PranaNet
AQI 277
← bkc-01.prananet.eth
← #357#359 →

Reading #358

197Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:17:00 IST

PM2.5
89.2 µg/m³
PM10
89.2 µg/m³
Temperature
28.1 °C
Humidity
57.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x042fa5f27b663128bef0b31a66e7d7c1059475ca5fda197d757608e23c2aaa58
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:18:16 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793994420nonce = 358pm25_x10 = 892pm10_x10 = 892simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 358).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
    2epochuint2563217939944200x000000000000000000000000000000000000000000000000000000006aee2eb4
    3pm25_x10uint256328920x000000000000000000000000000000000000000000000000000000000000037c
    4pm10_x10uint256328920x000000000000000000000000000000000000000000000000000000000000037c
    5temp_x10int256322810x0000000000000000000000000000000000000000000000000000000000000119
    6hum_x10uint256325780x0000000000000000000000000000000000000000000000000000000000000242
    7nonceuint256323580x0000000000000000000000000000000000000000000000000000000000000166
    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 0x8072ab8b80ba508b26ab81b23ecedceb5a5d10c9ade3c8ca58dcace65b66f806
    s 0x6c38dc4a6fa9199937930102dd3f588de6fb265c93977fdd1feb7c1f1c8a9ada
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 358 follows #357, 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": 1793994420,
  "pm25_x10": 892,
  "pm10_x10": 892,
  "temp_x10": 281,
  "hum_x10": 578,
  "nonce": 358,
  "signature": "0x8072ab8b80ba508b26ab81b23ecedceb5a5d10c9ade3c8ca58dcace65b66f8066c38dc4a6fa9199937930102dd3f588de6fb265c93977fdd1feb7c1f1c8a9ada1b",
  "simulated": false
}