mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
126 lines
3.8 KiB
Solidity
126 lines
3.8 KiB
Solidity
pragma solidity ^0.4.11;
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import "./ownership/Multisig.sol";
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import "./ownership/Shareable.sol";
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import "./DayLimit.sol";
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/**
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* MultisigWallet
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* Usage:
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* bytes32 h = Wallet(w).from(oneOwner).execute(to, value, data);
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* Wallet(w).from(anotherOwner).confirm(h);
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*/
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contract MultisigWallet is Multisig, Shareable, DayLimit {
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struct Transaction {
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address to;
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uint256 value;
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bytes data;
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}
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/**
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* Constructor, sets the owners addresses, number of approvals required, and daily spending limit
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* @param _owners A list of owners.
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* @param _required The amount required for a transaction to be approved.
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*/
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constructor(address[] memory _owners, uint256 _required, uint256 _daylimit)
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Shareable(_owners, _required)
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DayLimit(_daylimit) public { }
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/**
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* @dev destroys the contract sending everything to `_to`.
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*/
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function destroy(address _to) onlymanyowners(keccak256(msg.data)) external {
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selfdestruct(_to);
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}
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/**
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* @dev Fallback function, receives value and emits a deposit event.
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*/
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function() external payable {
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// just being sent some cash?
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if (msg.value > 0)
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emit Deposit(msg.sender, msg.value);
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}
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/**
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* @dev Outside-visible transaction entry point. Executes transaction immediately if below daily
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* spending limit. If not, goes into multisig process. We provide a hash on return to allow the
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* sender to provide shortcuts for the other confirmations (allowing them to avoid replicating
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* the _to, _value, and _data arguments). They still get the option of using them if they want,
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* anyways.
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* @param _to The receiver address
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* @param _value The value to send
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* @param _data The data part of the transaction
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*/
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function execute(address _to, uint256 _value, bytes calldata _data) external onlyOwner returns (bytes32 _r) {
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// first, take the opportunity to check that we're under the daily limit.
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if (underLimit(_value)) {
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emit SingleTransact(msg.sender, _value, _to, _data);
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// yes - just execute the call.
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(bool success,) = _to.call.value(_value)(_data);
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require(success);
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return 0;
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}
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// determine our operation hash.
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_r = keccak256(abi.encodePacked(msg.data, block.number));
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if (!confirm(_r) && txs[_r].to == address(0)) {
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txs[_r].to = _to;
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txs[_r].value = _value;
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txs[_r].data = _data;
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emit ConfirmationNeeded(_r, msg.sender, _value, _to, _data);
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}
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}
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/**
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* @dev Confirm a transaction by providing just the hash. We use the previous transactions map,
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* txs, in order to determine the body of the transaction from the hash provided.
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* @param _h The transaction hash to approve.
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*/
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function confirm(bytes32 _h) onlymanyowners(_h) public returns (bool) {
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if (txs[_h].to != address(0)) {
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(bool success,) = txs[_h].to.call.value(txs[_h].value)(txs[_h].data);
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require(success);
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emit MultiTransact(msg.sender, _h, txs[_h].value, txs[_h].to, txs[_h].data);
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delete txs[_h];
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return true;
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}
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}
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/**
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* @dev Updates the daily limit value.
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* @param _newLimit uint256 to represent the new limit.
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*/
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function setDailyLimit(uint256 _newLimit) onlymanyowners(keccak256(msg.data)) external {
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_setDailyLimit(_newLimit);
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}
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/**
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* @dev Resets the value spent to enable more spending
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*/
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function resetSpentToday() onlymanyowners(keccak256(msg.data)) external {
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_resetSpentToday();
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}
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// INTERNAL METHODS
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/**
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* @dev Clears the list of transactions pending approval.
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*/
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function clearPending() internal {
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uint256 length = pendingsIndex.length;
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for (uint256 i = 0; i < length; ++i) {
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delete txs[pendingsIndex[i]];
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}
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super.clearPending();
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}
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// FIELDS
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// pending transactions we have at present.
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mapping (bytes32 => Transaction) txs;
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}
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