88 lines
2.5 KiB
Markdown
88 lines
2.5 KiB
Markdown
# Hash of Wisdom
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A TCP server implementing the "Word of Wisdom" concept with proof-of-work challenges to protect against DDoS attacks.
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## Overview
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The Hash of Wisdom server requires clients to solve computational puzzles (proof-of-work) before receiving wise quotes. This approach prevents spam and DDoS attacks by requiring clients to invest CPU time for each request.
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## Quick Start
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### Prerequisites
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- Go 1.24.3+
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- Docker (optional)
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### Building
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```bash
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# Build server
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go build -o hash-of-wisdom ./cmd/server
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# Build client
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go build -o client ./cmd/client
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```
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### Running
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```bash
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# Start server (uses config.yaml by default)
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./hash-of-wisdom
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# Or with custom config
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./hash-of-wisdom -config /path/to/config.yaml
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# Connect with client
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./client -addr localhost:8080
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```
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### Using Docker
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```bash
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# Build image
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docker build -t hash-of-wisdom .
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# Run container
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docker run -p 8080:8080 -p 8081:8081 hash-of-wisdom
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```
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### Monitoring
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- Metrics: http://localhost:8081/metrics (Prometheus format with Go runtime stats)
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- Profiling: http://localhost:8081/debug/pprof/
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## Documentation
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### Protocol & Implementation
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- [Protocol Specification](docs/PROTOCOL.md) - Binary protocol definition
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- [Implementation Plan](docs/IMPLEMENTATION.md) - Development phases and progress
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- [Package Structure](docs/PACKAGES.md) - Code organization and package responsibilities
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- [Architecture Choices](docs/ARCHITECTURE.md) - Design decisions and patterns
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### Production Readiness
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- [Production Readiness Guide](docs/PRODUCTION_READINESS.md) - Requirements for production deployment
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## Algorithm Choice
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The server uses **SHA-256 based proof-of-work** with leading zero bits difficulty:
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- **Why SHA-256**: Cryptographically secure, well-tested, hardware-optimized
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- **Leading Zero Bits**: Simple difficulty scaling, easy verification
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- **HMAC Authentication**: Prevents challenge tampering and replay attacks
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- **Configurable Difficulty**: Adaptive to different threat levels (4-30 bits)
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This approach provides strong DDoS protection while remaining computationally reasonable for legitimate clients.
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## Current Status
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✅ **Complete**: Core functionality, TCP server, client, metrics, containerization
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🔄 **In Progress**: Documentation (Phase 9)
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📋 **Planned**: See [Production Readiness Guide](docs/PRODUCTION_READINESS.md) for production deployment requirements
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## Testing
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```bash
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# Run all tests
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go test ./...
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# Run integration tests
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go test ./test/integration/...
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# Benchmarks
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go test -bench=. ./internal/pow/...
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```
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