PranaNet
AQI 29
← bkc-01.prananet.eth
← #322#328 →

Reading #324

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:44:00 IST

PM2.5
87.2 µg/m³
PM10
87.2 µg/m³
Temperature
23.1 °C
Humidity
52.9 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x2649451617090b20ec2f2e7a0d916323928ee57ac5a6cbdce29d31c44a064363
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:45:08 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793992440nonce = 324pm25_x10 = 872pm10_x10 = 872simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 324).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
    2epochuint2563217939924400x000000000000000000000000000000000000000000000000000000006aee26f8
    3pm25_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    4pm10_x10uint256328720x0000000000000000000000000000000000000000000000000000000000000368
    5temp_x10int256322310x00000000000000000000000000000000000000000000000000000000000000e7
    6hum_x10uint256325290x0000000000000000000000000000000000000000000000000000000000000211
    7nonceuint256323240x0000000000000000000000000000000000000000000000000000000000000144
    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 0xbf161d47076c45f867141250ccb072720e3e2a39b2d92adf30d68b4ba49c94c0
    s 0x11827f033f07c8e8f7c3cf34e80ab75216ff37c922bffb48f6c8e800b15674e8
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 324 follows #322, 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": 1793992440,
  "pm25_x10": 872,
  "pm10_x10": 872,
  "temp_x10": 231,
  "hum_x10": 529,
  "nonce": 324,
  "signature": "0xbf161d47076c45f867141250ccb072720e3e2a39b2d92adf30d68b4ba49c94c011827f033f07c8e8f7c3cf34e80ab75216ff37c922bffb48f6c8e800b15674e81b",
  "simulated": false
}