PranaNet
AQI 53
← bkc-01.prananet.eth
← #346#349 →

Reading #348

195Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:07:00 IST

PM2.5
88.4 µg/m³
PM10
88.4 µg/m³
Temperature
25.9 °C
Humidity
61.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x5ae192978159a272758aa7e066d81e8ef58309f7914d845c5abc515a6f8907f0
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:08:12 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793993820nonce = 348pm25_x10 = 884pm10_x10 = 884simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 348).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
    2epochuint2563217939938200x000000000000000000000000000000000000000000000000000000006aee2c5c
    3pm25_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    4pm10_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    5temp_x10int256322590x0000000000000000000000000000000000000000000000000000000000000103
    6hum_x10uint256326100x0000000000000000000000000000000000000000000000000000000000000262
    7nonceuint256323480x000000000000000000000000000000000000000000000000000000000000015c
    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 0xde01f6080947d573a0f9be08e1bffaf2e66372bd0cc76bdc1e5f39fa471b7c6e
    s 0x12d1c6ab8833002dfe9f59416d3f552f4d701896b1d7a88711b25eba829499bc
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 348 follows #346, 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": 1793993820,
  "pm25_x10": 884,
  "pm10_x10": 884,
  "temp_x10": 259,
  "hum_x10": 610,
  "nonce": 348,
  "signature": "0xde01f6080947d573a0f9be08e1bffaf2e66372bd0cc76bdc1e5f39fa471b7c6e12d1c6ab8833002dfe9f59416d3f552f4d701896b1d7a88711b25eba829499bc1c",
  "simulated": false
}