dash/blackcoin-more
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

txdb: Add Cursor() method to CCoinsView to iterate over UTXO set

Browse Source 
Add a method Cursor() to CCoinsView that returns a cursor which can be
used to iterate over the whole UTXO set.

- rpc: Change gettxoutsetinfo to use new Cursor method

- txdb: Remove GetStats method - Now that GetStats is implemented in
  terms of Cursor, remove it.
This commit is contained in:
Wladimir J. van der Laan
2016-03-28 18:18:30 +02:00
parent 1b2460bd58
commit 509cb006d5
6 changed files with 148 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
src/rpc/blockchain.cpp
View File

@@ -18,11 +18,14 @@
#include "txmempool.h"
#include "util.h"
#include "utilstrencodings.h"
#include "hash.h"
#include <stdint.h>
#include <univalue.h>
#include <boost/thread/thread.hpp> // boost::thread::interrupt
using namespace std;
extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
@@ -432,6 +435,59 @@ UniValue getblock(const UniValue& params, bool fHelp)
return blockToJSON(block, pblockindex);
}
struct CCoinsStats
{
int nHeight;
uint256 hashBlock;
uint64_t nTransactions;
uint64_t nTransactionOutputs;
uint64_t nSerializedSize;
uint256 hashSerialized;
CAmount nTotalAmount;
CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nSerializedSize(0), nTotalAmount(0) {}
};
//! Calculate statistics about the unspent transaction output set
static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
{
boost::scoped_ptr<CCoinsViewCursor> pcursor(view->Cursor());
CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
stats.hashBlock = pcursor->GetBestBlock();
{
LOCK(cs_main);
stats.nHeight = mapBlockIndex.find(stats.hashBlock)->second->nHeight;
}
ss << stats.hashBlock;
CAmount nTotalAmount = 0;
while (pcursor->Valid()) {
boost::this_thread::interruption_point();
uint256 key;
CCoins coins;
if (pcursor->GetKey(key) && pcursor->GetValue(coins)) {
stats.nTransactions++;
for (unsigned int i=0; i<coins.vout.size(); i++) {
const CTxOut &out = coins.vout[i];
if (!out.IsNull()) {
stats.nTransactionOutputs++;
ss << VARINT(i+1);
ss << out;
nTotalAmount += out.nValue;
}
}
stats.nSerializedSize += 32 + pcursor->GetValueSize();
ss << VARINT(0);
} else {
return error("%s: unable to read value", __func__);
}
pcursor->Next();
}
stats.hashSerialized = ss.GetHash();
stats.nTotalAmount = nTotalAmount;
return true;
}
UniValue gettxoutsetinfo(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() != 0)
@@ -458,7 +514,7 @@ UniValue gettxoutsetinfo(const UniValue& params, bool fHelp)
CCoinsStats stats;
FlushStateToDisk();
if (pcoinsTip->GetStats(stats)) {
if (GetUTXOStats(pcoinsTip, stats)) {
ret.push_back(Pair("height", (int64_t)stats.nHeight));
ret.push_back(Pair("bestblock", stats.hashBlock.GetHex()));
ret.push_back(Pair("transactions", (int64_t)stats.nTransactions));