diff options
Diffstat (limited to 'docs/frequently-asked-questions.rst')
| -rw-r--r-- | docs/frequently-asked-questions.rst | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/docs/frequently-asked-questions.rst b/docs/frequently-asked-questions.rst index 645789ce..00d9e043 100644 --- a/docs/frequently-asked-questions.rst +++ b/docs/frequently-asked-questions.rst @@ -89,19 +89,6 @@ In this example:: } } -What does the following strange check do in the Custom Token contract? -====================================================================== - -:: - - require((balanceOf[_to] + _value) >= balanceOf[_to]); - -Integers in Solidity (and most other machine-related programming languages) are restricted to a certain range. -For ``uint256``, this is ``0`` up to ``2**256 - 1``. If the result of some operation on those numbers -does not fit inside this range, it is truncated. These truncations can have -`serious consequences <https://en.bitcoin.it/wiki/Value_overflow_incident>`_, so code like the one -above is necessary to avoid certain attacks. - More Questions? =============== |