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Remove FAQ item on killing contracts

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Chris Ward 2018-12-12 14:42:49 +01:00
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docs/frequently-asked-questions.rst
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@ -9,29 +9,6 @@ This list was originally compiled by `fivedogit <mailto:fivedogit@gmail.com>`_.
Basic Questions
***************
Create a contract that can be killed and return funds
=====================================================
First, a word of warning: Killing contracts sounds like a good idea, because "cleaning up"
is always good, but as seen above, it does not really clean up. Furthermore,
if Ether is sent to removed contracts, the Ether will be forever lost.
If you want to deactivate your contracts, it is preferable to **disable** them by changing some
internal state which causes all functions to throw. This will make it impossible
to use the contract and ether sent to the contract will be returned automatically.
Now to answering the question: Inside a constructor, ``msg.sender`` is the
creator. Save it. Then ``selfdestruct(creator);`` to kill and return funds.
`example <https://github.com/fivedogit/solidity-baby-steps/blob/master/contracts/05_greeter.sol>`_
Note that if you ``import "mortal"`` at the top of your contracts and declare
``contract SomeContract is mortal { ...`` and compile with a compiler that already
has it (which includes `Remix <https://remix.ethereum.org/>`_), then
``kill()`` is taken care of for you. Once a contract is "mortal", then you can
``contractname.kill.sendTransaction({from:eth.coinbase})``, just the same as my
examples.
If I return an ``enum``, I only get integer values in web3.js. How to get the named values?
===========================================================================================