PranaNet
AQI 146
← bkc-sim-01.sim.prananet.eth
← #476#478 →

Reading #477

252Poor

bkc-sim-01.sim.prananet.eth · cell te7u6n · 7/11/2026, 02:37:00 IST · simulated device

PM2.5
105.5 µg/m³
PM10
196.7 µg/m³
Temperature
29.8 °C
Humidity
66.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x2eecf636a8e5617509d997e046fbb310dd79fb720496993f2ba3496bd2e18e8b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:38:37 IST (3 days after the reading)
Queryable attributes
device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6ens = bkc-sim-01.sim.prananet.ethgeohash = te7u6nepoch = 1793999220nonce = 477pm25_x10 = 1055pm10_x10 = 1967simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 && nonce = 477).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
    2epochuint2563217939992200x000000000000000000000000000000000000000000000000000000006aee4174
    3pm25_x10uint2563210550x000000000000000000000000000000000000000000000000000000000000041f
    4pm10_x10uint2563219670x00000000000000000000000000000000000000000000000000000000000007af
    5temp_x10int256322980x000000000000000000000000000000000000000000000000000000000000012a
    6hum_x10uint256326650x0000000000000000000000000000000000000000000000000000000000000299
    7nonceuint256324770x00000000000000000000000000000000000000000000000000000000000001dd
    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 477 follows #476, 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": 1793999220,
  "pm25_x10": 1055,
  "pm10_x10": 1967,
  "temp_x10": 298,
  "hum_x10": 665,
  "nonce": 477,
  "signature": "0x",
  "simulated": true
}