PranaNet
AQI 323
← bkc-sim-02.sim.prananet.eth
← #476#478 →

Reading #477

220Poor

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

PM2.5
96.1 µg/m³
PM10
185.6 µg/m³
Temperature
28.5 °C
Humidity
62.9 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xf40f29ddb91997bd62d1d16cdbc8aefeccd2c81395c1c844afae7979f0da838b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:38:42 IST (3 days after the reading)
Queryable attributes
device = 0x83161be053d4d23dc940dcfc94fcf0ba39582c44ens = bkc-sim-02.sim.prananet.ethgeohash = te7u6nepoch = 1793999220nonce = 477pm25_x10 = 961pm10_x10 = 1856simulated = true
Query that finds this record
from("prananet.reading").where(device = 0x83161be053d4d23dc940dcfc94fcf0ba39582c44 && 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
    1deviceaddress200x83161be053d4d23dc940dcfc94fcf0ba39582c440x83161be053d4d23dc940dcfc94fcf0ba39582c44
    2epochuint2563217939992200x000000000000000000000000000000000000000000000000000000006aee4174
    3pm25_x10uint256329610x00000000000000000000000000000000000000000000000000000000000003c1
    4pm10_x10uint2563218560x0000000000000000000000000000000000000000000000000000000000000740
    5temp_x10int256322850x000000000000000000000000000000000000000000000000000000000000011d
    6hum_x10uint256326290x0000000000000000000000000000000000000000000000000000000000000275
    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 0x83161be053d4d23dc940dcfc94fcf0ba39582c44
  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": "0x83161be053d4d23dc940dcfc94fcf0ba39582c44",
  "ens": "bkc-sim-02.sim.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793999220,
  "pm25_x10": 961,
  "pm10_x10": 1856,
  "temp_x10": 285,
  "hum_x10": 629,
  "nonce": 477,
  "signature": "0x",
  "simulated": true
}