PranaNet
AQI 330
← bkc-01.prananet.eth
← #406#408 →

Reading #407

195Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:06:00 IST

PM2.5
88.4 µg/m³
PM10
88.4 µg/m³
Temperature
27.7 °C
Humidity
48.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x27c4350cb5220f9f16940c0a0df0777f4ddc9b98dad1b07ca008912b274732fe
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:07:08 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997360nonce = 407pm25_x10 = 884pm10_x10 = 884simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 407).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
    2epochuint2563217939973600x000000000000000000000000000000000000000000000000000000006aee3a30
    3pm25_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    4pm10_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    5temp_x10int256322770x0000000000000000000000000000000000000000000000000000000000000115
    6hum_x10uint256324820x00000000000000000000000000000000000000000000000000000000000001e2
    7nonceuint256324070x0000000000000000000000000000000000000000000000000000000000000197
    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 0x9259c22284604fa4a830c3718d0c63659bd5d90e2ded4f77152d12a48daeb272
    s 0x61fab0e3d1092727442242df958aae70d789f1072c7c7e9eb75e6f3757396e2e
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 407 follows #406, 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": 1793997360,
  "pm25_x10": 884,
  "pm10_x10": 884,
  "temp_x10": 277,
  "hum_x10": 482,
  "nonce": 407,
  "signature": "0x9259c22284604fa4a830c3718d0c63659bd5d90e2ded4f77152d12a48daeb27261fab0e3d1092727442242df958aae70d789f1072c7c7e9eb75e6f3757396e2e1c",
  "simulated": false
}