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Merge pull request #1763 from nemofisch/develop

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Fix delegation loop in Ballot example contract
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chriseth 2017-03-09 12:39:25 +01:00 committed by GitHub
commit b22369d590
1 changed files with 8 additions and 8 deletions
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docs/solidity-by-example.rst
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@ -106,6 +106,10 @@ of votes.
if (sender.voted)
throw;
// Self-delegation is not allowed.
if (to == msg.sender)
throw;
// Forward the delegation as long as
// `to` also delegated.
// In general, such loops are very dangerous,
@ -114,16 +118,12 @@ of votes.
// In this case, the delegation will not be executed,
// but in other situations, such loops might
// cause a contract to get "stuck" completely.
while (
voters[to].delegate != address(0) &&
voters[to].delegate != msg.sender
) {
while (voters[to].delegate != address(0)) {
to = voters[to].delegate;
}
// We found a loop in the delegation, not allowed.
if (to == msg.sender) {
throw;
// We found a loop in the delegation, not allowed.
if (to == msg.sender)
throw;
}
// Since `sender` is a reference, this