> For the complete documentation index, see [llms.txt](https://docs.bitswap.site/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitswap.site/protocol/product-design.md).

# Product design

By integrating with Multibit and BitStable, BitSwap could support cross-chain swap in three steps:

1. ERC20 <–> DAII: users can swap any ERC20 token (ETH/USDT/etc..) to DAII on BitSwap. DAII is the first and largest original stablecoin in Bitcoin Ecosystem and BitSwap provides the best liquidity for DAII among multi-chains.
2. DAII <-> bridged BRC20: BitSwap introduces DAII As A Service (DAAS) and fosters enhanced liquidity pairing DAII with other BRC20 assets. Users can swap DAII with any bridged BRC20 tokens on BitSwap.&#x20;
3. Bridged BRC20 <–> BRC20: BitSwap integrates Multibit bridge’s innovation and enables users to transfer bridged BRC20 to Bitcoin seamlessly.

Bitcoin will provide full access and functionalities for the three steps above, and will integrate three steps into one-click trading in the near future.

<figure><img src="/files/GFnohxjJKq44JO3XJLtB" alt=""><figcaption></figcaption></figure>

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