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Multi-stage Dockerfile pre-builds all heavy nix dependencies. Runtime image (~8.5GB) at ghcr.io/adklempner/logos-chat-sim:latest includes nix store closure + Rust + cargo-risczero/r0vm + system clang. run_in_docker.sh pulls from GHCR, symlinks pre-built modules, builds sequencer + run_setup from source (~10 min per run). Update vendor/logos-lez-rln to a591645 (rebased onto main with member-expiry merged, single squashed commit). Add INSTRUCTIONS.md with macOS, Linux (native), and Docker instructions.
172 lines
7.4 KiB
Markdown
172 lines
7.4 KiB
Markdown
# Mix + LEZ RLN Chat Simulation
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End-to-end private chat between two logos-chat-module clients over a 4-node mix network with LEZ-backed RLN spam protection.
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Two logoscore instances (sender + receiver) establish an X3DH key agreement via an out-of-band intro bundle, then exchange double-ratchet-encrypted messages routed through 3-hop Sphinx onion routes with per-hop RLN proof generation and verification. Node 0 mounts the rln_gifter service; nodes 1-3 and both chat clients register RLN memberships on-chain via the gifter protocol. The sender publishes via `lightpushPublish(mixify=true)`, the mix exit node verifies the RLN proof before fanning out via gossipsub relay, and the receiver consumes the message via a Waku filter subscription.
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## macOS
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**Prereqs:** nix (with flakes), Docker, cargo-risczero, SSH access to GitHub.
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```bash
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git clone -b feat/logos-delivery git@github.com:adklempner/logos-chat.git
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cd logos-chat && bash simulations/mix_lez_chat/setup_and_run.sh
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```
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First run: ~15-25 min. Re-runs: `bash simulations/mix_lez_chat/run_simulation.sh --fresh` (~5 min).
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## Linux (native)
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**Prereqs:** nix (with flakes), Docker, cargo-risczero, SSH access to GitHub.
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```bash
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git clone -b feat/logos-delivery git@github.com:adklempner/logos-chat.git
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cd logos-chat && bash simulations/mix_lez_chat/setup_and_run.sh
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```
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Same as macOS. On x86_64 Linux this should work out of the box. On aarch64 Linux, guest zkVM binaries must be pre-built on another platform (rzup doesn't support aarch64-linux) and the wallet module nix build needs `RISC0_SKIP_BUILD_KERNELS=1`.
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## Linux (via Docker)
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**Prereqs:** Docker with 24GB RAM allocated.
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```bash
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git clone -b feat/logos-delivery git@github.com:adklempner/logos-chat.git
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cd logos-chat && bash scripts/run_in_docker.sh
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```
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The pre-built image (`ghcr.io/adklempner/logos-chat-sim`) is pulled automatically (~8.5GB download). Guest zkVM binaries must exist on the host from a previous macOS/x86_64 build, or set `GUEST_BINARIES_DIR`.
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Each sim run: ~10 min (clone + sequencer build + sim). To force a local image rebuild: `REBUILD_IMAGE=1 bash scripts/run_in_docker.sh`.
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## Pass criteria
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**ALL 15 CHECKS PASSED** — 4 mix nodes mounted, gifter service, LEZ RLN active, sender+receiver initialized/started/mix-mounted, intro bundle created, messages sent and received.
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## Architecture
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```
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logoscore (per mix node) logoscore (per chat client)
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├── wallet_module (LEZ wallet) ├── wallet_module (LEZ wallet)
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├── liblogos_rln_module (RLN proofs) ├── liblogos_rln_module (RLN proofs)
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└── delivery_module (Waku mix relay) └── chat_module (logos-chat-module)
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├── liblogosdelivery.so ├── chat_module_plugin.so
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└── mix + relay + filter + gifter └── liblogoschat.so
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└── mix client + filter + gifter client
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```
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Node 0 runs the RLN gifter service. Nodes 1-3 register via gifter on startup. Chat clients also register via gifter when `startChat()` runs.
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## Configuration
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Override defaults via environment:
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| Variable | Default | Description |
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| `SIM_NUM_NODES` | `4` | Number of mix relay nodes |
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| `SIM_BASE_TCP_PORT` | `60001` | First node's TCP port (increments per node) |
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| `SIM_BASE_DISC_PORT` | `9001` | First node's discv5 UDP port (increments per node) |
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| `SIM_CLUSTER_ID` | `99` | Waku cluster ID |
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| `SIM_LOG_LEVEL` | `INFO` | Node log level (TRACE, DEBUG, INFO, WARN, ERROR) |
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| `SIM_CHAT_RECV_PORT` | `60010` | Chat receiver TCP port |
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| `SIM_CHAT_SEND_PORT` | `60011` | Chat sender TCP port |
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| `SIM_KADEMLIA_MIN_WAIT` | `30` | Minimum seconds to wait for kademlia propagation |
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| `SIM_RECEIVER_MIN_WAIT` | `15` | Minimum seconds to wait for receiver to join mix |
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| `SIM_DELIVERY_TIMEOUT` | `120` | Max seconds to wait for message delivery |
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Example — fast iteration with verbose logging:
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```bash
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SIM_LOG_LEVEL=TRACE SIM_KADEMLIA_MIN_WAIT=10 SIM_RECEIVER_MIN_WAIT=5 \
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bash simulations/mix_lez_chat/run_simulation.sh --fresh
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```
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## `--fresh` behavior
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When `--fresh` is passed:
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- Kills all existing `logos_host` processes
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- Cleans `/tmp/logos_*` Qt RemoteObjects sockets
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- Removes `.sim_state/` directory
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- Removes sequencer state (`rocksdb/`, `bedrock_signing_key`)
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- Rebuilds and restarts the sequencer
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- Redeploys RLN programs via `run_setup`
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Without `--fresh`, reuses existing sequencer if port 3040 is already bound.
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## Troubleshooting
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**Re-run with fresh state:**
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```bash
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bash simulations/mix_lez_chat/run_simulation.sh --fresh
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```
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**"Sequencer failed to start"** — port 3040 already in use:
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```bash
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kill $(lsof -ti tcp:3040) && bash simulations/mix_lez_chat/run_simulation.sh --fresh
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```
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**"run_setup failed" / "Timeout waiting for account"** — stale guest binaries or wallet state:
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```bash
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rm -rf vendor/logos-lez-rln/lez-rln/methods/guest/target
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rm -f vendor/logos-lez-rln/dev/wallet_config.json vendor/logos-lez-rln/dev/storage.json
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bash simulations/mix_lez_chat/setup_and_run.sh
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```
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**"Sender started FAIL"** — stale Qt RemoteObjects sockets:
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```bash
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rm -f /tmp/logos_*
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bash simulations/mix_lez_chat/run_simulation.sh --fresh
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```
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Docker logs are rescued to `./docker-sim-logs/` on failure.
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## Adapting for other LEZ programs
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This simulation provides a complete mix network infrastructure that other logos modules can reuse for testing. To test your own module:
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### What the sim provides
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- 4 logoscore mix nodes with `delivery_module` (Waku relay + mix + RLN)
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- LEZ sequencer with deployed RLN programs
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- RLN gifter service on node 0
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- Wallet modules for on-chain transactions
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### What you replace
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The chat_module sender/receiver instances (phase 5 of run_simulation.sh). Your module needs:
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1. **A C++ Qt plugin** implementing `PluginInterface` (see `chat_module_plugin.cpp`)
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- `initLogos(LogosAPI*)` — receive the LogosAPI instance
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- `eventResponse(QString, QVariantList)` signal — mandatory per logos-liblogos contract
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- Methods exposed via `LOGOS_METHOD` for logoscore `-c` invocation
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2. **A shared library** with your program logic (like `liblogoschat.so`)
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3. **RLN integration** — wire `setRlnConfig` to pass RLN credentials from the C++ plugin to your library
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4. **EVENT: stderr fallback** — on Linux, Qt signal forwarding from plugin to logoscore doesn't work across the FFI thread boundary. Write event data to stderr in `EVENT:name:data` format (gated by `LOGOS_EVENT_STDERR` env var) for cross-platform reliability.
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### How to stage your module
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```bash
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MDIR=$(mktemp -d)
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mkdir -p "$MDIR/your_module"
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cp your_module_plugin.so "$MDIR/your_module/"
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cp libyour_library.so "$MDIR/your_module/"
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echo '{"name":"your_module","version":"1.0.0","type":"core",...}' > "$MDIR/your_module/manifest.json"
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logoscore -m "$MDIR" \
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-l "liblogos_execution_zone_wallet_module,liblogos_rln_module,your_module" \
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-c "liblogos_execution_zone_wallet_module.open($WALLET_CONFIG,$WALLET_STORAGE)" \
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-c "your_module.init(@config.json)" \
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-c "your_module.start()"
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```
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### Reference
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- `chat_module_plugin.cpp` — complete working example with RLN, gifter, mix, and event emission
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- `delivery_module_plugin.cpp` — more complex example with full RLN fetcher integration
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- `run_simulation.sh` — orchestration, module staging, and verification patterns
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## Logs
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All logs in `simulations/mix_lez_chat/.sim_state/`:
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- `node0.log` – `node3.log` — mix relay nodes
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- `chat_receiver.log` — receiver chat module
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- `chat_sender.log` — sender chat module
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- `sequencer.log` — LEZ sequencer
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