PranaNet
AQI 89
← bkc-01.prananet.eth
← #308#311 →

Reading #309

192Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:29:00 IST

PM2.5
87.5 µg/m³
PM10
87.5 µg/m³
Temperature
21.7 °C
Humidity
51.3 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xb1188cb3e5a17e543720f7f059434346be621c1d6939e93013a03936e63d2801
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:30:18 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793991540nonce = 309pm25_x10 = 875pm10_x10 = 875simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 309).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
    2epochuint2563217939915400x000000000000000000000000000000000000000000000000000000006aee2374
    3pm25_x10uint256328750x000000000000000000000000000000000000000000000000000000000000036b
    4pm10_x10uint256328750x000000000000000000000000000000000000000000000000000000000000036b
    5temp_x10int256322170x00000000000000000000000000000000000000000000000000000000000000d9
    6hum_x10uint256325130x0000000000000000000000000000000000000000000000000000000000000201
    7nonceuint256323090x0000000000000000000000000000000000000000000000000000000000000135
    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 0x97141c85b20f62f362d5c2d1eeffec4ed44de2ce4532a429c6cef11cee3a14d6
    s 0x6be2f57c76c0aa4e95da64935985c7f81ef53ee1153ceb352f05dc7d46fcbe95
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 309 follows #308, 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": 1793991540,
  "pm25_x10": 875,
  "pm10_x10": 875,
  "temp_x10": 217,
  "hum_x10": 513,
  "nonce": 309,
  "signature": "0x97141c85b20f62f362d5c2d1eeffec4ed44de2ce4532a429c6cef11cee3a14d66be2f57c76c0aa4e95da64935985c7f81ef53ee1153ceb352f05dc7d46fcbe951b",
  "simulated": false
}