pragma solidity >=0.6.12;

// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
// SPDX-License-Identifier:	GPL-3.0-or-later
// File-version: 2


interface TransferAuthorization {
	event NewRequest(address indexed _sender, address indexed _recipient, address indexed _token, uint256 _value, uint256 _serial);
	event NewExecution(uint256 serial);
	event NewRejection(uint256 serial);
	event TransferFail(uint256 serial);

	struct Transaction {
		uint256 serial;
		address sender;
		address recipient;
		address token;
		uint256 value;
	}

	function approvers() external view returns (address[] memory);
	function count() external view returns (uint256);
	function lastSerial() external view returns (uint256);
	function nextSerial() external view returns (uint256);
	function getSerialAt(uint256 _idx) external view returns (uint256);
	function requests(uint256 _serial) external view returns (Transaction memory);
	function createRequest(address _recipient, address _token, uint256 _value) external returns (uint256);
	function executeRequest(uint256 _serial) external returns (bool);
	function rejectRequest(uint256 _serial) external returns (bool);
}