PranaNet
AQI 312
← bkc-01.prananet.eth
← #433#436 →

Reading #435

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:34:00 IST

PM2.5
87.8 µg/m³
PM10
87.8 µg/m³
Temperature
21.8 °C
Humidity
66.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xd582300973c2289ff822260bb2f2be7e9465dfecd03bf0f289c24cbcb6281774
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:35:19 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793999040nonce = 435pm25_x10 = 878pm10_x10 = 878simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 435).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
    2epochuint2563217939990400x000000000000000000000000000000000000000000000000000000006aee40c0
    3pm25_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    4pm10_x10uint256328780x000000000000000000000000000000000000000000000000000000000000036e
    5temp_x10int256322180x00000000000000000000000000000000000000000000000000000000000000da
    6hum_x10uint256326600x0000000000000000000000000000000000000000000000000000000000000294
    7nonceuint256324350x00000000000000000000000000000000000000000000000000000000000001b3
    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 0x9bdba832ab7333f778984871104a181f7e7a31d7399238679640672b2d40225a
    s 0x698fea2cdf30551821b247d6b90a8c19f86c166b17d852e11487b397e20195eb
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 435 follows #433, 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": 1793999040,
  "pm25_x10": 878,
  "pm10_x10": 878,
  "temp_x10": 218,
  "hum_x10": 660,
  "nonce": 435,
  "signature": "0x9bdba832ab7333f778984871104a181f7e7a31d7399238679640672b2d40225a698fea2cdf30551821b247d6b90a8c19f86c166b17d852e11487b397e20195eb1b",
  "simulated": false
}