PranaNet
AQI 188
← bkc-sim-01.sim.prananet.eth
← #456#458 →

Reading #457

294Poor

bkc-sim-01.sim.prananet.eth · cell te7u6n · 7/11/2026, 02:17:00 IST · simulated device

PM2.5
118.2 µg/m³
PM10
225.0 µg/m³
Temperature
28.4 °C
Humidity
65.7 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xfb13fa1e53b184742bc127d33eaf5fc89d029ac874756eea25eaec5a7c4e681e
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:18:46 IST (3 days after the reading)
Queryable attributes
device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6ens = bkc-sim-01.sim.prananet.ethgeohash = te7u6nepoch = 1793998020nonce = 457pm25_x10 = 1182pm10_x10 = 2250simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 && nonce = 457).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
    1deviceaddress200xe8cd0141e98eee436fdbd4bd6e2a11914182b2a60xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6
    2epochuint2563217939980200x000000000000000000000000000000000000000000000000000000006aee3cc4
    3pm25_x10uint2563211820x000000000000000000000000000000000000000000000000000000000000049e
    4pm10_x10uint2563222500x00000000000000000000000000000000000000000000000000000000000008ca
    5temp_x10int256322840x000000000000000000000000000000000000000000000000000000000000011c
    6hum_x10uint256326570x0000000000000000000000000000000000000000000000000000000000000291
    7nonceuint256324570x00000000000000000000000000000000000000000000000000000000000001c9
    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 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 457 follows #456, 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": "0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6",
  "ens": "bkc-sim-01.sim.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793998020,
  "pm25_x10": 1182,
  "pm10_x10": 2250,
  "temp_x10": 284,
  "hum_x10": 657,
  "nonce": 457,
  "signature": "0x",
  "simulated": true
}