PranaNet
AQI 293
← bkc-01.prananet.eth
← #364#368 →

Reading #365

197Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:24:00 IST

PM2.5
89.0 µg/m³
PM10
89.0 µg/m³
Temperature
29.0 °C
Humidity
56.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x94ee586ba5ffaf354444145a4c0194a13a3469cca6fcf6fd855ff8d8f97d78b9
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:25:19 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793994840nonce = 365pm25_x10 = 890pm10_x10 = 890simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 365).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
    2epochuint2563217939948400x000000000000000000000000000000000000000000000000000000006aee3058
    3pm25_x10uint256328900x000000000000000000000000000000000000000000000000000000000000037a
    4pm10_x10uint256328900x000000000000000000000000000000000000000000000000000000000000037a
    5temp_x10int256322900x0000000000000000000000000000000000000000000000000000000000000122
    6hum_x10uint256325680x0000000000000000000000000000000000000000000000000000000000000238
    7nonceuint256323650x000000000000000000000000000000000000000000000000000000000000016d
    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 0x10c1612ace9194a2f652db04591cbeb4437b22d5965f4731dcbd043f09d68fa7
    s 0x43076b87e7d1e476994a89a54a85c5de31ef4d823aa3b0199f849aac56096654
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 365 follows #364, 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": 1793994840,
  "pm25_x10": 890,
  "pm10_x10": 890,
  "temp_x10": 290,
  "hum_x10": 568,
  "nonce": 365,
  "signature": "0x10c1612ace9194a2f652db04591cbeb4437b22d5965f4731dcbd043f09d68fa743076b87e7d1e476994a89a54a85c5de31ef4d823aa3b0199f849aac560966541b",
  "simulated": false
}