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

# Wormhole Swap

> Permissionless, open-source cross-chain token swaps built on Wormhole primitives and powered by Mayan.

**What it is:**\
Wormhole Swap leverages the Wormhole Token Bridge’s mint-and-burn architecture enhanced by Wormhole’s generic message-passing capabilities to enable seamless cross-chain, one-click token swaps. Developed by Mayan, this protocol embeds swap-specific metadata alongside Token Bridge messages, making cross-chain swaps efficient and trustless.

**How it works:**

* Users initiate a swap that sends tokens via the Wormhole Token Bridge using mint-and-burn.
* Swap details are embedded in generic Wormhole messages delivered by relayers on Solana.
* Drivers receive all swap information and participate in a Mayan on-chain auction to determine the best execution price.
* The auction winner performs a flash swap on Solana, obtaining the funds and atomically sending the promised output amount within the same transaction.
* Post-swap, if the destination address is on Solana, the relayer directly transfers output tokens to the user's wallet. Otherwise, relayers send tokens to destination chains via the Token Bridge.

**Key advantages:**

* Atomic flash swaps ensure secure, simultaneous execution without intermediary risk.
* Fully permissionless and open-source.
* Efficient use of Wormhole messaging coupled with Mayan’s competitive auction to optimize pricing and execution.

Here is an overview of what happens when a user executes a cross-chain transaction on Mayan:

<img src="https://mintcdn.com/mayan/ihNddQ22_V9vHo__/images/MayanWHSwap.jpg?fit=max&auto=format&n=ihNddQ22_V9vHo__&q=85&s=dd6e897d8ac3a962fae4961d085c70a3" alt="Mayan WH Swap.jpg" width="1280" height="720" data-path="images/MayanWHSwap.jpg" />

**Protocol fee:**\
The Wormhole Swap fees are set at 10 basis points (0.10%).

### WH Swap Contract Addresses

| Network   | Wormhole Chain ID | Contract Address                               |
| --------- | ----------------- | ---------------------------------------------- |
| Solana    | 1                 | `FC4eXxkyrMPTjiYUpp4EAnkmwMbQyZ6NDCh1kfLn6vsf` |
| Ethereum  | 2                 | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| BSC       | 4                 | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| Polygon   | 5                 | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| Avalanche | 6                 | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| Arbitrum  | 23                | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| Optimism  | 24                | `0xBF5f3f65102aE745A48BD521d10BaB5BF02A9eF4`   |
| Base      | 30                | `0x11AA521C888d84f374B63823d9b873CAa3591f55`   |