Hash of Wisdom

A TCP server implementing the "Word of Wisdom" concept with proof-of-work challenges to protect against DDoS attacks.

Overview

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.

Quick Start

Prerequisites

• Go 1.24.3+
• Docker (optional)
• Task (optional, but recommended)

Building

# Build server
go build -o hash-of-wisdom ./cmd/server

# Build client
go build -o client ./cmd/client

Running

Using Task (Recommended)

# Most useful command - run all checks
task check

# Start server
task server -- -config config.yaml

# Connect client
task client -- --addr=localhost:8080

# Run tests
task test

# See coverage
task test-coverage

# See all available commands
task --list

Manual Commands

# Start server (uses config.yaml by default)
./hash-of-wisdom

# Or with custom config
./hash-of-wisdom -config /path/to/config.yaml

# Connect with client
./client -addr localhost:8080

# Run tests
go test ./...

Using Docker

# Build image
docker build -t hash-of-wisdom .

# Run container
docker run -p 8080:8080 -p 8081:8081 hash-of-wisdom

Monitoring

• Metrics: http://localhost:8081/metrics (Prometheus format with Go runtime stats)
• Profiling: http://localhost:8081/debug/pprof/

Documentation

Protocol & Implementation

• Protocol Specification - Binary protocol definition
• PoW Algorithm Analysis - Algorithm selection rationale and comparison
• Implementation Plan - Development phases and progress
• Package Structure - Code organization and package responsibilities
• Architecture Choices - Design decisions and patterns

Production Readiness

• Production Readiness Guide - Requirements for production deployment