Reading #426
193Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:25:00 IST
PM2.5
88.0 µg/m³
PM10
88.0 µg/m³
Temperature
22.3 °C
Humidity
63.5 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0x753b99348f1895d4e2ab11d847cfa12e69fa2212bc3c0d6b1be441c2e6183fe0
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:26:10 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793998500nonce = 426pm25_x10 = 880pm10_x10 = 880simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 426).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 1793998500 0x000000000000000000000000000000000000000000000000000000006aee3ea4 3 pm25_x10 uint256 32 880 0x0000000000000000000000000000000000000000000000000000000000000370 4 pm10_x10 uint256 32 880 0x0000000000000000000000000000000000000000000000000000000000000370 5 temp_x10 int256 32 223 0x00000000000000000000000000000000000000000000000000000000000000df 6 hum_x10 uint256 32 635 0x000000000000000000000000000000000000000000000000000000000000027b 7 nonce uint256 32 426 0x00000000000000000000000000000000000000000000000000000000000001aa 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 0x8783c65ad497df02daba3dcb98440e66d08005e82a70a22cb7a331e98ae88528s 0x1cfdac6d57d28bad95950e780436789e3cb7014e079e3ecf8beb8955623e297av 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 426 follows #425, 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": 1793998500,
"pm25_x10": 880,
"pm10_x10": 880,
"temp_x10": 223,
"hum_x10": 635,
"nonce": 426,
"signature": "0x8783c65ad497df02daba3dcb98440e66d08005e82a70a22cb7a331e98ae885281cfdac6d57d28bad95950e780436789e3cb7014e079e3ecf8beb8955623e297a1b",
"simulated": false
}