PranaNet
AQI 309
← bkc-sim-05.sim.prananet.eth
← #498#500 →

Reading #499

276Poor

bkc-sim-05.sim.prananet.eth · cell te7u6q · 7/11/2026, 03:00:00 IST · simulated device

PM2.5
112.9 µg/m³
PM10
199.2 µg/m³
Temperature
29.6 °C
Humidity
61.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x5e5de4dfc05d64cc0103cc8e9df23419f97b845bc9b8bb76036230423c12e4eb
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:01:57 IST (3 days after the reading)
Queryable attributes
device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397ens = bkc-sim-05.sim.prananet.ethgeohash = te7u6qepoch = 1794000600nonce = 499pm25_x10 = 1129pm10_x10 = 1992simulated = true
Query that finds this record
from("prananet.reading").where(device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397 && nonce = 499).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
    1deviceaddress200x6ba7ec7f9de29074c329cadb667a6f54124193970x6ba7ec7f9de29074c329cadb667a6f5412419397
    2epochuint2563217940006000x000000000000000000000000000000000000000000000000000000006aee46d8
    3pm25_x10uint2563211290x0000000000000000000000000000000000000000000000000000000000000469
    4pm10_x10uint2563219920x00000000000000000000000000000000000000000000000000000000000007c8
    5temp_x10int256322960x0000000000000000000000000000000000000000000000000000000000000128
    6hum_x10uint256326140x0000000000000000000000000000000000000000000000000000000000000266
    7nonceuint256324990x00000000000000000000000000000000000000000000000000000000000001f3
    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 0x6ba7ec7f9de29074c329cadb667a6f5412419397
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 499 follows #498, 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": "0x6ba7ec7f9de29074c329cadb667a6f5412419397",
  "ens": "bkc-sim-05.sim.prananet.eth",
  "geohash": "te7u6q",
  "epoch": 1794000600,
  "pm25_x10": 1129,
  "pm10_x10": 1992,
  "temp_x10": 296,
  "hum_x10": 614,
  "nonce": 499,
  "signature": "0x",
  "simulated": true
}