PranaNet
AQI 94
← bkc-01.prananet.eth
← #286#288 →

Reading #287

191Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:07:00 IST

PM2.5
87.4 µg/m³
PM10
87.4 µg/m³
Temperature
22.6 °C
Humidity
61.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xcc89e9673e95a3a6e8c474e5c7e2519e3245bc3c21342643c9c26e87638fdbf3
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 00:08:39 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793990220nonce = 287pm25_x10 = 874pm10_x10 = 874simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 287).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
    2epochuint2563217939902200x000000000000000000000000000000000000000000000000000000006aee1e4c
    3pm25_x10uint256328740x000000000000000000000000000000000000000000000000000000000000036a
    4pm10_x10uint256328740x000000000000000000000000000000000000000000000000000000000000036a
    5temp_x10int256322260x00000000000000000000000000000000000000000000000000000000000000e2
    6hum_x10uint256326150x0000000000000000000000000000000000000000000000000000000000000267
    7nonceuint256322870x000000000000000000000000000000000000000000000000000000000000011f
    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 0x2dc2573871fea58e02b1ba458b836ea7cd1bfb21f10cd38d388c94af0a43455f
    s 0x1d0fac3e8114e8d3f7cc745fad103869b29dcb9c8fc4fd478a3fe0af8e037d2e
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 287 follows #286, 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": 1793990220,
  "pm25_x10": 874,
  "pm10_x10": 874,
  "temp_x10": 226,
  "hum_x10": 615,
  "nonce": 287,
  "signature": "0x2dc2573871fea58e02b1ba458b836ea7cd1bfb21f10cd38d388c94af0a43455f1d0fac3e8114e8d3f7cc745fad103869b29dcb9c8fc4fd478a3fe0af8e037d2e1b",
  "simulated": false
}