PranaNet
AQI 61
← bkc-01.prananet.eth
← #513#525 →

Reading #524

205Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 04:04:00 IST

PM2.5
91.5 µg/m³
PM10
91.5 µg/m³
Temperature
22.4 °C
Humidity
69.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xe13024330b013d2497c9524e881666388766a5fb754759ae98f64a6c91e61ea0
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 04:05:38 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794004440nonce = 524pm25_x10 = 915pm10_x10 = 915simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 524).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
    2epochuint2563217940044400x000000000000000000000000000000000000000000000000000000006aee55d8
    3pm25_x10uint256329150x0000000000000000000000000000000000000000000000000000000000000393
    4pm10_x10uint256329150x0000000000000000000000000000000000000000000000000000000000000393
    5temp_x10int256322240x00000000000000000000000000000000000000000000000000000000000000e0
    6hum_x10uint256326940x00000000000000000000000000000000000000000000000000000000000002b6
    7nonceuint256325240x000000000000000000000000000000000000000000000000000000000000020c
    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 0x5ef110d743b4f404d0b492efe34821f346645c55cd9c4792c2f2b978f9bcd741
    s 0x2f377a2636a0ff49b5e3e92c050b938367331972aa4e25ad0e5e40c356f97899
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 524 follows #513, 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": 1794004440,
  "pm25_x10": 915,
  "pm10_x10": 915,
  "temp_x10": 224,
  "hum_x10": 694,
  "nonce": 524,
  "signature": "0x5ef110d743b4f404d0b492efe34821f346645c55cd9c4792c2f2b978f9bcd7412f377a2636a0ff49b5e3e92c050b938367331972aa4e25ad0e5e40c356f978991c",
  "simulated": false
}