PranaNet
AQI 309
← bkc-sim-03.sim.prananet.eth
← #496#498 →

Reading #497

265Poor

bkc-sim-03.sim.prananet.eth · cell te7u6p · 7/11/2026, 02:58:00 IST · simulated device

PM2.5
109.6 µg/m³
PM10
198.2 µg/m³
Temperature
29.5 °C
Humidity
63.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x2617f7f1601b9b070092ef6a72087d60cd59976419d6e60c9b9c70555fb54f8a
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:59:44 IST (3 days after the reading)
Queryable attributes
device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7ens = bkc-sim-03.sim.prananet.ethgeohash = te7u6pepoch = 1794000480nonce = 497pm25_x10 = 1096pm10_x10 = 1982simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7 && nonce = 497).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
    1deviceaddress200xd9c632585a2a926bbcecb64241d9cc0ea0d5efd70xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7
    2epochuint2563217940004800x000000000000000000000000000000000000000000000000000000006aee4660
    3pm25_x10uint2563210960x0000000000000000000000000000000000000000000000000000000000000448
    4pm10_x10uint2563219820x00000000000000000000000000000000000000000000000000000000000007be
    5temp_x10int256322950x0000000000000000000000000000000000000000000000000000000000000127
    6hum_x10uint256326300x0000000000000000000000000000000000000000000000000000000000000276
    7nonceuint256324970x00000000000000000000000000000000000000000000000000000000000001f1
    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 0x
    s 0x
    v NaN
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 497 follows #496, 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": "0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7",
  "ens": "bkc-sim-03.sim.prananet.eth",
  "geohash": "te7u6p",
  "epoch": 1794000480,
  "pm25_x10": 1096,
  "pm10_x10": 1982,
  "temp_x10": 295,
  "hum_x10": 630,
  "nonce": 497,
  "signature": "0x",
  "simulated": true
}