AaveV3Base_IncreaseStablecoinOptimalBorrowRates_20231113.sol

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

import {AaveV3BaseAssets} from 'aave-address-book/AaveV3Base.sol';
import {AaveV3PayloadBase} from 'aave-helpers/v3-config-engine/AaveV3PayloadBase.sol';
import {EngineFlags} from 'aave-helpers/v3-config-engine/EngineFlags.sol';
import {IAaveV3ConfigEngine} from 'aave-helpers/v3-config-engine/IAaveV3ConfigEngine.sol';
import {IV3RateStrategyFactory} from 'aave-helpers/v3-config-engine/IV3RateStrategyFactory.sol';

/**
 * @title Increase Stablecoin Optimal Borrow Rates
 * @author Alice Rozengarden (@Rozengarden - Aave-chan initiative)
 * - Snapshot: https://snapshot.org/#/aave.eth/proposal/0x914862039828294f4277ad63087ffae295b7693ba365c9036326cca802bfc7af, 0xb9b28f57f7633dd6b987de9abcede23da62fe4fab6b002f189b8b25a7c02ea93
 * - Discussion: https://governance.aave.com/t/arfc-increase-optimal-borrow-rates-for-ethereum-stablecoin-markets/15096/3
 */
contract AaveV3Base_IncreaseStablecoinOptimalBorrowRates_20231113 is AaveV3PayloadBase {
  function rateStrategiesUpdates()
    public
    pure
    override
    returns (IAaveV3ConfigEngine.RateStrategyUpdate[] memory)
  {
    IAaveV3ConfigEngine.RateStrategyUpdate[]
      memory rateStrategies = new IAaveV3ConfigEngine.RateStrategyUpdate[](1);
    rateStrategies[0] = IAaveV3ConfigEngine.RateStrategyUpdate({
      asset: AaveV3BaseAssets.USDbC_UNDERLYING,
      params: IV3RateStrategyFactory.RateStrategyParams({
        optimalUsageRatio: _bpsToRay(90_00),
        baseVariableBorrowRate: EngineFlags.KEEP_CURRENT,
        variableRateSlope1: _bpsToRay(5_00),
        variableRateSlope2: EngineFlags.KEEP_CURRENT,
        stableRateSlope1: EngineFlags.KEEP_CURRENT,
        stableRateSlope2: EngineFlags.KEEP_CURRENT,
        baseStableRateOffset: EngineFlags.KEEP_CURRENT,
        stableRateExcessOffset: EngineFlags.KEEP_CURRENT,
        optimalStableToTotalDebtRatio: EngineFlags.KEEP_CURRENT
      })
    });

    return rateStrategies;
  }
}