PranaNet
AQI 49
← bkc-01.prananet.eth
← #419#422 →

Reading #420

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:19:00 IST

PM2.5
88.0 µg/m³
PM10
88.0 µg/m³
Temperature
22.9 °C
Humidity
60.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x3c1d5a33718f2d6e228e4cdedb6c68a95220fc25fe63113eb22140db4e283899
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:20:11 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793998140nonce = 420pm25_x10 = 880pm10_x10 = 880simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 420).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
    2epochuint2563217939981400x000000000000000000000000000000000000000000000000000000006aee3d3c
    3pm25_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    4pm10_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    5temp_x10int256322290x00000000000000000000000000000000000000000000000000000000000000e5
    6hum_x10uint256326040x000000000000000000000000000000000000000000000000000000000000025c
    7nonceuint256324200x00000000000000000000000000000000000000000000000000000000000001a4
    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 0x39a12fcc9555f58ba3b295030ff30cc31060ef1b35bbf77004a5c2a9a93278a5
    s 0x57a2c1ef52df7d0f953aa719502d91de19c15f87a36b693d631c022fd800d561
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 420 follows #419, 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": 1793998140,
  "pm25_x10": 880,
  "pm10_x10": 880,
  "temp_x10": 229,
  "hum_x10": 604,
  "nonce": 420,
  "signature": "0x39a12fcc9555f58ba3b295030ff30cc31060ef1b35bbf77004a5c2a9a93278a557a2c1ef52df7d0f953aa719502d91de19c15f87a36b693d631c022fd800d5611b",
  "simulated": false
}