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Merge the selfdestruct sections

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Alex Beregszaszi 2016-10-14 10:51:18 +01:00
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2 changed files with 9 additions and 12 deletions
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7
docs/frequently-asked-questions.rst
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@ -71,13 +71,6 @@ several blockchain explorers.
Contracts on the blockchain should have their original source
code published if they are to be used by third parties.
Does ``selfdestruct()`` free up space in the blockchain?
========================================================
It removes the contract bytecode and storage from the current block
into the future, but since the blockchain stores every single block (i.e.
all history), this will not actually free up space on full/archive nodes.
Create a contract that can be killed and return funds
=====================================================

14
docs/introduction-to-smart-contracts.rst
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@ -455,13 +455,17 @@ receives the address of the new contract on the stack.
.. index:: selfdestruct
``selfdestruct``
================
Self-destruct
=============
The only possibility that code is removed from the blockchain is
when a contract at that address performs the ``selfdestruct`` operation.
The remaining Ether stored at that address is sent to a designated
target and then the storage and code is removed.
target and then the storage and code is removed from the state.
Note that even if a contract's code does not contain a call to ``selfdestruct``,
it can still perform that operation using ``delegatecall`` or ``callcode``.
.. warning:: Even if a contract's code does not contain a call to ``selfdestruct``,
it can still perform that operation using ``delegatecall`` or ``callcode``.
.. note:: The pruning of old contracts may or may not be implemented by Ethereum
clients. Additionally, archive nodes could choose to keep the contract storage
and code indefinitely.