PranaNet
AQI 146
← bkc-01.prananet.eth
← #472#474 →

Reading #473

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:12:00 IST

PM2.5
88.1 µg/m³
PM10
88.1 µg/m³
Temperature
22.2 °C
Humidity
70.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x06c2c4f2a73e59cddcf25c400f9f440181297d78de2f52a445c2218560fc5147
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:13:09 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794001320nonce = 473pm25_x10 = 881pm10_x10 = 881simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 473).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
    2epochuint2563217940013200x000000000000000000000000000000000000000000000000000000006aee49a8
    3pm25_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    4pm10_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    5temp_x10int256322220x00000000000000000000000000000000000000000000000000000000000000de
    6hum_x10uint256327040x00000000000000000000000000000000000000000000000000000000000002c0
    7nonceuint256324730x00000000000000000000000000000000000000000000000000000000000001d9
    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 0x7c3ccf510da2d0cfc6f284d7cb7f2550a262feac2c7c0d65e598af019bab782c
    s 0x4ddffa0b280cb0e3ebf768ebdbf808a6cb9f8a2e596de51e9f805250d920704d
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 473 follows #472, 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": 1794001320,
  "pm25_x10": 881,
  "pm10_x10": 881,
  "temp_x10": 222,
  "hum_x10": 704,
  "nonce": 473,
  "signature": "0x7c3ccf510da2d0cfc6f284d7cb7f2550a262feac2c7c0d65e598af019bab782c4ddffa0b280cb0e3ebf768ebdbf808a6cb9f8a2e596de51e9f805250d920704d1b",
  "simulated": false
}