> For the complete documentation index, see [llms.txt](https://docs.swipe.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.swipe.org/swipechain/introduction.md).

# Introduction

SwipeChain comes to consensus about events observed on external networks via witness transactions from nodes. Swap and stake logic is then applied to these finalised events. Each event causes a state change in SwipeChain, and some events generate an output transaction which require assets to be moved (outgoing swaps or bond/liquidity withdrawals). These output transactions are then batched, signed by a threshold signature scheme protocol and broadcast back to the respective external network. The final gas fee on the network is then accounted for and the transaction complete.