// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0;

/// @title Pre-IDO state that can change
/// @notice These methods compose the Pre-IDO's state, and can change with any frequency including multiple times
/// per transaction
interface IPreIDOState {
  /// @notice Look up information about a specific order in the pre-IDO contract
  /// @param id The order ID to look up
  /// @return beneficiary The investor address whose `amount` of tokens in this order belong to,
  /// amount The amount of tokens has been locked in this order,
  /// releaseOnBlock The block timestamp when tokens can be redeem or claimed from the time-locked contract,
  /// claimed The status of this order whether it's claimed or not.
  function orders(uint256 id) external view returns(
    address payable beneficiary,
    uint256 amount,
    uint256 releaseOnBlock,
    bool claimed
  );

  /// @notice Look up all order IDs that a specific `investor` address has been order in the pre-IDO contract
  /// @param investor The investor address to look up
  /// @return ids All order IDs that the `investor` has been order
  function investorOrderIds(address investor) external view returns(uint256[] memory ids);

  /// @notice Look up locked-balance of a specific `investor` address in the pre-IDO contract
  /// @param investor The investor address to look up
  /// @return balance The locked-balance of the `investor`
  function balanceOf(address investor) external view returns(uint256 balance);
}