PranaNet
AQI 53
← bkc-01.prananet.eth
← #418#420 →

Reading #419

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:18:00 IST

PM2.5
88.0 µg/m³
PM10
88.0 µg/m³
Temperature
23.1 °C
Humidity
59.5 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x937b96e8943d33e89cb1e70febb2978e40dfa9a77558d000e17f96c923387276
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:19:13 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793998080nonce = 419pm25_x10 = 880pm10_x10 = 880simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 419).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
    2epochuint2563217939980800x000000000000000000000000000000000000000000000000000000006aee3d00
    3pm25_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    4pm10_x10uint256328800x0000000000000000000000000000000000000000000000000000000000000370
    5temp_x10int256322310x00000000000000000000000000000000000000000000000000000000000000e7
    6hum_x10uint256325950x0000000000000000000000000000000000000000000000000000000000000253
    7nonceuint256324190x00000000000000000000000000000000000000000000000000000000000001a3
    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 0xcad786bf00d23df4f8c8137abeebe99a37380c46a0c16c9b72ddf6cfe97b4402
    s 0x2acfe69e6459702616e351dd1e59f0cb74e18ba75d47ffcfbb6c57d26ccef3bf
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 419 follows #418, 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": 1793998080,
  "pm25_x10": 880,
  "pm10_x10": 880,
  "temp_x10": 231,
  "hum_x10": 595,
  "nonce": 419,
  "signature": "0xcad786bf00d23df4f8c8137abeebe99a37380c46a0c16c9b72ddf6cfe97b44022acfe69e6459702616e351dd1e59f0cb74e18ba75d47ffcfbb6c57d26ccef3bf1b",
  "simulated": false
}