diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/solidity-by-example.rst | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/docs/solidity-by-example.rst b/docs/solidity-by-example.rst index 7dd51f00..4051cd94 100644 --- a/docs/solidity-by-example.rst +++ b/docs/solidity-by-example.rst @@ -278,14 +278,21 @@ activate themselves. } /// Withdraw a bid that was overbid. - function withdraw() { + function withdraw() returns (bool) { var amount = pendingReturns[msg.sender]; - // It is important to set this to zero because the recipient - // can call this function again as part of the receiving call - // before `send` returns. - pendingReturns[msg.sender] = 0; - if (!msg.sender.send(amount)) - throw; // If anything fails, this will revert the changes above + if (amount > 0) { + // It is important to set this to zero because the recipient + // can call this function again as part of the receiving call + // before `send` returns. + pendingReturns[msg.sender] = 0; + + if (!msg.sender.send(amount)) { + // No need to call throw here, just reset the amount owing + pendingReturns[msg.sender] = amount; + return false; + } + } + return true; } /// End the auction and send the highest bid @@ -489,15 +496,22 @@ high or low invalid bids. } /// Withdraw a bid that was overbid. - function withdraw() { + function withdraw() returns (bool) { var amount = pendingReturns[msg.sender]; - // It is important to set this to zero because the recipient - // can call this function again as part of the receiving call - // before `send` returns (see the remark above about - // conditions -> effects -> interaction). - pendingReturns[msg.sender] = 0; - if (!msg.sender.send(amount)) - throw; // If anything fails, this will revert the changes above + if (amount > 0) { + // It is important to set this to zero because the recipient + // can call this function again as part of the receiving call + // before `send` returns (see the remark above about + // conditions -> effects -> interaction). + pendingReturns[msg.sender] = 0; + + if (!msg.sender.send(amount)){ + // No need to call throw here, just reset the amount owing + pendingReturns[msg.sender] = amount; + return false; + } + } + return true; } /// End the auction and send the highest bid |