Reading #459
193Moderatebkc-01.prananet.eth · cell te7u6n · 7/11/2026, 02:58:00 IST
PM2.5
87.9 µg/m³
PM10
87.9 µg/m³
Temperature
21.2 °C
Humidity
70.4 %
Arkiv entity
Open in Arkiv explorer ↗- Entity key
- 0xb291c5a5d2244df84289c7d936bc9395f3b821b935e07481a18e7c531fa98bc0
- Written by (relayer wallet)
- 0x3a1f21f1c6f05efa35bb7178274b41c8873cca67
- Expires
- 10/11/2026, 02:59:07 IST (3 days after the reading)
- Queryable attributes
- device = 0x4379c30ae56431f0485731f6e730ee0084e955c0ens = bkc-01.prananet.ethgeohash = te7u6nepoch = 1794000480nonce = 459pm25_x10 = 879pm10_x10 = 879simulated = false
- Query that finds this record
from("prananet.reading").where(device = 0x4379c30ae56431f0485731f6e730ee0084e955c0 && nonce = 459).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 1794000480 0x000000000000000000000000000000000000000000000000000000006aee4660 3 pm25_x10 uint256 32 879 0x000000000000000000000000000000000000000000000000000000000000036f 4 pm10_x10 uint256 32 879 0x000000000000000000000000000000000000000000000000000000000000036f 5 temp_x10 int256 32 212 0x00000000000000000000000000000000000000000000000000000000000000d4 6 hum_x10 uint256 32 704 0x00000000000000000000000000000000000000000000000000000000000002c0 7 nonce uint256 32 459 0x00000000000000000000000000000000000000000000000000000000000001cb 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 0xf3939535e162080aa4988b42719b371ab946dcc676b19d9d00bf7d2c154d3e5cs 0x33eac0b88986bdc4b2c8978ee643c52241f5bc1e21a9113af833fd8e2406d970v 27recovered … - …Step 4
Compare with the registered device key
registered 0x4379c30ae56431f0485731f6e730ee0084e955c0 - ✓Step 5
Nonce strictly increases
Nonce 459 follows #458, 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": 1794000480,
"pm25_x10": 879,
"pm10_x10": 879,
"temp_x10": 212,
"hum_x10": 704,
"nonce": 459,
"signature": "0xf3939535e162080aa4988b42719b371ab946dcc676b19d9d00bf7d2c154d3e5c33eac0b88986bdc4b2c8978ee643c52241f5bc1e21a9113af833fd8e2406d9701b",
"simulated": false
}