PranaNet
AQI 27
← bkc-01.prananet.eth
← #337#339 →

Reading #338

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:58:00 IST

PM2.5
87.2 µg/m³
PM10
87.2 µg/m³
Temperature
23.8 °C
Humidity
52.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1d09b81ed92220ebf58dc1894d3d9faa039124bf0793194a502d9cc6e81a0b11
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:59:09 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993280nonce = 338pm25_x10 = 872pm10_x10 = 872simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 338).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
    2epochuint2563217939932800x000000000000000000000000000000000000000000000000000000006aee2a40
    3pm25_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    4pm10_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    5temp_x10int256322380x00000000000000000000000000000000000000000000000000000000000000ee
    6hum_x10uint256325280x0000000000000000000000000000000000000000000000000000000000000210
    7nonceuint256323380x0000000000000000000000000000000000000000000000000000000000000152
    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 0x277a5ad8a4f7fd094d5d14aa2d900bfd5d5a2a926dd703c7ceddd3d22a8790c1
    s 0x2a6850d7072b33e98009a2b7912e25382348c389cd476aa30215d6d03a45b453
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 338 follows #337, 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": 1793993280,
  "pm25_x10": 872,
  "pm10_x10": 872,
  "temp_x10": 238,
  "hum_x10": 528,
  "nonce": 338,
  "signature": "0x277a5ad8a4f7fd094d5d14aa2d900bfd5d5a2a926dd703c7ceddd3d22a8790c12a6850d7072b33e98009a2b7912e25382348c389cd476aa30215d6d03a45b4531c",
  "simulated": false
}