PranaNet
AQI 138
← bkc-01.prananet.eth
← #391#396 →

Reading #395

205Poor

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 01:54:00 IST

PM2.5
91.6 µg/m³
PM10
91.6 µg/m³
Temperature
29.6 °C
Humidity
57.2 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xf3fd0e8e7a02b9c69421dea4453f36f8819f1940653cc38540a5d8da9dcee1c7
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 01:55:10 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793996640nonce = 395pm25_x10 = 916pm10_x10 = 916simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 395).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
    2epochuint2563217939966400x000000000000000000000000000000000000000000000000000000006aee3760
    3pm25_x10uint256329160x0000000000000000000000000000000000000000000000000000000000000394
    4pm10_x10uint256329160x0000000000000000000000000000000000000000000000000000000000000394
    5temp_x10int256322960x0000000000000000000000000000000000000000000000000000000000000128
    6hum_x10uint256325720x000000000000000000000000000000000000000000000000000000000000023c
    7nonceuint256323950x000000000000000000000000000000000000000000000000000000000000018b
    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 0x381be1f128bfc639ab52bae2b4629805852b8b20bac50796f53ee18cc14263cf
    s 0x22e91c789109bc0851b498c8311dc61a95983b438b3d7bd4e948ec72da1c2337
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 395 follows #391, 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": 1793996640,
  "pm25_x10": 916,
  "pm10_x10": 916,
  "temp_x10": 296,
  "hum_x10": 572,
  "nonce": 395,
  "signature": "0x381be1f128bfc639ab52bae2b4629805852b8b20bac50796f53ee18cc14263cf22e91c789109bc0851b498c8311dc61a95983b438b3d7bd4e948ec72da1c23371c",
  "simulated": false
}