Reading #507
204Poorbkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:46:00 IST
PM2.5
91.2 µg/m³
PM10
91.2 µg/m³
Temperature
22.5 °C
Humidity
69.6 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0x7c4d830309cddc9d8f7f9dacd83aaed0117906a97c5b3b417bf240b9f92e4538
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 03:47:21 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794003360nonce = 507pm25_x10 = 912pm10_x10 = 912simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 507).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 1794003360 0x000000000000000000000000000000000000000000000000000000006aee51a0 3 pm25_x10 uint256 32 912 0x0000000000000000000000000000000000000000000000000000000000000390 4 pm10_x10 uint256 32 912 0x0000000000000000000000000000000000000000000000000000000000000390 5 temp_x10 int256 32 225 0x00000000000000000000000000000000000000000000000000000000000000e1 6 hum_x10 uint256 32 696 0x00000000000000000000000000000000000000000000000000000000000002b8 7 nonce uint256 32 507 0x00000000000000000000000000000000000000000000000000000000000001fb 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 0xc8016e93a84f8807cfb8109c78d95579a87f80a530c13007ceb762ad3af0027cs 0x3e635d818b5ef7d0fca430a5a3bd93ccfb8a81afab0d44e1fbbd54834f4df209v 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 507 follows #506, 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": 1794003360,
"pm25_x10": 912,
"pm10_x10": 912,
"temp_x10": 225,
"hum_x10": 696,
"nonce": 507,
"signature": "0xc8016e93a84f8807cfb8109c78d95579a87f80a530c13007ceb762ad3af0027c3e635d818b5ef7d0fca430a5a3bd93ccfb8a81afab0d44e1fbbd54834f4df2091b",
"simulated": false
}