// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;

interface IBalanceHook {
  function handleBalanceUpdate(
    address token,
    address holder,
    uint256 oldBalance,
    uint256 newBalance,
    uint256 providerSupply
  ) external;

  function handleScaledBalanceUpdate(
    address token,
    address holder,
    uint256 oldBalance,
    uint256 newBalance,
    uint256 providerSupply,
    uint256 scaleRay
  ) external;

  function isScaledBalanceUpdateNeeded() external view returns (bool);
}