HZfgbLEbxVnkY4u5YC6YRndn+D3NK85RyLwDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:16:30.313257Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.0471","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ddffb6405bf8470830458a144000154b6c13e3447b48903227524ce6305a219","sha256:0cc271bb9e5f7cfacf699b2c353b666d82510cbed94bffd579cab88ea91d9e50"],"state_sha256":"6ff961bba5a0f161618d01ccca876145e1ddc6dc41d3886ef72258f1f8f038ed"}