PranaNet
AQI 115
← bkc-01.prananet.eth
← #412#418 →

Reading #413

194Moderate

bkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:12:00 IST

PM2.5
88.2 µg/m³
PM10
88.2 µg/m³
Temperature
24.6 °C
Humidity
55.6 %

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0x2de576d4f70f23c13039ca9fecaca15dd44f9465779dbb285d79fc5230bde3b1
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
10/11/2026, 02:13:25 IST (3 days after the reading)
Queryable attributes
device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997720nonce = 413pm25_x10 = 882pm10_x10 = 882simulated = false
Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 413).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
    2epochuint2563217939977200x000000000000000000000000000000000000000000000000000000006aee3b98
    3pm25_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    4pm10_x10uint256328820x0000000000000000000000000000000000000000000000000000000000000372
    5temp_x10int256322460x00000000000000000000000000000000000000000000000000000000000000f6
    6hum_x10uint256325560x000000000000000000000000000000000000000000000000000000000000022c
    7nonceuint256324130x000000000000000000000000000000000000000000000000000000000000019d
    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 0xcbb1a133bcf08bf6e417183dfcc55b0f2ab9b5e0d24b65aca51b953694653e57
    s 0x0e46ad1fad842284d548b3aaba0e4b9c09846daf4aac2b732fcb0493573e1a92
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0x4379c30ae56431f0485731f6e730ee0084e955c0
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 413 follows #412, 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": 1793997720,
  "pm25_x10": 882,
  "pm10_x10": 882,
  "temp_x10": 246,
  "hum_x10": 556,
  "nonce": 413,
  "signature": "0xcbb1a133bcf08bf6e417183dfcc55b0f2ab9b5e0d24b65aca51b953694653e570e46ad1fad842284d548b3aaba0e4b9c09846daf4aac2b732fcb0493573e1a921c",
  "simulated": false
}