aave-protocol-v2/contracts/fees/FeeProvider.sol
2020-07-13 11:54:08 +03:00

56 lines
1.8 KiB
Solidity

// SPDX-License-Identifier: agpl-3.0
pragma solidity ^0.6.8;
import '../libraries/openzeppelin-upgradeability/VersionedInitializable.sol';
import '../interfaces/IFeeProvider.sol';
import '../libraries/WadRayMath.sol';
/**
* @title FeeProvider contract
* @notice Implements calculation for the fees applied by the protocol
* @author Aave
**/
contract FeeProvider is IFeeProvider, VersionedInitializable {
using WadRayMath for uint256;
// percentage of the fee to be calculated on the loan amount
uint256 public originationFeePercentage;
uint256 public constant FEE_PROVIDER_REVISION = 0x1;
function getRevision() internal override pure returns (uint256) {
return FEE_PROVIDER_REVISION;
}
/**
* @dev initializes the FeeProvider after it's added to the proxy
* @param _addressesProvider the address of the LendingPoolAddressesProvider
*/
function initialize(address _addressesProvider) public initializer {
/// @notice origination fee is set as default as 25 basis points of the loan amount (0.0025%)
originationFeePercentage = 0.0025 * 1e18;
}
/**
* @dev calculates the origination fee for every loan executed on the platform.
* @param _user can be used in the future to apply discount to the origination fee based on the
* _user account (eg. stake AAVE tokens in the lending pool, or deposit > 1M USD etc.)
* @param _amount the amount of the loan
**/
function calculateLoanOriginationFee(address _user, uint256 _amount)
external
override
view
returns (uint256)
{
return _amount.wadMul(originationFeePercentage);
}
/**
* @dev returns the origination fee percentage
**/
function getLoanOriginationFeePercentage() external override view returns (uint256) {
return originationFeePercentage;
}
}