PranaNet
AQI 59
← bkc-01.prananet.eth
← #386#389 →

Reading #388

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:47:00 IST

PM2.5
88.1 µg/m³
PM10
88.1 µg/m³
Temperature
29.4 °C
Humidity
57.1 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xb6c917c6869f87d2b4d542e1d21d1796ca7f425d4eb04090e0559bc6f2220e0d
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:48:10 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793996220nonce = 388pm25_x10 = 881pm10_x10 = 881simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 388).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
    2epochuint2563217939962200x000000000000000000000000000000000000000000000000000000006aee35bc
    3pm25_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    4pm10_x10uint256328810x0000000000000000000000000000000000000000000000000000000000000371
    5temp_x10int256322940x0000000000000000000000000000000000000000000000000000000000000126
    6hum_x10uint256325710x000000000000000000000000000000000000000000000000000000000000023b
    7nonceuint256323880x0000000000000000000000000000000000000000000000000000000000000184
    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 0xc4f04acedd55d2e4841e920104fabefd0f7f531e94ef5dad1fd4b7a7ddc54ce1
    s 0x05fb9e43bcf397e82765408f607da349c839fda29cff4d5382c8ec96e0422903
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 388 follows #386, 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": 1793996220,
  "pm25_x10": 881,
  "pm10_x10": 881,
  "temp_x10": 294,
  "hum_x10": 571,
  "nonce": 388,
  "signature": "0xc4f04acedd55d2e4841e920104fabefd0f7f531e94ef5dad1fd4b7a7ddc54ce105fb9e43bcf397e82765408f607da349c839fda29cff4d5382c8ec96e04229031c",
  "simulated": false
}