# Overview [**SwapExecutor**](/integrations/execution/swap-executor.md): The `SwapExecutor` provides a unified interface for executing swaps. It handles interactions with the underlying liquidity pools, manages token approvals, controls input/output amounts, and ensures gas-efficient and secure execution. Each protocol must implement its own `SwapExecutor` (a Solidity contract) tailored to its specific logic and requirements. [**SwapEncoder**](/integrations/execution/swap-encoder.md): The `SwapEncoder` encodes protocol components and swap parameters into valid calldata for the corresponding `SwapExecutor` contract. It ensures that swap details—including input/output tokens, pool addresses, and other protocol-specific parameters—are accurately formatted and encoded before being sent to the `SwapExecutor`. Each protocol must implement its own `SwapStructEncoder` Python class to maintain compatibility with its `SwapExecutor`. --- # 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.propellerheads.xyz/integrations/execution/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.