PranaNet
AQI 313
← bkc-02b.prananet.eth
← #24

Reading #27

0Good

bkc-02b.prananet.eth · cell te7u6n · 6/11/2026, 19:13:00 IST

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

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1cd0ef27df17fe6c99b2d68eac0a8a132e3144a50e296d35f2af4777596d5988
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 19:14:11 IST (3 days after the reading)
Queryable attributes
device = 0xaaf237263e4b6aa36a5db967f1dedeea2617f2eaens = bkc-02b.prananet.ethgeohash = te7u6nepoch = 1793972580nonce = 27pm25_x10 = 0pm10_x10 = 0simulated = false
Query that finds this record
from("prananet.reading").where(device = 0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea && nonce = 27).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
    1deviceaddress200xaaf237263e4b6aa36a5db967f1dedeea2617f2ea0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea
    2epochuint2563217939725800x000000000000000000000000000000000000000000000000000000006aedd964
    3pm25_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    4pm10_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint25632270x000000000000000000000000000000000000000000000000000000000000001b
    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 0xf8162fe5d3b80ed1084bd33bb15b59bc71a4a4e46e91aab80904107492f71538
    s 0x41e3c9465f53a34989517ce160497566329af48c7c7e108db3826ce107a45209
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 27 follows #24, so this reading can't be replayed.
  6. ✕
    Step 6

    Cross-checked against neighbours

    Flagged by the verifier: 0.0 µg/m³ against a neighbour median of 35.7 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": "0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea",
  "ens": "bkc-02b.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793972580,
  "pm25_x10": 0,
  "pm10_x10": 0,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 27,
  "signature": "0xf8162fe5d3b80ed1084bd33bb15b59bc71a4a4e46e91aab80904107492f7153841e3c9465f53a34989517ce160497566329af48c7c7e108db3826ce107a452091b",
  "simulated": false
}