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

# Venue System

> Understanding the venue system for CLOB market trading

## Overview

CLOB markets use a **venue system** where each market is associated with specific contract addresses. Before placing orders, you must fetch venue data for the market.

## How It Works

<Steps>
  <Step title="Fetch market data">
    `GET /markets/:slug` returns venue information for the market.
  </Step>

  <Step title="Use venue.exchange">
    This address is the `verifyingContract` for EIP-712 order signing.
  </Step>

  <Step title="Cache the venue">
    Venue data is **static** per market — fetch once and reuse.
  </Step>
</Steps>

## Venue Response

```json theme={null}
{
  "venue": {
    "exchange": "0xA1b2C3...",
    "adapter": "0xD4e5F6..."
  }
}
```

## Required Token Approvals

Before trading, set up token approvals based on your order type:

| Order Type | Market Type       | Approve To                                                    |
| ---------- | ----------------- | ------------------------------------------------------------- |
| **BUY**    | All CLOB          | USDC → `venue.exchange`                                       |
| **SELL**   | Simple CLOB       | Conditional Tokens → `venue.exchange`                         |
| **SELL**   | NegRisk / Grouped | Conditional Tokens → `venue.exchange` **AND** `venue.adapter` |

<Warning>
  For NegRisk SELL orders, you must approve to **both** the exchange and the adapter addresses.
</Warning>