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44 lines
1.4 KiB
Solidity
44 lines
1.4 KiB
Solidity
2 years ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts v4.4.1 (interfaces/IERC3156FlashLender.sol)
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pragma solidity ^0.8.0;
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import "./IERC3156FlashBorrower.sol";
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/**
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* @dev Interface of the ERC3156 FlashLender, as defined in
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* https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
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*
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* _Available since v4.1._
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*/
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interface IERC3156FlashLender {
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/**
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* @dev The amount of currency available to be lended.
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* @param token The loan currency.
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* @return The amount of `token` that can be borrowed.
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*/
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function maxFlashLoan(address token) external view returns (uint256);
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/**
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* @dev The fee to be charged for a given loan.
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* @param token The loan currency.
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* @param amount The amount of tokens lent.
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* @return The amount of `token` to be charged for the loan, on top of the returned principal.
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*/
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function flashFee(address token, uint256 amount) external view returns (uint256);
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/**
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* @dev Initiate a flash loan.
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* @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
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* @param token The loan currency.
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* @param amount The amount of tokens lent.
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* @param data Arbitrary data structure, intended to contain user-defined parameters.
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*/
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function flashLoan(
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IERC3156FlashBorrower receiver,
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address token,
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uint256 amount,
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bytes calldata data
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) external returns (bool);
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}
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