PranaNet
AQI 67
← bkc-01.prananet.eth
← #282#284 →

Reading #283

192Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:03:00 IST

PM2.5
87.5 µg/m³
PM10
87.5 µg/m³
Temperature
22.3 °C
Humidity
59.3 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x02da34ae3998f16b5f997b51a3ffc440e4a18e1794404f0c1817f6baf9d689a1
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:04:39 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793989980nonce = 283pm25_x10 = 875pm10_x10 = 875simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 283).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
    2epochuint2563217939899800x000000000000000000000000000000000000000000000000000000006aee1d5c
    3pm25_x10uint256328750x000000000000000000000000000000000000000000000000000000000000036b
    4pm10_x10uint256328750x000000000000000000000000000000000000000000000000000000000000036b
    5temp_x10int256322230x00000000000000000000000000000000000000000000000000000000000000df
    6hum_x10uint256325930x0000000000000000000000000000000000000000000000000000000000000251
    7nonceuint256322830x000000000000000000000000000000000000000000000000000000000000011b
    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 0x6d3f9e9b087703fee5b846d345bdce620325cc3be9d8fd56b613238f15d0eeea
    s 0x0d22f0d750f7401196127c4d54270f6a0207a8b80c50b6740cdf8c8cb17ec4d0
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 283 follows #282, 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": 1793989980,
  "pm25_x10": 875,
  "pm10_x10": 875,
  "temp_x10": 223,
  "hum_x10": 593,
  "nonce": 283,
  "signature": "0x6d3f9e9b087703fee5b846d345bdce620325cc3be9d8fd56b613238f15d0eeea0d22f0d750f7401196127c4d54270f6a0207a8b80c50b6740cdf8c8cb17ec4d01c",
  "simulated": false
}