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Renamed flashloan fee in premium

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This commit is contained in:
The3D 2020-08-24 01:30:01 +02:00
parent 928770d9d5
commit dce7a73dda
2 changed files with 30 additions and 29 deletions
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4
contracts/interfaces/ILendingPool.sol
View File

@ -90,14 +90,14 @@ interface ILendingPool {
* @param target the address of the flashLoanReceiver
* @param reserve the address of the reserve
* @param amount the amount requested
* @param totalFee the total fee on the amount
* @param totalPremium the total fee on the amount
* @param referralCode the referral code of the caller
**/
event FlashLoan(
address indexed target,
address indexed reserve,
uint256 amount,
uint256 totalFee,
uint256 totalPremium,
uint16 referralCode
);
/**

55
contracts/lendingpool/LendingPool.sol
View File

@ -41,7 +41,7 @@ contract LendingPool is VersionedInitializable, ILendingPool {
//main configuration parameters
uint256 public constant REBALANCE_DOWN_RATE_DELTA = (1e27) / 5;
uint256 public constant MAX_STABLE_RATE_BORROW_SIZE_PERCENT = 25;
uint256 public constant FLASHLOAN_FEE_TOTAL = 9;
uint256 public constant FLASHLOAN_PREMIUM_TOTAL = 9;
ILendingPoolAddressesProvider internal addressesProvider;
@ -438,9 +438,9 @@ contract LendingPool is VersionedInitializable, ILendingPool {
}
struct FlashLoanLocalVars{
uint256 amountFee;
uint256 amountPlusFee;
uint256 amountPlusFeeInETH;
uint256 premium;
uint256 amountPlusPremium;
uint256 amountPlusPremiumInETH;
IFlashLoanReceiver receiver;
address aTokenAddress;
address oracle;
@ -467,9 +467,9 @@ contract LendingPool is VersionedInitializable, ILendingPool {
vars.aTokenAddress = reserve.aTokenAddress;
//calculate amount fee
vars.amountFee = amount.mul(FLASHLOAN_FEE_TOTAL).div(10000);
vars.premium = amount.mul(FLASHLOAN_PREMIUM_TOTAL).div(10000);
require(vars.amountFee > 0, 'The requested amount is too small for a FlashLoan.');
require(vars.premium > 0, 'The requested amount is too small for a FlashLoan.');
//get the FlashLoanReceiver instance
vars.receiver = IFlashLoanReceiver(receiverAddress);
@ -478,52 +478,53 @@ contract LendingPool is VersionedInitializable, ILendingPool {
IAToken(vars.aTokenAddress).transferUnderlyingTo(receiverAddress, amount);
//execute action of the receiver
vars.receiver.executeOperation(asset, amount, vars.amountFee, params);
vars.receiver.executeOperation(asset, amount, vars.premium, params);
//compounding the cumulated interest
reserve.updateCumulativeIndexesAndTimestamp();
vars.amountPlusFee = amount.add(vars.amountFee);
vars.amountPlusPremium = amount.add(vars.premium);
//transfer from the receiver the amount plus the fee
try IERC20(asset).transferFrom(receiverAddress, vars.aTokenAddress, vars.amountPlusFee) {
try IERC20(asset).transferFrom(receiverAddress, vars.aTokenAddress, vars.amountPlusPremium) {
//if the transfer succeeded, the executor has repaid the flashloans.
//the fee is compounded into the reserve
reserve.cumulateToLiquidityIndex(IERC20(vars.aTokenAddress).totalSupply(), vars.amountFee);
reserve.cumulateToLiquidityIndex(IERC20(vars.aTokenAddress).totalSupply(), vars.premium);
//refresh interest rates
reserve.updateInterestRates(asset, vars.amountFee, 0);
emit FlashLoan(receiverAddress, asset, amount, vars.amountFee, referralCode);
reserve.updateInterestRates(asset, vars.premium, 0);
emit FlashLoan(receiverAddress, asset, amount, vars.premium, referralCode);
}
catch(bytes memory reason){
//if the transfer didn't succeed, the executor either didn't return the funds, or didn't approve the transfer.
//we check if the caller has enough collateral to open a variable rate loan. If it does, then debt is mint to msg.sender
vars.oracle = addressesProvider.getPriceOracle();
vars.amountPlusFeeInETH = IPriceOracleGetter(vars.oracle)
vars.amountPlusPremiumInETH = IPriceOracleGetter(vars.oracle)
.getAssetPrice(asset)
.mul(vars.amountPlusFee)
.mul(vars.amountPlusPremium)
.div(10**reserve.configuration.getDecimals()); //price is in ether
ValidationLogic.validateBorrow(
reserve,
asset,
vars.amountPlusFee,
vars.amountPlusFeeInETH,
uint256(ReserveLogic.InterestRateMode.VARIABLE),
MAX_STABLE_RATE_BORROW_SIZE_PERCENT,
_reserves,
_usersConfig[msg.sender],
reservesList,
vars.oracle
reserve,
asset,
vars.amountPlusPremium,
vars.amountPlusPremiumInETH,
uint256(ReserveLogic.InterestRateMode.VARIABLE),
MAX_STABLE_RATE_BORROW_SIZE_PERCENT,
_reserves,
_usersConfig[msg.sender],
reservesList,
vars.oracle
);
IVariableDebtToken(reserve.variableDebtTokenAddress).mint(msg.sender, vars.amountPlusFee);
IVariableDebtToken(reserve.variableDebtTokenAddress).mint(msg.sender, vars.amountPlusPremium);
//refresh interest rates
reserve.updateInterestRates(asset, vars.amountFee, 0);
reserve.updateInterestRates(asset, vars.premium, 0);
emit Borrow(
asset,
msg.sender,
vars.amountPlusFee,
vars.amountPlusPremium,
uint256(ReserveLogic.InterestRateMode.VARIABLE),
reserve.currentVariableBorrowRate,
referralCode