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Add mapSerials infrastructure to CCoinsView.

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This adds the TXDB/CCoinsViewCache primitives necessary for
writing consensus rules for mapSerials later.
This commit is contained in:
Sean Bowe
2016-01-04 03:34:58 -07:00
parent 9f25631d50
commit 45d6bee945
5 changed files with 168 additions and 10 deletions
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31
src/coins.h
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@@ -311,8 +311,21 @@ struct CAnchorsCacheEntry
CAnchorsCacheEntry() : entered(false), flags(0), tree(INCREMENTAL_MERKLE_TREE_DEPTH) {}
};
struct CSerialsCacheEntry
{
bool entered; // If the serial is spent or not
unsigned char flags;
enum Flags {
DIRTY = (1 << 0), // This cache entry is potentially different from the version in the parent view.
};
CSerialsCacheEntry() : entered(false), flags(0) {}
};
typedef boost::unordered_map<uint256, CCoinsCacheEntry, CCoinsKeyHasher> CCoinsMap;
typedef boost::unordered_map<uint256, CAnchorsCacheEntry, CCoinsKeyHasher> CAnchorsMap;
typedef boost::unordered_map<uint256, CSerialsCacheEntry, CCoinsKeyHasher> CSerialsMap;
struct CCoinsStats
{
@@ -335,6 +348,9 @@ public:
//! Retrieve the tree at a particular anchored root in the chain
virtual bool GetAnchorAt(const uint256 &rt, libzerocash::IncrementalMerkleTree &tree) const;
//! Determine whether a serial is spent or not
virtual bool GetSerial(const uint256 &serial) const;
//! Retrieve the CCoins (unspent transaction outputs) for a given txid
virtual bool GetCoins(const uint256 &txid, CCoins &coins) const;
@@ -353,7 +369,8 @@ public:
virtual bool BatchWrite(CCoinsMap &mapCoins,
const uint256 &hashBlock,
const uint256 &hashAnchor,
CAnchorsMap &mapAnchors);
CAnchorsMap &mapAnchors,
CSerialsMap &mapSerials);
//! Calculate statistics about the unspent transaction output set
virtual bool GetStats(CCoinsStats &stats) const;
@@ -372,6 +389,7 @@ protected:
public:
CCoinsViewBacked(CCoinsView *viewIn);
bool GetAnchorAt(const uint256 &rt, libzerocash::IncrementalMerkleTree &tree) const;
bool GetSerial(const uint256 &serial) const;
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
@@ -380,7 +398,8 @@ public:
bool BatchWrite(CCoinsMap &mapCoins,
const uint256 &hashBlock,
const uint256 &hashAnchor,
CAnchorsMap &mapAnchors);
CAnchorsMap &mapAnchors,
CSerialsMap &mapSerials);
bool GetStats(CCoinsStats &stats) const;
};
@@ -423,6 +442,7 @@ protected:
mutable CCoinsMap cacheCoins;
mutable uint256 hashAnchor;
mutable CAnchorsMap cacheAnchors;
mutable CSerialsMap cacheSerials;
/* Cached dynamic memory usage for the inner CCoins objects. */
mutable size_t cachedCoinsUsage;
@@ -433,6 +453,7 @@ public:
// Standard CCoinsView methods
bool GetAnchorAt(const uint256 &rt, libzerocash::IncrementalMerkleTree &tree) const;
bool GetSerial(const uint256 &serial) const;
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool HaveCoins(const uint256 &txid) const;
uint256 GetBestBlock() const;
@@ -441,7 +462,8 @@ public:
bool BatchWrite(CCoinsMap &mapCoins,
const uint256 &hashBlock,
const uint256 &hashAnchor,
CAnchorsMap &mapAnchors);
CAnchorsMap &mapAnchors,
CSerialsMap &mapSerials);
// Adds the tree to mapAnchors and sets the current commitment
@@ -452,6 +474,9 @@ public:
// the new current root.
void PopAnchor(const uint256 &rt);
// Marks a serial as spent or not.
void SetSerial(const uint256 &serial, bool spent);
/**
* Return a pointer to CCoins in the cache, or NULL if not found. This is
* more efficient than GetCoins. Modifications to other cache entries are