PranaNet
AQI 137
← bkc-sim-03.sim.prananet.eth
← #448#450 →

Reading #449

310Very Poor

bkc-sim-03.sim.prananet.eth · cell te7u6p · 7/11/2026, 02:09:00 IST · simulated device

PM2.5
132.9 µg/m³
PM10
253.4 µg/m³
Temperature
28.7 °C
Humidity
65.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xe0e8a44946913401c0559f8e433af7c57f1910508b75c6596368a7f33bfa1696
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:11:00 IST (3 days after the reading)
Queryable attributes
device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7ens = bkc-sim-03.sim.prananet.ethgeohash = te7u6pepoch = 1793997540nonce = 449pm25_x10 = 1329pm10_x10 = 2534simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7 && nonce = 449).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
    2epochuint2563217939975400x000000000000000000000000000000000000000000000000000000006aee3ae4
    3pm25_x10uint2563213290x0000000000000000000000000000000000000000000000000000000000000531
    4pm10_x10uint2563225340x00000000000000000000000000000000000000000000000000000000000009e6
    5temp_x10int256322870x000000000000000000000000000000000000000000000000000000000000011f
    6hum_x10uint256326540x000000000000000000000000000000000000000000000000000000000000028e
    7nonceuint256324490x00000000000000000000000000000000000000000000000000000000000001c1
    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 449 follows #448, 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": 1793997540,
  "pm25_x10": 1329,
  "pm10_x10": 2534,
  "temp_x10": 287,
  "hum_x10": 654,
  "nonce": 449,
  "signature": "0x",
  "simulated": true
}