Ledgerline

Append-only event streams with exactly-once writes, strong ordering, and a tamper-evident hash chain, at the edge.

• Exactly-once appends. Client idempotency keys collapse retries to a single event.
• Strong per-stream ordering. A single-threaded Durable Object serializes every append.
• Tamper-evident audit log. A SHA-256 hash chain you can verify end-to-end in one call.