PranaNet
AQI 159
← bkc-sim-05.sim.prananet.eth
← #508#510 →

Reading #509

266Poor

bkc-sim-05.sim.prananet.eth · cell te7u6q · 7/11/2026, 03:10:00 IST · simulated device

PM2.5
109.9 µg/m³
PM10
205.4 µg/m³
Temperature
29.6 °C
Humidity
65.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x4065ff3c7d8628aca513d4d605e88b58b66492ecbd384404e901d8dd891fabd2
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:11:59 IST (3 days after the reading)
Queryable attributes
device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397ens = bkc-sim-05.sim.prananet.ethgeohash = te7u6qepoch = 1794001200nonce = 509pm25_x10 = 1099pm10_x10 = 2054simulated = true
Query that finds this record
from("prananet.reading").where(device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397 && nonce = 509).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
    1deviceaddress200x6ba7ec7f9de29074c329cadb667a6f54124193970x6ba7ec7f9de29074c329cadb667a6f5412419397
    2epochuint2563217940012000x000000000000000000000000000000000000000000000000000000006aee4930
    3pm25_x10uint2563210990x000000000000000000000000000000000000000000000000000000000000044b
    4pm10_x10uint2563220540x0000000000000000000000000000000000000000000000000000000000000806
    5temp_x10int256322960x0000000000000000000000000000000000000000000000000000000000000128
    6hum_x10uint256326520x000000000000000000000000000000000000000000000000000000000000028c
    7nonceuint256325090x00000000000000000000000000000000000000000000000000000000000001fd
    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 0x6ba7ec7f9de29074c329cadb667a6f5412419397
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 509 follows #508, 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": "0x6ba7ec7f9de29074c329cadb667a6f5412419397",
  "ens": "bkc-sim-05.sim.prananet.eth",
  "geohash": "te7u6q",
  "epoch": 1794001200,
  "pm25_x10": 1099,
  "pm10_x10": 2054,
  "temp_x10": 296,
  "hum_x10": 652,
  "nonce": 509,
  "signature": "0x",
  "simulated": true
}