PranaNet
AQI 94
← bkc-01.prananet.eth
← #348#350 →

Reading #349

196Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:08:00 IST

PM2.5
88.8 µg/m³
PM10
88.8 µg/m³
Temperature
26.2 °C
Humidity
60.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x34f46a516caee990a08fc595b4860b7536d4b81bed1c0c8289e1051a3d0f2bf2
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:09:13 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993880nonce = 349pm25_x10 = 888pm10_x10 = 888simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 349).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
    2epochuint2563217939938800x000000000000000000000000000000000000000000000000000000006aee2c98
    3pm25_x10uint256328880x0000000000000000000000000000000000000000000000000000000000000378
    4pm10_x10uint256328880x0000000000000000000000000000000000000000000000000000000000000378
    5temp_x10int256322620x0000000000000000000000000000000000000000000000000000000000000106
    6hum_x10uint256326050x000000000000000000000000000000000000000000000000000000000000025d
    7nonceuint256323490x000000000000000000000000000000000000000000000000000000000000015d
    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 0x9a56f819dbfac3a3f7841372bdbdc3eb7b8255e7f9cd1e1be1dc238c84f63ae8
    s 0x0503ebc37c7416e6e62aaffcc7abbd850ffd46797399aae5e299063da8465ad6
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 349 follows #348, 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": 1793993880,
  "pm25_x10": 888,
  "pm10_x10": 888,
  "temp_x10": 262,
  "hum_x10": 605,
  "nonce": 349,
  "signature": "0x9a56f819dbfac3a3f7841372bdbdc3eb7b8255e7f9cd1e1be1dc238c84f63ae80503ebc37c7416e6e62aaffcc7abbd850ffd46797399aae5e299063da8465ad61c",
  "simulated": false
}