PranaNet
AQI 500
← bkc-01.prananet.eth
← #531#535 →

Reading #534

214Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 04:14:00 IST

PM2.5
94.3 µg/m³
PM10
94.3 µg/m³
Temperature
22.0 °C
Humidity
70.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xc1a1c29134c0bdefebc821f837284b1557c2fe53b86a041e0736717b8d343121
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 04:15:40 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794005040nonce = 534pm25_x10 = 943pm10_x10 = 943simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 534).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
    2epochuint2563217940050400x000000000000000000000000000000000000000000000000000000006aee5830
    3pm25_x10uint256329430x00000000000000000000000000000000000000000000000000000000000003af
    4pm10_x10uint256329430x00000000000000000000000000000000000000000000000000000000000003af
    5temp_x10int256322200x00000000000000000000000000000000000000000000000000000000000000dc
    6hum_x10uint256327040x00000000000000000000000000000000000000000000000000000000000002c0
    7nonceuint256325340x0000000000000000000000000000000000000000000000000000000000000216
    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 0x611e9a3fe84012f8eb5f755bb4e224eb7b70ede6405bd995ede37d79a613fb75
    s 0x217482e7ce2eb837f832f5132493c9e5765f460ebc453f24969c6e00a4c6f85d
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 534 follows #531, 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": 1794005040,
  "pm25_x10": 943,
  "pm10_x10": 943,
  "temp_x10": 220,
  "hum_x10": 704,
  "nonce": 534,
  "signature": "0x611e9a3fe84012f8eb5f755bb4e224eb7b70ede6405bd995ede37d79a613fb75217482e7ce2eb837f832f5132493c9e5765f460ebc453f24969c6e00a4c6f85d1c",
  "simulated": false
}