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check to prevent wallet created with more _required than _owners #66

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check to prevent wallet created with more _required than _owners #66

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1 change: 1 addition & 0 deletions wallet/wallet.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@ contract multiowned {
// constructor is given number of sigs required to do protected "onlymanyowners" transactions
// as well as the selection of addresses capable of confirming them.
function multiowned(address[] _owners, uint _required) {
if (_required > 1 && _owners.length < _required -1) throw;
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@sunny-g sunny-g Jun 21, 2016

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Is that -1 supposed to be there?

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@bencxr bencxr Jun 21, 2016

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@sunny-g I believe the -1 is because _owners does not include the msg.sender which automatically becomes an owner as well. so if _owners.length is 2 then _required can be 3 (2 owners provided + the msg.sender creating the contract).

The code should be updated to make this clearer, through comments or by doing a +1 to the owners instead.

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@sunny-g sunny-g Jun 30, 2016

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Wow that was dumb misread. My mistake!

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@chriseth chriseth Aug 19, 2016

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If we do such checks, we should probably also check for:
if (_required == 0) throw;
Also rewriting the current condition as if (_required > _owners.length + 1) would be more readable, I think.

m_numOwners = _owners.length + 1;
m_owners[1] = uint(msg.sender);
m_ownerIndex[uint(msg.sender)] = 1;
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