PranaNet
AQI 182
← bkc-01.prananet.eth
← #500#503 →

Reading #502

207Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:41:00 IST

PM2.5
92.2 µg/m³
PM10
92.2 µg/m³
Temperature
22.4 °C
Humidity
69.6 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x99e12d8b38670e69a28f9e3e956494badaea1d2614344089b9159805b61a99c6
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:42:19 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003060nonce = 502pm25_x10 = 922pm10_x10 = 922simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 502).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
    2epochuint2563217940030600x000000000000000000000000000000000000000000000000000000006aee5074
    3pm25_x10uint256329220x000000000000000000000000000000000000000000000000000000000000039a
    4pm10_x10uint256329220x000000000000000000000000000000000000000000000000000000000000039a
    5temp_x10int256322240x00000000000000000000000000000000000000000000000000000000000000e0
    6hum_x10uint256326960x00000000000000000000000000000000000000000000000000000000000002b8
    7nonceuint256325020x00000000000000000000000000000000000000000000000000000000000001f6
    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 0x02e11d90e0906d61f4dba9fe4a7af2267c537b47ac267b398f67d38aa7ccdb18
    s 0x62efce37130a88774b33d067da7813c1136f12882c3c775e0c0844578cb4f535
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 502 follows #500, 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": 1794003060,
  "pm25_x10": 922,
  "pm10_x10": 922,
  "temp_x10": 224,
  "hum_x10": 696,
  "nonce": 502,
  "signature": "0x02e11d90e0906d61f4dba9fe4a7af2267c537b47ac267b398f67d38aa7ccdb1862efce37130a88774b33d067da7813c1136f12882c3c775e0c0844578cb4f5351c",
  "simulated": false
}