PranaNet
AQI 311
← bkc-02.prananet.eth
← #89#91 →

Reading #90

55Satisfactory

bkc-02.prananet.eth · cell te7u6n · 6/11/2026, 18:13:00 IST

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

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xc1b487b1d841e73f5d38004c7914eb9c9b6fd0ddae8ed8fb0f4a29e22c0edc0b
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 18:14:11 IST (3 days after the reading)
Queryable attributes
device = 0x0b715555721a00cce73e03efb239db39a5e313b2ens = bkc-02.prananet.ethgeohash = te7u6nepoch = 1793968980nonce = 90pm25_x10 = 330pm10_x10 = 330simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x0b715555721a00cce73e03efb239db39a5e313b2 && nonce = 90).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
    2epochuint2563217939689800x000000000000000000000000000000000000000000000000000000006aedcb54
    3pm25_x10uint256323300x000000000000000000000000000000000000000000000000000000000000014a
    4pm10_x10uint256323300x000000000000000000000000000000000000000000000000000000000000014a
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint25632900x000000000000000000000000000000000000000000000000000000000000005a
    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 0x3c2c813c258fa9235782353adb014c19f5e6d00e76a2853dbfec124a0dfe8bce
    s 0x731a9679b858270dcf25c5f1e67d28ee0818a4d98d16fc151b924a6435e63e56
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x0b715555721a00cce73e03efb239db39a5e313b2
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 90 follows #89, 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": 1793968980,
  "pm25_x10": 330,
  "pm10_x10": 330,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 90,
  "signature": "0x3c2c813c258fa9235782353adb014c19f5e6d00e76a2853dbfec124a0dfe8bce731a9679b858270dcf25c5f1e67d28ee0818a4d98d16fc151b924a6435e63e561b",
  "simulated": false
}