PranaNet
AQI 97
← bkc-01.prananet.eth
← #510#512 →

Reading #511

202Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:50:00 IST

PM2.5
90.5 µg/m³
PM10
90.5 µg/m³
Temperature
22.5 °C
Humidity
69.0 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x3f7e70312f2c76f3320f0e20a0557d93f4a98b1be8adcbc5072aac75bae6bfe0
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:51:36 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003600nonce = 511pm25_x10 = 905pm10_x10 = 905simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 511).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
    2epochuint2563217940036000x000000000000000000000000000000000000000000000000000000006aee5290
    3pm25_x10uint256329050x0000000000000000000000000000000000000000000000000000000000000389
    4pm10_x10uint256329050x0000000000000000000000000000000000000000000000000000000000000389
    5temp_x10int256322250x00000000000000000000000000000000000000000000000000000000000000e1
    6hum_x10uint256326900x00000000000000000000000000000000000000000000000000000000000002b2
    7nonceuint256325110x00000000000000000000000000000000000000000000000000000000000001ff
    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 0x5f4ccf81415e1f9916e82f224855632354c319023fd2744cc3dedc3a1eaf4fad
    s 0x0d28ee577d17f9445df663bfedb7865cb9a589e4eb6edce933889fb550601d5c
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 511 follows #510, 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": 1794003600,
  "pm25_x10": 905,
  "pm10_x10": 905,
  "temp_x10": 225,
  "hum_x10": 690,
  "nonce": 511,
  "signature": "0x5f4ccf81415e1f9916e82f224855632354c319023fd2744cc3dedc3a1eaf4fad0d28ee577d17f9445df663bfedb7865cb9a589e4eb6edce933889fb550601d5c1c",
  "simulated": false
}