Reading #472
194Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 03:11:00 IST
PM2.5
88.1 µg/m³
PM10
88.1 µg/m³
Temperature
22.2 °C
Humidity
70.6 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0x754f8219552bfe21fd74afe6ef8cc3781c40e274a426153f6e4276d38df9fb3d
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 03:12:08 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794001260nonce = 472pm25_x10 = 881pm10_x10 = 881simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 472).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 1794001260 0x000000000000000000000000000000000000000000000000000000006aee496c 3 pm25_x10 uint256 32 881 0x0000000000000000000000000000000000000000000000000000000000000371 4 pm10_x10 uint256 32 881 0x0000000000000000000000000000000000000000000000000000000000000371 5 temp_x10 int256 32 222 0x00000000000000000000000000000000000000000000000000000000000000de 6 hum_x10 uint256 32 706 0x00000000000000000000000000000000000000000000000000000000000002c2 7 nonce uint256 32 472 0x00000000000000000000000000000000000000000000000000000000000001d8 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 0x8c42a59378e98f730b9c6064295aabe9ba1e01880c4dd697f1a6f876920fbf3es 0x3e2de8a2f37cc052475f7caf731ffb5e3a25a8e9ce522ff35da88be9e3b0bd31v 28recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 472 follows #470, 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": 1794001260,
"pm25_x10": 881,
"pm10_x10": 881,
"temp_x10": 222,
"hum_x10": 706,
"nonce": 472,
"signature": "0x8c42a59378e98f730b9c6064295aabe9ba1e01880c4dd697f1a6f876920fbf3e3e2de8a2f37cc052475f7caf731ffb5e3a25a8e9ce522ff35da88be9e3b0bd311c",
"simulated": false
}