Publish sensor readings to Hedera
Anchor sensor readings on Hedera Hashgraph for immutable verification. Compute a SHA-256 proof locally, then publish a compact proof (node_id, ts, hash) via your backend to a Hedera HCS topic.
Hedera Proof Publisher
Compute → Sign (server) → Anchor
No proof published yet.
How it works
- Client computes a SHA-256 digest of the reading (stable JSON).
- Client POSTs { node_id, ts, hash } to
/api/hedera/publish. - Server (secure) signs and submits the small message to a Hedera HCS topic.
- Server returns topicId and transactionId for verification.