# Bitfrost The Bifröst faciliates connections with external networks, such as Binance Chain, Ethereum and Bitcoin. The Bifröst is generally well-abstracted, needing only minor changes between different chains. The Bifröst handles observations of incoming transactions, which are passed into SwipeChain via special witness transactions. The Bifröst also handles multi-party computation to sign outgoing transactions via a Genarro-Goldfeder TSS scheme. Only 2/3rds of nodes are required to be in each signing ceremony on a first-come-first-serve basis, and there is no log of who is present. In this way, each node maintains plausible deniabilty around involvement with every transaction. To add a new chain, adapt one of the existing modules to the new chain, and submit a merge request to be tested and validated. Once merged, new nodes can start signalling support for the new chain. Once a super-majority (67%) of nodes support the new chain it will be added to the network. To remove a chain, nodes can stop witnessing it. If a super-majority of nodes do not promptly follow suit, the non-witnessing nodes will attract penalties during the time they do not witness it. If a super-majority of nodes stop witnessing a chain it will invoke a chain-specific Ragnörok, where all funds attributed to that chain will be returned and the chain delisted. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.swipe.org/swipechain/swipe-nodes/bitfrost.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.