PranaNet
AQI 79
← bkc-01.prananet.eth
← #420#423 →

Reading #422

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:21:00 IST

PM2.5
87.8 µg/m³
PM10
87.8 µg/m³
Temperature
22.7 °C
Humidity
62.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xabbe1cd61d0e9d43fe193a9caa7543e3b6ee4a51ef8f9882b3a1d129c258e497
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:22:10 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793998260nonce = 422pm25_x10 = 878pm10_x10 = 878simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 422).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
    2epochuint2563217939982600x000000000000000000000000000000000000000000000000000000006aee3db4
    3pm25_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    4pm10_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    5temp_x10int256322270x00000000000000000000000000000000000000000000000000000000000000e3
    6hum_x10uint256326200x000000000000000000000000000000000000000000000000000000000000026c
    7nonceuint256324220x00000000000000000000000000000000000000000000000000000000000001a6
    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 0x9403c292dee57d9a79215453d8b1e290aca90d8302cb1180a652f051492fa07e
    s 0x147f181c43e808bf3a1e8cf477b1d33732daff8121086a12d9b3e537eef7a60c
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 422 follows #420, 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": 1793998260,
  "pm25_x10": 878,
  "pm10_x10": 878,
  "temp_x10": 227,
  "hum_x10": 620,
  "nonce": 422,
  "signature": "0x9403c292dee57d9a79215453d8b1e290aca90d8302cb1180a652f051492fa07e147f181c43e808bf3a1e8cf477b1d33732daff8121086a12d9b3e537eef7a60c1b",
  "simulated": false
}