PranaNet
AQI 311
← bkc-02.prananet.eth
← #74#76 →

Reading #75

55Satisfactory

bkc-02.prananet.eth · cell te7u6n · 6/11/2026, 17:58:00 IST

PM2.5
33.1 µg/m³
PM10
33.1 µg/m³
Temperature
not measured
Humidity
not measured

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xc30f2f571c7d832f9b7a54b17e59a2fdfc4747bc79ad073d1a5001b2e917b21f
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 17:59:11 IST (3 days after the reading)
Queryable attributes
device = 0x0b715555721a00cce73e03efb239db39a5e313b2ens = bkc-02.prananet.ethgeohash = te7u6nepoch = 1793968080nonce = 75pm25_x10 = 331pm10_x10 = 331simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x0b715555721a00cce73e03efb239db39a5e313b2 && nonce = 75).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
    1deviceaddress200x0b715555721a00cce73e03efb239db39a5e313b20x0b715555721a00cce73e03efb239db39a5e313b2
    2epochuint2563217939680800x000000000000000000000000000000000000000000000000000000006aedc7d0
    3pm25_x10uint256323310x000000000000000000000000000000000000000000000000000000000000014b
    4pm10_x10uint256323310x000000000000000000000000000000000000000000000000000000000000014b
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint25632750x000000000000000000000000000000000000000000000000000000000000004b
    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 0xa92f726244e1ed6a9db2249042a267c82ae4b55809c246e568a070860ea5ad39
    s 0x1426c892e839b14a5fa8209258542c1052cc7270f2bd04ab4c704544be017c9a
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x0b715555721a00cce73e03efb239db39a5e313b2
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 75 follows #74, 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": "0x0b715555721a00cce73e03efb239db39a5e313b2",
  "ens": "bkc-02.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793968080,
  "pm25_x10": 331,
  "pm10_x10": 331,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 75,
  "signature": "0xa92f726244e1ed6a9db2249042a267c82ae4b55809c246e568a070860ea5ad391426c892e839b14a5fa8209258542c1052cc7270f2bd04ab4c704544be017c9a1c",
  "simulated": false
}