> For the complete documentation index, see [llms.txt](https://trident-cas.sabn.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trident-cas.sabn.xyz/api/upgrader.md).

# Upgrader

#### Overview

The upgrader allows users to bet an amount to upgrade to a more expensive item based on calculated win chances with a house edge.

**Base Path**: `/upgrader`

***

#### Endpoints

**1. GET `/upgrader/items`**

Get all inventory items with caching. Returns items sorted by price in descending order.

**Query Parameters**

None.

**Response**

Returns an array of item objects, filtered to only include items with valid prices (> $0).

```typescript
Array<{
    appid: number;
    marketHashName: string;
    gunName: string;
    skinName: string;
    image: string;
    price: string;
    nextPriceFetch: number;
}>;
```

**Example Request**

```bash
curl http://localhost:4000/upgrader/items
```

**Example Response**

```json
[
    {
        "appid": 730,
        "marketHashName": "★ Butterfly Knife | Lore",
        "gunName": "★ Butterfly Knife",
        "skinName": "Lore",
        "image": "https://community.fastly.steamstatic.com/economy/image/-9a81dlWLwJ2UUGcVs_nsVtzdOEdtWwKGZZLQHTxDZ7I56KU0Zwwo4NUX4oFJZEHLbXH5ApeO4YmlhxYQknCRvCo04DEVlxkKgpovbSsLQJf0ebcZThQ6tCvq4OeqPXhJ6_UhG1d8fp9hfvEyoD8j1yg5UplNz_ydo-ddw5rYQqB-1G4ye_vhMftuMubyCdn6XUk4XneyUS0hh1SLrs4xn-YYas/360fx360f",
        "price": "$2349.74",
        "nextPriceFetch": 1735123456789
    },
    {
        "appid": 730,
        "marketHashName": "★ Karambit | Tiger Tooth",
        "gunName": "★ Karambit",
        "skinName": "Tiger Tooth",
        "image": "https://...",
        "price": "$1836.23",
        "nextPriceFetch": 1735123456789
    }
]
```

**Notes**

* Uses in-memory caching with 1-hour duration
* Automatically filters out items without prices or with price ≤ $0
* Items are sorted by price in descending order (most expensive first)

***

**2. GET `/upgrader/items/pagination`**

Get paginated inventory items with search and sorting capabilities.

**Query Parameters**

| Parameter | Type     | Default        | Description                                                             |
| --------- | -------- | -------------- | ----------------------------------------------------------------------- |
| `page`    | `number` | `1`            | Page number for pagination (minimum: 1)                                 |
| `limit`   | `number` | `18`           | Number of items per page                                                |
| `sort`    | `string` | `"Descending"` | Sort order by price: `"Ascending"` or `"Descending"`                    |
| `search`  | `string` | `""`           | Search term to filter items by gun name or skin name (case-insensitive) |

**Response**

```typescript
{
    items: Array<ItemObject>;
    pagination: {
        currentPage: number;
        totalPages: number;
        totalItems: number;
        hasNextPage: boolean;
        hasPrevPage: boolean;
        limit: number;
    }
}
```

**Example Request**

```bash
# Default pagination
curl "http://localhost:4000/upgrader/items/pagination"

# With custom parameters
curl "http://localhost:4000/upgrader/items/pagination?page=2&limit=10&sort=Ascending&search=AK-47"
```

**Example Response**

```json
{
    "items": [
        {
            "appid": 730,
            "marketHashName": "AK-47 | Panthera onca (Field-Tested)",
            "gunName": "AK-47",
            "skinName": "Panthera onca",
            "image": "https://...",
            "price": "$327.64",
            "nextPriceFetch": 1754082321623
        },
        {
            "appid": 730,
            "marketHashName": "AK-47 | Inheritance (Factory New)",
            "gunName": "AK-47",
            "skinName": "Inheritance",
            "image": "https://...",
            "price": "$285.27",
            "nextPriceFetch": 1754082315375
        }
    ],
    "pagination": {
        "currentPage": 1,
        "totalPages": 5,
        "totalItems": 14,
        "hasNextPage": true,
        "hasPrevPage": false,
        "limit": 3
    }
}
```

**Notes**

* Search is performed across both `gunName` and `skinName` fields
* Search is case-insensitive
* Items without valid prices (null or ≤ $0) are automatically filtered out
* Sorting is applied after filtering and searching

***

#### Data Models

**Item Object**

```typescript
{
    appid: number; // Steam app ID (730 = CS2, 252490 = Rust)
    marketHashName: string; // Full item name as it appears on Steam Market
    gunName: string; // Weapon/item name
    skinName: string; // Skin/variant name
    image: string; // CDN URL for item image (360x360)
    price: string; // Formatted price string (e.g., "$12.50")
    nextPriceFetch: number; // Unix timestamp for next price update
}
```

**Inventory Database Schema**

```typescript
{
    appid: number; // Required
    marketHashName: string; // Required, unique identifier
    gunName: string; // Required
    skinName: string; // Required
    image: string; // Required
    price: string; // Required (can be null initially)
    nextPriceFetch: number; // Default: Date.now()
    customPrice: boolean; // Default: false (if true, price won't auto-update)
}
```

***

#### Error Handling

All endpoints include comprehensive error handling:

* **200**: Success
* **500**: Internal Server Error (database or network issues)

Error responses follow this format:

```json
{
    "error": "Error message describing what went wrong"
}
```

***

#### Frontend Integration

**Example: Fetching All Items**

```javascript
const response = await fetch("http://localhost:4000/upgrader/items");
const items = await response.json();

// Use items in upgrader UI
console.log(`Loaded ${items.length} items`);
```

**Example: Paginated Items with Search**

```javascript
const params = new URLSearchParams(
    page: "1",
    limit: "20",
    sort: "Descending",
    search: "AK-47",
});

const response = await fetch(`http://localhost:4000/upgrader/items/pagination?${params}`);
const { items, pagination } = await response.json();

console.log(`Page ${pagination.currentPage} of ${pagination.totalPages}`);
console.log(`Found ${pagination.totalItems} items matching "AK-47"`)
```


---

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