> ## Documentation Index
> Fetch the complete documentation index at: https://docs.555hyper.link/llms.txt
> Use this file to discover all available pages before exploring further.

# Arcade Overview

> The High-Voltage Playground

# The 555 Arcade

The **555 Arcade** is the user-facing layer of the ecosystem. It is where the "Invisible Engine" becomes visible. It is built as a **Next.js Monorepo** utilizing the **555x402 SDKs**.

## Integration Architecture

The Arcade is not just a website; it is a **VAP Client**. Every game hosted in the arcade is wrapped in a "Harness" that communicates with the protocol.

### The Game Harness

The Harness is a React component that manages the VAP session lifecycle.

```tsx theme={null}
<GameHarness appId="sector-13" onSessionStart={handleStart}>
  <PhaserGame />
</GameHarness>
```

### The Event Loop

1. **Initialization**: The Harness connects to `wss://vap.rendernet.work`.
2. **Gameplay**: The user plays the game. The game engine emits events (`SCORE_UPDATE`, `ENEMY_KILL`).
3. **Hashing**: The Harness aggregates these events into a Merkle Root every 5 seconds.
4. **Signing**: The user's wallet (via session key) signs the root.
5. **Transmission**: The signed payload is sent to the VAP Verifier.

## The Economy

The Arcade is the primary sink and source for the ecosystem's tokens.

### \$555 Token (The Points)

* **Type**: SPL Token (Fungible).
* **Utility**: Used for micro-transactions (Continue? Insert Coin).
* **Velocity**: Designed for high velocity. Earned fast, spent fast.

### USDC (The Capital)

* **Type**: SPL Token (Fungible).
* **Utility**: The underlying gas of the "Streaming OS".
* **Rewards**: High-value quests and "Boss Battles" pay out in real USDC.

### Audience Yield

The Arcade turns players into stakeholders.

* **Play-to-Earn (Evolution)**: Unlike gen-1 P2E, rewards are sustainable because they are funded by **Advertiser Demand**, not inflation.
* **Attention Mining**: Simply being present and verified in the Arcade mines value from the "Attention Liquidity Pool".

## Leaderboards

Leaderboards are not just database rows; they are **Aggregated Proofs**.

* **Source of Truth**: The Redis ledger maintained by the VAP Verifier.
* **Sync**: Synced to Postgres for easy querying by the Frontend.
* **Verification**: Any score on the leaderboard can be traced back to a signed VAP packet.