PranaNet
AQI 99
← bkc-01.prananet.eth
← #355#357 →

Reading #356

200Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:15:00 IST

PM2.5
90.0 µg/m³
PM10
90.0 µg/m³
Temperature
27.7 °C
Humidity
58.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x1c7de3ddf2cd6d8b6db8a6b0749a2ecdfd4c3ae9800fd0118ed49f324a8e4bc5
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:16:14 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793994300nonce = 356pm25_x10 = 900pm10_x10 = 900simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 356).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
    2epochuint2563217939943000x000000000000000000000000000000000000000000000000000000006aee2e3c
    3pm25_x10uint256329000x0000000000000000000000000000000000000000000000000000000000000384
    4pm10_x10uint256329000x0000000000000000000000000000000000000000000000000000000000000384
    5temp_x10int256322770x0000000000000000000000000000000000000000000000000000000000000115
    6hum_x10uint256325820x0000000000000000000000000000000000000000000000000000000000000246
    7nonceuint256323560x0000000000000000000000000000000000000000000000000000000000000164
    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 0x4d5f0d035f302335643c9945e6d7d3f0474bb37ed8b4f537d271f5011e88f06b
    s 0x1bd110eb3eb110f1468d066ccf43bb9e497fd0cafe83cfd005b9b99ae55f3db5
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 356 follows #355, 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": 1793994300,
  "pm25_x10": 900,
  "pm10_x10": 900,
  "temp_x10": 277,
  "hum_x10": 582,
  "nonce": 356,
  "signature": "0x4d5f0d035f302335643c9945e6d7d3f0474bb37ed8b4f537d271f5011e88f06b1bd110eb3eb110f1468d066ccf43bb9e497fd0cafe83cfd005b9b99ae55f3db51c",
  "simulated": false
}