Merge branch 'feat/105-msgsender-executeOperation' into 'master'

Passed `initiator` param to flashLoan()'s executeOperation() receiver.

Closes #105

See merge request aave-tech/protocol-v2!114

contracts/flashloan/interfaces/IFlashLoanReceiver.sol

@@ -12,6 +12,7 @@ interface IFlashLoanReceiver {
     address[] calldata assets,
     uint256[] calldata amounts,
     uint256[] calldata premiums,
+    address initiator,
     bytes calldata params
   ) external returns (bool);
 }

contracts/interfaces/ISwapAdapter.sol

@@ -1,20 +0,0 @@
-// SPDX-License-Identifier: agpl-3.0
-pragma solidity ^0.6.8;
-
-interface ISwapAdapter {
-  /**
-   * @dev Swaps an `amountToSwap` of an asset to another, approving a `fundsDestination` to pull the funds
-   * @param assetToSwapFrom Origin asset
-   * @param assetToSwapTo Destination asset
-   * @param amountToSwap How much `assetToSwapFrom` needs to be swapped
-   * @param fundsDestination Address that will be pulling the swapped funds
-   * @param params Additional variadic field to include extra params
-   */
-  function executeOperation(
-    address assetToSwapFrom,
-    address assetToSwapTo,
-    uint256 amountToSwap,
-    address fundsDestination,
-    bytes calldata params
-  ) external;
-}

contracts/lendingpool/LendingPool.sol

@@ -20,7 +20,6 @@ import {IStableDebtToken} from '../tokenization/interfaces/IStableDebtToken.sol'
 import {IVariableDebtToken} from '../tokenization/interfaces/IVariableDebtToken.sol';
 import {DebtTokenBase} from '../tokenization/base/DebtTokenBase.sol';
 import {IFlashLoanReceiver} from '../flashloan/interfaces/IFlashLoanReceiver.sol';
-import {ISwapAdapter} from '../interfaces/ISwapAdapter.sol';
 import {LendingPoolCollateralManager} from './LendingPoolCollateralManager.sol';
 import {IPriceOracleGetter} from '../interfaces/IPriceOracleGetter.sol';
 import {SafeERC20} from '../dependencies/openzeppelin/contracts/SafeERC20.sol';
@@ -544,7 +543,7 @@ contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage
 
     //execute action of the receiver
     require(
-      vars.receiver.executeOperation(assets, amounts, premiums, params),
+      vars.receiver.executeOperation(assets, amounts, premiums, msg.sender, params),
       Errors.INVALID_FLASH_LOAN_EXECUTOR_RETURN
     );
 

contracts/lendingpool/LendingPoolCollateralManager.sol

@@ -15,7 +15,6 @@ import {Helpers} from '../libraries/helpers/Helpers.sol';
 import {WadRayMath} from '../libraries/math/WadRayMath.sol';
 import {PercentageMath} from '../libraries/math/PercentageMath.sol';
 import {SafeERC20} from '../dependencies/openzeppelin/contracts/SafeERC20.sol';
-import {ISwapAdapter} from '../interfaces/ISwapAdapter.sol';
 import {Errors} from '../libraries/helpers/Errors.sol';
 import {ValidationLogic} from '../libraries/logic/ValidationLogic.sol';
 import {LendingPoolStorage} from './LendingPoolStorage.sol';

contracts/mocks/flashloan/MockFlashLoanReceiver.sol

@@ -47,9 +47,11 @@ contract MockFlashLoanReceiver is FlashLoanReceiverBase {
     address[] memory assets,
     uint256[] memory amounts,
     uint256[] memory premiums,
+    address initiator,
     bytes memory params
   ) public override returns (bool) {
     params;
+    initiator;
 
     if (_failExecution) {
       emit ExecutedWithFail(assets, amounts, premiums);