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blockchain.cpp
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blockchain.cpp
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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <rpc/blockchain.h>
#include <blockfilter.h>
#include <chain.h>
#include <chainparams.h>
#include <clientversion.h>
#include <coins.h>
#include <common/args.h>
#include <consensus/amount.h>
#include <consensus/params.h>
#include <consensus/validation.h>
#include <core_io.h>
#include <deploymentinfo.h>
#include <deploymentstatus.h>
#include <flatfile.h>
#include <hash.h>
#include <index/blockfilterindex.h>
#include <index/coinstatsindex.h>
#include <kernel/coinstats.h>
#include <logging/timer.h>
#include <net.h>
#include <net_processing.h>
#include <node/blockstorage.h>
#include <node/context.h>
#include <node/transaction.h>
#include <node/utxo_snapshot.h>
#include <primitives/transaction.h>
#include <rpc/server.h>
#include <rpc/server_util.h>
#include <rpc/util.h>
#include <script/descriptor.h>
#include <streams.h>
#include <sync.h>
#include <txdb.h>
#include <txmempool.h>
#include <undo.h>
#include <univalue.h>
#include <util/check.h>
#include <util/fs.h>
#include <util/strencodings.h>
#include <util/translation.h>
#include <validation.h>
#include <validationinterface.h>
#include <versionbits.h>
#include <stdint.h>
#include <condition_variable>
#include <memory>
#include <mutex>
using kernel::CCoinsStats;
using kernel::CoinStatsHashType;
using node::BlockManager;
using node::NodeContext;
using node::SnapshotMetadata;
struct CUpdatedBlock
{
uint256 hash;
int height;
};
static GlobalMutex cs_blockchange;
static std::condition_variable cond_blockchange;
static CUpdatedBlock latestblock GUARDED_BY(cs_blockchange);
/* Calculate the difficulty for a given block index.
*/
double GetDifficulty(const CBlockIndex& blockindex)
{
int nShift = (blockindex.nBits >> 24) & 0xff;
double dDiff =
(double)0x0000ffff / (double)(blockindex.nBits & 0x00ffffff);
while (nShift < 29)
{
dDiff *= 256.0;
nShift++;
}
while (nShift > 29)
{
dDiff /= 256.0;
nShift--;
}
return dDiff;
}
static int ComputeNextBlockAndDepth(const CBlockIndex& tip, const CBlockIndex& blockindex, const CBlockIndex*& next)
{
next = tip.GetAncestor(blockindex.nHeight + 1);
if (next && next->pprev == &blockindex) {
return tip.nHeight - blockindex.nHeight + 1;
}
next = nullptr;
return &blockindex == &tip ? 1 : -1;
}
static const CBlockIndex* ParseHashOrHeight(const UniValue& param, ChainstateManager& chainman)
{
LOCK(::cs_main);
CChain& active_chain = chainman.ActiveChain();
if (param.isNum()) {
const int height{param.getInt<int>()};
if (height < 0) {
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Target block height %d is negative", height));
}
const int current_tip{active_chain.Height()};
if (height > current_tip) {
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Target block height %d after current tip %d", height, current_tip));
}
return active_chain[height];
} else {
const uint256 hash{ParseHashV(param, "hash_or_height")};
const CBlockIndex* pindex = chainman.m_blockman.LookupBlockIndex(hash);
if (!pindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
}
return pindex;
}
}
UniValue blockheaderToJSON(const CBlockIndex& tip, const CBlockIndex& blockindex)
{
// Serialize passed information without accessing chain state of the active chain!
AssertLockNotHeld(cs_main); // For performance reasons
UniValue result(UniValue::VOBJ);
result.pushKV("hash", blockindex.GetBlockHash().GetHex());
const CBlockIndex* pnext;
int confirmations = ComputeNextBlockAndDepth(tip, blockindex, pnext);
result.pushKV("confirmations", confirmations);
result.pushKV("height", blockindex.nHeight);
result.pushKV("version", blockindex.nVersion);
result.pushKV("versionHex", strprintf("%08x", blockindex.nVersion));
result.pushKV("merkleroot", blockindex.hashMerkleRoot.GetHex());
result.pushKV("time", blockindex.nTime);
result.pushKV("mediantime", blockindex.GetMedianTimePast());
result.pushKV("nonce", blockindex.nNonce);
result.pushKV("bits", strprintf("%08x", blockindex.nBits));
result.pushKV("difficulty", GetDifficulty(blockindex));
result.pushKV("chainwork", blockindex.nChainWork.GetHex());
result.pushKV("nTx", blockindex.nTx);
if (blockindex.pprev)
result.pushKV("previousblockhash", blockindex.pprev->GetBlockHash().GetHex());
if (pnext)
result.pushKV("nextblockhash", pnext->GetBlockHash().GetHex());
return result;
}
UniValue blockToJSON(BlockManager& blockman, const CBlock& block, const CBlockIndex& tip, const CBlockIndex& blockindex, TxVerbosity verbosity)
{
UniValue result = blockheaderToJSON(tip, blockindex);
result.pushKV("strippedsize", (int)::GetSerializeSize(TX_NO_WITNESS(block)));
result.pushKV("size", (int)::GetSerializeSize(TX_WITH_WITNESS(block)));
result.pushKV("weight", (int)::GetBlockWeight(block));
UniValue txs(UniValue::VARR);
switch (verbosity) {
case TxVerbosity::SHOW_TXID:
for (const CTransactionRef& tx : block.vtx) {
txs.push_back(tx->GetHash().GetHex());
}
break;
case TxVerbosity::SHOW_DETAILS:
case TxVerbosity::SHOW_DETAILS_AND_PREVOUT:
CBlockUndo blockUndo;
const bool is_not_pruned{WITH_LOCK(::cs_main, return !blockman.IsBlockPruned(blockindex))};
const bool have_undo{is_not_pruned && blockman.UndoReadFromDisk(blockUndo, blockindex)};
for (size_t i = 0; i < block.vtx.size(); ++i) {
const CTransactionRef& tx = block.vtx.at(i);
// coinbase transaction (i.e. i == 0) doesn't have undo data
const CTxUndo* txundo = (have_undo && i > 0) ? &blockUndo.vtxundo.at(i - 1) : nullptr;
UniValue objTx(UniValue::VOBJ);
TxToUniv(*tx, /*block_hash=*/uint256(), /*entry=*/objTx, /*include_hex=*/true, txundo, verbosity);
txs.push_back(objTx);
}
break;
}
result.pushKV("tx", txs);
return result;
}
static RPCHelpMan getblockcount()
{
return RPCHelpMan{"getblockcount",
"\nReturns the height of the most-work fully-validated chain.\n"
"The genesis block has height 0.\n",
{},
RPCResult{
RPCResult::Type::NUM, "", "The current block count"},
RPCExamples{
HelpExampleCli("getblockcount", "")
+ HelpExampleRpc("getblockcount", "")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
LOCK(cs_main);
return chainman.ActiveChain().Height();
},
};
}
static RPCHelpMan getbestblockhash()
{
return RPCHelpMan{"getbestblockhash",
"\nReturns the hash of the best (tip) block in the most-work fully-validated chain.\n",
{},
RPCResult{
RPCResult::Type::STR_HEX, "", "the block hash, hex-encoded"},
RPCExamples{
HelpExampleCli("getbestblockhash", "")
+ HelpExampleRpc("getbestblockhash", "")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
LOCK(cs_main);
return chainman.ActiveChain().Tip()->GetBlockHash().GetHex();
},
};
}
void RPCNotifyBlockChange(const CBlockIndex* pindex)
{
if(pindex) {
LOCK(cs_blockchange);
latestblock.hash = pindex->GetBlockHash();
latestblock.height = pindex->nHeight;
}
cond_blockchange.notify_all();
}
static RPCHelpMan waitfornewblock()
{
return RPCHelpMan{"waitfornewblock",
"\nWaits for a specific new block and returns useful info about it.\n"
"\nReturns the current block on timeout or exit.\n",
{
{"timeout", RPCArg::Type::NUM, RPCArg::Default{0}, "Time in milliseconds to wait for a response. 0 indicates no timeout."},
},
RPCResult{
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR_HEX, "hash", "The blockhash"},
{RPCResult::Type::NUM, "height", "Block height"},
}},
RPCExamples{
HelpExampleCli("waitfornewblock", "1000")
+ HelpExampleRpc("waitfornewblock", "1000")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
int timeout = 0;
if (!request.params[0].isNull())
timeout = request.params[0].getInt<int>();
CUpdatedBlock block;
{
WAIT_LOCK(cs_blockchange, lock);
block = latestblock;
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&block]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.height != block.height || latestblock.hash != block.hash || !IsRPCRunning(); });
else
cond_blockchange.wait(lock, [&block]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.height != block.height || latestblock.hash != block.hash || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.pushKV("hash", block.hash.GetHex());
ret.pushKV("height", block.height);
return ret;
},
};
}
static RPCHelpMan waitforblock()
{
return RPCHelpMan{"waitforblock",
"\nWaits for a specific new block and returns useful info about it.\n"
"\nReturns the current block on timeout or exit.\n",
{
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "Block hash to wait for."},
{"timeout", RPCArg::Type::NUM, RPCArg::Default{0}, "Time in milliseconds to wait for a response. 0 indicates no timeout."},
},
RPCResult{
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR_HEX, "hash", "The blockhash"},
{RPCResult::Type::NUM, "height", "Block height"},
}},
RPCExamples{
HelpExampleCli("waitforblock", "\"0000000000079f8ef3d2c688c244eb7a4570b24c9ed7b4a8c619eb02596f8862\" 1000")
+ HelpExampleRpc("waitforblock", "\"0000000000079f8ef3d2c688c244eb7a4570b24c9ed7b4a8c619eb02596f8862\", 1000")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
int timeout = 0;
uint256 hash(ParseHashV(request.params[0], "blockhash"));
if (!request.params[1].isNull())
timeout = request.params[1].getInt<int>();
CUpdatedBlock block;
{
WAIT_LOCK(cs_blockchange, lock);
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&hash]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.hash == hash || !IsRPCRunning();});
else
cond_blockchange.wait(lock, [&hash]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.hash == hash || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.pushKV("hash", block.hash.GetHex());
ret.pushKV("height", block.height);
return ret;
},
};
}
static RPCHelpMan waitforblockheight()
{
return RPCHelpMan{"waitforblockheight",
"\nWaits for (at least) block height and returns the height and hash\n"
"of the current tip.\n"
"\nReturns the current block on timeout or exit.\n",
{
{"height", RPCArg::Type::NUM, RPCArg::Optional::NO, "Block height to wait for."},
{"timeout", RPCArg::Type::NUM, RPCArg::Default{0}, "Time in milliseconds to wait for a response. 0 indicates no timeout."},
},
RPCResult{
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR_HEX, "hash", "The blockhash"},
{RPCResult::Type::NUM, "height", "Block height"},
}},
RPCExamples{
HelpExampleCli("waitforblockheight", "100 1000")
+ HelpExampleRpc("waitforblockheight", "100, 1000")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
int timeout = 0;
int height = request.params[0].getInt<int>();
if (!request.params[1].isNull())
timeout = request.params[1].getInt<int>();
CUpdatedBlock block;
{
WAIT_LOCK(cs_blockchange, lock);
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&height]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.height >= height || !IsRPCRunning();});
else
cond_blockchange.wait(lock, [&height]() EXCLUSIVE_LOCKS_REQUIRED(cs_blockchange) {return latestblock.height >= height || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.pushKV("hash", block.hash.GetHex());
ret.pushKV("height", block.height);
return ret;
},
};
}
static RPCHelpMan syncwithvalidationinterfacequeue()
{
return RPCHelpMan{"syncwithvalidationinterfacequeue",
"\nWaits for the validation interface queue to catch up on everything that was there when we entered this function.\n",
{},
RPCResult{RPCResult::Type::NONE, "", ""},
RPCExamples{
HelpExampleCli("syncwithvalidationinterfacequeue","")
+ HelpExampleRpc("syncwithvalidationinterfacequeue","")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
NodeContext& node = EnsureAnyNodeContext(request.context);
CHECK_NONFATAL(node.validation_signals)->SyncWithValidationInterfaceQueue();
return UniValue::VNULL;
},
};
}
static RPCHelpMan getdifficulty()
{
return RPCHelpMan{"getdifficulty",
"\nReturns the proof-of-work difficulty as a multiple of the minimum difficulty.\n",
{},
RPCResult{
RPCResult::Type::NUM, "", "the proof-of-work difficulty as a multiple of the minimum difficulty."},
RPCExamples{
HelpExampleCli("getdifficulty", "")
+ HelpExampleRpc("getdifficulty", "")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
LOCK(cs_main);
return GetDifficulty(*CHECK_NONFATAL(chainman.ActiveChain().Tip()));
},
};
}
static RPCHelpMan getblockfrompeer()
{
return RPCHelpMan{
"getblockfrompeer",
"Attempt to fetch block from a given peer.\n\n"
"We must have the header for this block, e.g. using submitheader.\n"
"Subsequent calls for the same block may cause the response from the previous peer to be ignored.\n"
"Peers generally ignore requests for a stale block that they never fully verified, or one that is more than a month old.\n"
"When a peer does not respond with a block, we will disconnect.\n"
"Note: The block could be re-pruned as soon as it is received.\n\n"
"Returns an empty JSON object if the request was successfully scheduled.",
{
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The block hash to try to fetch"},
{"peer_id", RPCArg::Type::NUM, RPCArg::Optional::NO, "The peer to fetch it from (see getpeerinfo for peer IDs)"},
},
RPCResult{RPCResult::Type::OBJ, "", /*optional=*/false, "", {}},
RPCExamples{
HelpExampleCli("getblockfrompeer", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\" 0")
+ HelpExampleRpc("getblockfrompeer", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\" 0")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
const NodeContext& node = EnsureAnyNodeContext(request.context);
ChainstateManager& chainman = EnsureChainman(node);
PeerManager& peerman = EnsurePeerman(node);
const uint256& block_hash{ParseHashV(request.params[0], "blockhash")};
const NodeId peer_id{request.params[1].getInt<int64_t>()};
const CBlockIndex* const index = WITH_LOCK(cs_main, return chainman.m_blockman.LookupBlockIndex(block_hash););
if (!index) {
throw JSONRPCError(RPC_MISC_ERROR, "Block header missing");
}
// Fetching blocks before the node has syncing past their height can prevent block files from
// being pruned, so we avoid it if the node is in prune mode.
if (chainman.m_blockman.IsPruneMode() && index->nHeight > WITH_LOCK(chainman.GetMutex(), return chainman.ActiveTip()->nHeight)) {
throw JSONRPCError(RPC_MISC_ERROR, "In prune mode, only blocks that the node has already synced previously can be fetched from a peer");
}
const bool block_has_data = WITH_LOCK(::cs_main, return index->nStatus & BLOCK_HAVE_DATA);
if (block_has_data) {
throw JSONRPCError(RPC_MISC_ERROR, "Block already downloaded");
}
if (const auto err{peerman.FetchBlock(peer_id, *index)}) {
throw JSONRPCError(RPC_MISC_ERROR, err.value());
}
return UniValue::VOBJ;
},
};
}
static RPCHelpMan getblockhash()
{
return RPCHelpMan{"getblockhash",
"\nReturns hash of block in best-block-chain at height provided.\n",
{
{"height", RPCArg::Type::NUM, RPCArg::Optional::NO, "The height index"},
},
RPCResult{
RPCResult::Type::STR_HEX, "", "The block hash"},
RPCExamples{
HelpExampleCli("getblockhash", "1000")
+ HelpExampleRpc("getblockhash", "1000")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
LOCK(cs_main);
const CChain& active_chain = chainman.ActiveChain();
int nHeight = request.params[0].getInt<int>();
if (nHeight < 0 || nHeight > active_chain.Height())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Block height out of range");
const CBlockIndex* pblockindex = active_chain[nHeight];
return pblockindex->GetBlockHash().GetHex();
},
};
}
static RPCHelpMan getblockheader()
{
return RPCHelpMan{"getblockheader",
"\nIf verbose is false, returns a string that is serialized, hex-encoded data for blockheader 'hash'.\n"
"If verbose is true, returns an Object with information about blockheader <hash>.\n",
{
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The block hash"},
{"verbose", RPCArg::Type::BOOL, RPCArg::Default{true}, "true for a json object, false for the hex-encoded data"},
},
{
RPCResult{"for verbose = true",
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR_HEX, "hash", "the block hash (same as provided)"},
{RPCResult::Type::NUM, "confirmations", "The number of confirmations, or -1 if the block is not on the main chain"},
{RPCResult::Type::NUM, "height", "The block height or index"},
{RPCResult::Type::NUM, "version", "The block version"},
{RPCResult::Type::STR_HEX, "versionHex", "The block version formatted in hexadecimal"},
{RPCResult::Type::STR_HEX, "merkleroot", "The merkle root"},
{RPCResult::Type::NUM_TIME, "time", "The block time expressed in " + UNIX_EPOCH_TIME},
{RPCResult::Type::NUM_TIME, "mediantime", "The median block time expressed in " + UNIX_EPOCH_TIME},
{RPCResult::Type::NUM, "nonce", "The nonce"},
{RPCResult::Type::STR_HEX, "bits", "The bits"},
{RPCResult::Type::NUM, "difficulty", "The difficulty"},
{RPCResult::Type::STR_HEX, "chainwork", "Expected number of hashes required to produce the current chain"},
{RPCResult::Type::NUM, "nTx", "The number of transactions in the block"},
{RPCResult::Type::STR_HEX, "previousblockhash", /*optional=*/true, "The hash of the previous block (if available)"},
{RPCResult::Type::STR_HEX, "nextblockhash", /*optional=*/true, "The hash of the next block (if available)"},
}},
RPCResult{"for verbose=false",
RPCResult::Type::STR_HEX, "", "A string that is serialized, hex-encoded data for block 'hash'"},
},
RPCExamples{
HelpExampleCli("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
+ HelpExampleRpc("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
uint256 hash(ParseHashV(request.params[0], "hash"));
bool fVerbose = true;
if (!request.params[1].isNull())
fVerbose = request.params[1].get_bool();
const CBlockIndex* pblockindex;
const CBlockIndex* tip;
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
LOCK(cs_main);
pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
tip = chainman.ActiveChain().Tip();
}
if (!pblockindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
}
if (!fVerbose)
{
DataStream ssBlock{};
ssBlock << pblockindex->GetBlockHeader();
std::string strHex = HexStr(ssBlock);
return strHex;
}
return blockheaderToJSON(*tip, *pblockindex);
},
};
}
static CBlock GetBlockChecked(BlockManager& blockman, const CBlockIndex& blockindex)
{
CBlock block;
{
LOCK(cs_main);
if (blockman.IsBlockPruned(blockindex)) {
throw JSONRPCError(RPC_MISC_ERROR, "Block not available (pruned data)");
}
}
if (!blockman.ReadBlockFromDisk(block, blockindex)) {
// Block not found on disk. This could be because we have the block
// header in our index but not yet have the block or did not accept the
// block. Or if the block was pruned right after we released the lock above.
throw JSONRPCError(RPC_MISC_ERROR, "Block not found on disk");
}
return block;
}
static std::vector<uint8_t> GetRawBlockChecked(BlockManager& blockman, const CBlockIndex& blockindex)
{
std::vector<uint8_t> data{};
FlatFilePos pos{};
{
LOCK(cs_main);
if (blockman.IsBlockPruned(blockindex)) {
throw JSONRPCError(RPC_MISC_ERROR, "Block not available (pruned data)");
}
pos = blockindex.GetBlockPos();
}
if (!blockman.ReadRawBlockFromDisk(data, pos)) {
// Block not found on disk. This could be because we have the block
// header in our index but not yet have the block or did not accept the
// block. Or if the block was pruned right after we released the lock above.
throw JSONRPCError(RPC_MISC_ERROR, "Block not found on disk");
}
return data;
}
static CBlockUndo GetUndoChecked(BlockManager& blockman, const CBlockIndex& blockindex)
{
CBlockUndo blockUndo;
// The Genesis block does not have undo data
if (blockindex.nHeight == 0) return blockUndo;
{
LOCK(cs_main);
if (blockman.IsBlockPruned(blockindex)) {
throw JSONRPCError(RPC_MISC_ERROR, "Undo data not available (pruned data)");
}
}
if (!blockman.UndoReadFromDisk(blockUndo, blockindex)) {
throw JSONRPCError(RPC_MISC_ERROR, "Can't read undo data from disk");
}
return blockUndo;
}
const RPCResult getblock_vin{
RPCResult::Type::ARR, "vin", "",
{
{RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::ELISION, "", "The same output as verbosity = 2"},
{RPCResult::Type::OBJ, "prevout", "(Only if undo information is available)",
{
{RPCResult::Type::BOOL, "generated", "Coinbase or not"},
{RPCResult::Type::NUM, "height", "The height of the prevout"},
{RPCResult::Type::STR_AMOUNT, "value", "The value in " + CURRENCY_UNIT},
{RPCResult::Type::OBJ, "scriptPubKey", "",
{
{RPCResult::Type::STR, "asm", "Disassembly of the public key script"},
{RPCResult::Type::STR, "desc", "Inferred descriptor for the output"},
{RPCResult::Type::STR_HEX, "hex", "The raw public key script bytes, hex-encoded"},
{RPCResult::Type::STR, "address", /*optional=*/true, "The Bitcoin address (only if a well-defined address exists)"},
{RPCResult::Type::STR, "type", "The type (one of: " + GetAllOutputTypes() + ")"},
}},
}},
}},
}
};
static RPCHelpMan getblock()
{
return RPCHelpMan{"getblock",
"\nIf verbosity is 0, returns a string that is serialized, hex-encoded data for block 'hash'.\n"
"If verbosity is 1, returns an Object with information about block <hash>.\n"
"If verbosity is 2, returns an Object with information about block <hash> and information about each transaction.\n"
"If verbosity is 3, returns an Object with information about block <hash> and information about each transaction, including prevout information for inputs (only for unpruned blocks in the current best chain).\n",
{
{"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The block hash"},
{"verbosity|verbose", RPCArg::Type::NUM, RPCArg::Default{1}, "0 for hex-encoded data, 1 for a JSON object, 2 for JSON object with transaction data, and 3 for JSON object with transaction data including prevout information for inputs",
RPCArgOptions{.skip_type_check = true}},
},
{
RPCResult{"for verbosity = 0",
RPCResult::Type::STR_HEX, "", "A string that is serialized, hex-encoded data for block 'hash'"},
RPCResult{"for verbosity = 1",
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::STR_HEX, "hash", "the block hash (same as provided)"},
{RPCResult::Type::NUM, "confirmations", "The number of confirmations, or -1 if the block is not on the main chain"},
{RPCResult::Type::NUM, "size", "The block size"},
{RPCResult::Type::NUM, "strippedsize", "The block size excluding witness data"},
{RPCResult::Type::NUM, "weight", "The block weight as defined in BIP 141"},
{RPCResult::Type::NUM, "height", "The block height or index"},
{RPCResult::Type::NUM, "version", "The block version"},
{RPCResult::Type::STR_HEX, "versionHex", "The block version formatted in hexadecimal"},
{RPCResult::Type::STR_HEX, "merkleroot", "The merkle root"},
{RPCResult::Type::ARR, "tx", "The transaction ids",
{{RPCResult::Type::STR_HEX, "", "The transaction id"}}},
{RPCResult::Type::NUM_TIME, "time", "The block time expressed in " + UNIX_EPOCH_TIME},
{RPCResult::Type::NUM_TIME, "mediantime", "The median block time expressed in " + UNIX_EPOCH_TIME},
{RPCResult::Type::NUM, "nonce", "The nonce"},
{RPCResult::Type::STR_HEX, "bits", "The bits"},
{RPCResult::Type::NUM, "difficulty", "The difficulty"},
{RPCResult::Type::STR_HEX, "chainwork", "Expected number of hashes required to produce the chain up to this block (in hex)"},
{RPCResult::Type::NUM, "nTx", "The number of transactions in the block"},
{RPCResult::Type::STR_HEX, "previousblockhash", /*optional=*/true, "The hash of the previous block (if available)"},
{RPCResult::Type::STR_HEX, "nextblockhash", /*optional=*/true, "The hash of the next block (if available)"},
}},
RPCResult{"for verbosity = 2",
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::ELISION, "", "Same output as verbosity = 1"},
{RPCResult::Type::ARR, "tx", "",
{
{RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::ELISION, "", "The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 \"tx\" result"},
{RPCResult::Type::NUM, "fee", "The transaction fee in " + CURRENCY_UNIT + ", omitted if block undo data is not available"},
}},
}},
}},
RPCResult{"for verbosity = 3",
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::ELISION, "", "Same output as verbosity = 2"},
{RPCResult::Type::ARR, "tx", "",
{
{RPCResult::Type::OBJ, "", "",
{
getblock_vin,
}},
}},
}},
},
RPCExamples{
HelpExampleCli("getblock", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
+ HelpExampleRpc("getblock", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
uint256 hash(ParseHashV(request.params[0], "blockhash"));
int verbosity = 1;
if (!request.params[1].isNull()) {
if (request.params[1].isBool()) {
verbosity = request.params[1].get_bool() ? 1 : 0;
} else {
verbosity = request.params[1].getInt<int>();
}
}
const CBlockIndex* pblockindex;
const CBlockIndex* tip;
ChainstateManager& chainman = EnsureAnyChainman(request.context);
{
LOCK(cs_main);
pblockindex = chainman.m_blockman.LookupBlockIndex(hash);
tip = chainman.ActiveChain().Tip();
if (!pblockindex) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
}
}
const std::vector<uint8_t> block_data{GetRawBlockChecked(chainman.m_blockman, *pblockindex)};
if (verbosity <= 0) {
return HexStr(block_data);
}
DataStream block_stream{block_data};
CBlock block{};
block_stream >> TX_WITH_WITNESS(block);
TxVerbosity tx_verbosity;
if (verbosity == 1) {
tx_verbosity = TxVerbosity::SHOW_TXID;
} else if (verbosity == 2) {
tx_verbosity = TxVerbosity::SHOW_DETAILS;
} else {
tx_verbosity = TxVerbosity::SHOW_DETAILS_AND_PREVOUT;
}
return blockToJSON(chainman.m_blockman, block, *tip, *pblockindex, tx_verbosity);
},
};
}
static RPCHelpMan pruneblockchain()
{
return RPCHelpMan{"pruneblockchain", "",
{
{"height", RPCArg::Type::NUM, RPCArg::Optional::NO, "The block height to prune up to. May be set to a discrete height, or to a " + UNIX_EPOCH_TIME + "\n"
" to prune blocks whose block time is at least 2 hours older than the provided timestamp."},
},
RPCResult{
RPCResult::Type::NUM, "", "Height of the last block pruned"},
RPCExamples{
HelpExampleCli("pruneblockchain", "1000")
+ HelpExampleRpc("pruneblockchain", "1000")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
ChainstateManager& chainman = EnsureAnyChainman(request.context);
if (!chainman.m_blockman.IsPruneMode()) {
throw JSONRPCError(RPC_MISC_ERROR, "Cannot prune blocks because node is not in prune mode.");
}
LOCK(cs_main);
Chainstate& active_chainstate = chainman.ActiveChainstate();
CChain& active_chain = active_chainstate.m_chain;
int heightParam = request.params[0].getInt<int>();
if (heightParam < 0) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Negative block height.");
}
// Height value more than a billion is too high to be a block height, and
// too low to be a block time (corresponds to timestamp from Sep 2001).
if (heightParam > 1000000000) {
// Add a 2 hour buffer to include blocks which might have had old timestamps
const CBlockIndex* pindex = active_chain.FindEarliestAtLeast(heightParam - TIMESTAMP_WINDOW, 0);
if (!pindex) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Could not find block with at least the specified timestamp.");
}
heightParam = pindex->nHeight;
}
unsigned int height = (unsigned int) heightParam;
unsigned int chainHeight = (unsigned int) active_chain.Height();
if (chainHeight < chainman.GetParams().PruneAfterHeight()) {
throw JSONRPCError(RPC_MISC_ERROR, "Blockchain is too short for pruning.");
} else if (height > chainHeight) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Blockchain is shorter than the attempted prune height.");
} else if (height > chainHeight - MIN_BLOCKS_TO_KEEP) {
LogPrint(BCLog::RPC, "Attempt to prune blocks close to the tip. Retaining the minimum number of blocks.\n");
height = chainHeight - MIN_BLOCKS_TO_KEEP;
}
PruneBlockFilesManual(active_chainstate, height);
const CBlockIndex& block{*CHECK_NONFATAL(active_chain.Tip())};
return block.nStatus & BLOCK_HAVE_DATA ? active_chainstate.m_blockman.GetFirstStoredBlock(block)->nHeight - 1 : block.nHeight;
},
};
}
CoinStatsHashType ParseHashType(const std::string& hash_type_input)
{
if (hash_type_input == "hash_serialized_3") {
return CoinStatsHashType::HASH_SERIALIZED;
} else if (hash_type_input == "muhash") {
return CoinStatsHashType::MUHASH;
} else if (hash_type_input == "none") {
return CoinStatsHashType::NONE;
} else {
throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("'%s' is not a valid hash_type", hash_type_input));
}
}
/**
* Calculate statistics about the unspent transaction output set
*
* @param[in] index_requested Signals if the coinstatsindex should be used (when available).
*/
static std::optional<kernel::CCoinsStats> GetUTXOStats(CCoinsView* view, node::BlockManager& blockman,
kernel::CoinStatsHashType hash_type,
const std::function<void()>& interruption_point = {},
const CBlockIndex* pindex = nullptr,
bool index_requested = true)
{
// Use CoinStatsIndex if it is requested and available and a hash_type of Muhash or None was requested
if ((hash_type == kernel::CoinStatsHashType::MUHASH || hash_type == kernel::CoinStatsHashType::NONE) && g_coin_stats_index && index_requested) {
if (pindex) {
return g_coin_stats_index->LookUpStats(*pindex);
} else {
CBlockIndex& block_index = *CHECK_NONFATAL(WITH_LOCK(::cs_main, return blockman.LookupBlockIndex(view->GetBestBlock())));
return g_coin_stats_index->LookUpStats(block_index);
}
}
// If the coinstats index isn't requested or is otherwise not usable, the
// pindex should either be null or equal to the view's best block. This is
// because without the coinstats index we can only get coinstats about the
// best block.
CHECK_NONFATAL(!pindex || pindex->GetBlockHash() == view->GetBestBlock());
return kernel::ComputeUTXOStats(hash_type, view, blockman, interruption_point);
}
static RPCHelpMan gettxoutsetinfo()
{
return RPCHelpMan{"gettxoutsetinfo",
"\nReturns statistics about the unspent transaction output set.\n"
"Note this call may take some time if you are not using coinstatsindex.\n",
{
{"hash_type", RPCArg::Type::STR, RPCArg::Default{"hash_serialized_3"}, "Which UTXO set hash should be calculated. Options: 'hash_serialized_3' (the legacy algorithm), 'muhash', 'none'."},
{"hash_or_height", RPCArg::Type::NUM, RPCArg::DefaultHint{"the current best block"}, "The block hash or height of the target height (only available with coinstatsindex).",
RPCArgOptions{
.skip_type_check = true,
.type_str = {"", "string or numeric"},
}},
{"use_index", RPCArg::Type::BOOL, RPCArg::Default{true}, "Use coinstatsindex, if available."},
},
RPCResult{
RPCResult::Type::OBJ, "", "",
{
{RPCResult::Type::NUM, "height", "The block height (index) of the returned statistics"},
{RPCResult::Type::STR_HEX, "bestblock", "The hash of the block at which these statistics are calculated"},
{RPCResult::Type::NUM, "txouts", "The number of unspent transaction outputs"},
{RPCResult::Type::NUM, "bogosize", "Database-independent, meaningless metric indicating the UTXO set size"},
{RPCResult::Type::STR_HEX, "hash_serialized_3", /*optional=*/true, "The serialized hash (only present if 'hash_serialized_3' hash_type is chosen)"},
{RPCResult::Type::STR_HEX, "muhash", /*optional=*/true, "The serialized hash (only present if 'muhash' hash_type is chosen)"},
{RPCResult::Type::NUM, "transactions", /*optional=*/true, "The number of transactions with unspent outputs (not available when coinstatsindex is used)"},
{RPCResult::Type::NUM, "disk_size", /*optional=*/true, "The estimated size of the chainstate on disk (not available when coinstatsindex is used)"},
{RPCResult::Type::STR_AMOUNT, "total_amount", "The total amount of coins in the UTXO set"},
{RPCResult::Type::STR_AMOUNT, "total_unspendable_amount", /*optional=*/true, "The total amount of coins permanently excluded from the UTXO set (only available if coinstatsindex is used)"},
{RPCResult::Type::OBJ, "block_info", /*optional=*/true, "Info on amounts in the block at this block height (only available if coinstatsindex is used)",
{
{RPCResult::Type::STR_AMOUNT, "prevout_spent", "Total amount of all prevouts spent in this block"},
{RPCResult::Type::STR_AMOUNT, "coinbase", "Coinbase subsidy amount of this block"},
{RPCResult::Type::STR_AMOUNT, "new_outputs_ex_coinbase", "Total amount of new outputs created by this block"},
{RPCResult::Type::STR_AMOUNT, "unspendable", "Total amount of unspendable outputs created in this block"},
{RPCResult::Type::OBJ, "unspendables", "Detailed view of the unspendable categories",
{
{RPCResult::Type::STR_AMOUNT, "genesis_block", "The unspendable amount of the Genesis block subsidy"},
{RPCResult::Type::STR_AMOUNT, "bip30", "Transactions overridden by duplicates (no longer possible with BIP30)"},
{RPCResult::Type::STR_AMOUNT, "scripts", "Amounts sent to scripts that are unspendable (for example OP_RETURN outputs)"},
{RPCResult::Type::STR_AMOUNT, "unclaimed_rewards", "Fee rewards that miners did not claim in their coinbase transaction"},
}}
}},
}},
RPCExamples{
HelpExampleCli("gettxoutsetinfo", "") +
HelpExampleCli("gettxoutsetinfo", R"("none")") +
HelpExampleCli("gettxoutsetinfo", R"("none" 1000)") +
HelpExampleCli("gettxoutsetinfo", R"("none" '"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"')") +
HelpExampleCli("-named gettxoutsetinfo", R"(hash_type='muhash' use_index='false')") +
HelpExampleRpc("gettxoutsetinfo", "") +
HelpExampleRpc("gettxoutsetinfo", R"("none")") +
HelpExampleRpc("gettxoutsetinfo", R"("none", 1000)") +
HelpExampleRpc("gettxoutsetinfo", R"("none", "00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09")")
},
[&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
UniValue ret(UniValue::VOBJ);
const CBlockIndex* pindex{nullptr};
const CoinStatsHashType hash_type{request.params[0].isNull() ? CoinStatsHashType::HASH_SERIALIZED : ParseHashType(request.params[0].get_str())};
bool index_requested = request.params[2].isNull() || request.params[2].get_bool();
NodeContext& node = EnsureAnyNodeContext(request.context);
ChainstateManager& chainman = EnsureChainman(node);
Chainstate& active_chainstate = chainman.ActiveChainstate();
active_chainstate.ForceFlushStateToDisk();
CCoinsView* coins_view;
BlockManager* blockman;
{
LOCK(::cs_main);
coins_view = &active_chainstate.CoinsDB();
blockman = &active_chainstate.m_blockman;
pindex = blockman->LookupBlockIndex(coins_view->GetBestBlock());
}
if (!request.params[1].isNull()) {
if (!g_coin_stats_index) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Querying specific block heights requires coinstatsindex");
}
if (hash_type == CoinStatsHashType::HASH_SERIALIZED) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "hash_serialized_3 hash type cannot be queried for a specific block");
}
if (!index_requested) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot set use_index to false when querying for a specific block");
}
pindex = ParseHashOrHeight(request.params[1], chainman);
}
if (index_requested && g_coin_stats_index) {
if (!g_coin_stats_index->BlockUntilSyncedToCurrentChain()) {
const IndexSummary summary{g_coin_stats_index->GetSummary()};
// If a specific block was requested and the index has already synced past that height, we can return the
// data already even though the index is not fully synced yet.
if (pindex->nHeight > summary.best_block_height) {
throw JSONRPCError(RPC_INTERNAL_ERROR, strprintf("Unable to get data because coinstatsindex is still syncing. Current height: %d", summary.best_block_height));
}
}
}
const std::optional<CCoinsStats> maybe_stats = GetUTXOStats(coins_view, *blockman, hash_type, node.rpc_interruption_point, pindex, index_requested);
if (maybe_stats.has_value()) {
const CCoinsStats& stats = maybe_stats.value();
ret.pushKV("height", (int64_t)stats.nHeight);
ret.pushKV("bestblock", stats.hashBlock.GetHex());
ret.pushKV("txouts", (int64_t)stats.nTransactionOutputs);
ret.pushKV("bogosize", (int64_t)stats.nBogoSize);
if (hash_type == CoinStatsHashType::HASH_SERIALIZED) {
ret.pushKV("hash_serialized_3", stats.hashSerialized.GetHex());
}
if (hash_type == CoinStatsHashType::MUHASH) {
ret.pushKV("muhash", stats.hashSerialized.GetHex());
}
CHECK_NONFATAL(stats.total_amount.has_value());