PranaNet
AQI 311
← bkc-01.prananet.eth
← #404#406 →

Reading #405

195Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:04:00 IST

PM2.5
88.4 µg/m³
PM10
88.4 µg/m³
Temperature
28.9 °C
Humidity
50.8 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xa0cdaa24134006dbe4a0768741cd8944c805ab8e08d6d1d36c156fda218db8ca
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:05:06 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997240nonce = 405pm25_x10 = 884pm10_x10 = 884simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 405).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
    2epochuint2563217939972400x000000000000000000000000000000000000000000000000000000006aee39b8
    3pm25_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    4pm10_x10uint256328840x0000000000000000000000000000000000000000000000000000000000000374
    5temp_x10int256322890x0000000000000000000000000000000000000000000000000000000000000121
    6hum_x10uint256325080x00000000000000000000000000000000000000000000000000000000000001fc
    7nonceuint256324050x0000000000000000000000000000000000000000000000000000000000000195
    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 0xb3d5b57084f014f6f27cb44f564ebbc90f71a06c51152ca9d35998be72daaeba
    s 0x58d6801dff9e513dcf2fb11b2c2017f09bc5c7a817ca409e76c575d6bd79def2
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 405 follows #404, 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": 1793997240,
  "pm25_x10": 884,
  "pm10_x10": 884,
  "temp_x10": 289,
  "hum_x10": 508,
  "nonce": 405,
  "signature": "0xb3d5b57084f014f6f27cb44f564ebbc90f71a06c51152ca9d35998be72daaeba58d6801dff9e513dcf2fb11b2c2017f09bc5c7a817ca409e76c575d6bd79def21c",
  "simulated": false
}