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RPC: Introduce getblockstats
This commit is contained in:
Jorge Timón
parent
938b5090a0
commit
bcb509cf0f
2 changed files with 295 additions and 0 deletions
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@ -25,6 +25,7 @@
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#include <univalue.h>
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#include <boost/algorithm/string.hpp>
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#include <boost/thread/thread.hpp> // boost::thread::interrupt
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#include <mutex>
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@ -1434,10 +1435,302 @@ UniValue reconsiderblock(const JSONRPCRequest& request)
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return NullUniValue;
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}
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template<typename T>
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static T CalculateTruncatedMedian(std::vector<T>& scores)
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{
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size_t size = scores.size();
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if (size == 0) {
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return 0;
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}
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std::sort(scores.begin(), scores.end());
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if (size % 2 == 0) {
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return (scores[size / 2 - 1] + scores[size / 2]) / 2;
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} else {
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return scores[size / 2];
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}
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}
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template<typename T>
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static inline bool SetHasKeys(const std::set<T>& set) {return false;}
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template<typename T, typename Tk, typename... Args>
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static inline bool SetHasKeys(const std::set<T>& set, const Tk& key, const Args&... args)
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{
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return (set.count(key) != 0) || SetHasKeys(set, args...);
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}
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// outpoint (needed for the utxo index) + nHeight + fCoinBase
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static constexpr size_t PER_UTXO_OVERHEAD = sizeof(COutPoint) + sizeof(uint32_t) + sizeof(bool);
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static UniValue getblockstats(const JSONRPCRequest& request)
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{
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if (request.fHelp || request.params.size() < 1 || request.params.size() > 4)
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throw std::runtime_error(
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"getblockstats ( hash_or_height stats )\n"
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"\nCompute per block statistics for a given window. All amounts are in satoshis.\n"
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"\nIt won't work for some heights with pruning.\n"
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// "\nIt won't work without -txindex for utxo_size_inc, *fee or *feerate stats.\n"
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"\nArguments:\n"
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"1. \"hash_or_height\" (string or numeric, required) The block hash or height of the target block. If height, negative values count back from the current tip\n"
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"2. \"stats\" (array, optional) Values to plot, by default all values, see result below)"
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" ["
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" \"height\", (string, optional) Selected statistic\n"
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" \"time\", (string, optional) Selected statistic\n"
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" ,...\n"
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" ]\n"
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"\nResult: (all values are in reverse order height-wise)\n"
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"{ (json object)\n"
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" \"avgfee\": xxxxx, (numeric) Average fee in the block\n"
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" \"avgfeerate\": xxxxx, (numeric) Average feerate (in satoshis per virtual byte)\n"
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" \"avgtxsize\": xxxxx, (numeric) Average transaction size\n"
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" \"blockhash\": xxxxx, (string) The block hash (to check for potential reorgs)\n"
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" \"height\": xxxxx, (numeric) The height of the block\n"
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" \"ins\": xxxxx, (numeric) The number of inputs (excluding coinbase)\n"
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" \"maxfee\": xxxxx, (numeric) Maximum fee in the block\n"
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" \"maxfeerate\": xxxxx, (numeric) Maximum feerate (in satoshis per virtual byte)\n"
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" \"maxtxsize\": xxxxx, (numeric) Maximum transaction size\n"
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" \"medianfee\": xxxxx, (numeric) Truncated median fee in the block\n"
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" \"medianfeerate\": xxxxx, (numeric) Truncated median feerate (in satoshis per virtual byte)\n"
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" \"mediantime\": xxxxx, (numeric) The block median time past\n"
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" \"mediantxsize\": xxxxx, (numeric) Truncated median transaction size\n"
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" \"minfee\": xxxxx, (numeric) Minimum fee in the block\n"
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" \"minfeerate\": xxxxx, (numeric) Minimum feerate (in satoshis per virtual byte)\n"
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" \"mintxsize\": xxxxx, (numeric) Minimum transaction size\n"
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" \"outs\": xxxxx, (numeric) The number of outputs\n"
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" \"subsidy\": xxxxx, (numeric) The block subsidy\n"
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" \"swtotal_size\": xxxxx, (numeric) Total size of all segwit transactions\n"
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" \"swtotal_weight\": xxxxx, (numeric) Total weight of all segwit transactions divided by segwit scale factor (4)\n"
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" \"swtxs\": xxxxx, (numeric) The number of segwit transactions\n"
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" \"time\": xxxxx, (numeric) The block time\n"
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" \"total_out\": xxxxx, (numeric) Total amount in all outputs (excluding coinbase and thus reward [ie subsidy + totalfee])\n"
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" \"total_size\": xxxxx, (numeric) Total size of all non-coinbase transactions\n"
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" \"total_weight\": xxxxx, (numeric) Total weight of all non-coinbase transactions divided by segwit scale factor (4)\n"
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" \"totalfee\": xxxxx, (numeric) The fee total\n"
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" \"txs\": xxxxx, (numeric) The number of transactions (excluding coinbase)\n"
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" \"utxo_increase\": xxxxx, (numeric) The increase/decrease in the number of unspent outputs\n"
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" \"utxo_size_inc\": xxxxx, (numeric) The increase/decrease in size for the utxo index (not discounting op_return and similar)\n"
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"}\n"
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"\nExamples:\n"
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+ HelpExampleCli("getblockstats", "1000 '[\"minfeerate\",\"avgfeerate\"]'")
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+ HelpExampleRpc("getblockstats", "1000 '[\"minfeerate\",\"avgfeerate\"]'")
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);
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LOCK(cs_main);
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CBlockIndex* pindex;
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if (request.params[0].isNum()) {
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const int height = request.params[0].get_int();
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const int current_tip = chainActive.Height();
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if (height < 0) {
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Target block height %d is negative", height));
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}
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if (height > current_tip) {
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Target block height %d after current tip %d", height, current_tip));
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}
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pindex = chainActive[height];
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} else {
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const std::string strHash = request.params[0].get_str();
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const uint256 hash(uint256S(strHash));
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pindex = mapBlockIndex[hash];
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}
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if (!pindex) {
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throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
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}
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if (!chainActive.Contains(pindex)) {
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Block is not in chain %s", Params().NetworkIDString()));
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}
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assert(pindex != nullptr);
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std::set<std::string> stats;
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if (!request.params[1].isNull()) {
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const UniValue stats_univalue = request.params[1].get_array();
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for (unsigned int i = 0; i < stats_univalue.size(); i++) {
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const std::string stat = stats_univalue[i].get_str();
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stats.insert(stat);
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}
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}
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const CAsset asset = policyAsset; // TODO Make configurable
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const CBlock block = GetBlockChecked(pindex);
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const bool do_all = stats.size() == 0; // Calculate everything if nothing selected (default)
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const bool do_mediantxsize = do_all || stats.count("mediantxsize") != 0;
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const bool do_medianfee = do_all || stats.count("medianfee") != 0;
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const bool do_medianfeerate = do_all || stats.count("medianfeerate") != 0;
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const bool loop_inputs = do_all || stats.count("utxo_size_inc");
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const bool loop_outputs = do_all || do_medianfee || do_medianfeerate || loop_inputs ||
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SetHasKeys(stats, "totalfee", "avgfee", "avgfeerate", "minfee", "maxfee", "minfeerate", "maxfeerate", "total_out");
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const bool do_calculate_size = do_mediantxsize ||
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SetHasKeys(stats, "total_size", "avgtxsize", "mintxsize", "maxtxsize", "swtotal_size");
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const bool do_calculate_weight = do_all || SetHasKeys(stats, "total_weight", "avgfeerate", "swtotal_weight", "avgfeerate", "medianfeerate", "minfeerate", "maxfeerate");
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const bool do_calculate_sw = do_all || SetHasKeys(stats, "swtxs", "swtotal_size", "swtotal_weight");
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CAmount maxfee = 0;
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CAmount maxfeerate = 0;
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CAmount minfee = MAX_MONEY;
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CAmount minfeerate = MAX_MONEY;
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CAmount total_out = 0;
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CAmount totalfee = 0;
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int64_t inputs = 0;
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int64_t maxtxsize = 0;
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int64_t mintxsize = MAX_BLOCK_SERIALIZED_SIZE;
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int64_t outputs = 0;
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int64_t swtotal_size = 0;
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int64_t swtotal_weight = 0;
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int64_t swtxs = 0;
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int64_t total_size = 0;
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int64_t total_weight = 0;
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int64_t utxo_size_inc = 0;
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std::vector<CAmount> fee_array;
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std::vector<CAmount> feerate_array;
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std::vector<int64_t> txsize_array;
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for (const auto& tx : block.vtx) {
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outputs += tx->vout.size();
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CAmount txfee = 0;
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CAmount tx_total_out = 0;
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if (loop_outputs) {
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for (const CTxOut& out : tx->vout) {
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utxo_size_inc += GetSerializeSize(out, SER_NETWORK, PROTOCOL_VERSION) + PER_UTXO_OVERHEAD;
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}
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}
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if (tx->IsCoinBase()) {
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continue;
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}
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if (loop_outputs) {
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for (const CTxOut& out : tx->vout) {
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if (out.IsFee() && out.nAsset.GetAsset() == asset) {
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txfee += out.nValue.GetAmount();
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}
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if (out.nValue.IsExplicit() && out.nAsset.IsExplicit() && out.nAsset.GetAsset() == asset) {
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tx_total_out += out.nValue.GetAmount();
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}
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}
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}
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inputs += tx->vin.size(); // Don't count coinbase's fake input
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total_out += tx_total_out; // Don't count coinbase reward
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int64_t tx_size = 0;
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if (do_calculate_size) {
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tx_size = tx->GetTotalSize();
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if (do_mediantxsize) {
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txsize_array.push_back(tx_size);
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}
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maxtxsize = std::max(maxtxsize, tx_size);
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mintxsize = std::min(mintxsize, tx_size);
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total_size += tx_size;
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}
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int64_t weight = 0;
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if (do_calculate_weight) {
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weight = GetTransactionWeight(*tx);
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total_weight += weight;
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}
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if (do_calculate_sw && tx->HasWitness()) {
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++swtxs;
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swtotal_size += tx_size;
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swtotal_weight += weight;
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}
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if (loop_inputs) {
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if (!fTxIndex) {
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throw JSONRPCError(RPC_INVALID_PARAMETER, "One or more of the selected stats requires -txindex enabled");
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}
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for (const CTxIn& in : tx->vin) {
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if (in.m_is_pegin) {
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continue;
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}
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CTransactionRef tx_in;
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uint256 hashBlock;
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if (!GetTransaction(in.prevout.hash, tx_in, Params().GetConsensus(), hashBlock, false)) {
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throw JSONRPCError(RPC_INTERNAL_ERROR, std::string("Unexpected internal error (tx index seems corrupt)"));
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}
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CTxOut prevoutput = tx_in->vout[in.prevout.n];
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utxo_size_inc -= GetSerializeSize(prevoutput, SER_NETWORK, PROTOCOL_VERSION) + PER_UTXO_OVERHEAD;
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}
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}
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if (loop_outputs) {
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assert(MoneyRange(txfee));
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if (do_medianfee) {
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fee_array.push_back(txfee);
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}
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maxfee = std::max(maxfee, txfee);
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minfee = std::min(minfee, txfee);
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totalfee += txfee;
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// New feerate uses satoshis per virtual byte instead of per serialized byte
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CAmount feerate = weight ? (txfee * WITNESS_SCALE_FACTOR) / weight : 0;
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if (do_medianfeerate) {
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feerate_array.push_back(feerate);
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}
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maxfeerate = std::max(maxfeerate, feerate);
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minfeerate = std::min(minfeerate, feerate);
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}
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}
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UniValue ret_all(UniValue::VOBJ);
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ret_all.pushKV("avgfee", (block.vtx.size() > 1) ? totalfee / (block.vtx.size() - 1) : 0);
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ret_all.pushKV("avgfeerate", total_weight ? (totalfee * WITNESS_SCALE_FACTOR) / total_weight : 0); // Unit: sat/vbyte
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ret_all.pushKV("avgtxsize", (block.vtx.size() > 1) ? total_size / (block.vtx.size() - 1) : 0);
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ret_all.pushKV("blockhash", pindex->GetBlockHash().GetHex());
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ret_all.pushKV("height", (int64_t)pindex->nHeight);
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ret_all.pushKV("ins", inputs);
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ret_all.pushKV("maxfee", maxfee);
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ret_all.pushKV("maxfeerate", maxfeerate);
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ret_all.pushKV("maxtxsize", maxtxsize);
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ret_all.pushKV("medianfee", CalculateTruncatedMedian(fee_array));
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ret_all.pushKV("medianfeerate", CalculateTruncatedMedian(feerate_array));
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ret_all.pushKV("mediantime", pindex->GetMedianTimePast());
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ret_all.pushKV("mediantxsize", CalculateTruncatedMedian(txsize_array));
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ret_all.pushKV("minfee", (minfee == MAX_MONEY) ? 0 : minfee);
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ret_all.pushKV("minfeerate", (minfeerate == MAX_MONEY) ? 0 : minfeerate);
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ret_all.pushKV("mintxsize", mintxsize == MAX_BLOCK_SERIALIZED_SIZE ? 0 : mintxsize);
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ret_all.pushKV("outs", outputs);
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ret_all.pushKV("subsidy", GetBlockSubsidy(pindex->nHeight, Params().GetConsensus()));
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ret_all.pushKV("swtotal_size", swtotal_size);
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ret_all.pushKV("swtotal_weight", swtotal_weight);
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ret_all.pushKV("swtxs", swtxs);
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ret_all.pushKV("time", pindex->GetBlockTime());
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ret_all.pushKV("total_out", total_out);
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ret_all.pushKV("total_size", total_size);
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ret_all.pushKV("total_weight", total_weight);
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ret_all.pushKV("totalfee", totalfee);
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ret_all.pushKV("txs", (int64_t)block.vtx.size());
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ret_all.pushKV("utxo_increase", outputs - inputs);
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ret_all.pushKV("utxo_size_inc", utxo_size_inc);
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if (do_all) {
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return ret_all;
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}
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UniValue ret(UniValue::VOBJ);
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for (const std::string& stat : stats) {
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const UniValue& value = ret_all[stat];
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if (value.isNull()) {
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid selected statistic %s", stat));
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}
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ret.pushKV(stat, value);
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}
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return ret;
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}
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static const CRPCCommand commands[] =
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{ // category name actor (function) okSafe argNames
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// --------------------- ------------------------ ----------------------- ------ ----------
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{ "blockchain", "getblockchaininfo", &getblockchaininfo, true, {} },
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{ "blockchain", "getblockstats", &getblockstats, true, {"hash_or_height", "stats"} },
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{ "blockchain", "getbestblockhash", &getbestblockhash, true, {} },
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{ "blockchain", "getblockcount", &getblockcount, true, {} },
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{ "blockchain", "getblock", &getblock, true, {"blockhash","verbosity"} },
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@ -117,6 +117,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
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{ "importmulti", 1, "options" },
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{ "verifychain", 0, "checklevel" },
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{ "verifychain", 1, "nblocks" },
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{ "getblockstats", 0, "hash_or_height" },
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{ "getblockstats", 1, "stats" },
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{ "pruneblockchain", 0, "height" },
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{ "keypoolrefill", 0, "newsize" },
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{ "getrawmempool", 0, "verbose" },
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