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@ -50,38 +50,40 @@ struct CDiskBlockPos
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};
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};
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enum BlockStatus {
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enum BlockStatus {
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// Unused.
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//! Unused.
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BLOCK_VALID_UNKNOWN = 0,
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BLOCK_VALID_UNKNOWN = 0,
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// Parsed, version ok, hash satisfies claimed PoW, 1 <= vtx count <= max, timestamp not in future
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//! Parsed, version ok, hash satisfies claimed PoW, 1 <= vtx count <= max, timestamp not in future
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BLOCK_VALID_HEADER = 1,
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BLOCK_VALID_HEADER = 1,
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// All parent headers found, difficulty matches, timestamp >= median previous, checkpoint. Implies all parents
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//! All parent headers found, difficulty matches, timestamp >= median previous, checkpoint. Implies all parents
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// are also at least TREE.
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//! are also at least TREE.
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BLOCK_VALID_TREE = 2,
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BLOCK_VALID_TREE = 2,
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// Only first tx is coinbase, 2 <= coinbase input script length <= 100, transactions valid, no duplicate txids,
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/**
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// sigops, size, merkle root. Implies all parents are at least TREE but not necessarily TRANSACTIONS. When all
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* Only first tx is coinbase, 2 <= coinbase input script length <= 100, transactions valid, no duplicate txids,
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// parent blocks also have TRANSACTIONS, CBlockIndex::nChainTx will be set.
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* sigops, size, merkle root. Implies all parents are at least TREE but not necessarily TRANSACTIONS. When all
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* parent blocks also have TRANSACTIONS, CBlockIndex::nChainTx will be set.
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*/
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BLOCK_VALID_TRANSACTIONS = 3,
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BLOCK_VALID_TRANSACTIONS = 3,
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// Outputs do not overspend inputs, no double spends, coinbase output ok, immature coinbase spends, BIP30.
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//! Outputs do not overspend inputs, no double spends, coinbase output ok, immature coinbase spends, BIP30.
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// Implies all parents are also at least CHAIN.
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//! Implies all parents are also at least CHAIN.
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BLOCK_VALID_CHAIN = 4,
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BLOCK_VALID_CHAIN = 4,
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// Scripts & signatures ok. Implies all parents are also at least SCRIPTS.
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//! Scripts & signatures ok. Implies all parents are also at least SCRIPTS.
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BLOCK_VALID_SCRIPTS = 5,
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BLOCK_VALID_SCRIPTS = 5,
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// All validity bits.
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//! All validity bits.
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BLOCK_VALID_MASK = BLOCK_VALID_HEADER | BLOCK_VALID_TREE | BLOCK_VALID_TRANSACTIONS |
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BLOCK_VALID_MASK = BLOCK_VALID_HEADER | BLOCK_VALID_TREE | BLOCK_VALID_TRANSACTIONS |
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BLOCK_VALID_CHAIN | BLOCK_VALID_SCRIPTS,
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BLOCK_VALID_CHAIN | BLOCK_VALID_SCRIPTS,
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BLOCK_HAVE_DATA = 8, // full block available in blk*.dat
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BLOCK_HAVE_DATA = 8, //! full block available in blk*.dat
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BLOCK_HAVE_UNDO = 16, // undo data available in rev*.dat
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BLOCK_HAVE_UNDO = 16, //! undo data available in rev*.dat
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BLOCK_HAVE_MASK = BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO,
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BLOCK_HAVE_MASK = BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO,
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BLOCK_FAILED_VALID = 32, // stage after last reached validness failed
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BLOCK_FAILED_VALID = 32, //! stage after last reached validness failed
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BLOCK_FAILED_CHILD = 64, // descends from failed block
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BLOCK_FAILED_CHILD = 64, //! descends from failed block
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BLOCK_FAILED_MASK = BLOCK_FAILED_VALID | BLOCK_FAILED_CHILD,
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BLOCK_FAILED_MASK = BLOCK_FAILED_VALID | BLOCK_FAILED_CHILD,
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};
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};
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@ -93,49 +95,50 @@ enum BlockStatus {
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class CBlockIndex
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class CBlockIndex
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{
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{
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public:
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public:
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// pointer to the hash of the block, if any. memory is owned by this CBlockIndex
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//! pointer to the hash of the block, if any. memory is owned by this CBlockIndex
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const uint256* phashBlock;
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const uint256* phashBlock;
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// pointer to the index of the predecessor of this block
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//! pointer to the index of the predecessor of this block
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CBlockIndex* pprev;
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CBlockIndex* pprev;
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// pointer to the index of some further predecessor of this block
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//! pointer to the index of some further predecessor of this block
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CBlockIndex* pskip;
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CBlockIndex* pskip;
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// height of the entry in the chain. The genesis block has height 0
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//! height of the entry in the chain. The genesis block has height 0
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int nHeight;
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int nHeight;
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// Which # file this block is stored in (blk?????.dat)
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//! Which # file this block is stored in (blk?????.dat)
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int nFile;
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int nFile;
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// Byte offset within blk?????.dat where this block's data is stored
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//! Byte offset within blk?????.dat where this block's data is stored
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unsigned int nDataPos;
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unsigned int nDataPos;
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// Byte offset within rev?????.dat where this block's undo data is stored
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//! Byte offset within rev?????.dat where this block's undo data is stored
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unsigned int nUndoPos;
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unsigned int nUndoPos;
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// (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block
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//! (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block
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uint256 nChainWork;
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uint256 nChainWork;
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// Number of transactions in this block.
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//! Number of transactions in this block.
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// Note: in a potential headers-first mode, this number cannot be relied upon
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//! Note: in a potential headers-first mode, this number cannot be relied upon
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unsigned int nTx;
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unsigned int nTx;
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// (memory only) Number of transactions in the chain up to and including this block.
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//! (memory only) Number of transactions in the chain up to and including this block.
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// This value will be non-zero only if and only if transactions for this block and all its parents are available.
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//! This value will be non-zero only if and only if transactions for this block and all its parents are available.
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unsigned int nChainTx; // change to 64-bit type when necessary; won't happen before 2030
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//! Change to 64-bit type when necessary; won't happen before 2030
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unsigned int nChainTx;
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// Verification status of this block. See enum BlockStatus
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//! Verification status of this block. See enum BlockStatus
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unsigned int nStatus;
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unsigned int nStatus;
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// block header
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//! block header
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int nVersion;
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int nVersion;
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uint256 hashMerkleRoot;
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uint256 hashMerkleRoot;
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unsigned int nTime;
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unsigned int nTime;
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unsigned int nBits;
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unsigned int nBits;
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unsigned int nNonce;
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unsigned int nNonce;
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// (memory only) Sequencial id assigned to distinguish order in which blocks are received.
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//! (memory only) Sequential id assigned to distinguish order in which blocks are received.
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uint32_t nSequenceId;
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uint32_t nSequenceId;
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void SetNull()
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void SetNull()
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@ -254,7 +257,7 @@ public:
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GetBlockHash().ToString());
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GetBlockHash().ToString());
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}
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}
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// Check whether this block index entry is valid up to the passed validity level.
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//! Check whether this block index entry is valid up to the passed validity level.
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bool IsValid(enum BlockStatus nUpTo = BLOCK_VALID_TRANSACTIONS) const
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bool IsValid(enum BlockStatus nUpTo = BLOCK_VALID_TRANSACTIONS) const
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{
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{
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assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
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assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
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@ -263,8 +266,8 @@ public:
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return ((nStatus & BLOCK_VALID_MASK) >= nUpTo);
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return ((nStatus & BLOCK_VALID_MASK) >= nUpTo);
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}
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}
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// Raise the validity level of this block index entry.
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//! Raise the validity level of this block index entry.
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// Returns true if the validity was changed.
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//! Returns true if the validity was changed.
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bool RaiseValidity(enum BlockStatus nUpTo)
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bool RaiseValidity(enum BlockStatus nUpTo)
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{
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{
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assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
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assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed.
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@ -277,10 +280,10 @@ public:
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return false;
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return false;
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}
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}
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// Build the skiplist pointer for this entry.
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//! Build the skiplist pointer for this entry.
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void BuildSkip();
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void BuildSkip();
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// Efficiently find an ancestor of this block.
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//! Efficiently find an ancestor of this block.
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CBlockIndex* GetAncestor(int height);
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CBlockIndex* GetAncestor(int height);
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const CBlockIndex* GetAncestor(int height) const;
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const CBlockIndex* GetAncestor(int height) const;
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};
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};
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