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Block ancient dust spam #140

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Block ancient dust spam #140

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Commits on Nov 20, 2014

  1. Add CTxIndex::GetHeight routine. 

    Split the old code of CTxIndex::GetDepthInMainChain to allow also
GetHeight() and GetContainingBlock() to be used.
    @domob1812
    domob1812 committed Nov 20, 2014
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  2. Add IsUnspendable method, blocking dust spam outputs. 

    Implement IsUnspendable() as additional check when verifying
transactions.  This method checks for provably unspendable outputs (will
be useful later on for the UTXO set), and it also blocks dust spam
outputs created between blocks 39k and 41k from being spent in the
future.  This enables them to be removed from the UTXO set.
    @domob1812
    domob1812 committed Nov 20, 2014
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  3. Block dust spam tx from mempool before fork point. 

    Don't accept dust spam tx to the mempool even before the fork point.
Blocks with them are still considered valid, though.
    @domob1812
    domob1812 committed Nov 20, 2014
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