60 lines
1.4 KiB
Solidity
60 lines
1.4 KiB
Solidity
/*
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Copyright 2020 DODO ZOO.
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SPDX-License-Identifier: Apache-2.0
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*/
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pragma solidity 0.6.9;
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pragma experimental ABIEncoderV2;
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/**
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* @title Ownable
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* @author DODO Breeder
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*
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* @notice Ownership related functions
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*/
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contract InitializableOwnable {
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address public _OWNER_;
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address public _NEW_OWNER_;
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bool internal _INITIALIZED_;
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// ============ Events ============
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event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner);
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event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
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// ============ Modifiers ============
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modifier notInitialized() {
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require(!_INITIALIZED_, "DODO_INITIALIZED");
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_;
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}
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modifier onlyOwner() {
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require(msg.sender == _OWNER_, "NOT_OWNER");
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_;
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}
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// ============ Functions ============
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function initOwner(address newOwner) public notInitialized{
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_INITIALIZED_ = true;
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_OWNER_ = newOwner;
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}
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function transferOwnership(address newOwner) public onlyOwner {
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require(newOwner != address(0), "INVALID_OWNER");
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emit OwnershipTransferPrepared(_OWNER_, newOwner);
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_NEW_OWNER_ = newOwner;
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}
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function claimOwnership() public {
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require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM");
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emit OwnershipTransferred(_OWNER_, _NEW_OWNER_);
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_OWNER_ = _NEW_OWNER_;
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_NEW_OWNER_ = address(0);
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}
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}
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