PranaNet
AQI 372
← bkc-sim-03.sim.prananet.eth
← #412#414 →

Reading #413

255Poor

bkc-sim-03.sim.prananet.eth · cell te7u6p · 7/11/2026, 01:31:00 IST · simulated device

PM2.5
106.5 µg/m³
PM10
188.4 µg/m³
Temperature
28.5 °C
Humidity
61.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xe508b928270839a2d4b810d75332f211808c078b4cfa2acd5f740781f102d402
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:33:18 IST (3 days after the reading)
Queryable attributes
device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7ens = bkc-sim-03.sim.prananet.ethgeohash = te7u6pepoch = 1793995260nonce = 413pm25_x10 = 1065pm10_x10 = 1884simulated = true
Query that finds this record
from("prananet.reading").where(device = 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7 && nonce = 413).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
    1deviceaddress200xd9c632585a2a926bbcecb64241d9cc0ea0d5efd70xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7
    2epochuint2563217939952600x000000000000000000000000000000000000000000000000000000006aee31fc
    3pm25_x10uint2563210650x0000000000000000000000000000000000000000000000000000000000000429
    4pm10_x10uint2563218840x000000000000000000000000000000000000000000000000000000000000075c
    5temp_x10int256322850x000000000000000000000000000000000000000000000000000000000000011d
    6hum_x10uint256326140x0000000000000000000000000000000000000000000000000000000000000266
    7nonceuint256324130x000000000000000000000000000000000000000000000000000000000000019d
    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 0x
    s 0x
    v NaN
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 413 follows #412, 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": "0xd9c632585a2a926bbcecb64241d9cc0ea0d5efd7",
  "ens": "bkc-sim-03.sim.prananet.eth",
  "geohash": "te7u6p",
  "epoch": 1793995260,
  "pm25_x10": 1065,
  "pm10_x10": 1884,
  "temp_x10": 285,
  "hum_x10": 614,
  "nonce": 413,
  "signature": "0x",
  "simulated": true
}