Reading #469
305Very Poorbkc-sim-05.sim.prananet.eth · cell te7u6q · 7/11/2026, 02:29:00 IST · simulated device
PM2.5
126.8 µg/m³
PM10
237.1 µg/m³
Temperature
28.8 °C
Humidity
66.7 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xfde8033e67d5caa7e7d025409ee631f3e1cabf2bf3334913cef6c3b0d52ca739
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:31:05 IST (3 days after the reading)
- Queryable attributes
- device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397ens = bkc-sim-05.sim.prananet.ethgeohash = te7u6qepoch = 1793998740nonce = 469pm25_x10 = 1268pm10_x10 = 2371simulated = true
- Query that finds this record
from("prananet.reading").where(device = 0x6ba7ec7f9de29074c329cadb667a6f5412419397 && nonce = 469).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 0x6ba7ec7f9de29074c329cadb667a6f5412419397 0x6ba7ec7f9de29074c329cadb667a6f5412419397 2 epoch uint256 32 1793998740 0x000000000000000000000000000000000000000000000000000000006aee3f94 3 pm25_x10 uint256 32 1268 0x00000000000000000000000000000000000000000000000000000000000004f4 4 pm10_x10 uint256 32 2371 0x0000000000000000000000000000000000000000000000000000000000000943 5 temp_x10 int256 32 288 0x0000000000000000000000000000000000000000000000000000000000000120 6 hum_x10 uint256 32 667 0x000000000000000000000000000000000000000000000000000000000000029b 7 nonce uint256 32 469 0x00000000000000000000000000000000000000000000000000000000000001d5 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 0x6ba7ec7f9de29074c329cadb667a6f5412419397 - ✓Step 5
Nonce strictly increases
Nonce 469 follows #468, 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": "0x6ba7ec7f9de29074c329cadb667a6f5412419397",
"ens": "bkc-sim-05.sim.prananet.eth",
"geohash": "te7u6q",
"epoch": 1793998740,
"pm25_x10": 1268,
"pm10_x10": 2371,
"temp_x10": 288,
"hum_x10": 667,
"nonce": 469,
"signature": "0x",
"simulated": true
}