PranaNet
AQI 309
← bkc-sim-03.sim.prananet.eth
← #489#491 →

Reading #490

260Poor

bkc-sim-03.sim.prananet.eth · cell te7u6p · 7/11/2026, 02:50:00 IST · simulated device

PM2.5
108.1 µg/m³
PM10
196.4 µg/m³
Temperature
29.7 °C
Humidity
63.6 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x66eacbe6f33dc7a874be82edbe5d5ed6ce7a6edf2ae0fd4834badf267e9c2f23
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:51:46 IST (3 days after the reading)
Queryable attributes
device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7ens = bkc-sim-03.sim.prananet.ethgeohash = te7u6pepoch = 1794000000nonce = 490pm25_x10 = 1081pm10_x10 = 1964simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7 && nonce = 490).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
    2epochuint2563217940000000x000000000000000000000000000000000000000000000000000000006aee4480
    3pm25_x10uint2563210810x0000000000000000000000000000000000000000000000000000000000000439
    4pm10_x10uint2563219640x00000000000000000000000000000000000000000000000000000000000007ac
    5temp_x10int256322970x0000000000000000000000000000000000000000000000000000000000000129
    6hum_x10uint256326360x000000000000000000000000000000000000000000000000000000000000027c
    7nonceuint256324900x00000000000000000000000000000000000000000000000000000000000001ea
    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 490 follows #489, 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": 1794000000,
  "pm25_x10": 1081,
  "pm10_x10": 1964,
  "temp_x10": 297,
  "hum_x10": 636,
  "nonce": 490,
  "signature": "0x",
  "simulated": true
}