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       1                 :             : // SPDX-License-Identifier: BUSL-1.1
       2                 :             : pragma solidity ^0.8.10;
       3                 :             : 
       4                 :             : import {IPullRewardsTransferStrategy} from '../interfaces/IPullRewardsTransferStrategy.sol';
       5                 :             : import {ITransferStrategyBase} from '../interfaces/ITransferStrategyBase.sol';
       6                 :             : import {TransferStrategyBase} from './TransferStrategyBase.sol';
       7                 :             : import {GPv2SafeERC20} from '../../dependencies/gnosis/contracts/GPv2SafeERC20.sol';
       8                 :             : import {IERC20} from '../../dependencies/openzeppelin/contracts/IERC20.sol';
       9                 :             : 
      10                 :             : /**
      11                 :             :  * @title PullRewardsTransferStrategy
      12                 :             :  * @notice Transfer strategy that pulls ERC20 rewards from an external account to the user address.
      13                 :             :  * The external account could be a smart contract or EOA that must approve to the PullRewardsTransferStrategy contract address.
      14                 :             :  * @author Aave
      15                 :             :  **/
      16                 :             : contract PullRewardsTransferStrategy is TransferStrategyBase, IPullRewardsTransferStrategy {
      17                 :             :   using GPv2SafeERC20 for IERC20;
      18                 :             : 
      19                 :             :   address internal immutable REWARDS_VAULT;
      20                 :             : 
      21                 :             :   constructor(
      22                 :             :     address incentivesController,
      23                 :             :     address rewardsAdmin,
      24                 :             :     address rewardsVault
      25                 :             :   ) TransferStrategyBase(incentivesController, rewardsAdmin) {
      26                 :         380 :     REWARDS_VAULT = rewardsVault;
      27                 :             :   }
      28                 :             : 
      29                 :             :   /// @inheritdoc TransferStrategyBase
      30                 :             :   function performTransfer(
      31                 :             :     address to,
      32                 :             :     address reward,
      33                 :             :     uint256 amount
      34                 :             :   )
      35                 :             :     external
      36                 :             :     override(TransferStrategyBase, ITransferStrategyBase)
      37                 :             :     onlyIncentivesController
      38                 :             :     returns (bool)
      39                 :             :   {
      40                 :        1902 :     IERC20(reward).safeTransferFrom(REWARDS_VAULT, to, amount);
      41                 :             : 
      42                 :        1902 :     return true;
      43                 :             :   }
      44                 :             : 
      45                 :             :   /// @inheritdoc IPullRewardsTransferStrategy
      46                 :             :   function getRewardsVault() external view returns (address) {
      47                 :           1 :     return REWARDS_VAULT;
      48                 :             :   }
      49                 :             : }