PranaNet
AQI 331
← bkc-01.prananet.eth
← #398#402 →

Reading #400

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:59:00 IST

PM2.5
88.0 µg/m³
PM10
88.0 µg/m³
Temperature
29.5 °C
Humidity
55.9 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x8aa992741f4854012c0f78d6b4443cc41657987916625910bdc50de4eab868b9
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:00:09 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793996940nonce = 400pm25_x10 = 880pm10_x10 = 880simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 400).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
    2epochuint2563217939969400x000000000000000000000000000000000000000000000000000000006aee388c
    3pm25_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    4pm10_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    5temp_x10int256322950x0000000000000000000000000000000000000000000000000000000000000127
    6hum_x10uint256325590x000000000000000000000000000000000000000000000000000000000000022f
    7nonceuint256324000x0000000000000000000000000000000000000000000000000000000000000190
    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 0xfb1a3c00214dcaaa5264a4c2c17a9f2011662d312e49373670f507281eea458c
    s 0x6568197be23c63cfe2570b62303994571834154ebd15ff06b06d10530025f97e
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 400 follows #398, 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": 1793996940,
  "pm25_x10": 880,
  "pm10_x10": 880,
  "temp_x10": 295,
  "hum_x10": 559,
  "nonce": 400,
  "signature": "0xfb1a3c00214dcaaa5264a4c2c17a9f2011662d312e49373670f507281eea458c6568197be23c63cfe2570b62303994571834154ebd15ff06b06d10530025f97e1c",
  "simulated": false
}