PranaNet
AQI 149
← bkc-01.prananet.eth
← #409#411 →

Reading #410

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:09:00 IST

PM2.5
88.2 µg/m³
PM10
88.2 µg/m³
Temperature
25.8 °C
Humidity
51.4 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x24840e5c76ef9cbc80d61bd4f29296cf0042becb991afc704b00c218a6cab352
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:10:08 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997540nonce = 410pm25_x10 = 882pm10_x10 = 882simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 410).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
    2epochuint2563217939975400x000000000000000000000000000000000000000000000000000000006aee3ae4
    3pm25_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    4pm10_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    5temp_x10int256322580x0000000000000000000000000000000000000000000000000000000000000102
    6hum_x10uint256325140x0000000000000000000000000000000000000000000000000000000000000202
    7nonceuint256324100x000000000000000000000000000000000000000000000000000000000000019a
    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 0xe195360a35f31b453b7507b5060907268d30fb75aa8c11a13757096346e86087
    s 0x58794a83fee2c6fa7dc9e85bc9b366f666c3cf996cdbfb1bac1210db1a26357c
    v 27
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 410 follows #409, 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": 1793997540,
  "pm25_x10": 882,
  "pm10_x10": 882,
  "temp_x10": 258,
  "hum_x10": 514,
  "nonce": 410,
  "signature": "0xe195360a35f31b453b7507b5060907268d30fb75aa8c11a13757096346e8608758794a83fee2c6fa7dc9e85bc9b366f666c3cf996cdbfb1bac1210db1a26357c1b",
  "simulated": false
}