PranaNet
AQI 54
← bkc-01.prananet.eth
← #383#388 →

Reading #386

193Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:45:00 IST

PM2.5
87.9 µg/m³
PM10
87.9 µg/m³
Temperature
29.3 °C
Humidity
57.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x990a068242b58059401286d7cb47a6eac247feae085a3fb5938589d95bb1556d
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:46:13 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793996100nonce = 386pm25_x10 = 879pm10_x10 = 879simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 386).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
    2epochuint2563217939961000x000000000000000000000000000000000000000000000000000000006aee3544
    3pm25_x10uint256328790x000000000000000000000000000000000000000000000000000000000000036f
    4pm10_x10uint256328790x000000000000000000000000000000000000000000000000000000000000036f
    5temp_x10int256322930x0000000000000000000000000000000000000000000000000000000000000125
    6hum_x10uint256325710x000000000000000000000000000000000000000000000000000000000000023b
    7nonceuint256323860x0000000000000000000000000000000000000000000000000000000000000182
    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 0xaa0d9c9516efc50723502e2085b605425368d1ae24d1a7118b1dffa32c5960d0
    s 0x766e7e408a6306ba94567a30ca92086770abb42f3320c0b5fdea71866be0472e
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 386 follows #383, 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": 1793996100,
  "pm25_x10": 879,
  "pm10_x10": 879,
  "temp_x10": 293,
  "hum_x10": 571,
  "nonce": 386,
  "signature": "0xaa0d9c9516efc50723502e2085b605425368d1ae24d1a7118b1dffa32c5960d0766e7e408a6306ba94567a30ca92086770abb42f3320c0b5fdea71866be0472e1c",
  "simulated": false
}