> For the complete documentation index, see [llms.txt](https://onebit.gitbook.io/onebit/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://onebit.gitbook.io/onebit/preface.md).

# Preface

<figure><img src="https://775303038-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSbOz9RB1Ywy821xZqHze%2Fuploads%2FXRtaDqqSiPEwgjheCAFb%2F%E2%80%8EONEBIT%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D-%E8%8B%B1%E6%96%8711.27.%E2%80%8E001.jpeg?alt=media&amp;token=33d07bc9-43a3-411a-9c53-ace84a5031b2" alt=""><figcaption></figcaption></figure>

<figure><img src="https://775303038-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSbOz9RB1Ywy821xZqHze%2Fuploads%2FpLpzSfemIuf8qjdPVJXc%2F%E2%80%8EONEBIT%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D-%E8%8B%B1%E6%96%8711.27.%E2%80%8E002.jpeg?alt=media&amp;token=ea12499d-1c37-442a-8147-fd904019ad28" alt=""><figcaption></figcaption></figure>

<figure><img src="https://775303038-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSbOz9RB1Ywy821xZqHze%2Fuploads%2FC7WdtSdWjIouk3TEfnJK%2F%E2%80%8EONEBIT%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D-%E8%8B%B1%E6%96%8711.27.%E2%80%8E003.jpeg?alt=media&amp;token=37546d34-b849-4efd-9c53-cbda8047c50b" alt=""><figcaption></figcaption></figure>

<figure><img src="https://775303038-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSbOz9RB1Ywy821xZqHze%2Fuploads%2FsBPcaQJP0QBuzdnWUKRf%2F%E2%80%8EONEBIT%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D-%E8%8B%B1%E6%96%8711.27.%E2%80%8E004.jpeg?alt=media&amp;token=4445567b-7a04-4e88-8bdb-8d4d80ec4d0c" alt=""><figcaption></figcaption></figure>

<figure><img src="https://775303038-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSbOz9RB1Ywy821xZqHze%2Fuploads%2FS9LcVzWoBbfTxDXpvQTb%2F%E2%80%8EONEBIT%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D-%E8%8B%B1%E6%96%8711.27.%E2%80%8E005.jpeg?alt=media&amp;token=e3f86126-1b06-40e3-a188-ba2a89323f27" alt=""><figcaption></figcaption></figure>