PranaNet
AQI 81
← bkc-01.prananet.eth
← #316#318 →

Reading #317

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:37:00 IST

PM2.5
87.2 µg/m³
PM10
87.2 µg/m³
Temperature
22.7 °C
Humidity
52.7 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xf360d15a6ba7d6f97fa72d053abcdd11774b379485227f1cdeca9ee10f48e34a
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:38:10 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793992020nonce = 317pm25_x10 = 872pm10_x10 = 872simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 317).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
    2epochuint2563217939920200x000000000000000000000000000000000000000000000000000000006aee2554
    3pm25_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    4pm10_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    5temp_x10int256322270x00000000000000000000000000000000000000000000000000000000000000e3
    6hum_x10uint256325270x000000000000000000000000000000000000000000000000000000000000020f
    7nonceuint256323170x000000000000000000000000000000000000000000000000000000000000013d
    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 0x591f6c72022e895f2e3bfe356f7824b7c2d6bb9d1430e469e9de233c7b96bd10
    s 0x72d98c800f6102a88248dcd807101b4d5362b52919f37c64403ec3d8ee5357cb
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 317 follows #316, 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": 1793992020,
  "pm25_x10": 872,
  "pm10_x10": 872,
  "temp_x10": 227,
  "hum_x10": 527,
  "nonce": 317,
  "signature": "0x591f6c72022e895f2e3bfe356f7824b7c2d6bb9d1430e469e9de233c7b96bd1072d98c800f6102a88248dcd807101b4d5362b52919f37c64403ec3d8ee5357cb1b",
  "simulated": false
}