pragma solidity ^0.5.17;

/**
 * @title Interface for contract governance/Staking/Staking.sol
 * @dev Interfaces are used to cast a contract address into a callable instance.
 */
interface IStaking {
	function stakesBySchedule(
		uint256 amount,
		uint256 cliff,
		uint256 duration,
		uint256 intervalLength,
		address stakeFor,
		address delegatee
	) external;

	function stake(
		uint96 amount,
		uint256 until,
		address stakeFor,
		address delegatee
	) external;

	function getPriorVotes(
		address account,
		uint256 blockNumber,
		uint256 date
	) external view returns (uint96);

	function getPriorTotalVotingPower(uint32 blockNumber, uint256 time) external view returns (uint96);

	function getPriorWeightedStake(
		address account,
		uint256 blockNumber,
		uint256 date
	) external view returns (uint96);

	function timestampToLockDate(uint256 timestamp) external view returns (uint256 lockDate);
}