feat: project setup

server/.gitignore

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+# Compiled class file
+*.class
+
+# Log files
+*.log
+logs/
+*.log.*
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# Virtual machine crash logs
+hs_err_pid*
+replay_pid*
+
+# Gradle
+.gradle/
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+# Gradle Wrapper
+!gradle/wrapper/gradle-wrapper.properties
+
+# IntelliJ IDEA
+.idea/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+# Eclipse
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+# NetBeans
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+# VS Code
+.vscode/
+
+# Mac
+.DS_Store
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+
+# Linux
+*~
+
+# Temporary files
+*.tmp
+*.temp
+*.swp
+*.swo
+*~
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# Environment variables
+.env
+.env.local
+.env.development
+.env.test
+.env.production
+
+# Docker
+.dockerignore
+docker-compose.override.yml
+
+# Application specific
+application-local.conf
+application-dev.conf
+application-prod.conf
+
+# Secrets
+secrets/
+*.key
+*.pem
+*.p12
+*.jks
+
+# Test results
+test-results/
+coverage/
+*.coverage
+
+# Node modules (if any frontend tools)
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Python (if any scripts)
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+env/
+venv/
+ENV/
+
+# Backup files
+*.bak
+*.backup
+*.old
+
+# Cache directories
+.cache/
+.tmp/
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Coverage directory used by tools like istanbul
+coverage/
+*.lcov
+
+# Dependency directories
+jspm_packages/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# parcel-bundler cache (https://parceljs.org/)
+.parcel-cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Storybook build outputs
+.out
+.storybook-out
+
+# Temporary folders
+tmp/
+temp/
+
+# Editor directories and files
+.vscode/
+!.vscode/extensions.json
+.idea
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# CCoin specific
+wallet_data/
+blockchain_data/
+mining_cache/
+transaction_pool/
+
+# ComputerCraft
+cc/data/
+cc/logs/
+cc/*.log
+

server/Dockerfile

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+# Multi-stage build for Java 24
+FROM openjdk:24-jdk-slim AS builder
+
+# Install required packages
+RUN apt-get update && apt-get install -y \
+    curl \
+    unzip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Copy gradle wrapper and build files
+COPY gradle/ gradle/
+COPY gradlew .
+COPY gradle.properties .
+COPY settings.gradle.kts .
+COPY build.gradle.kts .
+
+# Make gradlew executable
+RUN chmod +x gradlew
+
+# Download dependencies (for better caching)
+RUN ./gradlew dependencies --no-daemon
+
+# Copy source code
+COPY src/ src/
+
+# Build the application
+RUN ./gradlew shadowJar --no-daemon
+
+# Runtime stage
+FROM openjdk:24-jdk-slim
+
+# Install required runtime packages
+RUN apt-get update && apt-get install -y \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app user
+RUN groupadd -r ccoin && useradd -r -g ccoin ccoin
+
+# Set working directory
+WORKDIR /app
+
+# Copy the built JAR from builder stage
+COPY --from=builder /app/build/libs/*.jar app.jar
+
+# Change ownership to app user
+RUN chown -R ccoin:ccoin /app
+
+# Switch to app user
+USER ccoin
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+# JVM options for production
+ENV JAVA_OPTS="-Xmx512m -Xms256m -XX:+UseG1GC -XX:+UseStringDeduplication"
+
+# Run the application
+CMD ["sh", "-c", "java $JAVA_OPTS -jar app.jar"]
+

server/build.gradle.kts

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+val ktor_version: String by project
+val kotlin_version: String by project
+val logback_version: String by project
+val exposed_version: String by project
+val postgresql_version: String by project
+val hikari_version: String by project
+val flyway_version: String by project
+val bouncycastle_version: String by project
+
+plugins {
+    kotlin("jvm") version "2.2.21"
+    kotlin("plugin.serialization") version "2.2.21"
+    id("io.ktor.plugin") version "3.3.3"
+    id("com.gradleup.shadow") version "9.3.0"
+    id("org.flywaydb.flyway") version "11.19.0"
+    application
+}
+
+group = "org.ccoin"
+version = "1.0.0"
+
+application {
+    mainClass.set("org.ccoin.ServerKt")
+
+    val isDevelopment: Boolean = project.ext.has("development")
+    applicationDefaultJvmArgs = listOf("-Dio.ktor.development=$isDevelopment")
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    // Ktor server
+    implementation("io.ktor:ktor-server-core-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-netty-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-content-negotiation-jvm:$ktor_version")
+    implementation("io.ktor:ktor-serialization-kotlinx-json-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-cors-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-call-logging-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-status-pages-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-compression-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-default-headers-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-host-common-jvm:$ktor_version")
+    implementation("io.ktor:ktor-server-config-yaml:$ktor_version")
+
+    // Database
+    implementation("org.jetbrains.exposed:exposed-core:$exposed_version")
+    implementation("org.jetbrains.exposed:exposed-dao:$exposed_version")
+    implementation("org.jetbrains.exposed:exposed-jdbc:$exposed_version")
+    implementation("org.jetbrains.exposed:exposed-java-time:$exposed_version")
+    implementation("org.postgresql:postgresql:$postgresql_version")
+    implementation("com.zaxxer:HikariCP:$hikari_version")
+    implementation("org.flywaydb:flyway-core:$flyway_version")
+    implementation("org.flywaydb:flyway-database-postgresql:$flyway_version")
+
+    // Logging
+    implementation("ch.qos.logback:logback-classic:$logback_version")
+    implementation("io.github.oshai:kotlin-logging-jvm:7.0.0")
+
+    // Crypto utilities
+    implementation("org.bouncycastle:bcprov-jdk18on:$bouncycastle_version")
+    implementation("org.bouncycastle:bcpkix-jdk18on:$bouncycastle_version")
+    
+    // JSON
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.1")
+    
+    // Coroutines
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0")
+    
+    // Testing
+    testImplementation("io.ktor:ktor-server-test-host-jvm:$ktor_version")
+    testImplementation("org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version")
+    testImplementation("io.mockk:mockk:1.13.13")
+    testImplementation("org.junit.jupiter:junit-jupiter:5.11.3")
+    testImplementation("org.testcontainers:testcontainers:1.20.3")
+    testImplementation("org.testcontainers:postgresql:1.20.3")
+    testImplementation("org.testcontainers:junit-jupiter:1.20.3")
+}
+
+tasks.withType<Test> {
+    useJUnitPlatform()
+}
+
+// Fat JAR configuration for Docker
+tasks.jar {
+    enabled = false
+}
+
+tasks.shadowJar {
+    archiveClassifier.set("")
+    manifest {
+        attributes["Main-Class"] = "org.ccoin.ServerKt"
+    }
+    // mergeServiceFile()
+}
+
+// Flyway configuration
+flyway {
+    url = "jbdc:postgresql://localhost:5432/ccoin"
+    user = "ccoin"
+    password = "ccoin"
+    locations = arrayOf("classpath:db/migration")
+    baselineOnMigrate = true
+    validateOnMigrate = true
+}
+
+// Docker build task
+tasks.register<Exec>("buildDocker") {
+    dependsOn("shadowJar")
+    commandLine("docker", "build", "-t", "ccoin-server:latest", ".")
+}
+
+// Development task
+tasks.register("dev") {
+    dependsOn("run")
+    doFirst {
+        project.ext.set("development", true)
+    }
+}

server/docker-compose.yml

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+services:
+  # Postgres Database
+  postgres:
+    image: postgres:17-alpine
+    container_name: ccoin-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ccoin
+      POSTGRES_USER: ccoin
+      POSTGRES_PASSWORD: ccoin
+      POSTGRES_INITDB_ARGS: "--encoding=UTF-8 --lc-collate=C --lc-ctype=C"
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+      - ./docker/postgres/init:/docker-entrypoint-initdb.d
+    networks:
+      - ccoin-network
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ccoin -d ccoin"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 30s
+
+  # CCoin server
+  ccoin-server:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: ccoin-server
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      # Database configuration
+      DATABASE_URL: jdbc:postgresql://postgres:5432/ccoin
+      DATABASE_USER: ccoin
+      DATABASE_PASSWORD: ccoin
+      DATABASE_POOL_SIZE: 20
+
+      # Server configuration
+      SERVER_HOST: 0.0.0.0
+      SERVER_PORT: 8080
+      
+      # Mining configuration
+      MINING_DIFFICULTY: 4
+      MINING_REWARD: 50.0
+      BLOCK_TIME_TARGET: 600000
+
+      # Security
+      JWT_SECRET: your-super-secret-jwt-key-change-this-in-production
+
+      # Logging
+      LOG_LEVEL: INFO
+
+      # Development
+      DEVELOPMENT_MODE: false
+    volumes:
+      - ./logs:/app/logs
+    networks:
+      - ccoin-network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
+
+volumes:
+  postgres_data:
+    driver: local
+
+networks:
+  ccoin-network:
+    driver: bridge
+    ipam:
+      config:
+        - subnet: 172.20.0.0/16

server/gradle.properties

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+# Ktor
+ktor_version=3.3.3
+kotlin_version=2.2.21
+
+# Database
+exposed_version=0.56.0
+postgresql_version=42.7.4
+hikari_version=6.0.0
+flyway_version=11.19.0
+
+# Crypto
+bouncycastle_version=1.78.1
+
+# Logging
+logback_version=1.5.12
+
+# Gradle
+kotlin.code.style=official
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.caching=true
+org.gradle.parallel=true
+
+# Application
+ccoin.version=1.0.0

server/src/main/kotlin/org/ccoin/Server.kt

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+package org.ccoin
+
+fun main() {
+    println("CCoin Server Started")
+}