# IAlgebraFlashCallback Callback for IAlgebraPoolActions#flash Any contract that calls IAlgebraPoolActions#flash must implement this interface *Developer note: Credit to Uniswap Labs under GPL-2.0-or-later license: * ## Functions ### algebraFlashCallback `function algebraFlashCallback(uint256 fee0, uint256 fee1, bytes data) external` external Called to \`msg.sender\` after transferring to the recipient from IAlgebraPool#flash. *Developer note: In the implementation you must repay the pool the tokens sent by flash plus the computed fee amounts. The caller of this method must be checked to be a AlgebraPool deployed by the canonical AlgebraFactory.* | Name | Type | Description | | ---- | ------- | ---------------------------------------------------------------------------- | | fee0 | uint256 | The fee amount in token0 due to the pool by the end of the flash | | fee1 | uint256 | The fee amount in token1 due to the pool by the end of the flash | | data | bytes | Any data passed through by the caller via the IAlgebraPoolActions#flash call | --- # 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.algebra.finance/algebra-integral-documentation/algebra-v1-technical-reference/contracts/api-reference-v1.9/v1.9-core/ialgebraflashcallback.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.