move-only: move coins statistics utils out of RPC

These procedures will later be used in the ChainstateManager to compute
statistics (particularly a content hash) for UTXO sets coming in from
snapshots.

1 files changed, 1 insertions, 71 deletions

diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index a74003149d..7161c39ffd 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -10,6 +10,7 @@
 #include <chain.h>
 #include <chainparams.h>
 #include <coins.h>
+#include <node/coinstats.h>
 #include <consensus/validation.h>
 #include <core_io.h>
 #include <hash.h>
@@ -909,77 +910,6 @@ static UniValue getblock(const JSONRPCRequest& request)
     return blockToJSON(block, tip, pblockindex, verbosity >= 2);
 }
 
-struct CCoinsStats
-{
-    int nHeight;
-    uint256 hashBlock;
-    uint64_t nTransactions;
-    uint64_t nTransactionOutputs;
-    uint64_t nBogoSize;
-    uint256 hashSerialized;
-    uint64_t nDiskSize;
-    CAmount nTotalAmount;
-
-    CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nBogoSize(0), nDiskSize(0), nTotalAmount(0) {}
-};
-
-static void ApplyStats(CCoinsStats &stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
-{
-    assert(!outputs.empty());
-    ss << hash;
-    ss << VARINT(outputs.begin()->second.nHeight * 2 + outputs.begin()->second.fCoinBase ? 1u : 0u);
-    stats.nTransactions++;
-    for (const auto& output : outputs) {
-        ss << VARINT(output.first + 1);
-        ss << output.second.out.scriptPubKey;
-        ss << VARINT(output.second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
-        stats.nTransactionOutputs++;
-        stats.nTotalAmount += output.second.out.nValue;
-        stats.nBogoSize += 32 /* txid */ + 4 /* vout index */ + 4 /* height + coinbase */ + 8 /* amount */ +
-                           2 /* scriptPubKey len */ + output.second.out.scriptPubKey.size() /* scriptPubKey */;
-    }
-    ss << VARINT(0u);
-}
-
-//! Calculate statistics about the unspent transaction output set
-static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
-{
-    std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
-    assert(pcursor);
-
-    CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
-    stats.hashBlock = pcursor->GetBestBlock();
-    {
-        LOCK(cs_main);
-        stats.nHeight = LookupBlockIndex(stats.hashBlock)->nHeight;
-    }
-    ss << stats.hashBlock;
-    uint256 prevkey;
-    std::map<uint32_t, Coin> outputs;
-    while (pcursor->Valid()) {
-        boost::this_thread::interruption_point();
-        COutPoint key;
-        Coin coin;
-        if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
-            if (!outputs.empty() && key.hash != prevkey) {
-                ApplyStats(stats, ss, prevkey, outputs);
-                outputs.clear();
-            }
-            prevkey = key.hash;
-            outputs[key.n] = std::move(coin);
-        } else {
-            return error("%s: unable to read value", __func__);
-        }
-        pcursor->Next();
-    }
-    if (!outputs.empty()) {
-        ApplyStats(stats, ss, prevkey, outputs);
-    }
-    stats.hashSerialized = ss.GetHash();
-    stats.nDiskSize = view->EstimateSize();
-    return true;
-}
-
 static UniValue pruneblockchain(const JSONRPCRequest& request)
 {
             RPCHelpMan{"pruneblockchain", "",