PranaNet
AQI 105
← bkc-01.prananet.eth
← #509#511 →

Reading #510

201Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:49:00 IST

PM2.5
90.3 µg/m³
PM10
90.3 µg/m³
Temperature
22.5 °C
Humidity
69.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xca88a740fc576fad804b82a8dfdf5e0882474f20881332fcf814170e7a9b94cf
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 03:50:37 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003540nonce = 510pm25_x10 = 903pm10_x10 = 903simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 510).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
    2epochuint2563217940035400x000000000000000000000000000000000000000000000000000000006aee5254
    3pm25_x10uint256329030x0000000000000000000000000000000000000000000000000000000000000387
    4pm10_x10uint256329030x0000000000000000000000000000000000000000000000000000000000000387
    5temp_x10int256322250x00000000000000000000000000000000000000000000000000000000000000e1
    6hum_x10uint256326910x00000000000000000000000000000000000000000000000000000000000002b3
    7nonceuint256325100x00000000000000000000000000000000000000000000000000000000000001fe
    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 0xc228a86769b43873576b81278007785564b5dc757e3309ce503275ecf9d68b38
    s 0x24f8ca72d57f5c7884ac8f74fcfac1d2912fdc481ec54a19e993a50686021858
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 510 follows #509, 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": 1794003540,
  "pm25_x10": 903,
  "pm10_x10": 903,
  "temp_x10": 225,
  "hum_x10": 691,
  "nonce": 510,
  "signature": "0xc228a86769b43873576b81278007785564b5dc757e3309ce503275ecf9d68b3824f8ca72d57f5c7884ac8f74fcfac1d2912fdc481ec54a19e993a506860218581c",
  "simulated": false
}