PranaNet
AQI 118
← bkc-01.prananet.eth
← #356#358 →

Reading #357

198Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:16:00 IST

PM2.5
89.5 µg/m³
PM10
89.5 µg/m³
Temperature
27.9 °C
Humidity
58.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1afbf68edf6e63cf08332469622c93bf63cf1233b41f01f5cf0df9bb466c69fe
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:17:15 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793994360nonce = 357pm25_x10 = 895pm10_x10 = 895simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 357).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
    2epochuint2563217939943600x000000000000000000000000000000000000000000000000000000006aee2e78
    3pm25_x10uint256328950x000000000000000000000000000000000000000000000000000000000000037f
    4pm10_x10uint256328950x000000000000000000000000000000000000000000000000000000000000037f
    5temp_x10int256322790x0000000000000000000000000000000000000000000000000000000000000117
    6hum_x10uint256325800x0000000000000000000000000000000000000000000000000000000000000244
    7nonceuint256323570x0000000000000000000000000000000000000000000000000000000000000165
    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 0x0dfdc3560931b5e10c4b59829430a81d8205e37c42905e0f60f88d783cc77077
    s 0x0a9dbaa3f06b6707266c1388e61f3cf88bd31de2d1741684256db3b959522994
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 357 follows #356, 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": 1793994360,
  "pm25_x10": 895,
  "pm10_x10": 895,
  "temp_x10": 279,
  "hum_x10": 580,
  "nonce": 357,
  "signature": "0x0dfdc3560931b5e10c4b59829430a81d8205e37c42905e0f60f88d783cc770770a9dbaa3f06b6707266c1388e61f3cf88bd31de2d1741684256db3b9595229941c",
  "simulated": false
}