PranaNet
AQI 500
← bkc-sim-03.sim.prananet.eth
← #539#541 →

Reading #540

122Moderate

bkc-sim-03.sim.prananet.eth · cell te7u6p · 7/11/2026, 03:42:00 IST · simulated device

PM2.5
66.6 µg/m³
PM10
129.0 µg/m³
Temperature
28.2 °C
Humidity
65.6 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xc9c1c4e3dbab229e9e8e7215e2f5de9cb102dc0ef32da06073524dae6edbab5e
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:44:19 IST (3 days after the reading)
Queryable attributes
device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7ens = bkc-sim-03.sim.prananet.ethgeohash = te7u6pepoch = 1794003120nonce = 540pm25_x10 = 666pm10_x10 = 1290simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7 && nonce = 540).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
    2epochuint2563217940031200x000000000000000000000000000000000000000000000000000000006aee50b0
    3pm25_x10uint256326660x000000000000000000000000000000000000000000000000000000000000029a
    4pm10_x10uint2563212900x000000000000000000000000000000000000000000000000000000000000050a
    5temp_x10int256322820x000000000000000000000000000000000000000000000000000000000000011a
    6hum_x10uint256326560x0000000000000000000000000000000000000000000000000000000000000290
    7nonceuint256325400x000000000000000000000000000000000000000000000000000000000000021c
    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 540 follows #539, 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": 1794003120,
  "pm25_x10": 666,
  "pm10_x10": 1290,
  "temp_x10": 282,
  "hum_x10": 656,
  "nonce": 540,
  "signature": "0x",
  "simulated": true
}