# default

An entrypoint that accepts users' lambdas during a [***flash\_swap***](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract/entrypoints-overview/dex-entrypoints/swap) operations on [***DexCore***](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract) contract and executes them.

### Call parameters

```pascaligo
type default_t          is unit -> list(operation)
```

<table><thead><tr><th width="150">Field</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>default_t</td><td>unit -> list(operation)</td><td>Users's lambda function that doesn't accept any parameters (<em><strong>unit</strong></em>) and returns a list of operations (transactions, calls).</td></tr></tbody></table>

### Usage

Only [***DexCore***](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract) contract can call this entrypoint.

### Errors

* `403` - `sender` of the transaction is not [DexCore](https://docs.quipuswap.com/smart-contracts/dex-2.0/dexcore-contract) contract.
* `412` - non payable entrypoint (can't accept TEZ tokens during call of an entrypoint).


---

# 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.quipuswap.com/smart-contracts/dex-2.0/flashswapsproxy-contract/entrypoints-overview/default.md?ask=<question>
```

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.