Reading #308
191Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:28:00 IST
PM2.5
87.2 µg/m³
PM10
87.2 µg/m³
Temperature
21.7 °C
Humidity
51.3 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xf15cc3b2b3cdf8b9dc8b77bafe9a8478673f6946135f8fae08e64963fc15459c
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 00:29:14 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793991480nonce = 308pm25_x10 = 872pm10_x10 = 872simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 308).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 0x4379c30ae56431f0485731f6e730ee0084e955c0 0x4379c30ae56431f0485731f6e730ee0084e955c0 2 epoch uint256 32 1793991480 0x000000000000000000000000000000000000000000000000000000006aee2338 3 pm25_x10 uint256 32 872 0x0000000000000000000000000000000000000000000000000000000000000368 4 pm10_x10 uint256 32 872 0x0000000000000000000000000000000000000000000000000000000000000368 5 temp_x10 int256 32 217 0x00000000000000000000000000000000000000000000000000000000000000d9 6 hum_x10 uint256 32 513 0x0000000000000000000000000000000000000000000000000000000000000201 7 nonce uint256 32 308 0x0000000000000000000000000000000000000000000000000000000000000134 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 0xca9e84065d150d76a4ccdfa2115381d6359a6fab5c6f07fa8a246203acddef34s 0x5f177c953d99dbc0d7a4348d5625e0a7b2f9a1c6432e0b72c83bbb6d78d971c4v 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 308 follows #306, 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": "0x4379c30ae56431f0485731f6e730ee0084e955c0",
"ens": "bkc-01.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793991480,
"pm25_x10": 872,
"pm10_x10": 872,
"temp_x10": 217,
"hum_x10": 513,
"nonce": 308,
"signature": "0xca9e84065d150d76a4ccdfa2115381d6359a6fab5c6f07fa8a246203acddef345f177c953d99dbc0d7a4348d5625e0a7b2f9a1c6432e0b72c83bbb6d78d971c41b",
"simulated": false
}