> 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/games/roulette.md).

# Roulette

There are 15 total squares:

* 7 Gray (2x payout)
* 7 Gold (2x payout)
* 1 Purple (14x payout)

***

### Game States

The game continuously loops through three states:

* **`0` (Waiting)**: Time to place bets (20 seconds).
* **`1` (Spinning)**: The result is generated, UI animation spins (7 seconds).
* **`2` (After Spin)**: Payouts are distributed to winners (3 seconds).

***

### Events

#### Client -> Server

**`roulette:bet`**

Places a bet on a specific color.

* **Payload**:

  ```json
  {
      "color": "gold", // "gray", "gold", or "purple"
      "amount": 10.5
  }
  ```
* **Response**: `roulette:bet` (Confirmation)

**`roulette:status`**

Fetches the current global game state. Usually called when the client first opens the game or reconnects.

* **Payload**: None
* **Response**: `roulette:status` (Current state, timer, grouped bets, and history)

***

#### Server -> Client

**`roulette:bet` (Response)**

Confirms whether the bet was successfully placed.

* **Payload (Success)**:

  ```json
  {
      "status": true,
      "amount": 10.5
  }
  ```
* **Payload (Error)**:

  ```json
  {
      "status": false,
      "message": "Game has already started" // or "Not enough balance", etc.
  }
  ```

**`roulette:state` (Broadcast)**

Broadcasted by the server loop to update the countdown timer or state transitions.

* **Payload**:

  ```json
  {
      "state": 0, // 0 = waiting, 1 = spinning, 2 = after spin
      "timer": 15000 // Milliseconds remaining for this state
  }
  ```

**`roulette:bets` (Broadcast)**

Broadcasted to all clients whenever a new bet is successfully placed. It contains the aggregated bets grouped by color.

* **Payload**:

  ```json
  {
      "bets": {
          "gray": [
              {
                  "amount": 25.0,
                  "pfp": "url",
                  "steamid": "user-id",
                  "username": "Player1",
                  "userLevel": 5
              }
          ],
          "gold": [],
          "purple": []
      }
  }
  ```

**`roulette:status` (Response)**

Returns the complete current context of the game.

* **Payload**:

  ```json
  {
      "bets": { "gray": [], "gold": [], "purple": [] }, // Grouped bets
      "state": 0,
      "timer": 12000,
      "last100": [4, 12, 14, 2, ...], // History of the last 100 round results (indexes 0-14)
      "index": 0 // The current round's winning index (if state > 0)
  }
  ```

**`roulette:result` (Broadcast)**

Broadcasted when the state transitions from `Waiting` (0) to `Spinning` (1). It tells the UI what the outcome of the spin is so the animation can begin.

* **Payload**:

  ```json
  {
      "result": "gold",
      "index": 4, // 0 to 14
      "last100": [4, 12, 14, 2, ...] // History with the new index prepended
  }
  ```

**`roulette:proof` (Broadcast)**

Broadcasted alongside `roulette:result` at the start of the spin, providing the provably fair commitment hashes.

* **Payload**:

  ```json
  {
      "serverSeedCommitment": "hash", // SHA256 hash of the unrevealed server seed
      "publicSeed": "block-id", // EOS Head Block ID or backup random hex
      "nonce": 123 // Global Redis nonce for the round
  }
  ```

**`roulette:reveal` (Broadcast)**

Broadcasted when the round ends and transitions back to `Waiting` (0). It reveals the unhashed server seed used in the previous spin.

* **Payload**:

  ```json
  {
      "serverSeed": "original-secret-hex"
  }
  ```

***

### Game Logic Details

1. **Provably Fair**:
   * Uses `serverSeed`, `publicSeed`, and a globally incrementing Redis `nonce`.
   * The generated `random` result is derived via `deriveUint32` modulo 15, yielding an `index` between 0 and 14.
   * `index === 14` maps to purple (1/15 chance).
   * Even `index` (excluding 14) maps to gold (7/15 chance).
   * Odd `index` maps to gray (7/15 chance).
2. **Concurrency & Architecture**:
   * The entire game state and loop timers are stored globally in Redis.
   * Global locks (`Game.withLock`) ensure only one server instance transitions the game states or processes winners.
   * Bets are wrapped in user locks to prevent balance deduction race conditions.


---

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