2017-07-05 10:28:15 +00:00
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pragma solidity ^0.4.4;
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import "MultiSigWallet.sol";
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/// @title Multisignature wallet with daily limit - Allows an owner to withdraw a daily limit without multisig.
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/// @author Stefan George - <stefan.george@consensys.net>
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contract MultiSigWalletWithDailyLimit is MultiSigWallet {
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event DailyLimitChange(uint dailyLimit);
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uint public dailyLimit;
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uint public lastDay;
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uint public spentToday;
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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 daily withdraw limit.
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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/// @param _dailyLimit Amount in wei, which can be withdrawn without confirmations on a daily basis.
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2018-07-14 21:42:01 +00:00
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constructor(address[] memory _owners, uint _required, uint _dailyLimit)
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2017-07-05 10:28:15 +00:00
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public
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MultiSigWallet(_owners, _required)
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{
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dailyLimit = _dailyLimit;
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}
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/// @dev Allows to change the daily limit. Transaction has to be sent by wallet.
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/// @param _dailyLimit Amount in wei.
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function changeDailyLimit(uint _dailyLimit)
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public
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onlyWallet
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{
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dailyLimit = _dailyLimit;
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2018-06-27 08:35:38 +00:00
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emit DailyLimitChange(_dailyLimit);
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2017-07-05 10:28:15 +00:00
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}
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/// @dev Allows anyone to execute a confirmed transaction or ether withdraws until daily limit is reached.
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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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{
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2018-07-11 11:30:46 +00:00
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Transaction storage tx = transactions[transactionId];
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2017-07-05 10:28:15 +00:00
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bool confirmed = isConfirmed(transactionId);
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if (confirmed || tx.data.length == 0 && isUnderLimit(tx.value)) {
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tx.executed = true;
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if (!confirmed)
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spentToday += tx.value;
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if (tx.destination.call.value(tx.value)(tx.data))
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2018-06-27 08:35:38 +00:00
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emit Execution(transactionId);
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2017-07-05 10:28:15 +00:00
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else {
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2018-06-27 08:35:38 +00:00
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emit ExecutionFailure(transactionId);
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2017-07-05 10:28:15 +00:00
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tx.executed = false;
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if (!confirmed)
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spentToday -= tx.value;
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}
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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 Returns if amount is within daily limit and resets spentToday after one day.
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/// @param amount Amount to withdraw.
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/// @return Returns if amount is under daily limit.
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function isUnderLimit(uint amount)
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internal
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returns (bool)
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{
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if (now > lastDay + 24 hours) {
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lastDay = now;
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spentToday = 0;
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}
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if (spentToday + amount > dailyLimit || spentToday + amount < spentToday)
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return false;
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return true;
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}
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/*
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* Web3 call functions
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*/
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/// @dev Returns maximum withdraw amount.
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/// @return Returns amount.
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function calcMaxWithdraw()
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public
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2018-07-02 09:14:28 +00:00
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view
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2017-07-05 10:28:15 +00:00
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returns (uint)
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{
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if (now > lastDay + 24 hours)
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return dailyLimit;
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if (dailyLimit < spentToday)
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return 0;
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return dailyLimit - spentToday;
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}
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}
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