> For the complete documentation index, see [llms.txt](https://docs.cyclenetwork.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cyclenetwork.io/cycle-network-docs/cycle-core-sdk/introduction.md).

# Introduction

CYCLE-CORE-SDK is a highly integrated development tool that allows developers to easily implement their applications empowered by Cycle. It provides JavaScript interfaces to interact with Cycle Network in all aspects. Just two steps Rollin and Rollout to achieve chain abstraction.

This section lists the most common used interfaces in CYCLE-CORE-SDK, and will help developers to refer the SDK functions quickly.

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CYCLE-CORE-SDK is currently undergoing rapid iteration, and in subsequent version upgrades, some interfaces may not be backward compatible.
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