PranaNet
AQI 53
← bkc-sim-05.sim.prananet.eth
← #514#516 →

Reading #515

290Poor

bkc-sim-05.sim.prananet.eth · cell te7u6q · 7/11/2026, 03:16:00 IST · simulated device

PM2.5
117.1 µg/m³
PM10
218.7 µg/m³
Temperature
28.8 °C
Humidity
62.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xa61904fbc2b4a8d425b6563451d2f605bece09da9ba06343aa0b4ab78916f753
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:18:04 IST (3 days after the reading)
Queryable attributes
device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397ens = bkc-sim-05.sim.prananet.ethgeohash = te7u6qepoch = 1794001560nonce = 515pm25_x10 = 1171pm10_x10 = 2187simulated = true
Query that finds this record
from("prananet.reading").where(device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397 && nonce = 515).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
    2epochuint2563217940015600x000000000000000000000000000000000000000000000000000000006aee4a98
    3pm25_x10uint2563211710x0000000000000000000000000000000000000000000000000000000000000493
    4pm10_x10uint2563221870x000000000000000000000000000000000000000000000000000000000000088b
    5temp_x10int256322880x0000000000000000000000000000000000000000000000000000000000000120
    6hum_x10uint256326220x000000000000000000000000000000000000000000000000000000000000026e
    7nonceuint256325150x0000000000000000000000000000000000000000000000000000000000000203
    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 515 follows #514, 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": 1794001560,
  "pm25_x10": 1171,
  "pm10_x10": 2187,
  "temp_x10": 288,
  "hum_x10": 622,
  "nonce": 515,
  "signature": "0x",
  "simulated": true
}