PranaNet
AQI 142
← bkc-01.prananet.eth
← #503#506 →

Reading #504

209Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:43:00 IST

PM2.5
92.7 µg/m³
PM10
92.7 µg/m³
Temperature
22.5 °C
Humidity
69.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xa5db4f9d6ea7744e918fedfc9547b66f77ab15ec450fe81146f146caff5b2ab6
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:44:21 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003180nonce = 504pm25_x10 = 927pm10_x10 = 927simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 504).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
    2epochuint2563217940031800x000000000000000000000000000000000000000000000000000000006aee50ec
    3pm25_x10uint256329270x000000000000000000000000000000000000000000000000000000000000039f
    4pm10_x10uint256329270x000000000000000000000000000000000000000000000000000000000000039f
    5temp_x10int256322250x00000000000000000000000000000000000000000000000000000000000000e1
    6hum_x10uint256326950x00000000000000000000000000000000000000000000000000000000000002b7
    7nonceuint256325040x00000000000000000000000000000000000000000000000000000000000001f8
    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 0x3a989942447d8a413d2b3b0ffe55f8c2cc2c942334ed77c92b6bcd0e93e67be5
    s 0x068f81e9f9ec0939e129e909010022b5277a17cb1ce19b52420cdc276867a2c5
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 504 follows #503, so this reading can't be replayed.
  6. ✕
    Step 6

    Cross-checked against neighbours

    Flagged by the verifier: 92.7 µg/m³ against a neighbour median of 60.3 µg/m³ (neighbour outlier). The signature is genuine, but the value disagrees with its neighbours by more than 50% and 25 µg/m³. Flag tx ↗

Raw reading JSON
{
  "device": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
  "ens": "bkc-01.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1794003180,
  "pm25_x10": 927,
  "pm10_x10": 927,
  "temp_x10": 225,
  "hum_x10": 695,
  "nonce": 504,
  "signature": "0x3a989942447d8a413d2b3b0ffe55f8c2cc2c942334ed77c92b6bcd0e93e67be5068f81e9f9ec0939e129e909010022b5277a17cb1ce19b52420cdc276867a2c51c",
  "simulated": false
}