Reading #89
55Satisfactorybkc-02.prananet.eth · cell te7u6n · 6/11/2026, 18:12:00 IST
PM2.5
33.0 µg/m³
PM10
33.0 µg/m³
Temperature
not measured
Humidity
not measured
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xe74c7b3f5dd61cbc55955080f8c00aabc9ca363c449b438dd2a29e3c95bbcb1a
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 9/11/2026, 18:13:11 IST (3 days after the reading)
- Queryable attributes
- device = 0x0b715555721a00cce73e03efb239db39a5e313b2ens = bkc-02.prananet.ethgeohash = te7u6nepoch = 1793968920nonce = 89pm25_x10 = 330pm10_x10 = 330simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x0b715555721a00cce73e03efb239db39a5e313b2 && nonce = 89).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 0x0b715555721a00cce73e03efb239db39a5e313b2 0x0b715555721a00cce73e03efb239db39a5e313b2 2 epoch uint256 32 1793968920 0x000000000000000000000000000000000000000000000000000000006aedcb18 3 pm25_x10 uint256 32 330 0x000000000000000000000000000000000000000000000000000000000000014a 4 pm10_x10 uint256 32 330 0x000000000000000000000000000000000000000000000000000000000000014a 5 temp_x10 int256 32 0 0x0000000000000000000000000000000000000000000000000000000000000000 6 hum_x10 uint256 32 0 0x0000000000000000000000000000000000000000000000000000000000000000 7 nonce uint256 32 89 0x0000000000000000000000000000000000000000000000000000000000000059 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 0x90a8480e0c1e3e88619e78e47542ef01f6579675a6eba810b9b18bfa9ef7bad7s 0x0d64d3e950979c52ecc8bf77df1acbdd27bd11ada0d4dd25f5f04918ebcad6b0v 27recovered … - …Step 4
Compare with the registered device key
registered 0x0b715555721a00cce73e03efb239db39a5e313b2 - ✓Step 5
Nonce strictly increases
Nonce 89 follows #88, 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": "0x0b715555721a00cce73e03efb239db39a5e313b2",
"ens": "bkc-02.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793968920,
"pm25_x10": 330,
"pm10_x10": 330,
"temp_x10": 0,
"hum_x10": 0,
"nonce": 89,
"signature": "0x90a8480e0c1e3e88619e78e47542ef01f6579675a6eba810b9b18bfa9ef7bad70d64d3e950979c52ecc8bf77df1acbdd27bd11ada0d4dd25f5f04918ebcad6b01b",
"simulated": false
}