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Merge pull request #9847 from ethereum/extocdesizecheck

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[DOC] Add note about extcodesize check.
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chriseth 2020-09-21 16:28:59 +02:00 committed by GitHub
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@ -105,8 +105,12 @@ otherwise, the ``value`` option would not be available.
parentheses at the end perform the actual call. So in this case, the parentheses at the end perform the actual call. So in this case, the
function is not called and the ``value`` and ``gas`` settings are lost. function is not called and the ``value`` and ``gas`` settings are lost.
Function calls cause exceptions if the called contract does not exist (in the Due to the fact that the EVM considers a call to a non-existing contract to
sense that the account does not contain code) or if the called contract itself always succeed, Solidity uses the ``extcodesize`` opcode to check that
the contract that is about to be called actually exists (it contains code)
and causes an exception if it does not.
Function calls also cause exceptions if the called contract itself
throws an exception or goes out of gas. throws an exception or goes out of gas.
.. warning:: .. warning::