PranaNet
AQI 39
← bkc-sim-04.sim.prananet.eth
← #6289#6291 →

Reading #6290

69Satisfactory

bkc-sim-04.sim.prananet.eth · cell te7u3y · 11/11/2026, 04:41:00 IST · simulated device

PM2.5
38.4 µg/m³
PM10
69.4 µg/m³
Temperature
29.7 °C
Humidity
65.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x8e5b5040791703a1a3da4eed8510d8021f31055b127fcc956460262c6167857b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
14/11/2026, 04:43:31 IST (3 days after the reading)
Queryable attributes
device = 0x35025af20ff45df8ac04d45f8b91ff1baa61e5a5ens = bkc-sim-04.sim.prananet.ethgeohash = te7u3yepoch = 1794352260nonce = 6290pm25_x10 = 384pm10_x10 = 694simulated = true
Query that finds this record
from("prananet.reading").where(device = 0x35025af20ff45df8ac04d45f8b91ff1baa61e5a5 && nonce = 6290).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
    1deviceaddress200x35025af20ff45df8ac04d45f8b91ff1baa61e5a50x35025af20ff45df8ac04d45f8b91ff1baa61e5a5
    2epochuint2563217943522600x000000000000000000000000000000000000000000000000000000006af3a484
    3pm25_x10uint256323840x0000000000000000000000000000000000000000000000000000000000000180
    4pm10_x10uint256326940x00000000000000000000000000000000000000000000000000000000000002b6
    5temp_x10int256322970x0000000000000000000000000000000000000000000000000000000000000129
    6hum_x10uint256326580x0000000000000000000000000000000000000000000000000000000000000292
    7nonceuint2563262900x0000000000000000000000000000000000000000000000000000000000001892
    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 0x35025af20ff45df8ac04d45f8b91ff1baa61e5a5
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 6290 follows #6289, 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": "0x35025af20ff45df8ac04d45f8b91ff1baa61e5a5",
  "ens": "bkc-sim-04.sim.prananet.eth",
  "geohash": "te7u3y",
  "epoch": 1794352260,
  "pm25_x10": 384,
  "pm10_x10": 694,
  "temp_x10": 297,
  "hum_x10": 658,
  "nonce": 6290,
  "signature": "0x",
  "simulated": true
}