PranaNet
AQI 309
← bkc-sim-01.sim.prananet.eth
← #504#506 →

Reading #505

239Poor

bkc-sim-01.sim.prananet.eth · cell te7u6n · 7/11/2026, 03:06:00 IST · simulated device

PM2.5
101.7 µg/m³
PM10
179.5 µg/m³
Temperature
28.3 °C
Humidity
64.3 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x66c3c10490dda20e46b14bbbeed70136b18c39e79165adffa664bd1f93fddb49
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:07:35 IST (3 days after the reading)
Queryable attributes
device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6ens = bkc-sim-01.sim.prananet.ethgeohash = te7u6nepoch = 1794000960nonce = 505pm25_x10 = 1017pm10_x10 = 1795simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 && nonce = 505).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
    2epochuint2563217940009600x000000000000000000000000000000000000000000000000000000006aee4840
    3pm25_x10uint2563210170x00000000000000000000000000000000000000000000000000000000000003f9
    4pm10_x10uint2563217950x0000000000000000000000000000000000000000000000000000000000000703
    5temp_x10int256322830x000000000000000000000000000000000000000000000000000000000000011b
    6hum_x10uint256326430x0000000000000000000000000000000000000000000000000000000000000283
    7nonceuint256325050x00000000000000000000000000000000000000000000000000000000000001f9
    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 505 follows #504, 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": 1794000960,
  "pm25_x10": 1017,
  "pm10_x10": 1795,
  "temp_x10": 283,
  "hum_x10": 643,
  "nonce": 505,
  "signature": "0x",
  "simulated": true
}