PranaNet
AQI 160
← bkc-02c.prananet.eth
← #175#179 →

Reading #177

192Moderate

bkc-02c.prananet.eth · cell te7u6n · 7/11/2026, 03:12:00 IST

PM2.5
87.6 µg/m³
PM10
87.6 µg/m³
Temperature
not measured
Humidity
not measured

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x8abd815a75fb7418cd42e774a25d0247847d6e4f9a5ff872061725da6afec6c6
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:13:10 IST (3 days after the reading)
Queryable attributes
device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1ens = bkc-02c.prananet.ethgeohash = te7u6nepoch = 1794001320nonce = 177pm25_x10 = 876pm10_x10 = 876simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 && nonce = 177).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
    1deviceaddress200x11d415367d2d3440e5beea30a18ef0fdeb0638d10x11d415367d2d3440e5beea30a18ef0fdeb0638d1
    2epochuint2563217940013200x000000000000000000000000000000000000000000000000000000006aee49a8
    3pm25_x10uint256328760x000000000000000000000000000000000000000000000000000000000000036c
    4pm10_x10uint256328760x000000000000000000000000000000000000000000000000000000000000036c
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint256321770x00000000000000000000000000000000000000000000000000000000000000b1
    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 0xa5c89886349b312691c6f9c7095f32220341a68280f2a78bfd092c2ca719827c
    s 0x350ee21b4a2aca060d8699b08bd716f3faddbc671b709b3380ebd1681ee1ae18
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 177 follows #175, 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": "0x11d415367d2d3440e5beea30a18ef0fdeb0638d1",
  "ens": "bkc-02c.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794001320,
  "pm25_x10": 876,
  "pm10_x10": 876,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 177,
  "signature": "0xa5c89886349b312691c6f9c7095f32220341a68280f2a78bfd092c2ca719827c350ee21b4a2aca060d8699b08bd716f3faddbc671b709b3380ebd1681ee1ae181b",
  "simulated": false
}