PranaNet
AQI 311
← bkc-02.prananet.eth
← #90#104 →

Reading #91

500Severe

bkc-02.prananet.eth · cell te7u6n · 6/11/2026, 18:14:00 IST

PM2.5
580.9 µg/m³
PM10
580.9 µg/m³
Temperature
not measured
Humidity
not measured

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1366f307dac2fedde2db421f8d10675964452df14d9570e16669a00534a72b33
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 18:15:11 IST (3 days after the reading)
Queryable attributes
device = 0x0b715555721a00cce73e03efb239db39a5e313b2ens = bkc-02.prananet.ethgeohash = te7u6nepoch = 1793969040nonce = 91pm25_x10 = 5809pm10_x10 = 5809simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x0b715555721a00cce73e03efb239db39a5e313b2 && nonce = 91).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
    1deviceaddress200x0b715555721a00cce73e03efb239db39a5e313b20x0b715555721a00cce73e03efb239db39a5e313b2
    2epochuint2563217939690400x000000000000000000000000000000000000000000000000000000006aedcb90
    3pm25_x10uint2563258090x00000000000000000000000000000000000000000000000000000000000016b1
    4pm10_x10uint2563258090x00000000000000000000000000000000000000000000000000000000000016b1
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint25632910x000000000000000000000000000000000000000000000000000000000000005b
    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 0xdc1af4e515e7dd8cf911f975e73efd7400e4eb35659f8c50954a98d48e7a4761
    s 0x3f66e4692a2e71a349ed48bf90e8eb045ba6dafab16860ee2f7015af3d071dee
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x0b715555721a00cce73e03efb239db39a5e313b2
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 91 follows #90, so this reading can't be replayed.
  6. ✕
    Step 6

    Cross-checked against neighbours

    Flagged by the verifier: 580.9 µg/m³ against a neighbour median of 36.1 µg/m³ (neighbour outlier). The signature is genuine, but the value disagrees with its neighbours by more than 50% and 25 µg/m³. Flag tx ↗

Raw reading JSON
{
  "device": "0x0b715555721a00cce73e03efb239db39a5e313b2",
  "ens": "bkc-02.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793969040,
  "pm25_x10": 5809,
  "pm10_x10": 5809,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 91,
  "signature": "0xdc1af4e515e7dd8cf911f975e73efd7400e4eb35659f8c50954a98d48e7a47613f66e4692a2e71a349ed48bf90e8eb045ba6dafab16860ee2f7015af3d071dee1b",
  "simulated": false
}