Full Source Code | NexusExchange - Stock & Crypto Engine

NexusExchange — Source Code

The complete, documented source for NexusExchange — built to read, learn from, and extend

The full Maven project behind the hybrid stock market & live crypto exchange: a real stochastic price engine, limit orders, dividends, IPOs, Discord integration, a unified Paper/Folia scheduler, and a clean HikariCP persistence layer.

Java 21 • Maven • Paper • Purpur • Folia • fully commented

What is this?

The complete, buildable source code for NexusExchange — not an obfuscated jar, but the real, readable project. Every class is documented, the architecture is cleanly separated into packages, and the whole thing compiles to a shaded, ready-to-run jar with a single Maven command.

This is the source add-on. You need it only if you want the code itself — the compiled plugin is sold separately.

What You Get

The full Maven project: mvn clean package produces the finished, shaded jar.
Documented throughout: Javadoc explaining the why, not just the what.
Clean package layout: market, model, manager, gui, database, scheduler, event, hook, discord, placeholderapi, command, util.
Every v1.1 system included: limit orders, dividends, IPOs, watchlists, transaction tax, leaderboards, Discord webhooks, PlaceholderAPI and shop integration — all in source.
Transparent build: HikariCP, Gson, bStats bundled and relocated cleanly.

Architecture Highlights

Price engine: PriceModel implements GBM in log-space with Ornstein-Uhlenbeck mean reversion; CoinGeckoClient handles batched live fetches with fallback.
Asset model: an AbstractMarketAsset base with Stock/CryptoCoin subclasses — add a new asset type and the engine, GUI, and persistence pick it up generically.
Order & dividend systems: an in-memory order book checked each tick (OrderManager) and an interval-driven DividendScheduler, each backed by its own repository.
IPO lifecycle: IPOManager drives the ANNOUNCED → OPEN → CLOSED/FAILED phases and hands finished offerings over into the live market.
Discord layer: a dependency-free webhook client (JDK HttpClient) with a typed MarketReporter and a hand-rolled embed builder.
Unified scheduler: a PlatformScheduler abstraction (Bukkit + Folia) behind a factory; one codebase runs on both.
Persistence: a HikariCP DatabaseManager over SQLite, H2, and MySQL/MariaDB — holdings, a full transaction audit log, price history, orders, dividends, IPO purchases and watchlists.
Optional integrations done right: VaultHook, PlaceholderAPI and the shop hooks load reflectively and degrade gracefully when their plugin is absent.
Economy & events: MarketEventEngine drives crash/hype and EconomyInfluenceListener ties gameplay to price pressure.

Why Buy the Source?

Total customization: change the price math, add asset types, add order kinds, rework the GUI — no config ceiling.
A real learning resource: production-quality stochastic modeling, Folia-safe scheduling, reflective soft-dependency hooks, dependency-free Discord webhooks.
Clean base: well-separated, documented packages make a comfortable starting point.
No black box: understand exactly what runs on your server.

Requirements

Java 21+ and Maven to build.
Bukkit / Spigot / Paper / Purpur / Folia 1.20+ to run.
Vault + an economy plugin (optional) for live trading.
Basic Java knowledge for meaningful changes.

License & Terms

By purchasing this source code, you agree to:

No resale: you may not sell, sublicense, or commercialize the source or any modified version.
No redistribution: you may not share or hand out the source, in whole or in part, to any third party.
No reupload: you may not republish the source or any derivative on any platform, public or private.

You may freely use and modify the source for your own server(s). This grants a personal-use license only; all rights remain with the author.

Own the engine, not just the jar.
Get the full NexusExchange source, build it yourself, and shape the market exactly how you want it.