Damdara WASM

Dragon Quest core module compiled to WebAssembly. Experience the classic "Fukkatsu no Jumon" (Revival Password) system and turn-based battle mechanics in your browser or Node.js application.

🌐 Try Live Demo

Features

• 🔐 Password System - Generate and decode 20-character hiragana passwords
• ⚔️ Battle System - Turn-based combat with monsters
• 📊 Character Management - Player stats, equipment, and progression
• 🎮 Master Data - Complete database of monsters, items, spells, and equipment
• 🦀 Pure Rust - Compiled to WebAssembly for performance
• 📦 Zero Dependencies - Standalone WASM module

Installation

npm install damdara

or

yarn add damdara

Usage

Basic Example

import init, { WasmGame } from 'damdara';

// Initialize the WASM module
await init();

// Create a new game instance
const game = new WasmGame();

// Create a player
const playerState = game.create_player("ゆうてい");
console.log(playerState);
// {
//   summary: { name: "ゆうてい", level: 1, hp: 15, mp: 0, ... },
//   strength_status: { strength: 4, agility: 4, ... },
//   items: []
// }

Password System

// Generate a password from current player state
const password = game.generate_password();
console.log(password); // "あいうえお..." (20 hiragana characters)

// Load player from password
const loadedState = game.load_from_password("あいうえおかきくけこ...");
console.log(loadedState);

Battle System

// Queue battle actions
game.queue_battle_action("attack");
game.queue_battle_action("attack");
game.queue_battle_action("spell");
game.queue_battle_input(1); // Spell selection

// Run battle against monster ID 0 (Slime)
const result = game.run_battle(0);
console.log(result);
// {
//   player_survived: true,
//   monster_defeated: true,
//   player_escaped: false,
//   monster_escaped: false,
//   messages: ["スライムがあらわれた！", ...],
//   final_player_state: { ... }
// }

Master Data Access

// Get all monsters
const monsters = game.get_monsters();
console.log(monsters);
// [
//   { id: 0, name: "スライム", hp: 3, attack: 5, defense: 3, ... },
//   { id: 1, name: "スライムベス", hp: 4, attack: 7, ... },
//   ...
// ]

// Get all weapons
const weapons = game.get_weapons();

// Get all spells
const spells = game.get_spells();

// Get status progression table
const statusTable = game.get_status_table();

API Reference

WasmGame

Main game interface.

Constructor

• new WasmGame() - Create a new game instance

Player Management

• create_player(name: string): PlayerState - Create a new player
• get_player_state(): PlayerState - Get current player state
• has_player(): boolean - Check if player exists
• generate_password(): string - Generate 20-character password
• load_from_password(password: string): PlayerState - Load from password

Battle System

• queue_battle_action(action: string): void - Queue action ("attack", "spell", "item", "escape")
• queue_battle_input(value: number): void - Queue numeric input (menu selection)
• run_battle(monster_id: number): BattleResult - Execute battle
• clear_battle_input(): void - Clear action queue

Master Data

• get_monsters(): MonsterData[] - Get all monsters
• get_weapons(): EquipmentData[] - Get all weapons
• get_armors(): EquipmentData[] - Get all armor
• get_shields(): EquipmentData[] - Get all shields
• get_items(): EquipmentData[] - Get all items
• get_spells(): SpellData[] - Get all spells
• get_status_table(): StatusData[] - Get level progression data

Messages

• get_messages(): string[] - Get accumulated messages
• clear_messages(): void - Clear message buffer

TypeScript Support

This package includes TypeScript definitions out of the box:

import init, { WasmGame, PlayerState, BattleResult } from 'damdara';

await init();
const game: WasmGame = new WasmGame();
const state: PlayerState = game.create_player("ゆうてい");

Browser Compatibility

• Chrome/Edge 90+
• Firefox 89+
• Safari 15+

Requires WebAssembly support.

Node.js Usage

import { readFile } from 'fs/promises';
import init, { WasmGame } from 'damdara';

// Load WASM file explicitly in Node.js
const wasmBuffer = await readFile('./node_modules/damdara/damdara_bg.wasm');
await init(wasmBuffer);

const game = new WasmGame();
// ... use normally

Examples

See the live demo for a complete web application example.

Source code: GitHub Repository

License

MIT © Daisuke Takayama

Links

• 📖 Full Documentation
• 🌐 Live Demo
• 🐛 Report Issues
• 📦 npm Package
• 📦 crates.io