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Headers-first synchronization

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Many changes:
* Do not use 'getblocks', but 'getheaders', and use it to build a headers tree.
* Blocks are fetched in parallel from all available outbound peers, using a
  limited moving window. When one peer stalls the movement of the window, it is
  disconnected.
* No more orphan blocks. At all. We only ever request a block for which we have
  verified the headers, and store it to disk immediately. This means that a
  disk-fill attack would require PoW.
* Require protocol version 31800 for every peer (released in december 2010).
* No more syncnode (we sync from everyone we can, though limited to 1 during
  initial *headers* sync).
* Introduce some extra named constants, comments and asserts.
This commit is contained in:
Pieter Wuille
2014-07-12 00:02:35 +02:00
parent 992ab87114
commit 341735eb8f
9 changed files with 375 additions and 370 deletions
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23
src/qt/forms/rpcconsole.ui
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@@ -836,29 +836,6 @@
</property>
</widget>
</item>
<item row="4" column="0">
<widget class="QLabel" name="label_25">
<property name="text">
<string>Sync Node</string>
</property>
</widget>
</item>
<item row="4" column="2">
<widget class="QLabel" name="peerSyncNode">
<property name="cursor">
<cursorShape>IBeamCursor</cursorShape>
</property>
<property name="text">
<string>N/A</string>
</property>
<property name="textFormat">
<enum>Qt::PlainText</enum>
</property>
<property name="textInteractionFlags">
<set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
</property>
</widget>
</item>
<item row="5" column="0">
<widget class="QLabel" name="label_29">
<property name="text">