The atomic swap protocol allows for the exchange of cryptocurrencies on different blockchains without the need to trust a third-party. However, market participants who desire to hold derivative assets such as options or futures would also benefit from trustless exchange. In this paper I propose the atomic swaption, which extends the atomic swap to allow for such exchanges. Crucially, atomic swaptions do not require the use of oracles. I also introduce the margin contract, which provides the ability to create leveraged and short positions. Lastly, I discuss how atomic swaptions may be routed on the Lightning Network.
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