# Transaction Overview The main purpose of any transaction is to move funds between parties. Each transaction has several inputs and outputs. [Account](/implementation/account-and-notes/accounts.md) and [notes](/implementation/account-and-notes/notes.md) can be used as inputs and outputs. The current implementation assumes that each transaction has: 1. A single input and output account and 2. A fixed number of input (3) and output (127) notes. The input and output accounts designate a transaction initiator. Account changes (including balance, energy and spent offset) are reflected in the output account. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.zkbob.com/implementation/transaction-overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.