Reading #404
216Poorbkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:03:00 IST
PM2.5
94.8 µg/m³
PM10
94.8 µg/m³
Temperature
29.3 °C
Humidity
53.4 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xccb5cc22577e4eed84c52dd715f4c2cf61e213c7b8e2ea25744f33bb177a14ef
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:04:08 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1793997180nonce = 404pm25_x10 = 948pm10_x10 = 948simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 404).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 1793997180 0x000000000000000000000000000000000000000000000000000000006aee397c 3 pm25_x10 uint256 32 948 0x00000000000000000000000000000000000000000000000000000000000003b4 4 pm10_x10 uint256 32 948 0x00000000000000000000000000000000000000000000000000000000000003b4 5 temp_x10 int256 32 293 0x0000000000000000000000000000000000000000000000000000000000000125 6 hum_x10 uint256 32 534 0x0000000000000000000000000000000000000000000000000000000000000216 7 nonce uint256 32 404 0x0000000000000000000000000000000000000000000000000000000000000194 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 0xb5d1c4d0bf4e6ea79ff6d4ecc92b2001c4f76823cfe83e223b5afd1c2239337ds 0x5d539d10b81ecf4763730949e52621affae7b0d83e3ea99cc60f30ab5863055ev 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 404 follows #403, 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": 1793997180,
"pm25_x10": 948,
"pm10_x10": 948,
"temp_x10": 293,
"hum_x10": 534,
"nonce": 404,
"signature": "0xb5d1c4d0bf4e6ea79ff6d4ecc92b2001c4f76823cfe83e223b5afd1c2239337d5d539d10b81ecf4763730949e52621affae7b0d83e3ea99cc60f30ab5863055e1b",
"simulated": false
}