PranaNet
AQI 114
← bkc-01.prananet.eth
← #289#291 →

Reading #290

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:10:00 IST

PM2.5
87.4 µg/m³
PM10
87.4 µg/m³
Temperature
22.8 °C
Humidity
61.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xaab3b0d344f523ace7db1557c27d562ebd82623fe9f607dbccc98cf0c3ce207b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:00:28 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793990400nonce = 290pm25_x10 = 874pm10_x10 = 874simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 290).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
    2epochuint2563217939904000x000000000000000000000000000000000000000000000000000000006aee1f00
    3pm25_x10uint256328740x000000000000000000000000000000000000000000000000000000000000036a
    4pm10_x10uint256328740x000000000000000000000000000000000000000000000000000000000000036a
    5temp_x10int256322280x00000000000000000000000000000000000000000000000000000000000000e4
    6hum_x10uint256326110x0000000000000000000000000000000000000000000000000000000000000263
    7nonceuint256322900x0000000000000000000000000000000000000000000000000000000000000122
    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 0x639258e6c4a9d5bda967f462fea0dd0faf8d4d56cc64a4fc54fd7c1897b95843
    s 0x7f615cc3312d7358da09c25e8978975117e492c40260a4ebe8b81e510bd5ebc3
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 290 follows #289, 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": 1793990400,
  "pm25_x10": 874,
  "pm10_x10": 874,
  "temp_x10": 228,
  "hum_x10": 611,
  "nonce": 290,
  "signature": "0x639258e6c4a9d5bda967f462fea0dd0faf8d4d56cc64a4fc54fd7c1897b958437f615cc3312d7358da09c25e8978975117e492c40260a4ebe8b81e510bd5ebc31c",
  "simulated": false
}