> For the complete documentation index, see [llms.txt](https://ola-2.gitbook.io/ola-developer-documents/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ola-2.gitbook.io/ola-developer-documents/olavm/concepts/transactions.md).

# Transaction

A transaction is a fundamental data structure for publishing a state transition on the system.