PranaNet
AQI 137
← bkc-01.prananet.eth
← #504#507 →

Reading #506

203Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:45:00 IST

PM2.5
90.9 µg/m³
PM10
90.9 µg/m³
Temperature
22.5 °C
Humidity
69.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1e18df30ce0cd71a4bc9114f4b033c67415f10268802e94879771a2f718bd375
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:46:22 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003300nonce = 506pm25_x10 = 909pm10_x10 = 909simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 506).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
    2epochuint2563217940033000x000000000000000000000000000000000000000000000000000000006aee5164
    3pm25_x10uint256329090x000000000000000000000000000000000000000000000000000000000000038d
    4pm10_x10uint256329090x000000000000000000000000000000000000000000000000000000000000038d
    5temp_x10int256322250x00000000000000000000000000000000000000000000000000000000000000e1
    6hum_x10uint256326950x00000000000000000000000000000000000000000000000000000000000002b7
    7nonceuint256325060x00000000000000000000000000000000000000000000000000000000000001fa
    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 0xb65f41b967818f28275d4b10ab964418049af3c7b64be3cb26a7e8d4eadc4967
    s 0x329301dc908974a6bb4a26f69c541e1f80a6b77139a5e6ba1eee8730f1e67e32
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 506 follows #504, so this reading can't be replayed.
  6. ✕
    Step 6

    Cross-checked against neighbours

    Flagged by the verifier: 90.9 µg/m³ against a neighbour median of 59.7 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": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
  "ens": "bkc-01.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794003300,
  "pm25_x10": 909,
  "pm10_x10": 909,
  "temp_x10": 225,
  "hum_x10": 695,
  "nonce": 506,
  "signature": "0xb65f41b967818f28275d4b10ab964418049af3c7b64be3cb26a7e8d4eadc4967329301dc908974a6bb4a26f69c541e1f80a6b77139a5e6ba1eee8730f1e67e321b",
  "simulated": false
}