133 lines
4.3 KiB
Solidity
133 lines
4.3 KiB
Solidity
/*
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Copyright 2017 ZeroEx Intl.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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pragma solidity ^0.4.10;
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import { MultiSigWallet } from "../MultiSigWallet/MultiSigWallet.sol";
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/// @title Multisignature wallet with time lock- Allows multiple parties to execute a transaction after a time lock has passed.
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/// @author Amir Bandeali - <amir@0xProject.com>
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contract MultiSigWalletWithTimeLock is MultiSigWallet {
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event ConfirmationTimeSet(uint indexed transactionId, uint confirmationTime);
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event TimeLockChange(uint secondsTimeLocked);
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uint public secondsTimeLocked;
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mapping (uint => uint) public confirmationTimes;
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modifier notFullyConfirmed(uint transactionId) {
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require(!isConfirmed(transactionId));
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_;
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}
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modifier fullyConfirmed(uint transactionId) {
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require(isConfirmed(transactionId));
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_;
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}
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modifier pastTimeLock(uint transactionId) {
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require(block.timestamp >= confirmationTimes[transactionId] + secondsTimeLocked);
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_;
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}
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/*
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* Public functions
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*/
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/// @dev Contract constructor sets initial owners, required number of confirmations, and time lock.
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/// @param _owners List of initial owners.
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/// @param _required Number of required confirmations.
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/// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
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function MultiSigWalletWithTimeLock(address[] _owners, uint _required, uint _secondsTimeLocked)
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public
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MultiSigWallet(_owners, _required)
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{
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secondsTimeLocked = _secondsTimeLocked;
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}
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/// @dev Changes the duration of the time lock for transactions.
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/// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
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function changeTimeLock(uint _secondsTimeLocked)
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public
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onlyWallet
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{
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secondsTimeLocked = _secondsTimeLocked;
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TimeLockChange(_secondsTimeLocked);
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}
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/// @dev Allows an owner to confirm a transaction.
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/// @param transactionId Transaction ID.
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function confirmTransaction(uint transactionId)
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public
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ownerExists(msg.sender)
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transactionExists(transactionId)
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notConfirmed(transactionId, msg.sender)
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notFullyConfirmed(transactionId)
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{
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confirmations[transactionId][msg.sender] = true;
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Confirmation(msg.sender, transactionId);
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if (isConfirmed(transactionId)) {
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setConfirmationTime(transactionId, block.timestamp);
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}
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}
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/// @dev Allows an owner to revoke a confirmation for a transaction.
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/// @param transactionId Transaction ID.
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function revokeConfirmation(uint transactionId)
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public
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ownerExists(msg.sender)
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confirmed(transactionId, msg.sender)
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notExecuted(transactionId)
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notFullyConfirmed(transactionId)
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{
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confirmations[transactionId][msg.sender] = false;
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Revocation(msg.sender, transactionId);
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}
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/// @dev Allows anyone to execute a confirmed transaction.
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/// @param transactionId Transaction ID.
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function executeTransaction(uint transactionId)
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public
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notExecuted(transactionId)
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fullyConfirmed(transactionId)
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pastTimeLock(transactionId)
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{
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Transaction storage tx = transactions[transactionId];
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tx.executed = true;
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if (tx.destination.call.value(tx.value)(tx.data))
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Execution(transactionId);
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else {
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ExecutionFailure(transactionId);
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tx.executed = false;
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}
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}
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/*
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* Internal functions
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*/
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/// @dev Sets the time of when a submission first passed.
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function setConfirmationTime(uint transactionId, uint confirmationTime)
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internal
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{
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confirmationTimes[transactionId] = confirmationTime;
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ConfirmationTimeSet(transactionId, confirmationTime);
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}
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}
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