PranaNet
AQI 92
← bkc-02c.prananet.eth
← #186#188 →

Reading #187

190Moderate

bkc-02c.prananet.eth · cell te7u6n · 7/11/2026, 03:22:00 IST

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

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x33386a724209fc089c50201efb9f552520ef5ea50e486cd0ead646fa00c50d63
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:23:16 IST (3 days after the reading)
Queryable attributes
device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1ens = bkc-02c.prananet.ethgeohash = te7u6nepoch = 1794001920nonce = 187pm25_x10 = 870pm10_x10 = 870simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 && nonce = 187).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
    2epochuint2563217940019200x000000000000000000000000000000000000000000000000000000006aee4c00
    3pm25_x10uint256328700x0000000000000000000000000000000000000000000000000000000000000366
    4pm10_x10uint256328700x0000000000000000000000000000000000000000000000000000000000000366
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint256321870x00000000000000000000000000000000000000000000000000000000000000bb
    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 0xc2d2c4310efa6d87158a15fa90bb81966c93dd1858eb8c4f9f0174e974999847
    s 0x23d1ecda48c22f285e33669116466fd194d5ffe2de0f27e4325f52c832be5987
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 187 follows #186, 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": 1794001920,
  "pm25_x10": 870,
  "pm10_x10": 870,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 187,
  "signature": "0xc2d2c4310efa6d87158a15fa90bb81966c93dd1858eb8c4f9f0174e97499984723d1ecda48c22f285e33669116466fd194d5ffe2de0f27e4325f52c832be59871c",
  "simulated": false
}