PranaNet
AQI 142
← bkc-sim-01.sim.prananet.eth
← #475#477 →

Reading #476

269Poor

bkc-sim-01.sim.prananet.eth · cell te7u6n · 7/11/2026, 02:36:00 IST · simulated device

PM2.5
110.6 µg/m³
PM10
205.8 µg/m³
Temperature
29.3 °C
Humidity
66.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xb2e09d8ec070c3f646b01ca264606ba0dfbb0f2fa8251f0cb795f37dc32f661b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:37:37 IST (3 days after the reading)
Queryable attributes
device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6ens = bkc-sim-01.sim.prananet.ethgeohash = te7u6nepoch = 1793999160nonce = 476pm25_x10 = 1106pm10_x10 = 2058simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 && nonce = 476).ownedBy(0x3a1f21f1c6f05efa35bb7178274b41c8873cca67)

Check it yourself

Your browser just repeated the check the Readings contract does on-chain. The relayer only pays gas: changing any value would break the signature.

  1. ✓
    Step 1

    Rebuild the 264-byte message

    #FieldTypeBytesValuePacked hex
    1deviceaddress200xe8cd0141e98eee436fdbd4bd6e2a11914182b2a60xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6
    2epochuint2563217939991600x000000000000000000000000000000000000000000000000000000006aee4138
    3pm25_x10uint2563211060x0000000000000000000000000000000000000000000000000000000000000452
    4pm10_x10uint2563220580x000000000000000000000000000000000000000000000000000000000000080a
    5temp_x10int256322930x0000000000000000000000000000000000000000000000000000000000000125
    6hum_x10uint256326620x0000000000000000000000000000000000000000000000000000000000000296
    7nonceuint256324760x00000000000000000000000000000000000000000000000000000000000001dc
    8chainIduint25632111551110x0000000000000000000000000000000000000000000000000000000000aa36a7
    9readingsContractaddress200x9192Fc053e1493EB2B7355192aa3F8e57AAE01d80x9192fc053e1493eb2b7355192aa3f8e57aae01d8

    abi.encodePacked, no padding between fields. chainId and contract stop replay on other chains. Total: 264 bytes.

  2. …
    Step 2

    Hash it with keccak256

    …
  3. …
    Step 3

    Recover the signer from the EIP-191 signature

    r 0x
    s 0x
    v NaN
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 476 follows #475, so this reading can't be replayed.
  6. ✓
    Step 6

    Cross-checked against neighbours

    Not flagged. The value agrees with neighbouring devices within the verifier's threshold.

Raw reading JSON
{
  "device": "0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6",
  "ens": "bkc-sim-01.sim.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793999160,
  "pm25_x10": 1106,
  "pm10_x10": 2058,
  "temp_x10": 293,
  "hum_x10": 662,
  "nonce": 476,
  "signature": "0x",
  "simulated": true
}