PranaNet
AQI 313
← bkc-02b.prananet.eth
← #18#20 →

Reading #19

56Satisfactory

bkc-02b.prananet.eth · cell te7u6n · 6/11/2026, 19:05:00 IST

PM2.5
33.7 µg/m³
PM10
33.7 µg/m³
Temperature
not measured
Humidity
not measured

Arkiv entity

Open in Arkiv explorer ↗
Entity key
0xf5cd94f5d4ee86a03f95bde694c2d3bcd5b36e8fa4c0ed190cd83a553335a66a
Written by (relayer wallet)
0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
Expires
9/11/2026, 19:06:11 IST (3 days after the reading)
Queryable attributes
device = 0xaaf237263e4b6aa36a5db967f1dedeea2617f2eaens = bkc-02b.prananet.ethgeohash = te7u6nepoch = 1793972100nonce = 19pm25_x10 = 337pm10_x10 = 337simulated = false
Query that finds this record
from("prananet.reading").where(device = 0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea && nonce = 19).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
    1deviceaddress200xaaf237263e4b6aa36a5db967f1dedeea2617f2ea0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea
    2epochuint2563217939721000x000000000000000000000000000000000000000000000000000000006aedd784
    3pm25_x10uint256323370x0000000000000000000000000000000000000000000000000000000000000151
    4pm10_x10uint256323370x0000000000000000000000000000000000000000000000000000000000000151
    5temp_x10int2563200x0000000000000000000000000000000000000000000000000000000000000000
    6hum_x10uint2563200x0000000000000000000000000000000000000000000000000000000000000000
    7nonceuint25632190x0000000000000000000000000000000000000000000000000000000000000013
    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 0x8036297b0b92a276c345f726b141a5aaac2b10cfe3ccca4558e819e69f2c044c
    s 0x37c2f988489f97b6f18e8ab30ae130fd8d53351a80f87e5f6d836ec3dc2a542b
    v 28
    recovered …
  4. …
    Step 4

    Compare with the registered device key

    registered 0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea
  5. ✓
    Step 5

    Nonce strictly increases

    Nonce 19 follows #18, 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": "0xaaf237263e4b6aa36a5db967f1dedeea2617f2ea",
  "ens": "bkc-02b.prananet.eth",
  "geohash": "te7u6n",
  "epoch": 1793972100,
  "pm25_x10": 337,
  "pm10_x10": 337,
  "temp_x10": 0,
  "hum_x10": 0,
  "nonce": 19,
  "signature": "0x8036297b0b92a276c345f726b141a5aaac2b10cfe3ccca4558e819e69f2c044c37c2f988489f97b6f18e8ab30ae130fd8d53351a80f87e5f6d836ec3dc2a542b1c",
  "simulated": false
}