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| author | Denton Liu <liu.denton+github@gmail.com> | 2016-06-02 01:59:16 +0800 |
|---|---|---|
| committer | Denton Liu <liu.denton+github@gmail.com> | 2016-06-02 01:59:16 +0800 |
| commit | 1f19b938366364acb7b628dbefa9af9249bf936d (patch) | |
| tree | 836f92c5c4feb96f100f49fce59aa4fb8dcb2cfb /docs | |
| parent | f03d315bad93f0c5660b5b83520ec8fdece7194b (diff) | |
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Copied warning message from cherry-picked commit
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/units-and-global-variables.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/docs/units-and-global-variables.rst b/docs/units-and-global-variables.rst index aa3551bf..ee9d60d6 100644 --- a/docs/units-and-global-variables.rst +++ b/docs/units-and-global-variables.rst @@ -124,9 +124,10 @@ Address Related For more information, see the section on :ref:`address`. .. warning:: - Since it is possible for calls to ``send`` to fail, such as - if there are insufficient funds, it is good practice to - check the return value whenever calling ``send``. + There are some dangers in using ``send``: The transfer fails if the call stack depth is at 1023 + (this can always be forced by the caller) and it also fails if the recipient runs out of gas. So in order + to make safe Ether transfers, always check the return value of ``send`` or even better: + Use a pattern where the recipient withdraws the money. .. index:: this, selfdestruct |