PranaNet
AQI 164
← bkc-01.prananet.eth
← #408#410 →

Reading #409

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:08:00 IST

PM2.5
88.2 µg/m³
PM10
88.2 µg/m³
Temperature
26.4 °C
Humidity
50.9 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x33bd4036b3fd1ce27e4770b876a78b183ed1a381042bd50548c475b3aa99a657
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:09:15 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997480nonce = 409pm25_x10 = 882pm10_x10 = 882simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 409).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
    2epochuint2563217939974800x000000000000000000000000000000000000000000000000000000006aee3aa8
    3pm25_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    4pm10_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    5temp_x10int256322640x0000000000000000000000000000000000000000000000000000000000000108
    6hum_x10uint256325090x00000000000000000000000000000000000000000000000000000000000001fd
    7nonceuint256324090x0000000000000000000000000000000000000000000000000000000000000199
    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 0x4d9c14232116e6e10ec54069f2342027b7dc8c2f27d77c718c76098679da2092
    s 0x6b90c7ea5a958cc6fa41c4a25f96e3a7db4ffa0016b1f3b2bf993b2b6d960be6
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 409 follows #408, 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": 1793997480,
  "pm25_x10": 882,
  "pm10_x10": 882,
  "temp_x10": 264,
  "hum_x10": 509,
  "nonce": 409,
  "signature": "0x4d9c14232116e6e10ec54069f2342027b7dc8c2f27d77c718c76098679da20926b90c7ea5a958cc6fa41c4a25f96e3a7db4ffa0016b1f3b2bf993b2b6d960be61c",
  "simulated": false
}