PranaNet
AQI 265
← bkc-01.prananet.eth
← #498#500 →

Reading #499

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:38:00 IST

PM2.5
88.1 µg/m³
PM10
88.1 µg/m³
Temperature
22.4 °C
Humidity
69.3 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x494cdcd4d4a8442aa3e5ffc5a801152a2eb6dd103c6f40ae4b3f6d615fbee464
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:39:19 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794002880nonce = 499pm25_x10 = 881pm10_x10 = 881simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 499).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
    1deviceaddress200x4379c30ae56431f0485731f6e730ee0084e955c00x4379c30ae56431f0485731f6e730ee0084e955c0
    2epochuint2563217940028800x000000000000000000000000000000000000000000000000000000006aee4fc0
    3pm25_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    4pm10_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    5temp_x10int256322240x00000000000000000000000000000000000000000000000000000000000000e0
    6hum_x10uint256326930x00000000000000000000000000000000000000000000000000000000000002b5
    7nonceuint256324990x00000000000000000000000000000000000000000000000000000000000001f3
    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 0x7407f7c281ff1dda56c0e98a62681b2c0fb34ddc9404c0cb5a79a43e78fb778a
    s 0x0ebafbd7d9c887ec2af2da36d20b364f55249a34e7ddf671692df1d6ed1e1e04
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 499 follows #498, 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": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
  "ens": "bkc-01.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794002880,
  "pm25_x10": 881,
  "pm10_x10": 881,
  "temp_x10": 224,
  "hum_x10": 693,
  "nonce": 499,
  "signature": "0x7407f7c281ff1dda56c0e98a62681b2c0fb34ddc9404c0cb5a79a43e78fb778a0ebafbd7d9c887ec2af2da36d20b364f55249a34e7ddf671692df1d6ed1e1e041b",
  "simulated": false
}