Merge pull request #197 from aave/protocol-2.5-fixes

Consolidated fixes for protocol 2.5

contracts/interfaces/ILendingPool.sol

@@ -366,9 +366,9 @@ interface ILendingPool {
   /**
    * @dev Returns the user account data across all the reserves
    * @param user The address of the user
-   * @return totalCollateralETH the total collateral in ETH of the user
+   * @return totalCollateralBase the total collateral of the user in the base currency used by the price feed
-   * @return totalDebtETH the total debt in ETH of the user
+   * @return totalDebtBase the total debt of the user in the base currency used by the price feed
-   * @return availableBorrowsETH the borrowing power left of the user
+   * @return availableBorrowsBase the borrowing power left of the user in the base currency used by the price feed
    * @return currentLiquidationThreshold the liquidation threshold of the user
    * @return ltv the loan to value of the user
    * @return healthFactor the current health factor of the user
@@ -377,9 +377,9 @@ interface ILendingPool {
     external
     view
     returns (
-      uint256 totalCollateralETH,
+      uint256 totalCollateralBase,
-      uint256 totalDebtETH,
+      uint256 totalDebtBase,
-      uint256 availableBorrowsETH,
+      uint256 availableBorrowsBase,
       uint256 currentLiquidationThreshold,
       uint256 ltv,
       uint256 healthFactor

contracts/interfaces/IStableDebtToken.sol

@@ -69,6 +69,26 @@ interface IStableDebtToken is IInitializableDebtToken {
     uint256 rate
   ) external returns (bool);
 
+  /**
+   * @dev implements the credit delegation with ERC712 signature
+   * @param delegator The delegator of the credit
+   * @param delegatee The delegatee that can use the credit
+   * @param value The amount to be delegated
+   * @param deadline The deadline timestamp, type(uint256).max for max deadline
+   * @param v Signature param
+   * @param s Signature param
+   * @param r Signature param
+   */
+  function permitDelegation(
+    address delegator,
+    address delegatee,
+    uint256 value,
+    uint256 deadline,
+    uint8 v,
+    bytes32 r,
+    bytes32 s
+  ) external;
+
   /**
    * @dev Burns debt of `user`
    * - The resulting rate is the weighted average between the rate of the new debt

contracts/interfaces/IVariableDebtToken.sol

@@ -36,6 +36,26 @@ interface IVariableDebtToken is IScaledBalanceToken, IInitializableDebtToken {
     uint256 index
   ) external returns (bool);
 
+  /**
+   * @dev implements the credit delegation with ERC712 signature
+   * @param delegator The delegator of the credit
+   * @param delegatee The delegatee that can use the credit
+   * @param value The amount to be delegated
+   * @param deadline The deadline timestamp, type(uint256).max for max deadline
+   * @param v Signature param
+   * @param s Signature param
+   * @param r Signature param
+   */
+  function permitDelegation(
+    address delegator,
+    address delegatee,
+    uint256 value,
+    uint256 deadline,
+    uint8 v,
+    bytes32 r,
+    bytes32 s
+  ) external;
+
   /**
    * @dev Emitted when variable debt is burnt
    * @param user The user which debt has been burned

contracts/misc/AaveOracle.sol

@@ -18,29 +18,34 @@ import {SafeERC20} from '../dependencies/openzeppelin/contracts/SafeERC20.sol';
 contract AaveOracle is IPriceOracleGetter, Ownable {
   using SafeERC20 for IERC20;
 
-  event WethSet(address indexed weth);
+  event BaseCurrencySet(address indexed baseCurrency, uint256 baseCurrencyUnit);
   event AssetSourceUpdated(address indexed asset, address indexed source);
   event FallbackOracleUpdated(address indexed fallbackOracle);
 
   mapping(address => IChainlinkAggregator) private assetsSources;
   IPriceOracleGetter private _fallbackOracle;
-  address public immutable WETH;
+  address public immutable BASE_CURRENCY;
+  uint256 public immutable BASE_CURRENCY_UNIT;
 
   /// @notice Constructor
   /// @param assets The addresses of the assets
   /// @param sources The address of the source of each asset
   /// @param fallbackOracle The address of the fallback oracle to use if the data of an
   ///        aggregator is not consistent
+  /// @param baseCurrency the base currency used for the price quotes. If USD is used, base currency is 0x0
+  /// @param baseCurrencyUnit the unit of the base currency
   constructor(
     address[] memory assets,
     address[] memory sources,
     address fallbackOracle,
-    address weth
+    address baseCurrency,
+    uint256 baseCurrencyUnit
   ) public {
     _setFallbackOracle(fallbackOracle);
     _setAssetsSources(assets, sources);
-    WETH = weth;
+    BASE_CURRENCY = baseCurrency;
-    emit WethSet(weth);
+    BASE_CURRENCY_UNIT = baseCurrencyUnit;
+    emit BaseCurrencySet(baseCurrency, baseCurrencyUnit);
   }
 
   /// @notice External function called by the Aave governance to set or replace sources of assets
@@ -83,8 +88,8 @@ contract AaveOracle is IPriceOracleGetter, Ownable {
   function getAssetPrice(address asset) public view override returns (uint256) {
     IChainlinkAggregator source = assetsSources[asset];
 
-    if (asset == WETH) {
+    if (asset == BASE_CURRENCY) {
-      return 1 ether;
+      return BASE_CURRENCY_UNIT;
     } else if (address(source) == address(0)) {
       return _fallbackOracle.getAssetPrice(asset);
     } else {

contracts/mocks/upgradeability/MockStableDebtToken.sol

@@ -5,6 +5,6 @@ import {StableDebtToken} from '../../protocol/tokenization/StableDebtToken.sol';
 
 contract MockStableDebtToken is StableDebtToken {
   function getRevision() internal pure override returns (uint256) {
-    return 0x2;
+    return 0x3;
   }
 }

contracts/mocks/upgradeability/MockVariableDebtToken.sol

@@ -5,6 +5,6 @@ import {VariableDebtToken} from '../../protocol/tokenization/VariableDebtToken.s
 
 contract MockVariableDebtToken is VariableDebtToken {
   function getRevision() internal pure override returns (uint256) {
-    return 0x2;
+    return 0x3;
   }
 }

contracts/protocol/lendingpool/LendingPool.sol

@@ -473,17 +473,17 @@ contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage
     view
     override
     returns (
-      uint256 totalCollateralETH,
+      uint256 totalCollateralBase,
-      uint256 totalDebtETH,
+      uint256 totalDebtBase,
-      uint256 availableBorrowsETH,
+      uint256 availableBorrowsBase,
       uint256 currentLiquidationThreshold,
       uint256 ltv,
       uint256 healthFactor
     )
   {
     (
-      totalCollateralETH,
+      totalCollateralBase,
-      totalDebtETH,
+      totalDebtBase,
       ltv,
       currentLiquidationThreshold,
       healthFactor,
@@ -497,9 +497,9 @@ contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage
       _addressesProvider.getPriceOracle()
     );
 
-    availableBorrowsETH = GenericLogic.calculateAvailableBorrowsETH(
+    availableBorrowsBase = GenericLogic.calculateAvailableBorrows(
-      totalCollateralETH,
+      totalCollateralBase,
-      totalDebtETH,
+      totalDebtBase,
       ltv
     );
   }

contracts/protocol/libraries/helpers/Errors.sol

@@ -112,7 +112,6 @@ library Errors {
   string public constant RL_ATOKEN_SUPPLY_NOT_ZERO = '88';
   string public constant RL_STABLE_DEBT_NOT_ZERO = '89';
   string public constant RL_VARIABLE_DEBT_SUPPLY_NOT_ZERO = '90';
-  string public constant LP_CALLER_NOT_EOA = '91';
   string public constant VL_LTV_VALIDATION_FAILED = '93';
   string public constant VL_SAME_BLOCK_BORROW_REPAY = '94';
   string public constant LPC_FLASHLOAN_PREMIUMS_MISMATCH = '95';

contracts/protocol/libraries/logic/GenericLogic.sol

@@ -32,17 +32,17 @@ library GenericLogic {
     uint256 assetPrice;
     uint256 assetUnit;
     uint256 userBalance;
-    uint256 userBalanceETH;
+    uint256 userBalanceInBaseCurrency;
     uint256 userDebt;
     uint256 userStableDebt;
-    uint256 userDebtETH;
+    uint256 userDebtInBaseCurrency;
     uint256 decimals;
     uint256 ltv;
     uint256 liquidationThreshold;
     uint256 i;
     uint256 healthFactor;
-    uint256 totalCollateralInETH;
+    uint256 totalCollateralInBaseCurrency;
-    uint256 totalDebtInETH;
+    uint256 totalDebtInBaseCurrency;
     uint256 avgLtv;
     uint256 avgLiquidationThreshold;
     uint256 normalizedIncome;
@@ -53,14 +53,15 @@ library GenericLogic {
 
   /**
    * @dev Calculates the user data across the reserves.
-   * this includes the total liquidity/collateral/borrow balances in ETH,
+   * this includes the total liquidity/collateral/borrow balances in the base currency used by the price feed,
    * the average Loan To Value, the average Liquidation Ratio, and the Health factor.
    * @param user The address of the user
    * @param reservesData Data of all the reserves
    * @param userConfig The configuration of the user
    * @param reserves The list of the available reserves
    * @param oracle The price oracle address
-   * @return The total collateral and total debt of the user in ETH, the avg ltv, liquidation threshold, the HF and the uncapped avg ltv
+   * @return The total collateral and total debt of the user in the base currency used by the price feed,
+   *         the avg ltv, liquidation threshold, the HF and the uncapped avg ltv
    **/
   function calculateUserAccountData(
     address user,
@@ -109,13 +110,16 @@ library GenericLogic {
         vars.userBalance = IScaledBalanceToken(currentReserve.aTokenAddress).scaledBalanceOf(user);
         vars.userBalance = vars.userBalance.rayMul(vars.normalizedIncome);
 
-        vars.userBalanceETH = vars.assetPrice.mul(vars.userBalance).div(vars.assetUnit);
+        vars.userBalanceInBaseCurrency = vars.assetPrice.mul(vars.userBalance).div(vars.assetUnit);
-        vars.totalCollateralInETH = vars.totalCollateralInETH.add(vars.userBalanceETH);
+        vars.totalCollateralInBaseCurrency = vars.totalCollateralInBaseCurrency.add(
+          vars.userBalanceInBaseCurrency
+        );
 
-        vars.avgLtv = vars.avgLtv.add(vars.userBalanceETH.mul(vars.ltv));
+        vars.avgLtv = vars.avgLtv.add(vars.userBalanceInBaseCurrency.mul(vars.ltv));
         vars.hasZeroLtvCollateral = vars.hasZeroLtvCollateral || vars.ltv == 0;
+
         vars.avgLiquidationThreshold = vars.avgLiquidationThreshold.add(
-          vars.userBalanceETH.mul(vars.liquidationThreshold)
+          vars.userBalanceInBaseCurrency.mul(vars.liquidationThreshold)
         );
       }
 
@@ -129,24 +133,28 @@ library GenericLogic {
           vars.userDebt = vars.userDebt.rayMul(vars.normalizedDebt);
         }
         vars.userDebt = vars.userDebt.add(vars.userStableDebt);
-        vars.userDebtETH = vars.assetPrice.mul(vars.userDebt).div(vars.assetUnit);
+        vars.userDebtInBaseCurrency = vars.assetPrice.mul(vars.userDebt).div(vars.assetUnit);
-        vars.totalDebtInETH = vars.totalDebtInETH.add(vars.userDebtETH);
+        vars.totalDebtInBaseCurrency = vars.totalDebtInBaseCurrency.add(
+          vars.userDebtInBaseCurrency
+        );
       }
     }
 
-    vars.avgLtv = vars.totalCollateralInETH > 0 ? vars.avgLtv.div(vars.totalCollateralInETH) : 0;
+    vars.avgLtv = vars.totalCollateralInBaseCurrency > 0
-    vars.avgLiquidationThreshold = vars.totalCollateralInETH > 0
+      ? vars.avgLtv.div(vars.totalCollateralInBaseCurrency)
-      ? vars.avgLiquidationThreshold.div(vars.totalCollateralInETH)
+      : 0;
+    vars.avgLiquidationThreshold = vars.totalCollateralInBaseCurrency > 0
+      ? vars.avgLiquidationThreshold.div(vars.totalCollateralInBaseCurrency)
       : 0;
 
     vars.healthFactor = calculateHealthFactorFromBalances(
-      vars.totalCollateralInETH,
+      vars.totalCollateralInBaseCurrency,
-      vars.totalDebtInETH,
+      vars.totalDebtInBaseCurrency,
       vars.avgLiquidationThreshold
     );
     return (
-      vars.totalCollateralInETH,
+      vars.totalCollateralInBaseCurrency,
-      vars.totalDebtInETH,
+      vars.totalDebtInBaseCurrency,
       vars.avgLtv,
       vars.avgLiquidationThreshold,
       vars.healthFactor,
@@ -156,43 +164,46 @@ library GenericLogic {
 
   /**
    * @dev Calculates the health factor from the corresponding balances
-   * @param totalCollateralInETH The total collateral in ETH
+   * @param totalCollateralInBaseCurrency The total collateral in the base currency used by the price feed
-   * @param totalDebtInETH The total debt in ETH
+   * @param totalDebtInBaseCurrency The total debt in the base currency used by the price feed
    * @param liquidationThreshold The avg liquidation threshold
    * @return The health factor calculated from the balances provided
    **/
   function calculateHealthFactorFromBalances(
-    uint256 totalCollateralInETH,
+    uint256 totalCollateralInBaseCurrency,
-    uint256 totalDebtInETH,
+    uint256 totalDebtInBaseCurrency,
     uint256 liquidationThreshold
   ) internal pure returns (uint256) {
-    if (totalDebtInETH == 0) return uint256(-1);
+    if (totalDebtInBaseCurrency == 0) return uint256(-1);
 
-    return (totalCollateralInETH.percentMul(liquidationThreshold)).wadDiv(totalDebtInETH);
+    return
+      (totalCollateralInBaseCurrency.percentMul(liquidationThreshold)).wadDiv(
+        totalDebtInBaseCurrency
+      );
   }
 
   /**
-   * @dev Calculates the equivalent amount in ETH that an user can borrow, depending on the available collateral and the
+   * @dev Calculates the maximum amount that can be borrowed depending on the available collateral, the total debt and the
    * average Loan To Value
-   * @param totalCollateralInETH The total collateral in ETH
+   * @param totalCollateralInBaseCurrency The total collateral in the base currency used by the price feed
-   * @param totalDebtInETH The total borrow balance
+   * @param totalDebtInBaseCurrency The total borrow balance in the base currency used by the price feed
    * @param ltv The average loan to value
-   * @return the amount available to borrow in ETH for the user
+   * @return the amount available to borrow in the base currency of the used by the price feed
    **/
 
-  function calculateAvailableBorrowsETH(
+  function calculateAvailableBorrows(
-    uint256 totalCollateralInETH,
+    uint256 totalCollateralInBaseCurrency,
-    uint256 totalDebtInETH,
+    uint256 totalDebtInBaseCurrency,
     uint256 ltv
   ) internal pure returns (uint256) {
-    uint256 availableBorrowsETH = totalCollateralInETH.percentMul(ltv);
+    uint256 availableBorrowsInBaseCurrency = totalCollateralInBaseCurrency.percentMul(ltv);
 
-    if (availableBorrowsETH < totalDebtInETH) {
+    if (availableBorrowsInBaseCurrency < totalDebtInBaseCurrency) {
       return 0;
     }
 
-    availableBorrowsETH = availableBorrowsETH.sub(totalDebtInETH);
+    availableBorrowsInBaseCurrency = availableBorrowsInBaseCurrency.sub(totalDebtInBaseCurrency);
-    return availableBorrowsETH;
+    return availableBorrowsInBaseCurrency;
   }
 
   /**

contracts/protocol/libraries/logic/ReserveLogic.sol

@@ -218,7 +218,7 @@ library ReserveLogic {
     );
   }
 
-  struct MintToTreasuryLocalVars {
+  struct AccrueToTreasuryLocalVars {
     uint256 prevTotalStableDebt;
     uint256 prevTotalVariableDebt;
     uint256 currTotalVariableDebt;
@@ -240,7 +240,7 @@ library ReserveLogic {
     DataTypes.ReserveData storage reserve,
     DataTypes.ReserveCache memory reserveCache
   ) internal {
-    MintToTreasuryLocalVars memory vars;
+    AccrueToTreasuryLocalVars memory vars;
 
     vars.reserveFactor = reserveCache.reserveConfiguration.getReserveFactorMemory();
 

contracts/protocol/libraries/logic/ValidationLogic.sol

@@ -92,16 +92,16 @@ library ValidationLogic {
   struct ValidateBorrowLocalVars {
     uint256 currentLtv;
     uint256 currentLiquidationThreshold;
-    uint256 amountOfCollateralNeededETH;
+    uint256 collateralNeededInBaseCurrency;
-    uint256 userCollateralBalanceETH;
+    uint256 userCollateralInBaseCurrency;
-    uint256 userBorrowBalanceETH;
+    uint256 userDebtInBaseCurrency;
     uint256 availableLiquidity;
     uint256 healthFactor;
     uint256 totalDebt;
     uint256 totalSupplyVariableDebt;
     uint256 reserveDecimals;
     uint256 borrowCap;
-    uint256 amountInETH;
+    uint256 amountInBaseCurrency;
     bool isActive;
     bool isFrozen;
     bool isPaused;
@@ -181,8 +181,8 @@ library ValidationLogic {
     }
 
     (
-      vars.userCollateralBalanceETH,
+      vars.userCollateralInBaseCurrency,
-      vars.userBorrowBalanceETH,
+      vars.userDebtInBaseCurrency,
       vars.currentLtv,
       vars.currentLiquidationThreshold,
       vars.healthFactor,
@@ -196,23 +196,23 @@ library ValidationLogic {
       oracle
     );
 
-    require(vars.userCollateralBalanceETH > 0, Errors.VL_COLLATERAL_BALANCE_IS_0);
+    require(vars.userCollateralInBaseCurrency > 0, Errors.VL_COLLATERAL_BALANCE_IS_0);
 
     require(
       vars.healthFactor > GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD,
       Errors.VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD
     );
 
-    vars.amountInETH = IPriceOracleGetter(oracle).getAssetPrice(asset);
+    vars.amountInBaseCurrency = IPriceOracleGetter(oracle).getAssetPrice(asset);
-    vars.amountInETH = vars.amountInETH.mul(amount).div(10**vars.reserveDecimals);
+    vars.amountInBaseCurrency = vars.amountInBaseCurrency.mul(amount).div(10**vars.reserveDecimals);
 
     //add the current already borrowed amount to the amount requested to calculate the total collateral needed.
-    vars.amountOfCollateralNeededETH = vars.userBorrowBalanceETH.add(vars.amountInETH).percentDiv(
+    vars.collateralNeededInBaseCurrency = vars.userDebtInBaseCurrency.add(vars.amountInBaseCurrency).percentDiv(
       vars.currentLtv
     ); //LTV is calculated in percentage
 
     require(
-      vars.amountOfCollateralNeededETH <= vars.userCollateralBalanceETH,
+      vars.collateralNeededInBaseCurrency <= vars.userCollateralInBaseCurrency,
       Errors.VL_COLLATERAL_CANNOT_COVER_NEW_BORROW
     );
 
@@ -355,9 +355,6 @@ library ValidationLogic {
     IERC20 variableDebtToken,
     address aTokenAddress
   ) external view {
-    // to avoid potential abuses using flashloans, the rebalance stable rate must happen through an EOA
-    require(!address(msg.sender).isContract(), Errors.LP_CALLER_NOT_EOA);
-
     (bool isActive, , , , bool isPaused) = reserveCache.reserveConfiguration.getFlagsMemory();
 
     require(isActive, Errors.VL_NO_ACTIVE_RESERVE);

contracts/protocol/tokenization/StableDebtToken.sol

@@ -18,7 +18,15 @@ import {Errors} from '../libraries/helpers/Errors.sol';
 contract StableDebtToken is IStableDebtToken, DebtTokenBase {
   using WadRayMath for uint256;
 
-  uint256 public constant DEBT_TOKEN_REVISION = 0x1;
+  bytes public constant EIP712_REVISION = bytes('1');
+  bytes32 internal constant EIP712_DOMAIN =
+    keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)');
+  bytes32 public constant PERMIT_DELEGATION_TYPEHASH =
+    keccak256(
+      'PermitDelegation(address delegator,address delegatee,uint256 value,uint256 nonce,uint256 deadline)'
+    );
+
+  uint256 public constant DEBT_TOKEN_REVISION = 0x2;
 
   uint256 internal _avgStableRate;
   mapping(address => uint40) internal _timestamps;
@@ -29,6 +37,9 @@ contract StableDebtToken is IStableDebtToken, DebtTokenBase {
   address internal _underlyingAsset;
   IAaveIncentivesController internal _incentivesController;
 
+  mapping(address => uint256) public _nonces;
+  bytes32 public DOMAIN_SEPARATOR;
+
   /**
    * @dev Initializes the debt token.
    * @param pool The address of the lending pool where this aToken will be used
@@ -47,6 +58,13 @@ contract StableDebtToken is IStableDebtToken, DebtTokenBase {
     string memory debtTokenSymbol,
     bytes calldata params
   ) public override initializer {
+    uint256 chainId;
+
+    //solium-disable-next-line
+    assembly {
+      chainId := chainid()
+    }
+
     _setName(debtTokenName);
     _setSymbol(debtTokenSymbol);
     _setDecimals(debtTokenDecimals);
@@ -55,6 +73,16 @@ contract StableDebtToken is IStableDebtToken, DebtTokenBase {
     _underlyingAsset = underlyingAsset;
     _incentivesController = incentivesController;
 
+    DOMAIN_SEPARATOR = keccak256(
+      abi.encode(
+        EIP712_DOMAIN,
+        keccak256(bytes(debtTokenName)),
+        keccak256(EIP712_REVISION),
+        chainId,
+        address(this)
+      )
+    );
+
     emit Initialized(
       underlyingAsset,
       address(pool),
@@ -256,6 +284,51 @@ contract StableDebtToken is IStableDebtToken, DebtTokenBase {
     emit Transfer(user, address(0), amount);
   }
 
+  /**
+   * @dev implements the credit delegation with ERC712 signature
+   * @param delegator The delegator of the credit
+   * @param delegatee The delegatee that can use the credit
+   * @param value The amount to be delegated
+   * @param deadline The deadline timestamp, type(uint256).max for max deadline
+   * @param v Signature param
+   * @param s Signature param
+   * @param r Signature param
+   */
+  function permitDelegation(
+    address delegator,
+    address delegatee,
+    uint256 value,
+    uint256 deadline,
+    uint8 v,
+    bytes32 r,
+    bytes32 s
+  ) external override {
+    require(delegator != address(0), 'INVALID_DELEGATOR');
+    //solium-disable-next-line
+    require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
+    uint256 currentValidNonce = _nonces[delegator];
+    bytes32 digest =
+      keccak256(
+        abi.encodePacked(
+          '\x19\x01',
+          DOMAIN_SEPARATOR,
+          keccak256(
+            abi.encode(
+              PERMIT_DELEGATION_TYPEHASH,
+              delegator,
+              delegatee,
+              value,
+              currentValidNonce,
+              deadline
+            )
+          )
+        )
+      );
+    require(delegator == ecrecover(digest, v, r, s), 'INVALID_SIGNATURE');
+    _nonces[delegator] = currentValidNonce.add(1);
+    _approveDelegation(delegator, delegatee, value);
+  }
+
   /**
    * @dev Calculates the increase in balance since the last user interaction
    * @param user The address of the user for which the interest is being accumulated

contracts/protocol/tokenization/VariableDebtToken.sol

@@ -17,12 +17,23 @@ import {IAaveIncentivesController} from '../../interfaces/IAaveIncentivesControl
 contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
   using WadRayMath for uint256;
 
-  uint256 public constant DEBT_TOKEN_REVISION = 0x1;
+  bytes public constant EIP712_REVISION = bytes('1');
+  bytes32 internal constant EIP712_DOMAIN =
+    keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)');
+  bytes32 public constant PERMIT_DELEGATION_TYPEHASH =
+    keccak256(
+      'PermitDelegation(address delegator,address delegatee,uint256 value,uint256 nonce,uint256 deadline)'
+    );
+
+  uint256 public constant DEBT_TOKEN_REVISION = 0x2;
 
   ILendingPool internal _pool;
   address internal _underlyingAsset;
   IAaveIncentivesController internal _incentivesController;
 
+  mapping(address => uint256) public _nonces;
+  bytes32 public DOMAIN_SEPARATOR;
+
   /**
    * @dev Initializes the debt token.
    * @param pool The address of the lending pool where this aToken will be used
@@ -41,6 +52,13 @@ contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
     string memory debtTokenSymbol,
     bytes calldata params
   ) public override initializer {
+    uint256 chainId;
+
+    //solium-disable-next-line
+    assembly {
+      chainId := chainid()
+    }
+
     _setName(debtTokenName);
     _setSymbol(debtTokenSymbol);
     _setDecimals(debtTokenDecimals);
@@ -49,6 +67,16 @@ contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
     _underlyingAsset = underlyingAsset;
     _incentivesController = incentivesController;
 
+    DOMAIN_SEPARATOR = keccak256(
+      abi.encode(
+        EIP712_DOMAIN,
+        keccak256(bytes(debtTokenName)),
+        keccak256(EIP712_REVISION),
+        chainId,
+        address(this)
+      )
+    );
+
     emit Initialized(
       underlyingAsset,
       address(pool),
@@ -135,6 +163,51 @@ contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
     emit Burn(user, amount, index);
   }
 
+  /**
+   * @dev implements the credit delegation with ERC712 signature
+   * @param delegator The delegator of the credit
+   * @param delegatee The delegatee that can use the credit
+   * @param value The amount to be delegated
+   * @param deadline The deadline timestamp, type(uint256).max for max deadline
+   * @param v Signature param
+   * @param s Signature param
+   * @param r Signature param
+   */
+  function permitDelegation(
+    address delegator,
+    address delegatee,
+    uint256 value,
+    uint256 deadline,
+    uint8 v,
+    bytes32 r,
+    bytes32 s
+  ) external override {
+    require(delegator != address(0), 'INVALID_DELEGATOR');
+    //solium-disable-next-line
+    require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
+    uint256 currentValidNonce = _nonces[delegator];
+    bytes32 digest =
+      keccak256(
+        abi.encodePacked(
+          '\x19\x01',
+          DOMAIN_SEPARATOR,
+          keccak256(
+            abi.encode(
+              PERMIT_DELEGATION_TYPEHASH,
+              delegator,
+              delegatee,
+              value,
+              currentValidNonce,
+              deadline
+            )
+          )
+        )
+      );
+    require(delegator == ecrecover(digest, v, r, s), 'INVALID_SIGNATURE');
+    _nonces[delegator] = currentValidNonce.add(1);
+    _approveDelegation(delegator, delegatee, value);
+  }
+
   /**
    * @dev Returns the principal debt balance of the user from
    * @return The debt balance of the user since the last burn/mint action

contracts/protocol/tokenization/base/DebtTokenBase.sol

@@ -38,8 +38,7 @@ abstract contract DebtTokenBase is
    * force a delegator HF to go below 1)
    **/
   function approveDelegation(address delegatee, uint256 amount) external override {
-    _borrowAllowances[_msgSender()][delegatee] = amount;
+    _approveDelegation(_msgSender(), delegatee, amount);
-    emit BorrowAllowanceDelegated(_msgSender(), delegatee, _getUnderlyingAssetAddress(), amount);
   }
 
   /**
@@ -118,6 +117,15 @@ abstract contract DebtTokenBase is
     revert('ALLOWANCE_NOT_SUPPORTED');
   }
 
+  function _approveDelegation(
+    address delegator,
+    address delegatee,
+    uint256 amount
+  ) internal {
+    _borrowAllowances[delegator][delegatee] = amount;
+    emit BorrowAllowanceDelegated(delegator, delegatee, _getUnderlyingAssetAddress(), amount);
+  }
+
   function _decreaseBorrowAllowance(
     address delegator,
     address delegatee,

helpers/contracts-deployments.ts

@@ -1,4 +1,4 @@
-import { Contract } from 'ethers';
+import { BigNumberish, Contract } from 'ethers';
 import { DRE } from './misc-utils';
 import {
   tEthereumAddress,
@@ -188,8 +188,8 @@ export const deployAaveLibraries = async (
   return {
     ['__$de8c0cf1a7d7c36c802af9a64fb9d86036$__']: validationLogic.address,
     ['__$22cd43a9dda9ce44e9b92ba393b88fb9ac$__']: reserveLogic.address,
-    ["__$52a8a86ab43135662ff256bbc95497e8e3$__"]: genericLogic.address,
+    ['__$52a8a86ab43135662ff256bbc95497e8e3$__']: genericLogic.address,
-  }
+  };
 };
 
 export const deployLendingPool = async (verify?: boolean) => {
@@ -224,7 +224,7 @@ export const deployMockAggregator = async (price: tStringTokenSmallUnits, verify
   );
 
 export const deployAaveOracle = async (
-  args: [tEthereumAddress[], tEthereumAddress[], tEthereumAddress, tEthereumAddress],
+  args: [tEthereumAddress[], tEthereumAddress[], tEthereumAddress, tEthereumAddress, string],
   verify?: boolean
 ) =>
   withSaveAndVerify(

helpers/contracts-helpers.ts

@@ -142,14 +142,8 @@ export const linkBytecode = (artifact: BuidlerArtifact | Artifact, libraries: an
 };
 
 export const getParamPerNetwork = <T>(param: iParamsPerNetwork<T>, network: eNetwork) => {
-  const {
+  const { main, ropsten, kovan, coverage, buidlerevm, tenderlyMain } =
-    main,
+    param as iEthereumParamsPerNetwork<T>;
-    ropsten,
-    kovan,
-    coverage,
-    buidlerevm,
-    tenderlyMain,
-  } = param as iEthereumParamsPerNetwork<T>;
   const { matic, mumbai } = param as iPolygonParamsPerNetwork<T>;
   const { xdai } = param as iXDaiParamsPerNetwork<T>;
   if (process.env.FORK) {
@@ -327,6 +321,48 @@ export const buildFlashLiquidationAdapterParams = (
   );
 };
 
+export const buildPermitDelegationParams = (
+  chainId: number,
+  token: tEthereumAddress,
+  revision: string,
+  tokenName: string,
+  delegator: tEthereumAddress,
+  delegatee: tEthereumAddress,
+  nonce: number,
+  deadline: string,
+  value: tStringTokenSmallUnits
+) => ({
+  types: {
+    EIP712Domain: [
+      { name: 'name', type: 'string' },
+      { name: 'version', type: 'string' },
+      { name: 'chainId', type: 'uint256' },
+      { name: 'verifyingContract', type: 'address' },
+    ],
+    PermitDelegation: [
+      { name: 'delegator', type: 'address' },
+      { name: 'delegatee', type: 'address' },
+      { name: 'value', type: 'uint256' },
+      { name: 'nonce', type: 'uint256' },
+      { name: 'deadline', type: 'uint256' },
+    ],
+  },
+  primaryType: 'PermitDelegation' as const,
+  domain: {
+    name: tokenName,
+    version: revision,
+    chainId: chainId,
+    verifyingContract: token,
+  },
+  message: {
+    delegator,
+    delegatee,
+    value,
+    nonce,
+    deadline,
+  },
+});
+
 export const verifyContract = async (
   id: string,
   instance: Contract,

helpers/types.ts

@@ -187,7 +187,6 @@ export enum ProtocolErrors {
   RL_ATOKEN_SUPPLY_NOT_ZERO = '88',
   RL_STABLE_DEBT_NOT_ZERO = '89',
   RL_VARIABLE_DEBT_SUPPLY_NOT_ZERO = '90',
-  LP_CALLER_NOT_EOA = '91',
   VL_LTV_VALIDATION_FAILED = '93',
   VL_SAME_BLOCK_BORROW_REPAY = '94',
   LPC_FLASHLOAN_PREMIUMS_MISMATCH = '95',

specs/harness/LendingPoolHarnessForVariableDebtToken.sol

@@ -100,9 +100,9 @@ contract LendingPoolHarnessForVariableDebtToken is ILendingPool {
     view
     override
     returns (
-      uint256 totalCollateralETH,
+      uint256 totalCollateralBase,
-      uint256 totalDebtETH,
+      uint256 totalDebtBase,
-      uint256 availableBorrowsETH,
+      uint256 availableBorrowsBase,
       uint256 currentLiquidationThreshold,
       uint256 ltv,
       uint256 healthFactor

tasks/dev/4_oracles.ts

@@ -18,6 +18,7 @@ import {
   getLendingPoolAddressesProvider,
   getPairsTokenAggregator,
 } from '../../helpers/contracts-getters';
+import { ethers } from 'ethers';
 
 task('dev:deploy-oracles', 'Deploy oracles for dev enviroment')
   .addFlag('verify', 'Verify contracts at Etherscan')
@@ -58,7 +59,13 @@ task('dev:deploy-oracles', 'Deploy oracles for dev enviroment')
     );
 
     await deployAaveOracle(
-      [tokens, aggregators, fallbackOracle.address, await getWethAddress(poolConfig)],
+      [
+        tokens,
+        aggregators,
+        fallbackOracle.address,
+        await getWethAddress(poolConfig),
+        ethers.constants.WeiPerEther.toString(),
+      ],
       verify
     );
     await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));

tasks/full/3_oracles.ts

@@ -18,6 +18,7 @@ import {
   getPairsTokenAggregator,
 } from '../../helpers/contracts-getters';
 import { AaveOracle, LendingRateOracle } from '../../types';
+import { ethers } from 'ethers';
 
 task('full:deploy-oracles', 'Deploy oracles for dev enviroment')
   .addFlag('verify', 'Verify contracts at Etherscan')
@@ -55,7 +56,13 @@ task('full:deploy-oracles', 'Deploy oracles for dev enviroment')
         aaveOracle = await await getAaveOracle(aaveOracleAddress);
       } else {
         aaveOracle = await deployAaveOracle(
-          [tokens, aggregators, fallbackOracleAddress, await getWethAddress(poolConfig)],
+          [
+            tokens,
+            aggregators,
+            fallbackOracleAddress,
+            await getWethAddress(poolConfig),
+            ethers.constants.WeiPerEther.toString(),
+          ],
           verify
         );
         await waitForTx(await aaveOracle.setAssetSources(tokens, aggregators));

test-suites/test-aave/__setup.spec.ts

@@ -30,7 +30,7 @@ import {
   authorizeWETHGateway,
 } from '../../helpers/contracts-deployments';
 import { eEthereumNetwork } from '../../helpers/types';
-import { Signer } from 'ethers';
+import { ethers, Signer } from 'ethers';
 import { TokenContractId, eContractid, tEthereumAddress, AavePools } from '../../helpers/types';
 import { MintableERC20 } from '../../types/MintableERC20';
 import {
@@ -215,7 +215,13 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const [tokens, aggregators] = getPairsTokenAggregator(allTokenAddresses, allAggregatorsAddresses);
 
-  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address]);
+  await deployAaveOracle([
+    tokens,
+    aggregators,
+    fallbackOracle.address,
+    mockTokens.WETH.address,
+    ethers.constants.WeiPerEther.toString(),
+  ]);
   await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));
 
   const lendingRateOracle = await deployLendingRateOracle();
@@ -243,12 +249,8 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const config = loadPoolConfig(ConfigNames.Aave);
 
-  const {
+  const { ATokenNamePrefix, StableDebtTokenNamePrefix, VariableDebtTokenNamePrefix, SymbolPrefix } =
-    ATokenNamePrefix,
+    config;
-    StableDebtTokenNamePrefix,
-    VariableDebtTokenNamePrefix,
-    SymbolPrefix,
-  } = config;
   const treasuryAddress = await getTreasuryAddress(config);
 
   await initReservesByHelper(

test-suites/test-aave/delegation-permit.spec.ts

@@ -0,0 +1,170 @@
+import { MAX_UINT_AMOUNT, ZERO_ADDRESS } from '../../helpers/constants';
+import { BUIDLEREVM_CHAINID } from '../../helpers/buidler-constants';
+import {
+  buildPermitDelegationParams,
+  buildPermitParams,
+  convertToCurrencyDecimals,
+  getSignatureFromTypedData,
+} from '../../helpers/contracts-helpers';
+import { expect } from 'chai';
+import { BigNumber, ethers } from 'ethers';
+import { makeSuite, TestEnv } from './helpers/make-suite';
+import { DRE } from '../../helpers/misc-utils';
+import { waitForTx } from '../../helpers/misc-utils';
+import { _TypedDataEncoder } from 'ethers/lib/utils';
+
+const { parseEther } = ethers.utils;
+
+makeSuite('Permit Delegation', (testEnv: TestEnv) => {
+  const mintedAmount = '1000';
+  let daiMintedAmount: BigNumber;
+  let wethMintedAmount: BigNumber;
+
+  it('Checks the domain separator', async () => {
+    const { variableDebtDai, stableDebtDai, weth, dai } = testEnv;
+    const variableSeparator = await variableDebtDai.DOMAIN_SEPARATOR();
+    const stableSeparator = await stableDebtDai.DOMAIN_SEPARATOR();
+
+    const variableDomain = {
+      name: await variableDebtDai.name(),
+      version: '1',
+      chainId: DRE.network.config.chainId,
+      verifyingContract: variableDebtDai.address,
+    };
+    const stableDomain = {
+      name: await stableDebtDai.name(),
+      version: '1',
+      chainId: DRE.network.config.chainId,
+      verifyingContract: stableDebtDai.address,
+    };
+    const variableDomainSeparator = _TypedDataEncoder.hashDomain(variableDomain);
+    const stableDomainSeparator = _TypedDataEncoder.hashDomain(stableDomain);
+
+    expect(variableSeparator).to.be.equal(
+      variableDomainSeparator,
+      'Invalid variable domain separator'
+    );
+    expect(stableSeparator).to.be.equal(stableDomainSeparator, 'Invalid stable domain separator');
+  });
+
+  it('Setup the lending pool', async () => {
+    const {
+      pool,
+      weth,
+      dai,
+      deployer: user1,
+      users: [user2, user3],
+    } = testEnv;
+    daiMintedAmount = await convertToCurrencyDecimals(dai.address, mintedAmount);
+    wethMintedAmount = await convertToCurrencyDecimals(weth.address, mintedAmount);
+    await dai.mint(daiMintedAmount);
+    await dai.approve(pool.address, daiMintedAmount);
+    await pool.deposit(dai.address, daiMintedAmount, user1.address, 0);
+    await weth.connect(user2.signer).mint(wethMintedAmount);
+    await weth.connect(user2.signer).approve(pool.address, wethMintedAmount);
+    await pool.connect(user2.signer).deposit(weth.address, wethMintedAmount, user2.address, 0);
+  });
+  it('User 3 borrows variable interest dai on behalf of user 2 via permit', async () => {
+    const {
+      pool,
+      variableDebtDai,
+      stableDebtDai,
+      weth,
+      dai,
+      deployer: user1,
+      users: [user2, user3],
+    } = testEnv;
+
+    const chainId = DRE.network.config.chainId || BUIDLEREVM_CHAINID;
+    const expiration = MAX_UINT_AMOUNT;
+    const nonce = (await variableDebtDai._nonces(user2.address)).toNumber();
+    const permitAmount = daiMintedAmount.div(3);
+    const msgParams = buildPermitDelegationParams(
+      chainId,
+      variableDebtDai.address,
+      '1',
+      await variableDebtDai.name(),
+      user2.address,
+      user3.address,
+      nonce,
+      expiration,
+      permitAmount.toString()
+    );
+
+    const user2PrivateKey = require('../../test-wallets.js').accounts[1].secretKey;
+    if (!user2PrivateKey) {
+      throw new Error('INVALID_OWNER_PK');
+    }
+    expect(
+      (await variableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal('0');
+
+    const { v, r, s } = getSignatureFromTypedData(user2PrivateKey, msgParams);
+
+    await variableDebtDai
+      .connect(user1.signer)
+      .permitDelegation(user2.address, user3.address, permitAmount, expiration, v, r, s);
+
+    expect(
+      (await variableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal(permitAmount);
+
+    await pool.connect(user3.signer).borrow(dai.address, permitAmount, 2, 0, user2.address);
+    expect(
+      (await variableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal('0');
+  });
+  it('User 3 borrows stable interest dai on behalf of user 2 via permit', async () => {
+    const {
+      pool,
+      variableDebtDai,
+      stableDebtDai,
+      weth,
+      dai,
+      deployer: user1,
+      users: [user2, user3],
+    } = testEnv;
+
+    const chainId = DRE.network.config.chainId || BUIDLEREVM_CHAINID;
+    const expiration = MAX_UINT_AMOUNT;
+    const nonce = (await stableDebtDai._nonces(user2.address)).toNumber();
+    const permitAmount = daiMintedAmount.div(3);
+    const msgParams = buildPermitDelegationParams(
+      chainId,
+      stableDebtDai.address,
+      '1',
+      await stableDebtDai.name(),
+      user2.address,
+      user3.address,
+      nonce,
+      expiration,
+      permitAmount.toString()
+    );
+
+    const user2PrivateKey = require('../../test-wallets.js').accounts[1].secretKey;
+    if (!user2PrivateKey) {
+      throw new Error('INVALID_OWNER_PK');
+    }
+    expect(
+      (await stableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal('0');
+
+    const { v, r, s } = getSignatureFromTypedData(user2PrivateKey, msgParams);
+
+    await stableDebtDai
+      .connect(user1.signer)
+      .permitDelegation(user2.address, user3.address, permitAmount, expiration, v, r, s);
+
+    expect(
+      (await stableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal(permitAmount);
+
+    await pool
+      .connect(user3.signer)
+      .borrow(dai.address, daiMintedAmount.div(10), 1, 0, user2.address);
+
+    expect(
+      (await stableDebtDai.borrowAllowance(user2.address, user3.address)).toString()
+    ).to.be.equal(permitAmount.sub(daiMintedAmount.div(10)));
+  });
+});

test-suites/test-aave/helpers/make-suite.ts

@@ -14,6 +14,8 @@ import {
   getUniswapLiquiditySwapAdapter,
   getUniswapRepayAdapter,
   getFlashLiquidationAdapter,
+  getVariableDebtToken,
+  getStableDebtToken,
 } from '../../../helpers/contracts-getters';
 import { eEthereumNetwork, eNetwork, tEthereumAddress } from '../../../helpers/types';
 import { LendingPool } from '../../../types/LendingPool';
@@ -37,7 +39,7 @@ import { WETH9Mocked } from '../../../types/WETH9Mocked';
 import { WETHGateway } from '../../../types/WETHGateway';
 import { solidity } from 'ethereum-waffle';
 import { AaveConfig } from '../../../markets/aave';
-import { FlashLiquidationAdapter } from '../../../types';
+import { FlashLiquidationAdapter, StableDebtToken, VariableDebtToken } from '../../../types';
 import { HardhatRuntimeEnvironment } from 'hardhat/types';
 import { usingTenderly } from '../../../helpers/tenderly-utils';
 
@@ -63,6 +65,8 @@ export interface TestEnv {
   aWETH: AToken;
   dai: MintableERC20;
   aDai: AToken;
+  variableDebtDai: VariableDebtToken;
+  stableDebtDai: StableDebtToken;
   aUsdc: AToken;
   usdc: MintableERC20;
   aave: MintableERC20;
@@ -93,6 +97,8 @@ const testEnv: TestEnv = {
   aWETH: {} as AToken,
   dai: {} as MintableERC20,
   aDai: {} as AToken,
+  variableDebtDai: {} as VariableDebtToken,
+  stableDebtDai: {} as StableDebtToken,
   aUsdc: {} as AToken,
   usdc: {} as MintableERC20,
   aave: {} as MintableERC20,
@@ -147,6 +153,10 @@ export async function initializeMakeSuite() {
   const reservesTokens = await testEnv.helpersContract.getAllReservesTokens();
 
   const daiAddress = reservesTokens.find((token) => token.symbol === 'DAI')?.tokenAddress;
+  const {
+    variableDebtTokenAddress: variableDebtDaiAddress,
+    stableDebtTokenAddress: stableDebtDaiAddress,
+  } = await testEnv.helpersContract.getReserveTokensAddresses(daiAddress || '');
   const usdcAddress = reservesTokens.find((token) => token.symbol === 'USDC')?.tokenAddress;
   const aaveAddress = reservesTokens.find((token) => token.symbol === 'AAVE')?.tokenAddress;
   const wethAddress = reservesTokens.find((token) => token.symbol === 'WETH')?.tokenAddress;
@@ -159,6 +169,8 @@ export async function initializeMakeSuite() {
   }
 
   testEnv.aDai = await getAToken(aDaiAddress);
+  testEnv.variableDebtDai = await getVariableDebtToken(variableDebtDaiAddress);
+  testEnv.stableDebtDai = await getStableDebtToken(stableDebtDaiAddress);
   testEnv.aUsdc = await getAToken(aUsdcAddress);
   testEnv.aWETH = await getAToken(aWEthAddress);
 

test-suites/test-aave/liquidation-atoken.spec.ts

@@ -55,7 +55,7 @@ makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) =>
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.95)
         .toFixed(0)
@@ -269,7 +269,7 @@ makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) =>
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-aave/liquidation-underlying.spec.ts

@@ -83,7 +83,7 @@ makeSuite('LendingPool liquidation - liquidator receiving the underlying asset',
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.95)
         .toFixed(0)
@@ -267,7 +267,7 @@ makeSuite('LendingPool liquidation - liquidator receiving the underlying asset',
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-aave/pausable-functions.spec.ts

@@ -224,7 +224,7 @@ makeSuite('Pausable Pool', (testEnv: TestEnv) => {
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-aave/reserve-pause.spec.ts

@@ -224,7 +224,7 @@ makeSuite('Pause One Reserve', (testEnv: TestEnv) => {
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-aave/uniswapAdapters.flashLiquidation.spec.ts

@@ -61,7 +61,7 @@ makeSuite('Uniswap adapters', (testEnv: TestEnv) => {
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalDataBefore.availableBorrowsETH.toString())
+      new BigNumber(userGlobalDataBefore.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.95)
         .toFixed(0)
@@ -128,7 +128,7 @@ makeSuite('Uniswap adapters', (testEnv: TestEnv) => {
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalDataBefore.availableBorrowsETH.toString())
+      new BigNumber(userGlobalDataBefore.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.8)
         .toFixed(0)
@@ -141,7 +141,7 @@ makeSuite('Uniswap adapters', (testEnv: TestEnv) => {
 
     const userGlobalDataBefore2 = await pool.getUserAccountData(borrower.address);
 
-    const amountWETHToBorrow = new BigNumber(userGlobalDataBefore2.availableBorrowsETH.toString())
+    const amountWETHToBorrow = new BigNumber(userGlobalDataBefore2.availableBorrowsBase.toString())
       .multipliedBy(0.8)
       .toFixed(0);
 

test-suites/test-amm/__setup.spec.ts

@@ -29,7 +29,7 @@ import {
   deployFlashLiquidationAdapter,
   authorizeWETHGateway,
 } from '../../helpers/contracts-deployments';
-import { Signer } from 'ethers';
+import { ethers, Signer } from 'ethers';
 import { TokenContractId, eContractid, tEthereumAddress, AavePools } from '../../helpers/types';
 import { MintableERC20 } from '../../types/MintableERC20';
 import {
@@ -212,7 +212,7 @@ const buildTestEnv = async (deployer: Signer, secondaryWallet: Signer) => {
 
   const [tokens, aggregators] = getPairsTokenAggregator(allTokenAddresses, allAggregatorsAddresses);
 
-  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address]);
+  await deployAaveOracle([tokens, aggregators, fallbackOracle.address, mockTokens.WETH.address, ethers.constants.WeiPerEther.toString()]);
   await waitForTx(await addressesProvider.setPriceOracle(fallbackOracle.address));
 
   const lendingRateOracle = await deployLendingRateOracle();

test-suites/test-amm/liquidation-atoken.spec.ts

@@ -55,7 +55,7 @@ makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) =>
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.95)
         .toFixed(0)
@@ -269,7 +269,7 @@ makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) =>
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-amm/liquidation-underlying.spec.ts

@@ -83,7 +83,7 @@ makeSuite('LendingPool liquidation - liquidator receiving the underlying asset',
 
     const amountDAIToBorrow = await convertToCurrencyDecimals(
       dai.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(daiPrice.toString())
         .multipliedBy(0.95)
         .toFixed(0)
@@ -267,7 +267,7 @@ makeSuite('LendingPool liquidation - liquidator receiving the underlying asset',
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)

test-suites/test-amm/pausable-functions.spec.ts

@@ -224,7 +224,7 @@ makeSuite('Pausable Pool', (testEnv: TestEnv) => {
 
     const amountUSDCToBorrow = await convertToCurrencyDecimals(
       usdc.address,
-      new BigNumber(userGlobalData.availableBorrowsETH.toString())
+      new BigNumber(userGlobalData.availableBorrowsBase.toString())
         .div(usdcPrice.toString())
         .multipliedBy(0.9502)
         .toFixed(0)