63 lines
1.8 KiB
Solidity
63 lines
1.8 KiB
Solidity
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pragma solidity ^0.4.17;
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import "./DelayedUpdatableInstanceStorage.sol";
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import "./DelegatedCall.sol";
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/**
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* @title DelayedUpdatableInstance
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* @author Ricardo Guilherme Schmidt (Status Research & Development GmbH)
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* @dev Contract that can be updated by a call from itself.
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*/
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contract DelayedUpdatableInstance is DelayedUpdatableInstanceStorage, DelegatedCall {
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event UpdateRequested(address newKernel, uint256 activation);
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event UpdateCancelled();
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event UpdateConfirmed(address oldKernel, address newKernel);
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function DelayedUpdatableInstance(address _kernel) public {
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kernel = _kernel;
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}
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/**
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* @dev delegatecall everything (but declared functions) to `_target()`
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* @notice Verify `kernel()` code to predict behavior
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*/
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function () external delegated {
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//all goes to kernel
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}
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/**
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* @dev returns kernel if kernel that is configured
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* @return kernel address
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*/
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function targetDelegatedCall()
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internal
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constant
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returns(address)
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{
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return kernel;
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}
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function updateRequestUpdatableInstance(address _kernel) external {
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require(msg.sender == address(this));
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uint activation = block.timestamp + 30 days;
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update = Update(_kernel, activation);
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UpdateRequested(_kernel, activation);
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}
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function updateConfirmUpdatableInstance(address _kernel) external {
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require(msg.sender == address(this));
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Update memory pending = update;
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require(pending.kernel == _kernel);
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require(pending.activation < block.timestamp);
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kernel = pending.kernel;
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delete update;
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UpdateConfirmed(kernel, pending.kernel);
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}
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function updateCancelUpdatableInstance() external {
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require(msg.sender == address(this));
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delete update;
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}
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}
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