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@ -395,10 +395,7 @@ public:
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// return the block at the top of the blockchain
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virtual block get_top_block() const = 0;
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// return the index of the top block on the chain
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// NOTE: for convenience using heights as indices, this is not the total
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// size of the blockchain, but rather the index of the top block. As the
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// chain is 0-indexed, the total size will be height() + 1.
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// return the height of the chain
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virtual uint64_t height() const = 0;
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// pops the top block off the blockchain.
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