PranaNet
AQI 104
← bkc-01.prananet.eth
← #508#510 →

Reading #509

199Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:48:00 IST

PM2.5
89.7 µg/m³
PM10
89.7 µg/m³
Temperature
22.6 °C
Humidity
69.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xbae6725ebf62ed0db667c9bc2a03e458308ad0246d3be84c40150a2b7e11b26b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:49:34 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003480nonce = 509pm25_x10 = 897pm10_x10 = 897simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 509).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
    2epochuint2563217940034800x000000000000000000000000000000000000000000000000000000006aee5218
    3pm25_x10uint256328970x0000000000000000000000000000000000000000000000000000000000000381
    4pm10_x10uint256328970x0000000000000000000000000000000000000000000000000000000000000381
    5temp_x10int256322260x00000000000000000000000000000000000000000000000000000000000000e2
    6hum_x10uint256326920x00000000000000000000000000000000000000000000000000000000000002b4
    7nonceuint256325090x00000000000000000000000000000000000000000000000000000000000001fd
    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 0xa156b8071721cfae2b0e4db0d559d268c6aa2cfb1571a968bce398ec377a96a1
    s 0x0ca36329f29c1ae1870d587f8379a4e73406e0c1ef13c6ae7ad9f1121a724bf3
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 509 follows #508, 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": 1794003480,
  "pm25_x10": 897,
  "pm10_x10": 897,
  "temp_x10": 226,
  "hum_x10": 692,
  "nonce": 509,
  "signature": "0xa156b8071721cfae2b0e4db0d559d268c6aa2cfb1571a968bce398ec377a96a10ca36329f29c1ae1870d587f8379a4e73406e0c1ef13c6ae7ad9f1121a724bf31b",
  "simulated": false
}