PranaNet
AQI 328
← bkc-01.prananet.eth
← #463#466 →

Reading #464

193Moderate

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

PM2.5
87.8 µg/m³
PM10
87.8 µg/m³
Temperature
21.8 °C
Humidity
72.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xd9200d9674f3716f71153c71fe6d1ac6be8397eac90a7607f96be9e11388dffb
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:04:09 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794000780nonce = 464pm25_x10 = 878pm10_x10 = 878simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 464).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
    2epochuint2563217940007800x000000000000000000000000000000000000000000000000000000006aee478c
    3pm25_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    4pm10_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    5temp_x10int256322180x00000000000000000000000000000000000000000000000000000000000000da
    6hum_x10uint256327220x00000000000000000000000000000000000000000000000000000000000002d2
    7nonceuint256324640x00000000000000000000000000000000000000000000000000000000000001d0
    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 0x8cfaaa4d107b9dcd0db7b71f98c13b565f057ec4df3f39eeeab2415b87734fe3
    s 0x1901c3ef90b977e145a639ae4020780b046e31069a2b4bcaebe8a6d84f62c1b5
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 464 follows #463, 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": 1794000780,
  "pm25_x10": 878,
  "pm10_x10": 878,
  "temp_x10": 218,
  "hum_x10": 722,
  "nonce": 464,
  "signature": "0x8cfaaa4d107b9dcd0db7b71f98c13b565f057ec4df3f39eeeab2415b87734fe31901c3ef90b977e145a639ae4020780b046e31069a2b4bcaebe8a6d84f62c1b51c",
  "simulated": false
}