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DaoClient.sol
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DaoClient.sol
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pragma solidity ^0.4.23;
import "./IDaoBase.sol";
import "./IDaoObserver.sol";
/**
* @title DaoClient, just an easy-to-use wrapper.
* @dev This contract provides you with internal 'daoBase' variable.
* Once your DAO controller is upgraded -> all DaoClients will be notified and 'daoBase' var will be updated automatically.
*
* Some contracts like Votings or Auto-callers has 'daoBase' variable and don't use DaoClient.
* In this case they will stop working if the controller (DAO) is upgraded (it is as inteded).
*/
contract DaoClient is IDaoObserver {
IDaoBase daoBase;
modifier isCanDo(bytes32 _what) {
require(daoBase.isCanDoAction(msg.sender, _what));
_;
}
constructor(IDaoBase _daoBase) public {
daoBase = _daoBase;
daoBase.addObserver(IDaoObserver(this));
}
/**
* @dev If your company is upgraded -> then this will automatically update the current daoBase.
* daoBase will point at NEW contract!
* @param _newAddress New controller.
*/
function onUpgrade(address _newAddress) public {
require(msg.sender == address(daoBase));
daoBase = IDaoBase(_newAddress);
// this is not needed because we are already in the list of observers (in the store)
// and the controller is upgraded only
//daoBase.addObserver(this);
}
}