PranaNet
AQI 170
← bkc-01.prananet.eth
← #338#342 →

Reading #339

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:59:00 IST

PM2.5
87.3 µg/m³
PM10
87.3 µg/m³
Temperature
23.8 °C
Humidity
52.7 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xd8a5e247891d5be6b7d3a66c838deae1d8c2eadbcb7247c0b9c896128b523deb
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:00:09 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993340nonce = 339pm25_x10 = 873pm10_x10 = 873simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 339).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
    2epochuint2563217939933400x000000000000000000000000000000000000000000000000000000006aee2a7c
    3pm25_x10uint256328730x0000000000000000000000000000000000000000000000000000000000000369
    4pm10_x10uint256328730x0000000000000000000000000000000000000000000000000000000000000369
    5temp_x10int256322380x00000000000000000000000000000000000000000000000000000000000000ee
    6hum_x10uint256325270x000000000000000000000000000000000000000000000000000000000000020f
    7nonceuint256323390x0000000000000000000000000000000000000000000000000000000000000153
    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 0xc847bef81c5aa157174aa045f0e867a8d3ade9eed8aa8df4cbd7a283d7d18a92
    s 0x0d9f858cae09bd5e1f64360050319952e79be4e9deae89b3beb3c1d8266e07bc
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 339 follows #338, 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": 1793993340,
  "pm25_x10": 873,
  "pm10_x10": 873,
  "temp_x10": 238,
  "hum_x10": 527,
  "nonce": 339,
  "signature": "0xc847bef81c5aa157174aa045f0e867a8d3ade9eed8aa8df4cbd7a283d7d18a920d9f858cae09bd5e1f64360050319952e79be4e9deae89b3beb3c1d8266e07bc1b",
  "simulated": false
}