86 lines
2.6 KiB
Markdown
86 lines
2.6 KiB
Markdown
# Lattice Roadmap
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## Milestone 1: Single-Node Append-Only Log
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**Goal:** A single node can create, sign, and persist entries to its own log. No networking yet.
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### Deliverables
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- [x] HLC timestamps
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- [x] Node identity (Ed25519 keypair, save/load)
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- [x] Entry signing & verification
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- [x] Log file I/O (append, read, hash verification)
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- [x] SigChain (validate entries before appending)
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- [x] Store (redb) — `kv` + `meta` tables, log replay
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- [ ] Interactive CLI: `init`, `put`, `get`, `delete`, `status`, `quit`
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### Success Criteria
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- Can create a new identity
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- Can append entries to local log
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- Can replay log to reconstruct KV state
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- All operations survive restart
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### Multi-KV Refactoring (before M2)
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Current code assumes single store. Changes needed:
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- [ ] DataDir → support `stores/{uuid}/` subdirectories
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- [ ] SigChain → scoped to (store_id, author_id)
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- [ ] Store → per-store state.db, not global
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- [ ] Log paths → `stores/{uuid}/logs/{author}.log`
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- [ ] Add global meta.db for stores table
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- [ ] Proto: SignedEntry/messages need store_id (UUID)
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- [ ] Proto: Entry needs `parent_hashes` for DAG (not just `prev_hash`)
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- [ ] Store: keys/values → `Vec<u8>` (binary, not String)
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- [ ] Store: KV table value → `Vec<HeadInfo>` for DAG heads
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- [ ] CLI → `create-store`, `list-stores`, `use <store>`
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---
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## Milestone 2: Two-Node Sync
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**Goal:** Two nodes can sync their logs over the network.
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### Deliverables
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- [ ] Store: add `applied_frontiers` table (sync state per author)
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- [ ] VectorClock module (diff, merge, missing entries)
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- [ ] Sync protocol (push missing entries)
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- [ ] Iroh integration (peer discovery, connection)
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- [ ] Multi-author log merging
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- [ ] CLI: `peers`, `connect`/`join` commands
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### Success Criteria
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- Node A writes, Node B syncs, both have same state
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- Works offline-first (sync when connected)
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---
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## Milestone 3: Multi-Node Mesh
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**Goal:** N nodes form a gossip mesh with watermark consensus.
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### Deliverables
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- [ ] Gossip protocol
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- [ ] Watermark tracking & log pruning
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- [ ] Node invitation (sigchain membership)
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- [ ] Conflict detection (LWW resolution)
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---
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## Future
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- Mobile (iOS/Android) clients
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- Key rotation
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- Secure storage (Keychain, TPM)
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- Snapshots for fast bootstrap
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- FUSE filesystem mount
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- Note: FUSE requires u64 inode numbers → maintain `BiMap<u64, Hash>` in redb
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- Merkle-ized State
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- state.db as Merkle tree with signed root hash
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- O(1) sync checks (compare root), efficient binary-search diffing
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- Light clients: fetch value + Merkle proof, verify without full state
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- Trade-off: write amplification, requires deterministic tree (Patricia Trie / Merkle Search Tree)
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