PranaNet
AQI 179
← bkc-02c.prananet.eth
← #208#210 →

Reading #209

197Moderate

bkc-02c.prananet.eth · cell te7u6n · 7/11/2026, 03:52:00 IST

PM2.5
89.2 µg/m³
PM10
89.2 µg/m³
Temperature
not measured
Humidity
not measured

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x0c0ac473490178c4b4d4685bac9d29a017a7176b2036bc0aa800071f4496cb16
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:53:19 IST (3 days after the reading)
Queryable attributes
device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1ens = bkc-02c.prananet.ethgeohash = te7u6nepoch = 1794003720nonce = 209pm25_x10 = 892pm10_x10 = 892simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 && nonce = 209).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
    1deviceaddress200x11d415367d2d3440e5beea30a18ef0fdeb0638d10x11d415367d2d3440e5beea30a18ef0fdeb0638d1
    2epochuint2563217940037200x000000000000000000000000000000000000000000000000000000006aee5308
    3pm25_x10uint256328920x000000000000000000000000000000000000000000000000000000000000037c
    4pm10_x10uint256328920x000000000000000000000000000000000000000000000000000000000000037c
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint256322090x00000000000000000000000000000000000000000000000000000000000000d1
    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 0x2c01bb4c32dd36cbbda078629bffb70b48e9375fc5e4576b77da0919ad4a0469
    s 0x18b4cc7797143080f673e7ad53dbc75de00a678f02a7d202665ebedd255dfced
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 209 follows #208, 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": "0x11d415367d2d3440e5beea30a18ef0fdeb0638d1",
  "ens": "bkc-02c.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794003720,
  "pm25_x10": 892,
  "pm10_x10": 892,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 209,
  "signature": "0x2c01bb4c32dd36cbbda078629bffb70b48e9375fc5e4576b77da0919ad4a046918b4cc7797143080f673e7ad53dbc75de00a678f02a7d202665ebedd255dfced1b",
  "simulated": false
}