PranaNet
AQI 80
← bkc-01.prananet.eth
← #311#314 →

Reading #313

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:33:00 IST

PM2.5
87.3 µg/m³
PM10
87.3 µg/m³
Temperature
22.5 °C
Humidity
52.6 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x707d8c927d0012a528fcf96877155c0c0a542583a07f33ccdaa5472c2e3ff7e8
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:34:15 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793991780nonce = 313pm25_x10 = 873pm10_x10 = 873simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 313).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
    2epochuint2563217939917800x000000000000000000000000000000000000000000000000000000006aee2464
    3pm25_x10uint256328730x0000000000000000000000000000000000000000000000000000000000000369
    4pm10_x10uint256328730x0000000000000000000000000000000000000000000000000000000000000369
    5temp_x10int256322250x00000000000000000000000000000000000000000000000000000000000000e1
    6hum_x10uint256325260x000000000000000000000000000000000000000000000000000000000000020e
    7nonceuint256323130x0000000000000000000000000000000000000000000000000000000000000139
    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 0x997f03b328a0cf2f32036d057dd3f621e1ed024671b521eaebb50b293c7ab8d5
    s 0x25e70c0af7c8e2079065b50fcb42c932a82972e8b56b70016988c928c901e8bf
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 313 follows #311, 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": 1793991780,
  "pm25_x10": 873,
  "pm10_x10": 873,
  "temp_x10": 225,
  "hum_x10": 526,
  "nonce": 313,
  "signature": "0x997f03b328a0cf2f32036d057dd3f621e1ed024671b521eaebb50b293c7ab8d525e70c0af7c8e2079065b50fcb42c932a82972e8b56b70016988c928c901e8bf1c",
  "simulated": false
}