PranaNet
AQI 311
← bkc-01.prananet.eth
← #436#438 →

Reading #437

192Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:36:00 IST

PM2.5
87.7 µg/m³
PM10
87.7 µg/m³
Temperature
21.7 °C
Humidity
66.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x29f1f13e7267cba132d85fe3a1033872119cc44c3a28920962dc121890fe5a47
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:37:07 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793999160nonce = 437pm25_x10 = 877pm10_x10 = 877simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 437).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
    2epochuint2563217939991600x000000000000000000000000000000000000000000000000000000006aee4138
    3pm25_x10uint256328770x000000000000000000000000000000000000000000000000000000000000036d
    4pm10_x10uint256328770x000000000000000000000000000000000000000000000000000000000000036d
    5temp_x10int256322170x00000000000000000000000000000000000000000000000000000000000000d9
    6hum_x10uint256326680x000000000000000000000000000000000000000000000000000000000000029c
    7nonceuint256324370x00000000000000000000000000000000000000000000000000000000000001b5
    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 0x1dbe43bb2ca2bbbb912692fadf7de601c8eaff0b8c265ac6138cc0efc045b15f
    s 0x7159f111732fe8eee80bc6d166977aa6e3857dad12a1a90d2900afadac56a197
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 437 follows #436, 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": 1793999160,
  "pm25_x10": 877,
  "pm10_x10": 877,
  "temp_x10": 217,
  "hum_x10": 668,
  "nonce": 437,
  "signature": "0x1dbe43bb2ca2bbbb912692fadf7de601c8eaff0b8c265ac6138cc0efc045b15f7159f111732fe8eee80bc6d166977aa6e3857dad12a1a90d2900afadac56a1971b",
  "simulated": false
}