Nitro

Nitro is a cross-chain swapping engine that allows for cross-chain asset transfers as well as cross-chain sequencing of asset transfers and arbitrary instruction transfers. Nitro has a whole development suite around it, which includes:

1. a widget that can be used by other projects to give their users an option to perform cross-chain transactions directly from their UI;

2. an API and a SDK that abstracts Nitro's backend capabilities for projects that want to use their own UI/platform for offering the cross-chain asset swap functionality;

3. most importantly, the sequencer library, which allows developers to build cross-chain applications that require both asset transfer and instruction transfer in a single cross-chain request.