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Updated flashloan function

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This commit is contained in:
The3D 2020-08-23 16:49:23 +02:00
parent 8e3c1a048b
commit 9377a137f1
1 changed files with 2 additions and 18 deletions
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20
contracts/lendingpool/LendingPool.sol
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@ -459,16 +459,9 @@ contract LendingPool is VersionedInitializable, ILendingPool {
address aTokenAddress = reserve.aTokenAddress; address aTokenAddress = reserve.aTokenAddress;
//check that the reserve has enough available liquidity
uint256 availableLiquidityBefore = IERC20(asset).balanceOf(aTokenAddress);
//calculate amount fee //calculate amount fee
uint256 amountFee = amount.mul(FLASHLOAN_FEE_TOTAL).div(10000); uint256 amountFee = amount.mul(FLASHLOAN_FEE_TOTAL).div(10000);
require(
availableLiquidityBefore >= amount,
'There is not enough liquidity available to borrow'
);
require(amountFee > 0, 'The requested amount is too small for a FlashLoan.'); require(amountFee > 0, 'The requested amount is too small for a FlashLoan.');
//get the FlashLoanReceiver instance //get the FlashLoanReceiver instance
@ -480,21 +473,12 @@ contract LendingPool is VersionedInitializable, ILendingPool {
//execute action of the receiver //execute action of the receiver
receiver.executeOperation(asset, aTokenAddress, amount, amountFee, params); receiver.executeOperation(asset, aTokenAddress, amount, amountFee, params);
//check that the actual balance of the core contract includes the returned amount //transfer from the receiver the amount plus the fee
uint256 availableLiquidityAfter = IERC20(asset).balanceOf(aTokenAddress); IERC20(asset).safeTransferFrom(receiver, aTokenAddress, amount.add(amountFee));
require(
availableLiquidityAfter == availableLiquidityBefore.add(amountFee),
'The actual balance of the protocol is inconsistent'
);
//compounding the cumulated interest //compounding the cumulated interest
reserve.updateCumulativeIndexesAndTimestamp(); reserve.updateCumulativeIndexesAndTimestamp();
uint256 totalLiquidityBefore = availableLiquidityBefore
.add(IERC20(reserve.variableDebtTokenAddress).totalSupply())
.add(IERC20(reserve.stableDebtTokenAddress).totalSupply());
//compounding the received fee into the reserve //compounding the received fee into the reserve
reserve.cumulateToLiquidityIndex(totalLiquidityBefore, amountFee); reserve.cumulateToLiquidityIndex(totalLiquidityBefore, amountFee);