AaveV2Ethereum_UpgradeAMPLImplementation_20240402.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {IAaveV2ConfigEngine} from 'aave-helpers/v2-config-engine/IAaveV2ConfigEngine.sol';
import {IV2RateStrategyFactory} from 'aave-helpers/v2-config-engine/IV2RateStrategyFactory.sol';
import {EngineFlags} from 'aave-helpers/v3-config-engine/EngineFlags.sol';
import {AaveV2EthereumAssets} from 'aave-address-book/AaveV2Ethereum.sol';
import {AaveV2Ethereum, AaveV2PayloadEthereum} from 'aave-helpers/v2-config-engine/AaveV2PayloadEthereum.sol';

/**
 * @title Upgrade AMPL implementation
 * @author BGD Labs
 * - Snapshot: https://snapshot.org/#/aave.eth/proposal/0xb7226dd6441b67225924082215f7a512bfd98252897ee43a879084e07ab53607
 * - Discussion: https://governance.aave.com/t/arfc-aampl-interim-distribution/17184
 */
contract AaveV2Ethereum_UpgradeAMPLImplementation_20240402 is AaveV2PayloadEthereum {
  address constant A_TOKEN_IMPL = 0x1F32642b216d19DAEb1531862647195a626F4193;

  function _preExecute() internal override {
    AaveV2Ethereum.POOL_CONFIGURATOR.updateAToken(
      AaveV2EthereumAssets.AMPL_UNDERLYING,
      A_TOKEN_IMPL
    );
  }

  function rateStrategiesUpdates()
    public
    pure
    override
    returns (IAaveV2ConfigEngine.RateStrategyUpdate[] memory)
  {
    IAaveV2ConfigEngine.RateStrategyUpdate[]
      memory rateStrategies = new IAaveV2ConfigEngine.RateStrategyUpdate[](1);
    rateStrategies[0] = IAaveV2ConfigEngine.RateStrategyUpdate({
      asset: AaveV2EthereumAssets.AMPL_UNDERLYING,
      params: IV2RateStrategyFactory.RateStrategyParams({
        optimalUtilizationRate: EngineFlags.KEEP_CURRENT,
        baseVariableBorrowRate: EngineFlags.KEEP_CURRENT,
        variableRateSlope1: EngineFlags.KEEP_CURRENT,
        variableRateSlope2: _bpsToRay(300_00),
        stableRateSlope1: EngineFlags.KEEP_CURRENT,
        stableRateSlope2: EngineFlags.KEEP_CURRENT
      })
    });

    return rateStrategies;
  }
}