v0.6.3

zidecar tower refactoring, mempool streaming, zclid daemon

tower service layer

• zebrad client wrapped with tower retry (3x exponential backoff) + 30s timeout
• typed error classification via reqwest methods instead of string matching
• buffer(32) backpressure on concurrent zebrad calls

grpc middleware + module split

• tower-http trace layer for automatic request/response logging
• grpc_service.rs split into 4 domain modules: proofs, blocks, nomt, sync

mempool streaming

• new GetMempoolStream RPC — streams full mempool as compact blocks (height=0)
• client scans locally for privacy (trial decrypt + nullifier check)
• optional server-side cache (--mempool-cache-ttl) for public nodes

zclid wallet daemon

• background daemon keeps wallet synced, serves instant gRPC queries
• dual custody: full spending key (agents) or view-only FVK (zafu extension)
• unix socket for local zcli + tcp with bearer token auth for remote access
• constant-time token comparison, atomic file permissions, core dump disable

deployment

• caddy config template for HA zidecar (h3/quic, gRPC-web CORS, health checks)
• hardened systemd units (syscall filter, W^X, no capabilities)

bug fixes

• fix tree state deserialization for pre-orchard heights (missing finalState)
• fix error variant preservation through tower buffer layer

testing

• integration tests against live zebrad + production wire compatibility

Full Changelog: v0.6.2...v0.6.3