Simple Economy Utilities

Simple Economy Utilities, or SEU, is a lightweight server-side economy mod that combines a complete player economy with Mail and an Auction House.

The goal of SEU is to provide the most useful economy features in one compact mod without requiring a large server-management suite.

Features

Economy

• Persistent player balances
• Player-to-player payments
• Offline player support
• Transaction history
• Configurable currency name and symbol
• Configurable decimal places
• Starting balance for new players
• Minimum and maximum transfer amounts
• Maximum account balance
• Automatic periodic income for online players
• Admin commands and administration GUI
• Server-authoritative transaction handling

Wallet

Players can manage their money through the built-in Wallet interface.

The Wallet includes:

• Current balance
• Send money to another player
• Known-player selector
• Two-step payment confirmation
• Recent transaction history

Mail

SEU includes a complete player mail system.

Players can:

• Send mail to online or offline players
• Use an Inbox and Sent Mail folder
• Attach items
• Attach money
• Write formatted messages
• Select known players when composing mail

Server administrators can configure:

• Daily mail limits
• Inbox size
• Sent-mail storage
• Mail retention time
• Maximum attachments
• Mail cooldown
• Automatic deletion of claimed attachment mails

Auction House

The built-in Auction House allows players to trade items without needing to be online at the same time.

Features include:

• Create item listings
• Buy listings
• Partial quantity purchases
• Search and sorting
• Categories
• Listing expiration
• Automatic item returns
• Configurable sale tax
• Configurable listing duration
• Configurable maximum active listings
• Admin cancellation and seizure tools
• Item blacklist support

Money and item delivery are integrated with the SEU Mail system where appropriate.

Administration

SEU includes a dedicated administration interface with separate sections for:

• Economy
• Mail
• Auction House

Administrators can change most important server settings directly in-game without manually editing configuration files.

All important actions are validated server-side.

Passive Income

Servers can optionally give players a small amount of money automatically while they are online.

Administrators can configure:

• The amount players receive
• The interval in minutes

Setting either value to 0 disables passive income.

This provides servers with a simple way to introduce money into the economy even when no additional shop or job system is installed.

Permissions

SEU includes its own permission abstraction and exposes permission nodes for Economy, Mail and Auction House features.

Examples include:

seu.economy.use
seu.economy.balance
seu.economy.pay
seu.economy.history
seu.economy.admin

seu.mail.access
seu.mail.send
seu.mail.send.items
seu.mail.send.money
seu.mail.admin

seu.auction.access
seu.auction.dashboard
seu.auction.max_active
seu.auction.admin

This makes it possible for permission integrations to control individual SEU features.

Designed for Multiplayer Servers

SEU is designed primarily for multiplayer environments.

The systems support:

• Offline players
• Persistent world data
• Transaction recovery
• Duplicate transaction protection
• Server-side permission checks
• Safe item and money handling

Current Platform

• Minecraft: 26.2
• Mod Loader: NeoForge
• Java: 25

Feedback and suggestions are welcome.