Reading #144
190Moderatebkc-02c.prananet.eth · cell te7u6n · 7/11/2026, 02:39:00 IST
PM2.5
87.0 µg/m³
PM10
87.0 µg/m³
Temperature
not measured
Humidity
not measured
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xffe53ca92f15e165b77ce931f51d4ae7447076854a0f710efe2f884380ffccdf
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:40:07 IST (3 days after the reading)
- Queryable attributes
- device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1ens = bkc-02c.prananet.ethgeohash = te7u6nepoch = 1793999340nonce = 144pm25_x10 = 870pm10_x10 = 870simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 && nonce = 144).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 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 2 epoch uint256 32 1793999340 0x000000000000000000000000000000000000000000000000000000006aee41ec 3 pm25_x10 uint256 32 870 0x0000000000000000000000000000000000000000000000000000000000000366 4 pm10_x10 uint256 32 870 0x0000000000000000000000000000000000000000000000000000000000000366 5 temp_x10 int256 32 0 0x0000000000000000000000000000000000000000000000000000000000000000 6 hum_x10 uint256 32 0 0x0000000000000000000000000000000000000000000000000000000000000000 7 nonce uint256 32 144 0x0000000000000000000000000000000000000000000000000000000000000090 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 0xbb8d40d3acdb2a39ab8873b8180345d3c58b896b9672f39146e02dfe535fec65s 0x4a76285fc96740d5d66f469bc4241cbdf8f20f9c0d6590f08471f016885e15d8v 27recovered … - …Step 4
Compare with the registered device key
registered 0x11d415367d2d3440e5beea30a18ef0fdeb0638d1 - ✓Step 5
Nonce strictly increases
Nonce 144 follows #143, 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": "0x11d415367d2d3440e5beea30a18ef0fdeb0638d1",
"ens": "bkc-02c.prananet.eth",
"geohash": "te7u6n",
"epoch": 1793999340,
"pm25_x10": 870,
"pm10_x10": 870,
"temp_x10": 0,
"hum_x10": 0,
"nonce": 144,
"signature": "0xbb8d40d3acdb2a39ab8873b8180345d3c58b896b9672f39146e02dfe535fec654a76285fc96740d5d66f469bc4241cbdf8f20f9c0d6590f08471f016885e15d81b",
"simulated": false
}