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Merge pull request #7313 from ethereum/chriseth-patch-1

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[DOCS] Protection to not lose money.
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chriseth 2019-08-28 20:21:43 +02:00 committed by GitHub
commit a82fbf7322
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1 changed files with 11 additions and 19 deletions
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docs/common-patterns.rst
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@ -41,15 +41,11 @@ become the new richest.
mostSent = msg.value; mostSent = msg.value;
} }
function becomeRichest() public payable returns (bool) { function becomeRichest() public payable {
if (msg.value > mostSent) { require(msg.value > mostSent, "Not enough money sent.");
pendingWithdrawals[richest] += msg.value; pendingWithdrawals[richest] += msg.value;
richest = msg.sender; richest = msg.sender;
mostSent = msg.value; mostSent = msg.value;
return true;
} else {
return false;
}
} }
function withdraw() public { function withdraw() public {
@ -76,16 +72,12 @@ This is as opposed to the more intuitive sending pattern:
mostSent = msg.value; mostSent = msg.value;
} }
function becomeRichest() public payable returns (bool) { function becomeRichest() public payable {
if (msg.value > mostSent) { require(msg.value > mostSent, "Not enough money sent.");
// This line can cause problems (explained below). // This line can cause problems (explained below).
richest.transfer(msg.value); richest.transfer(msg.value);
richest = msg.sender; richest = msg.sender;
mostSent = msg.value; mostSent = msg.value;
return true;
} else {
return false;
}
} }
} }