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rpcdb: decomplect into Layer A/B/C topology

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Layer A — wire framing: github.com/luxfi/api/zap (unchanged)
Layer B — service spec: github.com/luxfi/proto/rpcdb (transport-agnostic
   data carriers, was node/proto/zap/rpcdb)
Layer C — service impl + transports: node/db/rpcdb/
   - service.go      transport-neutral Service wrapping database.Database
   - zap_server.go   ZAP transport adapter (default; used by cevm)
   - grpc_server.go  gRPC transport adapter (-tags=grpc)

One Service. Many transport adapters. Adding a transport is a new
adapter file wrapping *Service; storage logic stays in service.go.

Removed (-1390 LOC of duplicate/dead code):
 - node/proto/zap/rpcdb/rpcdb.go (moved to luxfi/proto/rpcdb)
 - node/proto/rpcdb/rpcdb_zap.go (dead HandlerRegistry path, no callers)
 - node/proto/rpcdb/rpcdb_grpc.go (duplicated gRPC server, replaced by
   node/db/rpcdb/grpc_server.go)
 - node/db/rpcdb/db.go (re-export shim, replaced by Service)

Consumers updated to import the canonical adapter at node/db/rpcdb:
 - vms/rpcchainvm/zap/client.go
 - vms/rpcchainvm/zap/client_dbserver_test.go
 - vms/rpcchainvm/zap/cevm_e2e_test.go

go.mod: add `replace github.com/luxfi/proto => ../proto` for in-tree
  development of the central wire-types module.

Tests: db/rpcdb (3/3) + rpcchainvm/zap (4/4 incl. cevm cross-process
e2e — KP_META written via ZAP db channel, no fallback to local zapdb).
This commit is contained in:
Hanzo AI
2026-05-15 15:47:44 -07:00
parent 697b9ccfc3
commit 8efcdff444
13 changed files with 1123 additions and 1390 deletions
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LLM.md
+12 -1
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@@ -284,11 +284,22 @@ go build -tags=grpc # gRPC support (for testing/compatibility)
```
**Key Packages:**
- `github.com/luxfi/api/zap` - Core wire protocol and message types
- `github.com/luxfi/api/zap` - Core wire protocol and message types (Layer A)
- `github.com/luxfi/proto/rpcdb` - rpcdb service spec / data carriers (Layer B)
- `github.com/luxfi/node/db/rpcdb` - rpcdb Service + ZAP/gRPC transport adapters (Layer C)
- `github.com/luxfi/vm/rpc/sender` - p2p.Sender over ZAP/gRPC
- `vms/rpcchainvm/sender/` - Node-side sender implementation
- `vms/platformvm/warp/zwarp/` - ZAP-based warp signing client/server
**rpcdb Layered Topology (post-2026-05 reorg):**
- Layer A — wire framing: `github.com/luxfi/api/zap` (independent module)
- Layer B — rpcdb service spec: `github.com/luxfi/proto/rpcdb` (transport-agnostic data carriers)
- Layer C — rpcdb impl: `node/db/rpcdb/{service.go, grpc_server.go, zap_server.go}`
- `service.go` — transport-neutral `Service` wrapping `database.Database`
- `zap_server.go` (default) — ZAP transport adapter (used by cevm)
- `grpc_server.go` (`-tags=grpc`) — gRPC transport adapter
- One Service, many transport adapters. Adding a transport = new file wrapping `*Service`.
**Wire Protocol Format:**
```
[4 bytes: length][1 byte: message type][payload...]