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The3D 2020-11-25 13:41:09 +01:00
parent ba516a10d0
commit ee11faa573
1 changed files with 17 additions and 17 deletions
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34
contracts/protocol/lendingpool/LendingPoolCollateralManager.sol
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@ -42,8 +42,8 @@ contract LendingPoolCollateralManager is
uint256 userCollateralBalance; uint256 userCollateralBalance;
uint256 userStableDebt; uint256 userStableDebt;
uint256 userVariableDebt; uint256 userVariableDebt;
uint256 maxDebtToLiquidate; uint256 maxLiquidatableDebt;
uint256 actualAmountToLiquidate; uint256 actualDebtToLiquidate;
uint256 liquidationRatio; uint256 liquidationRatio;
uint256 maxAmountCollateralToLiquidate; uint256 maxAmountCollateralToLiquidate;
uint256 userStableRate; uint256 userStableRate;
@ -67,7 +67,7 @@ contract LendingPoolCollateralManager is
} }
/** /**
* @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1 * @dev Function to liquidate a position if its Health Factor drops below 1
* - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives * - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
* a proportionally amount of the `collateralAsset` plus a bonus to cover market risk * a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
* @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
@ -118,12 +118,12 @@ contract LendingPoolCollateralManager is
vars.userCollateralBalance = vars.collateralAtoken.balanceOf(user); vars.userCollateralBalance = vars.collateralAtoken.balanceOf(user);
vars.maxDebtToLiquidate = vars.userStableDebt.add(vars.userVariableDebt).percentMul( vars.maxLiquidatableDebt = vars.userStableDebt.add(vars.userVariableDebt).percentMul(
LIQUIDATION_CLOSE_FACTOR_PERCENT LIQUIDATION_CLOSE_FACTOR_PERCENT
); );
vars.actualAmountToLiquidate = debtToCover > vars.maxDebtToLiquidate vars.actualDebtToLiquidate = debtToCover > vars.maxLiquidatableDebt
? vars.maxDebtToLiquidate ? vars.maxLiquidatableDebt
: debtToCover; : debtToCover;
( (
@ -134,16 +134,16 @@ contract LendingPoolCollateralManager is
debtReserve, debtReserve,
collateralAsset, collateralAsset,
debtAsset, debtAsset,
vars.actualAmountToLiquidate, vars.actualDebtToLiquidate,
vars.userCollateralBalance vars.userCollateralBalance
); );
// If debtAmountNeeded < vars.actualAmountToLiquidate, there isn't enough // If debtAmountNeeded < actualDebtToLiquidate, there isn't enough
// collateral to cover the actual amount that is being liquidated, hence we liquidate // collateral to cover the actual amount that is being liquidated, hence we liquidate
// a smaller amount // a smaller amount
if (vars.debtAmountNeeded < vars.actualAmountToLiquidate) { if (vars.debtAmountNeeded < vars.actualDebtToLiquidate) {
vars.actualAmountToLiquidate = vars.debtAmountNeeded; vars.actualDebtToLiquidate = vars.debtAmountNeeded;
} }
// If the liquidator reclaims the underlying asset, we make sure there is enough available liquidity in the // If the liquidator reclaims the underlying asset, we make sure there is enough available liquidity in the
@ -161,10 +161,10 @@ contract LendingPoolCollateralManager is
debtReserve.updateState(); debtReserve.updateState();
if (vars.userVariableDebt >= vars.actualAmountToLiquidate) { if (vars.userVariableDebt >= vars.actualDebtToLiquidate) {
IVariableDebtToken(debtReserve.variableDebtTokenAddress).burn( IVariableDebtToken(debtReserve.variableDebtTokenAddress).burn(
user, user,
vars.actualAmountToLiquidate, vars.actualDebtToLiquidate,
debtReserve.variableBorrowIndex debtReserve.variableBorrowIndex
); );
} else { } else {
@ -178,14 +178,14 @@ contract LendingPoolCollateralManager is
} }
IStableDebtToken(debtReserve.stableDebtTokenAddress).burn( IStableDebtToken(debtReserve.stableDebtTokenAddress).burn(
user, user,
vars.actualAmountToLiquidate.sub(vars.userVariableDebt) vars.actualDebtToLiquidate.sub(vars.userVariableDebt)
); );
} }
debtReserve.updateInterestRates( debtReserve.updateInterestRates(
debtAsset, debtAsset,
debtReserve.aTokenAddress, debtReserve.aTokenAddress,
vars.actualAmountToLiquidate, vars.actualDebtToLiquidate,
0 0
); );
@ -220,14 +220,14 @@ contract LendingPoolCollateralManager is
IERC20(debtAsset).safeTransferFrom( IERC20(debtAsset).safeTransferFrom(
msg.sender, msg.sender,
debtReserve.aTokenAddress, debtReserve.aTokenAddress,
vars.actualAmountToLiquidate vars.actualDebtToLiquidate
); );
emit LiquidationCall( emit LiquidationCall(
collateralAsset, collateralAsset,
debtAsset, debtAsset,
user, user,
vars.actualAmountToLiquidate, vars.actualDebtToLiquidate,
vars.maxCollateralToLiquidate, vars.maxCollateralToLiquidate,
msg.sender, msg.sender,
receiveAToken receiveAToken
@ -284,7 +284,7 @@ contract LendingPoolCollateralManager is
vars.debtAssetDecimals = debtReserve.configuration.getDecimals(); vars.debtAssetDecimals = debtReserve.configuration.getDecimals();
// This is the maximum possible amount of the selected collateral that can be liquidated, given the // This is the maximum possible amount of the selected collateral that can be liquidated, given the
// max amount of debt that is available for liquidation // max amount of liquidatable debt
vars.maxAmountCollateralToLiquidate = vars vars.maxAmountCollateralToLiquidate = vars
.debtAssetPrice .debtAssetPrice
.mul(debtToCover) .mul(debtToCover)