Reading #305
192Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 00:25:00 IST
PM2.5
87.6 µg/m³
PM10
87.6 µg/m³
Temperature
21.9 °C
Humidity
52.8 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0x38f4ded2d869ec41c24d6ce8a3744d02e9fdefc1b8c15b27bb546a12f66b969c
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 00:26:18 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793991300nonce = 305pm25_x10 = 876pm10_x10 = 876simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 305).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 1793991300 0x000000000000000000000000000000000000000000000000000000006aee2284 3 pm25_x10 uint256 32 876 0x000000000000000000000000000000000000000000000000000000000000036c 4 pm10_x10 uint256 32 876 0x000000000000000000000000000000000000000000000000000000000000036c 5 temp_x10 int256 32 219 0x00000000000000000000000000000000000000000000000000000000000000db 6 hum_x10 uint256 32 528 0x0000000000000000000000000000000000000000000000000000000000000210 7 nonce uint256 32 305 0x0000000000000000000000000000000000000000000000000000000000000131 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 0x745970d53544007a5eef7614655deebdf79ca938b0ed09cdc190948bf128d4ads 0x175e0cb6f99aadd7f16fd3ef175ab6cb00b1f428800f226e45b4f4640ac410d9v 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 305 follows #303, 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": 1793991300,
"pm25_x10": 876,
"pm10_x10": 876,
"temp_x10": 219,
"hum_x10": 528,
"nonce": 305,
"signature": "0x745970d53544007a5eef7614655deebdf79ca938b0ed09cdc190948bf128d4ad175e0cb6f99aadd7f16fd3ef175ab6cb00b1f428800f226e45b4f4640ac410d91b",
"simulated": false
}