PranaNet
AQI 308
← bkc-02.prananet.eth
← #91#106 →

Reading #104

500Severe

bkc-02.prananet.eth · cell te7u6n · 6/11/2026, 18:27:00 IST

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

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x7eb39a6dbdf6865c80ca278ba11eeb7569f8473f62d09ab0c9a5660485f18471
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 18:28:12 IST (3 days after the reading)
Queryable attributes
device = 0x0b715555721a00cce73e03efb239db39a5e313b2ens = bkc-02.prananet.ethgeohash = te7u6nepoch = 1793969820nonce = 104pm25_x10 = 9039pm10_x10 = 9039simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x0b715555721a00cce73e03efb239db39a5e313b2 && nonce = 104).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
    2epochuint2563217939698200x000000000000000000000000000000000000000000000000000000006aedce9c
    3pm25_x10uint2563290390x000000000000000000000000000000000000000000000000000000000000234f
    4pm10_x10uint2563290390x000000000000000000000000000000000000000000000000000000000000234f
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint256321040x0000000000000000000000000000000000000000000000000000000000000068
    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 0x8061a50a81d267b2715f1c108a573f30973fb139ae47e166acb583abf542227b
    s 0x44897100c47ed606b02723b5f931fc93c23cbdcb23e3eb2f24fd8539716e5e2d
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x0b715555721a00cce73e03efb239db39a5e313b2
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 104 follows #91, so this reading can't be replayed.
  6. ✕
    Step 6

    Cross-checked against neighbours

    Flagged by the verifier: 903.9 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": 1793969820,
  "pm25_x10": 9039,
  "pm10_x10": 9039,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 104,
  "signature": "0x8061a50a81d267b2715f1c108a573f30973fb139ae47e166acb583abf542227b44897100c47ed606b02723b5f931fc93c23cbdcb23e3eb2f24fd8539716e5e2d1c",
  "simulated": false
}