Merge pull request #5181

afd4b94 Move CMerkleBlock and CPartialMerkleTree to their own file (Matt Corallo)

1 files changed, 0 insertions, 138 deletions

diff --git a/src/main.h b/src/main.h
index f3d30fafb3..8f0378647d 100644
--- a/src/main.h
+++ b/src/main.h
@@ -49,8 +49,6 @@ class CValidationState;
 struct CBlockTemplate;
 struct CNodeStateStats;
 
-/** The maximum allowed size for a serialized block, in bytes (network rule) */
-static const unsigned int MAX_BLOCK_SIZE = 1000000;
 /** Default for -blockmaxsize and -blockminsize, which control the range of sizes the mining code will create **/
 static const unsigned int DEFAULT_BLOCK_MAX_SIZE = 750000;
 static const unsigned int DEFAULT_BLOCK_MIN_SIZE = 0;
@@ -358,110 +356,6 @@ public:
     ScriptError GetScriptError() const { return error; }
 };
 
-/** Data structure that represents a partial merkle tree.
- *
- * It represents a subset of the txid's of a known block, in a way that
- * allows recovery of the list of txid's and the merkle root, in an
- * authenticated way.
- *
- * The encoding works as follows: we traverse the tree in depth-first order,
- * storing a bit for each traversed node, signifying whether the node is the
- * parent of at least one matched leaf txid (or a matched txid itself). In
- * case we are at the leaf level, or this bit is 0, its merkle node hash is
- * stored, and its children are not explorer further. Otherwise, no hash is
- * stored, but we recurse into both (or the only) child branch. During
- * decoding, the same depth-first traversal is performed, consuming bits and
- * hashes as they written during encoding.
- *
- * The serialization is fixed and provides a hard guarantee about the
- * encoded size:
- *
- *   SIZE <= 10 + ceil(32.25*N)
- *
- * Where N represents the number of leaf nodes of the partial tree. N itself
- * is bounded by:
- *
- *   N <= total_transactions
- *   N <= 1 + matched_transactions*tree_height
- *
- * The serialization format:
- *  - uint32     total_transactions (4 bytes)
- *  - varint     number of hashes   (1-3 bytes)
- *  - uint256[]  hashes in depth-first order (<= 32*N bytes)
- *  - varint     number of bytes of flag bits (1-3 bytes)
- *  - byte[]     flag bits, packed per 8 in a byte, least significant bit first (<= 2*N-1 bits)
- * The size constraints follow from this.
- */
-class CPartialMerkleTree
-{
-protected:
-    /** the total number of transactions in the block */
-    unsigned int nTransactions;
-
-    /** node-is-parent-of-matched-txid bits */
-    std::vector<bool> vBits;
-
-    /** txids and internal hashes */
-    std::vector<uint256> vHash;
-
-    /** flag set when encountering invalid data */
-    bool fBad;
-
-    /** helper function to efficiently calculate the number of nodes at given height in the merkle tree */
-    unsigned int CalcTreeWidth(int height) {
-        return (nTransactions+(1 << height)-1) >> height;
-    }
-
-    /** calculate the hash of a node in the merkle tree (at leaf level: the txid's themselves) */
-    uint256 CalcHash(int height, unsigned int pos, const std::vector<uint256> &vTxid);
-
-    /** recursive function that traverses tree nodes, storing the data as bits and hashes */
-    void TraverseAndBuild(int height, unsigned int pos, const std::vector<uint256> &vTxid, const std::vector<bool> &vMatch);
-
-    /**
-     * recursive function that traverses tree nodes, consuming the bits and hashes produced by TraverseAndBuild.
-     * it returns the hash of the respective node.
-     */
-    uint256 TraverseAndExtract(int height, unsigned int pos, unsigned int &nBitsUsed, unsigned int &nHashUsed, std::vector<uint256> &vMatch);
-
-public:
-
-    /** serialization implementation */
-    ADD_SERIALIZE_METHODS;
-
-    template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        READWRITE(nTransactions);
-        READWRITE(vHash);
-        std::vector<unsigned char> vBytes;
-        if (ser_action.ForRead()) {
-            READWRITE(vBytes);
-            CPartialMerkleTree &us = *(const_cast<CPartialMerkleTree*>(this));
-            us.vBits.resize(vBytes.size() * 8);
-            for (unsigned int p = 0; p < us.vBits.size(); p++)
-                us.vBits[p] = (vBytes[p / 8] & (1 << (p % 8))) != 0;
-            us.fBad = false;
-        } else {
-            vBytes.resize((vBits.size()+7)/8);
-            for (unsigned int p = 0; p < vBits.size(); p++)
-                vBytes[p / 8] |= vBits[p] << (p % 8);
-            READWRITE(vBytes);
-        }
-    }
-
-    /** Construct a partial merkle tree from a list of transaction id's, and a mask that selects a subset of them */
-    CPartialMerkleTree(const std::vector<uint256> &vTxid, const std::vector<bool> &vMatch);
-
-    CPartialMerkleTree();
-
-    /**
-     * extract the matching txid's represented by this partial merkle tree.
-     * returns the merkle root, or 0 in case of failure
-     */
-    uint256 ExtractMatches(std::vector<uint256> &vMatch);
-};
-
-
 
 /** Functions for disk access for blocks */
 bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos);
@@ -652,38 +546,6 @@ struct CBlockTemplate
 
 
 
-/** 
- * Used to relay blocks as header + vector<merkle branch>
- * to filtered nodes.
- */
-class CMerkleBlock
-{
-public:
-    /** Public only for unit testing */
-    CBlockHeader header;
-    CPartialMerkleTree txn;
-
-public:
-    /** Public only for unit testing and relay testing (not relayed) */
-    std::vector<std::pair<unsigned int, uint256> > vMatchedTxn;
-
-    /**
-     * Create from a CBlock, filtering transactions according to filter
-     * Note that this will call IsRelevantAndUpdate on the filter for each transaction,
-     * thus the filter will likely be modified.
-     */
-    CMerkleBlock(const CBlock& block, CBloomFilter& filter);
-
-    ADD_SERIALIZE_METHODS;
-
-    template <typename Stream, typename Operation>
-    inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
-        READWRITE(header);
-        READWRITE(txn);
-    }
-};
-
-
 class CValidationInterface {
 protected:
     virtual void SyncTransaction(const CTransaction &tx, const CBlock *pblock) {};