PranaNet
AQI 333
← bkc-01.prananet.eth
← #335#337 →

Reading #336

190Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:56:00 IST

PM2.5
87.1 µg/m³
PM10
87.1 µg/m³
Temperature
23.7 °C
Humidity
52.7 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xb53c668c70b666c45371e75b8ea8d8a5d9066fe9c38d7bfc99fcc5876800acb0
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:57:06 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993160nonce = 336pm25_x10 = 871pm10_x10 = 871simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 336).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
    1deviceaddress200x4379c30ae56431f0485731f6e730ee0084e955c00x4379c30ae56431f0485731f6e730ee0084e955c0
    2epochuint2563217939931600x000000000000000000000000000000000000000000000000000000006aee29c8
    3pm25_x10uint256328710x0000000000000000000000000000000000000000000000000000000000000367
    4pm10_x10uint256328710x0000000000000000000000000000000000000000000000000000000000000367
    5temp_x10int256322370x00000000000000000000000000000000000000000000000000000000000000ed
    6hum_x10uint256325270x000000000000000000000000000000000000000000000000000000000000020f
    7nonceuint256323360x0000000000000000000000000000000000000000000000000000000000000150
    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 0xddb86f447b256fff111f2d30e5820606b129ac0872b4a697b81cb86ab256ac10
    s 0x2d3f9850ea74b070e1646b78743620fa7ff6946eb632f2ca328813f764afb42f
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 336 follows #335, 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": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
  "ens": "bkc-01.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793993160,
  "pm25_x10": 871,
  "pm10_x10": 871,
  "temp_x10": 237,
  "hum_x10": 527,
  "nonce": 336,
  "signature": "0xddb86f447b256fff111f2d30e5820606b129ac0872b4a697b81cb86ab256ac102d3f9850ea74b070e1646b78743620fa7ff6946eb632f2ca328813f764afb42f1b",
  "simulated": false
}