PranaNet
AQI 109
← bkc-01.prananet.eth
← #473#475 →

Reading #474

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:13:00 IST

PM2.5
88.3 µg/m³
PM10
88.3 µg/m³
Temperature
22.2 °C
Humidity
70.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x7f82d182454480166102663df06e6b54ab04b65cabb1022073d539d1c26f0ea7
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:14:12 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794001380nonce = 474pm25_x10 = 883pm10_x10 = 883simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 474).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
    2epochuint2563217940013800x000000000000000000000000000000000000000000000000000000006aee49e4
    3pm25_x10uint256328830x0000000000000000000000000000000000000000000000000000000000000373
    4pm10_x10uint256328830x0000000000000000000000000000000000000000000000000000000000000373
    5temp_x10int256322220x00000000000000000000000000000000000000000000000000000000000000de
    6hum_x10uint256327010x00000000000000000000000000000000000000000000000000000000000002bd
    7nonceuint256324740x00000000000000000000000000000000000000000000000000000000000001da
    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 0xdcb54e033dfa689462ad459ff1c30112b8b90b624868c73669187cca39d16a25
    s 0x20130db5efae9487c2673d60accae3d355a72ad5ce28e5da1d37abc1e7ad0de8
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 474 follows #473, 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": 1794001380,
  "pm25_x10": 883,
  "pm10_x10": 883,
  "temp_x10": 222,
  "hum_x10": 701,
  "nonce": 474,
  "signature": "0xdcb54e033dfa689462ad459ff1c30112b8b90b624868c73669187cca39d16a2520130db5efae9487c2673d60accae3d355a72ad5ce28e5da1d37abc1e7ad0de81b",
  "simulated": false
}