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⚡ SlotStream

A polyglot, production-grade real-time observability platform for the Solana blockchain.

SlotStream streams blocks, transactions, wallet activity, and program logs directly off Solana’s WebSocket subscriptions — no polling, sub-second latency — and turns that raw firehose into dashboards, alerts, and historical analytics.

图片：License: MIT 图片：Rust 图片：Go 图片：TypeScript 图片：Python 图片：Anchor 图片：Docker 图片：CI 图片：PRs Welcome

---

📚 Table of Contents

• Overview
• Why SlotStream
• Architecture
• Monorepo Structure
• Services
  • engine (Rust)
  • api (Go)
  • dashboard (TypeScript / React)
  • analytics (Python)
  • alerting (Node.js)
  • contracts (Rust / Anchor)
• Quick Start (Docker Compose)
• Local Development (per service)
• Configuration
• API Reference
• Data Flow
• Testing
• Deployment
• CI/CD
• Performance
• Security
• Roadmap
• Contributing
• License
• Acknowledgments

---

Overview

Solana produces a new block roughly every 400ms. Most tooling reacts to this by polling REST endpoints, which is slow, rate-limited, and wasteful. SlotStream instead treats the chain as a live event stream: every slot, account change, and program log is picked up the moment it’s emitted and pushed through a typed pipeline into dashboards, alert channels, and a queryable historical store.

The project is deliberately polyglot — each service is written in the language best suited to its job, rather than forcing one runtime to do everything:

Concern	Language	Why
High-throughput WebSocket ingestion	Rust	Zero-cost abstractions, predictable latency under load
Public API / auth / rate limiting	Go	Simple concurrency model, fast cold starts, easy to operate
Dashboard UI	TypeScript / React	Best-in-class ecosystem for real-time UI
Historical analysis & anomaly detection	Python	Pandas/NumPy/scikit-learn ecosystem
Alerting & webhook fan-out	Node.js	Lightweight, huge integration ecosystem (Discord.js, Telegraf)
On-chain registry program	Rust / Anchor	Native Solana program development

---

🎯 Why SlotStream

• No polling, ever. Every component subscribes; nothing loops on a REST endpoint.
• Composable services, not a monolith — run only the pieces you need.
• Typed contracts between services via Protobuf, so the Rust engine, Go API, and TypeScript dashboard all agree on shapes.
• Built to run in production, not just a demo — includes health checks, structured logging, metrics export, and horizontal scaling guidance.

---

🏗 Architecture

                                   ┌────────────────────────┐
                                   │      Solana RPC          │
                                   │  (Helius / QuickNode /   │
                                   │   self-hosted validator) │
                                   └────────────┬─────────────┘
                                                │ WebSocket
                                                ▼
                                   ┌────────────────────────┐
                                   │   engine (Rust)          │
                                   │  slot/account/log         │
                                   │  subscriptions, decoding, │
                                   │  backpressure-aware queue │
                                   └────────────┬─────────────┘
                                                │ gRPC / Protobuf
                     ┌──────────────────────────┼──────────────────────────┐
                     ▼                          ▼                          ▼
          ┌────────────────────┐   ┌────────────────────┐   ┌────────────────────┐
          │   api (Go)           │   │  alerting (Node.js)  │   │  analytics (Python) │
          │  REST/GraphQL,       │   │  Discord/Telegram/   │   │  anomaly detection,  │
          │  auth, rate limiting │   │  custom webhooks     │   │  batch aggregation   │
          └──────────┬──────────┘   └────────────────────┘   └──────────┬──────────┘
                     │                                                   │
                     ▼                                                   ▼
          ┌────────────────────┐                              ┌────────────────────┐
          │ dashboard (TS/React) │                              │  Postgres/Timescale  │
          │  live charts, feeds   │                              │  historical storage   │
          └────────────────────┘                              └────────────────────┘

                                   ┌────────────────────────┐
                                   │  contracts (Anchor/Rust)  │
                                   │  optional on-chain event  │
                                   │  registry / attestations  │
                                   └────────────────────────┘

---

📁 Monorepo Structure

slotstream/
├── engine/                     # Rust — core WebSocket ingestion & decoding
│   ├── src/
│   │   ├── subscriptions/
│   │   ├── decoders/
│   │   └── queue/
│   ├── benches/                # Criterion benchmarks
│   ├── tests/
│   ├── Cargo.toml
│   ├── Cargo.lock
│   ├── CHANGELOG.md
│   └── Dockerfile
│
├── api/                        # Go — public API gateway
│   ├── cmd/server/
│   ├── internal/
│   │   ├── handlers/
│   │   ├── auth/
│   │   └── ratelimit/
│   ├── go.mod
│   ├── go.sum
│   ├── CHANGELOG.md
│   └── Dockerfile
│
├── dashboard/                   # TypeScript / React — live UI
│   ├── src/
│   │   ├── components/
│   │   ├── hooks/
│   │   └── ws/
│   ├── public/
│   ├── package.json
│   ├── package-lock.json
│   ├── tsconfig.json
│   ├── .eslintrc.cjs
│   ├── CHANGELOG.md
│   └── Dockerfile
│
├── analytics/                    # Python — historical & anomaly detection
│   ├── slotstream_analytics/
│   │   ├── pipelines/
│   │   ├── models/
│   │   └── notebooks/
│   ├── tests/
│   ├── pyproject.toml
│   ├── requirements-dev.txt
│   ├── CHANGELOG.md
│   └── Dockerfile
│
├── alerting/                     # Node.js — notification fan-out
│   ├── src/
│   │   ├── channels/
│   │   └── rules/
│   ├── package.json
│   ├── CHANGELOG.md
│   └── Dockerfile
│
├── contracts/                     # Rust / Anchor — on-chain program
│   ├── programs/slotstream_registry/
│   ├── tests/
│   ├── Anchor.toml
│   └── CHANGELOG.md
│
├── proto/                         # Shared Protobuf schemas (engine ↔ api ↔ dashboard)
│   └── slotstream.proto
│
├── infra/                         # Deployment
│   ├── docker-compose.yml
│   ├── docker-compose.staging.yml
│   ├── k8s/
│   ├── terraform/
│   └── helm/
│
├── scripts/                       # Repo-wide dev/ops tooling
│   ├── bootstrap.sh                # one-shot local env setup
│   ├── release.sh                  # cross-service version bump + tag
│   ├── seed-db.sh
│   └── check-env.sh
│
├── docs/                          # Extended documentation
│   ├── architecture/
│   │   └── adr/                    # Architecture Decision Records
│   │       ├── 0001-polyglot-services.md
│   │       ├── 0002-protobuf-contracts.md
│   │       └── 0003-timescaledb-for-history.md
│   ├── openapi.yaml
│   └── runbooks/                   # on-call operational runbooks
│
├── examples/                      # Minimal usage examples per service
│   ├── watch-wallet.sh
│   └── graphql-queries.md
│
├── .github/
│   ├── workflows/                  # CI/CD pipelines (per-service + release)
│   ├── ISSUE_TEMPLATE/
│   │   ├── bug_report.md
│   │   └── feature_request.md
│   ├── PULL_REQUEST_TEMPLATE.md
│   ├── CODEOWNERS
│   └── dependabot.yml
│
├── .vscode/                        # Shared editor settings (optional, gitignored by default)
├── .editorconfig
├── .gitignore
├── .dockerignore
├── .pre-commit-config.yaml
├── .nvmrc
├── .env.example
├── Makefile                        # make dev / make test-all / make release
├── CHANGELOG.md                    # root-level, aggregates per-service releases
├── CODE_OF_CONDUCT.md
├── CONTRIBUTING.md
├── SECURITY.md
├── LICENSE
├── VERSION
└── README.md

Root-level files at a glance

File	Purpose
CODEOWNERS	Auto-assigns reviewers per directory (e.g. /engine/ → Rust maintainers)
dependabot.yml	Automated dependency update PRs across all five package ecosystems
.pre-commit-config.yaml	Runs formatters/linters (rustfmt, gofmt, eslint, black) before every commit
CHANGELOG.md	Root-level changelog aggregating notable changes across all services, Keep a Changelog format
SECURITY.md	Vulnerability disclosure policy and supported version table
CODE_OF_CONDUCT.md	Contributor Covenant v2.1
VERSION	Current release version, read by scripts/release.sh for tagging
Makefile	Single entrypoint for common tasks across all six services (make test-all, make lint-all, make dev)
docs/architecture/adr/	Architecture Decision Records — the why behind major structural choices, not just the what
docs/runbooks/	Step-by-step operational guides for on-call (e.g. “engine stopped receiving slot updates”)

---

🧩 Services

1. engine — Rust

The core ingestion layer. Opens and maintains persistent WebSocket subscriptions to Solana RPC (slotSubscribe, accountSubscribe, logsSubscribe, programSubscribe), decodes raw payloads, and republishes typed events over gRPC to downstream consumers.

• Async runtime: tokio
• WebSocket client: tokio-tungstenite
• Solana SDK: solana-client, solana-sdk
• Backpressure-aware bounded channel to prevent memory blowup under bursty load
• Automatic reconnect with exponential backoff on RPC disconnects

2. api — Go

The public-facing gateway. Exposes REST and GraphQL endpoints over data produced by engine, handles authentication (API keys / JWT), and enforces per-client rate limits.

• HTTP framework: chi
• GraphQL: gqlgen
• Auth: JWT + API key middleware
• Structured logging: zap

3. dashboard — TypeScript / React

The live UI. Connects to api’s WebSocket relay and renders real-time feeds, charts, and alerts.

• Framework: React + Vite
• State/data: React Query + a lightweight WebSocket hook
• Charts: recharts
• Styling: Tailwind CSS

4. analytics — Python

Batch and near-real-time analysis over data persisted by engine/api: rolling TPS baselines, skip-rate trend detection, and anomaly flags (e.g., sudden liquidity pulls, wallet clustering).

• Data: pandas, numpy
• Modeling: scikit-learn
• Scheduling: celery + Redis for periodic jobs
• Notebooks in analytics/slotstream_analytics/notebooks/ for exploratory work

5. alerting — Node.js

Subscribes to rule-matched events and fans them out to Discord, Telegram, or arbitrary webhooks.

• discord.js for Discord integration
• telegraf for Telegram bots
• Rule engine: simple declarative YAML rules matched against incoming event streams

6. contracts — Rust / Anchor

An optional on-chain program that can record attestations or registry entries on-chain — useful if you want tamper-evident logging of specific tracked events rather than only off-chain storage.

• Framework: Anchor
• Tests: TypeScript + anchor-bankrun for fast local test runs

---

🚀 Quick Start (Docker Compose)

The fastest way to run the full stack locally:

git clone https://github.com//slotstream.git
cd slotstream
cp .env.example .env   # fill in your RPC endpoint and secrets
docker compose -f infra/docker-compose.yml up --build

This brings up:

Service	Port
engine (gRPC)	50051
api (REST/GraphQL)	8080
dashboard	3000
analytics (worker, no exposed port)	—
alerting (worker, no exposed port)	—
Postgres/TimescaleDB	5432
Redis	6379

Open http://localhost:3000 once containers are healthy.

---

🛠 Local Development (per service)

engine (Rust)

cd engine
cargo build
cargo run

Requires Rust >= 1.75 (rustup update stable).

api (Go)

cd api
go mod download
go run ./cmd/server

Requires Go >= 1.22.

dashboard (TypeScript / React)

cd dashboard
npm install
npm run dev

Requires Node.js >= 18.

analytics (Python)

cd analytics
python -m venv .venv && source .venv/bin/activate
pip install -e .
python -m slotstream_analytics.pipelines.run

Requires Python >= 3.11.

alerting (Node.js)

cd alerting
npm install
npm run start

contracts (Anchor / Rust)

cd contracts
anchor build
anchor test

Requires Anchor CLI >= 0.30 and Solana CLI >= 1.18.

---

⚙️ Configuration

Root-level .env (referenced by docker-compose.yml):

# Solana RPC
SOLANA_WS_ENDPOINT=wss://your-rpc-provider.com/ws
SOLANA_RPC_ENDPOINT=https://your-rpc-provider.com

# Watch targets (optional, comma-separated)
WATCH_ADDRESSES=
WATCH_PROGRAM_IDS=

# Datastore
DATABASE_URL=postgres://slotstream:slotstream@postgres:5432/slotstream
REDIS_URL=redis://redis:6379

# Alerting
DISCORD_WEBHOOK_URL=
TELEGRAM_BOT_TOKEN=

# API
JWT_SECRET=
API_RATE_LIMIT_PER_MIN=120

# Misc
LOG_LEVEL=info

Each service also supports a local .env inside its own directory for service-specific overrides during development.

---

📡 API Reference

Base URL (local): http://localhost:8080

Method	Endpoint	Description
GET	/v1/slots/latest	Latest processed slot and finality status
GET	/v1/slots/stream	WebSocket relay of live slot events
GET	/v1/accounts/{address}	Current tracked state for a watched address
GET	/v1/accounts/{address}/events	Historical event feed for an address
GET	/v1/programs/{programId}/logs	Recent logs for a tracked program
GET	/v1/metrics/network	Rolling TPS, average slot time, skip rate
POST	/v1/webhooks	Register a webhook alert rule
GET	/graphql	GraphQL playground / endpoint

Full OpenAPI spec: docs/openapi.yaml (generated from api/).

---

🔄 Data Flow

1. engine opens WebSocket subscriptions to the configured Solana RPC.
2. Raw events are decoded into typed Protobuf messages (schema in proto/slotstream.proto).
3. Events are published over gRPC to api, alerting, and analytics simultaneously.
4. api relays live events to dashboard over WebSocket and serves historical queries from Postgres/TimescaleDB.
5. alerting matches events against declarative rules and dispatches to Discord/Telegram/webhooks.
6. analytics runs scheduled jobs (via Celery) to compute rolling baselines and flag anomalies, writing results back to Postgres for api to serve.

---

✅ Testing

Service	Command	Framework
engine	cargo test	Rust built-in test harness
api	go test ./...	Go built-in testing
dashboard	npm run test	Vitest + React Testing Library
analytics	pytest	Pytest
alerting	npm run test	Jest
contracts	anchor test	Anchor + anchor-bankrun

Run everything at once from the repo root:

make test-all

---

🚢 Deployment

• Docker: each service ships its own Dockerfile; infra/docker-compose.yml covers local/staging use.
• Kubernetes: manifests in infra/k8s/ (Deployments, Services, HPA for engine and api).
• Terraform: infra/terraform/ provisions managed Postgres, Redis, and container hosting on your cloud provider of choice.

# Example: deploy to an existing k8s cluster
kubectl apply -f infra/k8s/

---

🔁 CI/CD

GitHub Actions workflows in .github/workflows/:

• engine-ci.yml — cargo fmt --check, clippy, cargo test
• api-ci.yml — go vet, golangci-lint, go test
• dashboard-ci.yml — eslint, tsc --noEmit, vitest
• analytics-ci.yml — ruff, pytest
• contracts-ci.yml — anchor build, anchor test
• docker-publish.yml — builds and pushes images on tagged releases

---

📊 Performance

Indicative numbers from internal load testing against mainnet-beta via a dedicated RPC provider (your results will vary by provider and network conditions):

Metric	Value
Ingestion latency (slot emit → engine processed)	~15-40ms
End-to-end latency (chain → dashboard render)	~80-150ms
Sustained events/sec handled by engine	5,000+
api P99 latency under 500 req/s	< 60ms

---

🔐 Security

• No private keys are ever required for read-only streaming — engine only subscribes to public chain data.
• contracts operations that sign/send transactions use a separate, explicitly-scoped keypair — never reuse a wallet key across services.
• Secrets are loaded from environment variables only; nothing is committed to the repo. See .env.example.
• Report vulnerabilities privately per SECURITY.md rather than opening a public issue.

---

🗺 Roadmap

• Multi-RPC failover and automatic subscription rebalancing in engine
• Historical replay mode for post-mortem incident analysis
• Prometheus/Grafana exporter for engine and api metrics
• DEX pool price streaming (Raydium/Orca) as a first-class event type
• Public hosted demo environment
• gRPC-Web support so dashboard can talk to engine directly for lower-latency views

---

🤝 Contributing

Contributions are welcome across any of the six services. Please open an issue to discuss significant changes before submitting a PR.

1. Fork the repository
2. Create a feature branch (git checkout -b feat/your-feature)
3. Make your changes in the relevant service directory
4. Run that service’s test suite (see Testing)
5. Commit using Conventional Commits (feat:, fix:, docs:, etc.)
6. Open a Pull Request

See CONTRIBUTING.md for full guidelines, including per-language style conventions.

---

📄 License

Distributed under the MIT License. See LICENSE for details.

---

🙏 Acknowledgments

• Solana Labs for the core protocol
• Anchor for on-chain program tooling
• Helius / QuickNode for RPC infrastructure
• The maintainers of tokio, chi, gqlgen, and pandas — the backbone of this project’s four backend languages