Reading #447
302Very Poorbkc-sim-01.sim.prananet.eth · cell te7u6n · 7/11/2026, 02:07:00 IST · simulated device
PM2.5
122.4 µg/m³
PM10
221.5 µg/m³
Temperature
28.8 °C
Humidity
62.8 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xbbd12f692c47919f70124951a281a36339fe204e91701898fbfb31f2e6f0d870
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:09:04 IST (3 days after the reading)
- Queryable attributes
- device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6ens = bkc-sim-01.sim.prananet.ethgeohash = te7u6nepoch = 1793997420nonce = 447pm25_x10 = 1224pm10_x10 = 2215simulated = true
- Query that finds this record
from("prananet.reading").where(device = 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 && nonce = 447).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.
- ✓Step 1
Rebuild the 264-byte message
# Field Type Bytes Value Packed hex 1 device address 20 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 2 epoch uint256 32 1793997420 0x000000000000000000000000000000000000000000000000000000006aee3a6c 3 pm25_x10 uint256 32 1224 0x00000000000000000000000000000000000000000000000000000000000004c8 4 pm10_x10 uint256 32 2215 0x00000000000000000000000000000000000000000000000000000000000008a7 5 temp_x10 int256 32 288 0x0000000000000000000000000000000000000000000000000000000000000120 6 hum_x10 uint256 32 628 0x0000000000000000000000000000000000000000000000000000000000000274 7 nonce uint256 32 447 0x00000000000000000000000000000000000000000000000000000000000001bf 8 chainId uint256 32 11155111 0x0000000000000000000000000000000000000000000000000000000000aa36a7 9 readingsContract address 20 0x9192Fc053e1493EB2B7355192aa3F8e57AAE01d8 0x9192fc053e1493eb2b7355192aa3f8e57aae01d8 abi.encodePacked, no padding between fields. chainId and contract stop replay on other chains. Total: 264 bytes. - …Step 2
Hash it with keccak256
… - …Step 3
Recover the signer from the EIP-191 signature
r 0xs 0xv NaNrecovered … - …Step 4
Compare with the registered device key
registered 0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6 - ✓Step 5
Nonce strictly increases
Nonce 447 follows #446, so this reading can't be replayed. - ✓Step 6
Cross-checked against neighbours
Not flagged. The value agrees with neighbouring devices within the verifier's threshold.
Raw reading JSON
{
"device": "0xe8cd0141e98eee436fdbd4bd6e2a11914182b2a6",
"ens": "bkc-sim-01.sim.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793997420,
"pm25_x10": 1224,
"pm10_x10": 2215,
"temp_x10": 288,
"hum_x10": 628,
"nonce": 447,
"signature": "0x",
"simulated": true
}