PranaNet
AQI 312
← bkc-01.prananet.eth
← #450#452 →

Reading #451

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:50:00 IST

PM2.5
87.8 µg/m³
PM10
87.8 µg/m³
Temperature
21.4 °C
Humidity
69.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x393ca50cb2051b32b5d98dab16cb96c4a4f68b81a1e2b3fd989f8f0ac5084916
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:51:06 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794000000nonce = 451pm25_x10 = 878pm10_x10 = 878simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 451).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
    2epochuint2563217940000000x000000000000000000000000000000000000000000000000000000006aee4480
    3pm25_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    4pm10_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    5temp_x10int256322140x00000000000000000000000000000000000000000000000000000000000000d6
    6hum_x10uint256326950x00000000000000000000000000000000000000000000000000000000000002b7
    7nonceuint256324510x00000000000000000000000000000000000000000000000000000000000001c3
    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 0x625440fc9140cb553b4e2a5777bb978214dc2e92b9883f693725cb5d5d854ee1
    s 0x4acafe097e9d9a91ab7a616c168c0d802157985637e4fa7ba8a88ee193b10b32
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 451 follows #450, 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": 1794000000,
  "pm25_x10": 878,
  "pm10_x10": 878,
  "temp_x10": 214,
  "hum_x10": 695,
  "nonce": 451,
  "signature": "0x625440fc9140cb553b4e2a5777bb978214dc2e92b9883f693725cb5d5d854ee14acafe097e9d9a91ab7a616c168c0d802157985637e4fa7ba8a88ee193b10b321c",
  "simulated": false
}