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    "expiration": "UNBOUND",
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     "identity_hash": "UNBOUND"
    },
    "issued_at": 1790467692.111,
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       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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      },
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       "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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       "timestamp": 1790467672.3184996,
       "view": 4
      },
      "cain-mr2-node-4": {
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       "view": 4
      }
     },
     "signer_set": [
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    "bundle_hash": "aa7bc3c191045780874f3213de188ed44ec6d7aae85634b864efac6346b9c532",
    "certificate_hash": "a2fc9da75d27f5f872adf43d81f733cca1c63bcfbc4a737fa4c15264968a8948",
    "certificate_type": "COMMIT_QC",
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    "quorum_policy": {
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     "rule": "ceil((N+f+1)/2)"
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    "signer_set": [
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   },
   "issuer_signature_b64": "h+5QEPYsCWCnXvfQd5WVGn2aIOnRUCTi0musoRjX+8YTXNZLTx4QoYmlnmsJu+qvQdh0TlIb21wj/gfE5nxlBA==",
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     "resource": "hl/hl000613-heal-atl-lax-1"
    },
    "request_id": "hl000613-heal-atl-lax-1"
   }
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 ],
 "bundle_type": "CAIN42/PBFT/QC-EVIDENCE/v1",
 "classification": "MEASURED on the live cluster cain-mr-02 (4 replicas on 4 hosts)",
 "cluster_id": "cain-mr-02",
 "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
 "generated_at": "2026-09-27T00:08:12Z",
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  "phases": [
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    "expected": "COMMIT",
    "phase": "host_atl_down",
    "primary_before": "cain-mr2-node-1",
    "primary_was_stopped": true,
    "requests": 6,
    "responses": [
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      "sequence": 2
     },
     {
      "decision": "ALLOW",
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      "sequence": 3
     },
     {
      "decision": "ALLOW",
      "request_id": "hl000613-atl-down-2",
      "sequence": 4
     },
     {
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     },
     {
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      "sequence": 6
     },
     {
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     }
    ],
    "result": "PASS",
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    ],
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   },
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    "responses": [
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     },
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     },
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     },
     {
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     },
     {
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     },
     {
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     }
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   },
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     },
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     },
     {
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     },
     {
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     },
     {
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     },
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     }
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     },
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     },
     {
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     },
     {
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     },
     {
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     },
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   },
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    },
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    "responses": [
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   }
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  "placement": {
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   "cain-mr2-node-2": "lax",
   "cain-mr2-node-3": "mia",
   "cain-mr2-node-4": "sjc"
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 },
 "membership": {
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  "domain": "CAIN42/PBFT/MEMBERSHIP/v1",
  "epoch": 1,
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   },
   {
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   },
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   },
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  "protocol": "PBFT/Castro-Liskov-1999+CAIN-Hardened",
  "quorum": 3,
  "view_change_join": 2,
  "watermark_window": 100
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         "msg_type": "COMMIT",
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         "timestamp": 1790467572.8824193,
         "view": 0
        },
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         "timestamp": 1790467572.87286,
         "view": 0
        },
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         "timestamp": 1790467572.9002817,
         "view": 0
        }
       },
       "signer_set": [
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      "certificate_type": "COMMIT_QC",
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      "view": 0
     },
     "prepare_qc": {
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       "aggregation_algorithm": "ed25519-individual",
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         "nonce": "e8bafb663a56412d9f386a5b0a39117b",
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          },
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        },
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        }
       },
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          },
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        }
       },
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           "timestamp": 1790467613.340633,
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           "timestamp": 1790467628.1304038,
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          }
         },
         "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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         "timestamp": 1790467628.135197,
         "view": 4
        },
        "cain-mr2-node-2": {
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           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790467628.1304038,
           "view": 4
          },
          "pre_prepare_digest": "bf2f41d09c6b72125626bda6f506be337ec3429947256eab884ba9b1f128f87d"
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          },
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        },
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        }
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        }
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        },
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           "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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          }
         },
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         "timestamp": 1790467592.8088317,
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        },
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         "timestamp": 1790467593.7559013,
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         "timestamp": 1790467594.1558454,
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        },
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        }
       },
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        }
       },
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        }
       },
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        },
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        }
       },
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     },
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          }
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       },
       "signer_set": [
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      },
      "leader_proposal_digest": "00616a45c8e05709cd74341fa85891c091f8e9f21d99b6d11178eed8dc7aeae9",
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     },
     "sequence": 32
    },
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        },
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         "view": 4
        },
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      "view": 4
     },
     "prepare_qc": {
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "sender_id": "cain-mr2-node-1",
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           "view": 4
          },
          "pre_prepare_digest": "8a044c871524b8662d1c3698cdbc8ff09ca89499cf473ae78f9b09acdc60f42a"
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         "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
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        },
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            "request_id": "hl000613-heal-atl-lax-1",
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           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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           "timestamp": 1790467672.124937,
           "view": 4
          },
          "pre_prepare_digest": "8a044c871524b8662d1c3698cdbc8ff09ca89499cf473ae78f9b09acdc60f42a"
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         "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
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         "sender_id": "cain-mr2-node-4",
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        }
       },
       "signer_set": [
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       "msg_type": "PRE_PREPARE",
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         },
         "resource": "hl/hl000613-heal-atl-lax-1"
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        "request_id": "hl000613-heal-atl-lax-1",
        "requested_authority": "standard"
       },
       "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
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       "sender_id": "cain-mr2-node-1",
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       "timestamp": 1790467672.124937,
       "view": 4
      },
      "leader_proposal_digest": "8a044c871524b8662d1c3698cdbc8ff09ca89499cf473ae78f9b09acdc60f42a",
      "parent_decision_hash": "52f9b52b706edb648afaef280a93b2fa03aa7e3c09d20128eb931465c76d01ca",
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      "quorum": 3,
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       "rule": "ceil((N+f+1)/2)"
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      "sequence": 33,
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      "view": 4
     },
     "sequence": 33
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   ],
   "commit_index": 33,
   "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
   "fast_commits": 0,
   "head_decision_hash": "42280746bd8050ea279c2edea855f0e5be8c5b99cba92a0b7cc5fc312fe8bdef",
   "membership_key_source": "CONFIGURED",
   "view": 4
  }
 },
 "not_claimed": [
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  "placement is operator-attested",
  "third-party review",
  "absence of bugs"
 ],
 "run_log": [
  {
   "event": "start: 4 replicas on 4 hosts converged at 1",
   "t": 1790467574.076
  },
  {
   "event": "stopped whole host(s) ['atl']: ['cain-mr2-node-1']",
   "t": 1790467575.955
  },
  {
   "event": "atl host down: 6/6 committed (primary was on it: view change) -> PASS",
   "t": 1790467580.924
  },
  {
   "event": "restarted ['atl']",
   "t": 1790467581.136
  },
  {
   "event": "all 4 replicas agree at 8",
   "t": 1790467587.804
  },
  {
   "event": "stopped whole host(s) ['lax']: ['cain-mr2-node-2']",
   "t": 1790467591.156
  },
  {
   "event": "lax host down: 6/6 committed (primary was on it: view change) -> PASS",
   "t": 1790467595.41
  },
  {
   "event": "restarted ['lax']",
   "t": 1790467596.414
  },
  {
   "event": "all 4 replicas agree at 16",
   "t": 1790467605.66
  },
  {
   "event": "stopped whole host(s) ['mia']: ['cain-mr2-node-3']",
   "t": 1790467607.736
  },
  {
   "event": "mia host down: 6/6 committed (primary was on it: view change) -> PASS",
   "t": 1790467611.741
  },
  {
   "event": "restarted ['mia']",
   "t": 1790467612.95
  },
  {
   "event": "all 4 replicas agree at 24",
   "t": 1790467621.189
  },
  {
   "event": "stopped whole host(s) ['sjc']: ['cain-mr2-node-4']",
   "t": 1790467625.949
  },
  {
   "event": "sjc host down: 6/6 committed (primary was on it: view change) -> PASS",
   "t": 1790467629.782
  },
  {
   "event": "restarted ['sjc']",
   "t": 1790467631.255
  },
  {
   "event": "all 4 replicas agree at 32",
   "t": 1790467639.867
  },
  {
   "event": "stopped whole host(s) ['atl', 'lax']: ['cain-mr2-node-1', 'cain-mr2-node-2']",
   "t": 1790467645.695
  },
  {
   "event": "two hosts down ['atl', 'lax']: 0/3 committed, heights unchanged -> PASS",
   "t": 1790467665.781
  },
  {
   "event": "restarted ['atl', 'lax']",
   "t": 1790467668.108
  },
  {
   "event": "all 4 replicas agree at 33",
   "t": 1790467677.217
  }
 ],
 "source_commitment": {
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  "git_commit": "521f84c0456bf118645722073f09df140167b16b",
  "image_id": "sha256:3fb3e6f9eb8770c5db09c98de62d854e89b1a806b88593de04380c553df27e7a",
  "note": "source is not published; the commit hash is a commitment"
 },
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      "nonce": "ba9ddc2fcc6f4020a7887f4da47faf42",
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            "resource": "hl/hl000613-mia-down-4"
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           "request_id": "hl000613-mia-down-4",
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          "timestamp": 1790467611.0131052,
          "view": 3
         },
         "prepares": {
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             "sequence": 24,
             "signature_b64": "ANo1ENYERpPl0gOAqokpcuzR0iNRFkSWriz3X2eBI2fN7p+AsOi8bacSmipQInTvqjmRUVyc/3yB5uxyhye9Aw==",
             "timestamp": 1790467617.0457945,
             "view": 3
            },
            "pre_prepare_digest": "9821d4711889860c64d4da491199b17ae6585c9fecc58d0fb9e8f9849306cd4a"
           },
           "public_key_b64": "8P4PCtI04O2rvGpeOufwkU1RJnPdjMjth+L/UcerxI4=",
           "request_digest": "5c23144903cb3bc8e69f04a43b7e260047c797d154f2a8e632c3e73684a5b0f1",
           "sender_id": "cain-mr2-node-1",
           "sequence": 24,
           "signature_b64": "bn2X1KzWwzhh1z4ZtF6CINURUrTVDsUERTch/vSr4trYDxTqyDp4eh7g89PQlCMR/8fix5+EJzTcUmtaz85SCg==",
           "timestamp": 1790467617.1130142,
           "view": 3
          },
          "cain-mr2-node-2": {
           "cluster_id": "cain-mr-02",
           "engine_version": "33.4-production-hardened",
           "epoch": 1,
           "msg_type": "PREPARE",
           "nonce": "7dc432e961464ba7a8ffcaba79a75c93",
           "payload": {
            "pre_prepare": {
             "cluster_id": "cain-mr-02",
             "engine_version": "33.4-production-hardened",
             "epoch": 1,
             "msg_type": "PRE_PREPARE",
             "nonce": "bc492fff8857421bafb73b61055ce65b",
             "payload": {
              "client_id": "host-loss-test",
              "operation": {
               "action": "write",
               "data": {
                "rid": "hl000613-heal-mia-2"
               },
               "resource": "hl/hl000613-heal-mia-2"
              },
              "request_id": "hl000613-heal-mia-2",
              "requested_authority": "standard"
             },
             "public_key_b64": "SqIx0XEixGU8RzpKPmVxA9P6k4udhRFeMx4CPTedc+o=",
             "request_digest": "5c23144903cb3bc8e69f04a43b7e260047c797d154f2a8e632c3e73684a5b0f1",
             "sender_id": "cain-mr2-node-4",
             "sequence": 24,
             "signature_b64": "ANo1ENYERpPl0gOAqokpcuzR0iNRFkSWriz3X2eBI2fN7p+AsOi8bacSmipQInTvqjmRUVyc/3yB5uxyhye9Aw==",
             "timestamp": 1790467617.0457945,
             "view": 3
            },
            "pre_prepare_digest": "9821d4711889860c64d4da491199b17ae6585c9fecc58d0fb9e8f9849306cd4a"
           },
           "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
           "request_digest": "5c23144903cb3bc8e69f04a43b7e260047c797d154f2a8e632c3e73684a5b0f1",
           "sender_id": "cain-mr2-node-2",
           "sequence": 24,
           "signature_b64": "sht5qAD6kYoS0c7xItigPgVjOMcY5SW6q/GeIp5IbKtGudx1dKVLd3SO/kSKUy4PEETW96y/gVJbcle8R92nCg==",
           "timestamp": 1790467617.0871444,
           "view": 3
          }
         },
         "request_digest": "5c23144903cb3bc8e69f04a43b7e260047c797d154f2a8e632c3e73684a5b0f1",
         "sequence": 24,
         "view": 3
        }
       },
       "reason": "PRIMARY_UNREACHABLE_CONFIRMED",
       "stable_checkpoint_seq": 24,
       "stable_state_root": "46a38fc9793f7bf400e4a3a3474f10ff108140a2ef5348681c79eca8b23d4e70"
      },
      "public_key_b64": "u3OhqYRLR2Rys0byPlSE1vHcjPWVSLt3j4XzMv2EwGs=",
      "request_digest": "54ee435bc0badc6430af14ba3a041fdb20d2009428d0231691b33e078efa6286",
      "sender_id": "cain-mr2-node-2",
      "sequence": 24,
      "signature_b64": "CqHFX5hCdXy/3PvHNr2rw675xnZQPK+TgxeLwEDfWCTIfcIm4X/IPjYEmWvELyd7FJ9kvCSeYWHx36jvu8YtBQ==",
      "timestamp": 1790467626.2889822,
      "view": 4
     },
     "cain-mr2-node-3": {
      "cluster_id": "cain-mr-02",
      "engine_version": "33.4-production-hardened",
      "epoch": 1,
      "msg_type": "VIEW_CHANGE",
      "nonce": "43e87b1d5f9b4cf69bd2e3d264bf547b",
      "payload": {
       "prepared_certificates": {},
       "reason": "PRIMARY_UNREACHABLE_CONFIRMED",
       "stable_checkpoint_seq": 24,
       "stable_state_root": "46a38fc9793f7bf400e4a3a3474f10ff108140a2ef5348681c79eca8b23d4e70"
      },
      "public_key_b64": "+x/1i4xlleDAdLt6vNaNfFaGVn8yo/N35Ax0mYAv2F8=",
      "request_digest": "44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a",
      "sender_id": "cain-mr2-node-3",
      "sequence": 24,
      "signature_b64": "NLpHsQw7ZLX8tDn4efyhCblXt8UtF/A7bZFIsPfAL3OcHHY9kMvj3YjWO4CEWpx4ilNm7+AhaOcOoPoEK+ZEDg==",
      "timestamp": 1790467626.2818809,
      "view": 4
     }
    },
    "signer_set": [
     "cain-mr2-node-1",
     "cain-mr2-node-2",
     "cain-mr2-node-3"
    ]
   },
   "bundle_hash": "301153fc9d607d089f5400b5453f79b7ce7108b541ee9bcb32c57ab7899f12f5",
   "certificate_hash": "04ed9bba706892b90c4e5d118259709753ad170a0ed04889a7dba041344d2a72",
   "certificate_type": "VIEW_CHANGE_QC",
   "cluster_id": "cain-mr-02",
   "configuration_hash": "9ad62c270187b9e16d2938370457ddc257cdf9849be61253f4319a5738387fd2",
   "decision_hash": "",
   "epoch": 1,
   "leader_proposal": null,
   "leader_proposal_digest": null,
   "parent_decision_hash": "",
   "proposal_digest": "",
   "quorum": 3,
   "quorum_policy": {
    "f": 1,
    "n": 4,
    "quorum": 3,
    "rule": "ceil((N+f+1)/2)"
   },
   "quorum_policy_hash": "13d05661a0b1d519909ca36ee4c21be59adc1384a0a7da6d906dc5248e86130c",
   "sequence": 0,
   "signer_set": [
    "cain-mr2-node-1",
    "cain-mr2-node-2",
    "cain-mr2-node-3"
   ],
   "view": 4
  }
 ],
 "what_this_is": "Every quorum certificate held by each replica of cain-mr-02 after each of its 4 hosts was taken down in turn (the cluster had to keep committing) and two hosts were taken down at once (it had to refuse). Identical decision chains on all replicas show there was no fork."
}