PranaNet
AQI 89
← bkc-01.prananet.eth
← #349#352 →

Reading #350

196Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:09:00 IST

PM2.5
88.7 µg/m³
PM10
88.7 µg/m³
Temperature
26.5 °C
Humidity
60.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xc7578bb953d1b36d2977190750dc9a0145539d018e0fa15374b12431f96e9083
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:10:12 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993940nonce = 350pm25_x10 = 887pm10_x10 = 887simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 350).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
    2epochuint2563217939939400x000000000000000000000000000000000000000000000000000000006aee2cd4
    3pm25_x10uint256328870x0000000000000000000000000000000000000000000000000000000000000377
    4pm10_x10uint256328870x0000000000000000000000000000000000000000000000000000000000000377
    5temp_x10int256322650x0000000000000000000000000000000000000000000000000000000000000109
    6hum_x10uint256326010x0000000000000000000000000000000000000000000000000000000000000259
    7nonceuint256323500x000000000000000000000000000000000000000000000000000000000000015e
    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 0x61ce2e98cbb0409ba3bc211ef255defc08b6dea21d626d5d7abc286c665e4e9c
    s 0x59bcff414978d1240ca84f18f9a31d49725972a2ea05bbbc4e25f717e2b6584e
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 350 follows #349, 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": 1793993940,
  "pm25_x10": 887,
  "pm10_x10": 887,
  "temp_x10": 265,
  "hum_x10": 601,
  "nonce": 350,
  "signature": "0x61ce2e98cbb0409ba3bc211ef255defc08b6dea21d626d5d7abc286c665e4e9c59bcff414978d1240ca84f18f9a31d49725972a2ea05bbbc4e25f717e2b6584e1c",
  "simulated": false
}