> ## Documentation Index
> Fetch the complete documentation index at: https://docs.2hour.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# Chains and pairs

> 2hour.fun runs on Robinhood Chain and Solana. Every coin trades against a pair chosen at launch.

## Two chains, one set of rules

2hour.fun runs on **Robinhood Chain** and **Solana** side by side: the same site, the same launch window, the same launch fee and the same rules. You can trade on both from one account.

| | Robinhood Chain | Solana |
| - | - | - |
| **Pay network fees in** | ETH | SOL |
| **Coins graduate to** | Uniswap | Raydium |
| **Explorer** | Blockscout | Solscan |

## Pairs

Every coin trades against something: its **pair**. The creator chooses it at launch and it never changes. The pair decides:

* what you pay with and what you get back when you sell;
* what [reward coins](https://docs.2hour.fun/reward-coins.md) pay their holders in;
* the pool the coin moves to when it [graduates](https://docs.2hour.fun/price-and-graduation.md).

### Native

Most coins pair with the chain's own coin: **ETH** on Robinhood Chain and **SOL** on Solana.

### Stock tokens

A coin can pair with a **stock token**: a token that tracks the price of a share, such as Tesla, Amazon or Netflix.

* You can still pay with plain ETH or SOL. The site swaps it for the stock token in the same trade.
* A stock-paired coin's dollar value also moves with that stock's price.
* The Create page lists every stock token you can pair with on each chain.

### Stablecoins

A coin can pair with a **stablecoin**, designed to stay at \$1: **USDG** on Robinhood Chain or **USDC** on Solana. The coin's dollar price then depends only on its own trading, not on the price of ETH or SOL. You can still pay with plain ETH or SOL, as with stock tokens.

> [!TIP]
>
> Prices across the site are shown in dollars, so you can compare coins whatever they're paired with. Each coin shows its pair as a small badge next to its name.


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