Add Initialized event at aToken and Debt Token Base to match interfaces in newer versions of Aave Protocol.

Author: kartojal

contracts/interfaces/IAToken.sol

@@ -14,6 +14,28 @@ interface IAToken is IERC20, IScaledBalanceToken {
    **/
   event Mint(address indexed from, uint256 value, uint256 index);
 
+  /**
+   * @dev Emitted when an aToken is initialized
+   * @param underlyingAsset The address of the underlying asset
+   * @param pool The address of the associated lending pool
+   * @param treasury The address of the treasury
+   * @param incentivesController The address of the incentives controller for this aToken
+   * @param aTokenDecimals the decimals of the underlying
+   * @param aTokenName the name of the aToken
+   * @param aTokenSymbol the symbol of the aToken
+   * @param params A set of encoded parameters for additional initialization
+   **/
+  event Initialized(
+    address indexed underlyingAsset,
+    address indexed pool,
+    address treasury,
+    address incentivesController,
+    uint8 aTokenDecimals,
+    string aTokenName,
+    string aTokenSymbol,
+    bytes params
+  );
+
   /**
    * @dev Mints `amount` aTokens to `user`
    * @param user The address receiving the minted tokens

contracts/interfaces/IDebtTokenBase.sol

@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: agpl-3.0
+pragma solidity 0.6.12;
+
+interface IDebtTokenBase {
+  /**
+   * @dev Emitted when a debt token is initialized
+   * @param underlyingAsset The address of the underlying asset
+   * @param pool The address of the associated lending pool
+   * @param incentivesController The address of the incentives controller for this aToken
+   * @param debtTokenDecimals the decimals of the debt token
+   * @param debtTokenName the name of the debt token
+   * @param debtTokenSymbol the symbol of the debt token
+   * @param params A set of encoded parameters for additional initialization
+   **/
+  event Initialized(
+    address indexed underlyingAsset,
+    address indexed pool,
+    address incentivesController,
+    uint8 debtTokenDecimals,
+    string debtTokenName,
+    string debtTokenSymbol,
+    bytes params
+  );
+}

contracts/protocol/tokenization/AToken.sol

@@ -84,6 +84,17 @@ contract AToken is VersionedInitializable, IncentivizedERC20, IAToken {
     _setName(tokenName);
     _setSymbol(tokenSymbol);
     _setDecimals(underlyingAssetDecimals);
+
+    emit Initialized(
+      UNDERLYING_ASSET_ADDRESS,
+      address(POOL),
+      RESERVE_TREASURY_ADDRESS,
+      address(_incentivesController),
+      underlyingAssetDecimals,
+      tokenName,
+      tokenSymbol,
+      ''
+    );
   }
 
   /**

contracts/protocol/tokenization/base/DebtTokenBase.sol

@@ -3,6 +3,7 @@ pragma solidity 0.6.12;
 
 import {ILendingPool} from '../../../interfaces/ILendingPool.sol';
 import {ICreditDelegationToken} from '../../../interfaces/ICreditDelegationToken.sol';
+import {IDebtTokenBase} from '../../../interfaces/IDebtTokenBase.sol';
 import {
   VersionedInitializable
 } from '../../libraries/aave-upgradeability/VersionedInitializable.sol';
@@ -18,7 +19,8 @@ import {Errors} from '../../libraries/helpers/Errors.sol';
 abstract contract DebtTokenBase is
   IncentivizedERC20,
   VersionedInitializable,
-  ICreditDelegationToken
+  ICreditDelegationToken,
+  IDebtTokenBase
 {
   address public immutable UNDERLYING_ASSET_ADDRESS;
   ILendingPool public immutable POOL;
@@ -62,6 +64,16 @@ abstract contract DebtTokenBase is
     _setName(name);
     _setSymbol(symbol);
     _setDecimals(decimals);
+
+    emit Initialized(
+      UNDERLYING_ASSET_ADDRESS,
+      address(POOL),
+      address(_incentivesController),
+      decimals,
+      name,
+      symbol,
+      ''
+    );
   }
 
   /**