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blockchain.cpp
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blockchain.cpp
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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 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 "amount.h"
#include "chain.h"
#include "chainparams.h"
#include "checkpoints.h"
#include "coins.h"
#include "consensus/validation.h"
#include "validation.h"
#include "core_io.h"
#include "policy/feerate.h"
#include "policy/policy.h"
#include "primitives/transaction.h"
#include "rpc/server.h"
#include "streams.h"
#include "sync.h"
#include "txdb.h"
#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
#include <mutex>
#include <condition_variable>
struct CUpdatedBlock
{
uint256 hash;
int height;
};
static std::mutex cs_blockchange;
static std::condition_variable cond_blockchange;
static CUpdatedBlock latestblock;
extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
double GetDifficulty(const CBlockIndex* blockindex)
{
if (blockindex == nullptr)
{
if (chainActive.Tip() == nullptr)
return 1.0;
else
blockindex = chainActive.Tip();
}
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;
}
UniValue blockheaderToJSON(const CBlockIndex* blockindex)
{
UniValue result(UniValue::VOBJ);
result.push_back(Pair("hash", blockindex->GetBlockHash().GetHex()));
int confirmations = -1;
// Only report confirmations if the block is on the main chain
if (chainActive.Contains(blockindex))
confirmations = chainActive.Height() - blockindex->nHeight + 1;
result.push_back(Pair("confirmations", confirmations));
result.push_back(Pair("height", blockindex->nHeight));
result.push_back(Pair("version", blockindex->nVersion));
result.push_back(Pair("versionHex", strprintf("%08x", blockindex->nVersion)));
result.push_back(Pair("merkleroot", blockindex->hashMerkleRoot.GetHex()));
result.push_back(Pair("time", (int64_t)blockindex->nTime));
result.push_back(Pair("mediantime", (int64_t)blockindex->GetMedianTimePast()));
result.push_back(Pair("nonce", (uint64_t)blockindex->nNonce));
result.push_back(Pair("bits", strprintf("%08x", blockindex->nBits)));
result.push_back(Pair("difficulty", GetDifficulty(blockindex)));
result.push_back(Pair("chainwork", blockindex->nChainWork.GetHex()));
if (blockindex->pprev)
result.push_back(Pair("previousblockhash", blockindex->pprev->GetBlockHash().GetHex()));
CBlockIndex *pnext = chainActive.Next(blockindex);
if (pnext)
result.push_back(Pair("nextblockhash", pnext->GetBlockHash().GetHex()));
return result;
}
UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDetails)
{
UniValue result(UniValue::VOBJ);
result.push_back(Pair("hash", blockindex->GetBlockHash().GetHex()));
int confirmations = -1;
// Only report confirmations if the block is on the main chain
if (chainActive.Contains(blockindex))
confirmations = chainActive.Height() - blockindex->nHeight + 1;
result.push_back(Pair("confirmations", confirmations));
result.push_back(Pair("strippedsize", (int)::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS)));
result.push_back(Pair("size", (int)::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION)));
result.push_back(Pair("weight", (int)::GetBlockWeight(block)));
result.push_back(Pair("height", blockindex->nHeight));
result.push_back(Pair("version", block.nVersion));
result.push_back(Pair("versionHex", strprintf("%08x", block.nVersion)));
result.push_back(Pair("merkleroot", block.hashMerkleRoot.GetHex()));
UniValue txs(UniValue::VARR);
for(const auto& tx : block.vtx)
{
if(txDetails)
{
UniValue objTx(UniValue::VOBJ);
TxToUniv(*tx, uint256(), objTx, true, RPCSerializationFlags());
txs.push_back(objTx);
}
else
txs.push_back(tx->GetHash().GetHex());
}
result.push_back(Pair("tx", txs));
result.push_back(Pair("time", block.GetBlockTime()));
result.push_back(Pair("mediantime", (int64_t)blockindex->GetMedianTimePast()));
result.push_back(Pair("nonce", (uint64_t)block.nNonce));
result.push_back(Pair("bits", strprintf("%08x", block.nBits)));
result.push_back(Pair("difficulty", GetDifficulty(blockindex)));
result.push_back(Pair("chainwork", blockindex->nChainWork.GetHex()));
if (blockindex->pprev)
result.push_back(Pair("previousblockhash", blockindex->pprev->GetBlockHash().GetHex()));
CBlockIndex *pnext = chainActive.Next(blockindex);
if (pnext)
result.push_back(Pair("nextblockhash", pnext->GetBlockHash().GetHex()));
return result;
}
UniValue getblockcount(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 0)
throw std::runtime_error(
"getblockcount\n"
"\nReturns the number of blocks in the longest blockchain.\n"
"\nResult:\n"
"n (numeric) The current block count\n"
"\nExamples:\n"
+ HelpExampleCli("getblockcount", "")
+ HelpExampleRpc("getblockcount", "")
);
LOCK(cs_main);
return chainActive.Height();
}
UniValue getbestblockhash(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 0)
throw std::runtime_error(
"getbestblockhash\n"
"\nReturns the hash of the best (tip) block in the longest blockchain.\n"
"\nResult:\n"
"\"hex\" (string) the block hash hex encoded\n"
"\nExamples:\n"
+ HelpExampleCli("getbestblockhash", "")
+ HelpExampleRpc("getbestblockhash", "")
);
LOCK(cs_main);
return chainActive.Tip()->GetBlockHash().GetHex();
}
void RPCNotifyBlockChange(bool ibd, const CBlockIndex * pindex)
{
if(pindex) {
std::lock_guard<std::mutex> lock(cs_blockchange);
latestblock.hash = pindex->GetBlockHash();
latestblock.height = pindex->nHeight;
}
cond_blockchange.notify_all();
}
UniValue waitfornewblock(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() > 1)
throw std::runtime_error(
"waitfornewblock (timeout)\n"
"\nWaits for a specific new block and returns useful info about it.\n"
"\nReturns the current block on timeout or exit.\n"
"\nArguments:\n"
"1. timeout (int, optional, default=0) Time in milliseconds to wait for a response. 0 indicates no timeout.\n"
"\nResult:\n"
"{ (json object)\n"
" \"hash\" : { (string) The blockhash\n"
" \"height\" : { (int) Block height\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("waitfornewblock", "1000")
+ HelpExampleRpc("waitfornewblock", "1000")
);
int timeout = 0;
if (!request.params[0].isNull())
timeout = request.params[0].get_int();
CUpdatedBlock block;
{
std::unique_lock<std::mutex> lock(cs_blockchange);
block = latestblock;
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&block]{return latestblock.height != block.height || latestblock.hash != block.hash || !IsRPCRunning(); });
else
cond_blockchange.wait(lock, [&block]{return latestblock.height != block.height || latestblock.hash != block.hash || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.push_back(Pair("hash", block.hash.GetHex()));
ret.push_back(Pair("height", block.height));
return ret;
}
UniValue waitforblock(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
"waitforblock <blockhash> (timeout)\n"
"\nWaits for a specific new block and returns useful info about it.\n"
"\nReturns the current block on timeout or exit.\n"
"\nArguments:\n"
"1. \"blockhash\" (required, string) Block hash to wait for.\n"
"2. timeout (int, optional, default=0) Time in milliseconds to wait for a response. 0 indicates no timeout.\n"
"\nResult:\n"
"{ (json object)\n"
" \"hash\" : { (string) The blockhash\n"
" \"height\" : { (int) Block height\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("waitforblock", "\"0000000000079f8ef3d2c688c244eb7a4570b24c9ed7b4a8c619eb02596f8862\", 1000")
+ HelpExampleRpc("waitforblock", "\"0000000000079f8ef3d2c688c244eb7a4570b24c9ed7b4a8c619eb02596f8862\", 1000")
);
int timeout = 0;
uint256 hash = uint256S(request.params[0].get_str());
if (!request.params[1].isNull())
timeout = request.params[1].get_int();
CUpdatedBlock block;
{
std::unique_lock<std::mutex> lock(cs_blockchange);
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&hash]{return latestblock.hash == hash || !IsRPCRunning();});
else
cond_blockchange.wait(lock, [&hash]{return latestblock.hash == hash || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.push_back(Pair("hash", block.hash.GetHex()));
ret.push_back(Pair("height", block.height));
return ret;
}
UniValue waitforblockheight(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
"waitforblockheight <height> (timeout)\n"
"\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"
"\nArguments:\n"
"1. height (required, int) Block height to wait for (int)\n"
"2. timeout (int, optional, default=0) Time in milliseconds to wait for a response. 0 indicates no timeout.\n"
"\nResult:\n"
"{ (json object)\n"
" \"hash\" : { (string) The blockhash\n"
" \"height\" : { (int) Block height\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("waitforblockheight", "\"100\", 1000")
+ HelpExampleRpc("waitforblockheight", "\"100\", 1000")
);
int timeout = 0;
int height = request.params[0].get_int();
if (!request.params[1].isNull())
timeout = request.params[1].get_int();
CUpdatedBlock block;
{
std::unique_lock<std::mutex> lock(cs_blockchange);
if(timeout)
cond_blockchange.wait_for(lock, std::chrono::milliseconds(timeout), [&height]{return latestblock.height >= height || !IsRPCRunning();});
else
cond_blockchange.wait(lock, [&height]{return latestblock.height >= height || !IsRPCRunning(); });
block = latestblock;
}
UniValue ret(UniValue::VOBJ);
ret.push_back(Pair("hash", block.hash.GetHex()));
ret.push_back(Pair("height", block.height));
return ret;
}
UniValue getdifficulty(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 0)
throw std::runtime_error(
"getdifficulty\n"
"\nReturns the proof-of-work difficulty as a multiple of the minimum difficulty.\n"
"\nResult:\n"
"n.nnn (numeric) the proof-of-work difficulty as a multiple of the minimum difficulty.\n"
"\nExamples:\n"
+ HelpExampleCli("getdifficulty", "")
+ HelpExampleRpc("getdifficulty", "")
);
LOCK(cs_main);
return GetDifficulty();
}
std::string EntryDescriptionString()
{
return " \"size\" : n, (numeric) virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted.\n"
" \"fee\" : n, (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
" \"modifiedfee\" : n, (numeric) transaction fee with fee deltas used for mining priority\n"
" \"time\" : n, (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT\n"
" \"height\" : n, (numeric) block height when transaction entered pool\n"
" \"descendantcount\" : n, (numeric) number of in-mempool descendant transactions (including this one)\n"
" \"descendantsize\" : n, (numeric) virtual transaction size of in-mempool descendants (including this one)\n"
" \"descendantfees\" : n, (numeric) modified fees (see above) of in-mempool descendants (including this one)\n"
" \"ancestorcount\" : n, (numeric) number of in-mempool ancestor transactions (including this one)\n"
" \"ancestorsize\" : n, (numeric) virtual transaction size of in-mempool ancestors (including this one)\n"
" \"ancestorfees\" : n, (numeric) modified fees (see above) of in-mempool ancestors (including this one)\n"
" \"depends\" : [ (array) unconfirmed transactions used as inputs for this transaction\n"
" \"transactionid\", (string) parent transaction id\n"
" ... ]\n";
}
void entryToJSON(UniValue &info, const CTxMemPoolEntry &e)
{
AssertLockHeld(mempool.cs);
info.push_back(Pair("size", (int)e.GetTxSize()));
info.push_back(Pair("fee", ValueFromAmount(e.GetFee())));
info.push_back(Pair("modifiedfee", ValueFromAmount(e.GetModifiedFee())));
info.push_back(Pair("time", e.GetTime()));
info.push_back(Pair("height", (int)e.GetHeight()));
info.push_back(Pair("descendantcount", e.GetCountWithDescendants()));
info.push_back(Pair("descendantsize", e.GetSizeWithDescendants()));
info.push_back(Pair("descendantfees", e.GetModFeesWithDescendants()));
info.push_back(Pair("ancestorcount", e.GetCountWithAncestors()));
info.push_back(Pair("ancestorsize", e.GetSizeWithAncestors()));
info.push_back(Pair("ancestorfees", e.GetModFeesWithAncestors()));
const CTransaction& tx = e.GetTx();
std::set<std::string> setDepends;
for (const CTxIn& txin : tx.vin)
{
if (mempool.exists(txin.prevout.hash))
setDepends.insert(txin.prevout.hash.ToString());
}
UniValue depends(UniValue::VARR);
for (const std::string& dep : setDepends)
{
depends.push_back(dep);
}
info.push_back(Pair("depends", depends));
}
UniValue mempoolToJSON(bool fVerbose)
{
if (fVerbose)
{
LOCK(mempool.cs);
UniValue o(UniValue::VOBJ);
for (const CTxMemPoolEntry& e : mempool.mapTx)
{
const uint256& hash = e.GetTx().GetHash();
UniValue info(UniValue::VOBJ);
entryToJSON(info, e);
o.push_back(Pair(hash.ToString(), info));
}
return o;
}
else
{
std::vector<uint256> vtxid;
mempool.queryHashes(vtxid);
UniValue a(UniValue::VARR);
for (const uint256& hash : vtxid)
a.push_back(hash.ToString());
return a;
}
}
UniValue getrawmempool(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() > 1)
throw std::runtime_error(
"getrawmempool ( verbose )\n"
"\nReturns all transaction ids in memory pool as a json array of string transaction ids.\n"
"\nHint: use getmempoolentry to fetch a specific transaction from the mempool.\n"
"\nArguments:\n"
"1. verbose (boolean, optional, default=false) True for a json object, false for array of transaction ids\n"
"\nResult: (for verbose = false):\n"
"[ (json array of string)\n"
" \"transactionid\" (string) The transaction id\n"
" ,...\n"
"]\n"
"\nResult: (for verbose = true):\n"
"{ (json object)\n"
" \"transactionid\" : { (json object)\n"
+ EntryDescriptionString()
+ " }, ...\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("getrawmempool", "true")
+ HelpExampleRpc("getrawmempool", "true")
);
bool fVerbose = false;
if (!request.params[0].isNull())
fVerbose = request.params[0].get_bool();
return mempoolToJSON(fVerbose);
}
UniValue getmempoolancestors(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) {
throw std::runtime_error(
"getmempoolancestors txid (verbose)\n"
"\nIf txid is in the mempool, returns all in-mempool ancestors.\n"
"\nArguments:\n"
"1. \"txid\" (string, required) The transaction id (must be in mempool)\n"
"2. verbose (boolean, optional, default=false) True for a json object, false for array of transaction ids\n"
"\nResult (for verbose=false):\n"
"[ (json array of strings)\n"
" \"transactionid\" (string) The transaction id of an in-mempool ancestor transaction\n"
" ,...\n"
"]\n"
"\nResult (for verbose=true):\n"
"{ (json object)\n"
" \"transactionid\" : { (json object)\n"
+ EntryDescriptionString()
+ " }, ...\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("getmempoolancestors", "\"mytxid\"")
+ HelpExampleRpc("getmempoolancestors", "\"mytxid\"")
);
}
bool fVerbose = false;
if (!request.params[1].isNull())
fVerbose = request.params[1].get_bool();
uint256 hash = ParseHashV(request.params[0], "parameter 1");
LOCK(mempool.cs);
CTxMemPool::txiter it = mempool.mapTx.find(hash);
if (it == mempool.mapTx.end()) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not in mempool");
}
CTxMemPool::setEntries setAncestors;
uint64_t noLimit = std::numeric_limits<uint64_t>::max();
std::string dummy;
mempool.CalculateMemPoolAncestors(*it, setAncestors, noLimit, noLimit, noLimit, noLimit, dummy, false);
if (!fVerbose) {
UniValue o(UniValue::VARR);
for (CTxMemPool::txiter ancestorIt : setAncestors) {
o.push_back(ancestorIt->GetTx().GetHash().ToString());
}
return o;
} else {
UniValue o(UniValue::VOBJ);
for (CTxMemPool::txiter ancestorIt : setAncestors) {
const CTxMemPoolEntry &e = *ancestorIt;
const uint256& _hash = e.GetTx().GetHash();
UniValue info(UniValue::VOBJ);
entryToJSON(info, e);
o.push_back(Pair(_hash.ToString(), info));
}
return o;
}
}
UniValue getmempooldescendants(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) {
throw std::runtime_error(
"getmempooldescendants txid (verbose)\n"
"\nIf txid is in the mempool, returns all in-mempool descendants.\n"
"\nArguments:\n"
"1. \"txid\" (string, required) The transaction id (must be in mempool)\n"
"2. verbose (boolean, optional, default=false) True for a json object, false for array of transaction ids\n"
"\nResult (for verbose=false):\n"
"[ (json array of strings)\n"
" \"transactionid\" (string) The transaction id of an in-mempool descendant transaction\n"
" ,...\n"
"]\n"
"\nResult (for verbose=true):\n"
"{ (json object)\n"
" \"transactionid\" : { (json object)\n"
+ EntryDescriptionString()
+ " }, ...\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("getmempooldescendants", "\"mytxid\"")
+ HelpExampleRpc("getmempooldescendants", "\"mytxid\"")
);
}
bool fVerbose = false;
if (!request.params[1].isNull())
fVerbose = request.params[1].get_bool();
uint256 hash = ParseHashV(request.params[0], "parameter 1");
LOCK(mempool.cs);
CTxMemPool::txiter it = mempool.mapTx.find(hash);
if (it == mempool.mapTx.end()) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not in mempool");
}
CTxMemPool::setEntries setDescendants;
mempool.CalculateDescendants(it, setDescendants);
// CTxMemPool::CalculateDescendants will include the given tx
setDescendants.erase(it);
if (!fVerbose) {
UniValue o(UniValue::VARR);
for (CTxMemPool::txiter descendantIt : setDescendants) {
o.push_back(descendantIt->GetTx().GetHash().ToString());
}
return o;
} else {
UniValue o(UniValue::VOBJ);
for (CTxMemPool::txiter descendantIt : setDescendants) {
const CTxMemPoolEntry &e = *descendantIt;
const uint256& _hash = e.GetTx().GetHash();
UniValue info(UniValue::VOBJ);
entryToJSON(info, e);
o.push_back(Pair(_hash.ToString(), info));
}
return o;
}
}
UniValue getmempoolentry(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 1) {
throw std::runtime_error(
"getmempoolentry txid\n"
"\nReturns mempool data for given transaction\n"
"\nArguments:\n"
"1. \"txid\" (string, required) The transaction id (must be in mempool)\n"
"\nResult:\n"
"{ (json object)\n"
+ EntryDescriptionString()
+ "}\n"
"\nExamples:\n"
+ HelpExampleCli("getmempoolentry", "\"mytxid\"")
+ HelpExampleRpc("getmempoolentry", "\"mytxid\"")
);
}
uint256 hash = ParseHashV(request.params[0], "parameter 1");
LOCK(mempool.cs);
CTxMemPool::txiter it = mempool.mapTx.find(hash);
if (it == mempool.mapTx.end()) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not in mempool");
}
const CTxMemPoolEntry &e = *it;
UniValue info(UniValue::VOBJ);
entryToJSON(info, e);
return info;
}
UniValue getblockhash(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 1)
throw std::runtime_error(
"getblockhash height\n"
"\nReturns hash of block in best-block-chain at height provided.\n"
"\nArguments:\n"
"1. height (numeric, required) The height index\n"
"\nResult:\n"
"\"hash\" (string) The block hash\n"
"\nExamples:\n"
+ HelpExampleCli("getblockhash", "1000")
+ HelpExampleRpc("getblockhash", "1000")
);
LOCK(cs_main);
int nHeight = request.params[0].get_int();
if (nHeight < 0 || nHeight > chainActive.Height())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Block height out of range");
CBlockIndex* pblockindex = chainActive[nHeight];
return pblockindex->GetBlockHash().GetHex();
}
UniValue getblockheader(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
"getblockheader \"hash\" ( verbose )\n"
"\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"
"\nArguments:\n"
"1. \"hash\" (string, required) The block hash\n"
"2. verbose (boolean, optional, default=true) true for a json object, false for the hex encoded data\n"
"\nResult (for verbose = true):\n"
"{\n"
" \"hash\" : \"hash\", (string) the block hash (same as provided)\n"
" \"confirmations\" : n, (numeric) The number of confirmations, or -1 if the block is not on the main chain\n"
" \"height\" : n, (numeric) The block height or index\n"
" \"version\" : n, (numeric) The block version\n"
" \"versionHex\" : \"00000000\", (string) The block version formatted in hexadecimal\n"
" \"merkleroot\" : \"xxxx\", (string) The merkle root\n"
" \"time\" : ttt, (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)\n"
" \"mediantime\" : ttt, (numeric) The median block time in seconds since epoch (Jan 1 1970 GMT)\n"
" \"nonce\" : n, (numeric) The nonce\n"
" \"bits\" : \"1d00ffff\", (string) The bits\n"
" \"difficulty\" : x.xxx, (numeric) The difficulty\n"
" \"chainwork\" : \"0000...1f3\" (string) Expected number of hashes required to produce the current chain (in hex)\n"
" \"previousblockhash\" : \"hash\", (string) The hash of the previous block\n"
" \"nextblockhash\" : \"hash\", (string) The hash of the next block\n"
"}\n"
"\nResult (for verbose=false):\n"
"\"data\" (string) A string that is serialized, hex-encoded data for block 'hash'.\n"
"\nExamples:\n"
+ HelpExampleCli("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
+ HelpExampleRpc("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
);
LOCK(cs_main);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
bool fVerbose = true;
if (!request.params[1].isNull())
fVerbose = request.params[1].get_bool();
if (mapBlockIndex.count(hash) == 0)
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
CBlockIndex* pblockindex = mapBlockIndex[hash];
if (!fVerbose)
{
CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
ssBlock << pblockindex->GetBlockHeader();
std::string strHex = HexStr(ssBlock.begin(), ssBlock.end());
return strHex;
}
return blockheaderToJSON(pblockindex);
}
UniValue getblock(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
throw std::runtime_error(
"getblock \"blockhash\" ( verbosity ) \n"
"\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"
"\nArguments:\n"
"1. \"blockhash\" (string, required) The block hash\n"
"2. verbosity (numeric, optional, default=1) 0 for hex encoded data, 1 for a json object, and 2 for json object with transaction data\n"
"\nResult (for verbosity = 0):\n"
"\"data\" (string) A string that is serialized, hex-encoded data for block 'hash'.\n"
"\nResult (for verbosity = 1):\n"
"{\n"
" \"hash\" : \"hash\", (string) the block hash (same as provided)\n"
" \"confirmations\" : n, (numeric) The number of confirmations, or -1 if the block is not on the main chain\n"
" \"size\" : n, (numeric) The block size\n"
" \"strippedsize\" : n, (numeric) The block size excluding witness data\n"
" \"weight\" : n (numeric) The block weight as defined in BIP 141\n"
" \"height\" : n, (numeric) The block height or index\n"
" \"version\" : n, (numeric) The block version\n"
" \"versionHex\" : \"00000000\", (string) The block version formatted in hexadecimal\n"
" \"merkleroot\" : \"xxxx\", (string) The merkle root\n"
" \"tx\" : [ (array of string) The transaction ids\n"
" \"transactionid\" (string) The transaction id\n"
" ,...\n"
" ],\n"
" \"time\" : ttt, (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)\n"
" \"mediantime\" : ttt, (numeric) The median block time in seconds since epoch (Jan 1 1970 GMT)\n"
" \"nonce\" : n, (numeric) The nonce\n"
" \"bits\" : \"1d00ffff\", (string) The bits\n"
" \"difficulty\" : x.xxx, (numeric) The difficulty\n"
" \"chainwork\" : \"xxxx\", (string) Expected number of hashes required to produce the chain up to this block (in hex)\n"
" \"previousblockhash\" : \"hash\", (string) The hash of the previous block\n"
" \"nextblockhash\" : \"hash\" (string) The hash of the next block\n"
"}\n"
"\nResult (for verbosity = 2):\n"
"{\n"
" ..., Same output as verbosity = 1.\n"
" \"tx\" : [ (array of Objects) The transactions in the format of the getrawtransaction RPC. Different from verbosity = 1 \"tx\" result.\n"
" ,...\n"
" ],\n"
" ,... Same output as verbosity = 1.\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("getblock", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
+ HelpExampleRpc("getblock", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
);
LOCK(cs_main);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
int verbosity = 1;
if (!request.params[1].isNull()) {
if(request.params[1].isNum())
verbosity = request.params[1].get_int();
else
verbosity = request.params[1].get_bool() ? 1 : 0;
}
if (mapBlockIndex.count(hash) == 0)
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
CBlock block;
CBlockIndex* pblockindex = mapBlockIndex[hash];
if (fHavePruned && !(pblockindex->nStatus & BLOCK_HAVE_DATA) && pblockindex->nTx > 0)
throw JSONRPCError(RPC_MISC_ERROR, "Block not available (pruned data)");
if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus()))
// Block not found on disk. This could be because we have the block
// header in our index but don't have the block (for example if a
// non-whitelisted node sends us an unrequested long chain of valid
// blocks, we add the headers to our index, but don't accept the
// block).
throw JSONRPCError(RPC_MISC_ERROR, "Block not found on disk");
if (verbosity <= 0)
{
CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
ssBlock << block;
std::string strHex = HexStr(ssBlock.begin(), ssBlock.end());
return strHex;
}
return blockToJSON(block, 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);
stats.nTransactions++;
for (const auto output : outputs) {
ss << VARINT(output.first + 1);
ss << output.second.out.scriptPubKey;
ss << VARINT(output.second.out.nValue);
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(0);
}
//! Calculate statistics about the unspent transaction output set
static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
{
std::unique_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;
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;
}
UniValue pruneblockchain(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 1)
throw std::runtime_error(
"pruneblockchain\n"
"\nArguments:\n"
"1. \"height\" (numeric, required) The block height to prune up to. May be set to a discrete height, or a unix timestamp\n"
" to prune blocks whose block time is at least 2 hours older than the provided timestamp.\n"
"\nResult:\n"
"n (numeric) Height of the last block pruned.\n"
"\nExamples:\n"
+ HelpExampleCli("pruneblockchain", "1000")
+ HelpExampleRpc("pruneblockchain", "1000"));
if (!fPruneMode)
throw JSONRPCError(RPC_MISC_ERROR, "Cannot prune blocks because node is not in prune mode.");
LOCK(cs_main);
int heightParam = request.params[0].get_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
CBlockIndex* pindex = chainActive.FindEarliestAtLeast(heightParam - TIMESTAMP_WINDOW);
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) chainActive.Height();
if (chainHeight < Params().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.");
height = chainHeight - MIN_BLOCKS_TO_KEEP;
}
PruneBlockFilesManual(height);
return uint64_t(height);
}
UniValue gettxoutsetinfo(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() != 0)
throw std::runtime_error(
"gettxoutsetinfo\n"
"\nReturns statistics about the unspent transaction output set.\n"
"Note this call may take some time.\n"
"\nResult:\n"
"{\n"
" \"height\":n, (numeric) The current block height (index)\n"
" \"bestblock\": \"hex\", (string) the best block hash hex\n"
" \"transactions\": n, (numeric) The number of transactions\n"
" \"txouts\": n, (numeric) The number of output transactions\n"
" \"bogosize\": n, (numeric) A meaningless metric for UTXO set size\n"
" \"hash_serialized_2\": \"hash\", (string) The serialized hash\n"
" \"disk_size\": n, (numeric) The estimated size of the chainstate on disk\n"
" \"total_amount\": x.xxx (numeric) The total amount\n"
"}\n"
"\nExamples:\n"
+ HelpExampleCli("gettxoutsetinfo", "")
+ HelpExampleRpc("gettxoutsetinfo", "")
);
UniValue ret(UniValue::VOBJ);
CCoinsStats stats;
FlushStateToDisk();
if (GetUTXOStats(pcoinsdbview, 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));
ret.push_back(Pair("txouts", (int64_t)stats.nTransactionOutputs));
ret.push_back(Pair("bogosize", (int64_t)stats.nBogoSize));
ret.push_back(Pair("hash_serialized_2", stats.hashSerialized.GetHex()));
ret.push_back(Pair("disk_size", stats.nDiskSize));
ret.push_back(Pair("total_amount", ValueFromAmount(stats.nTotalAmount)));
} else {
throw JSONRPCError(RPC_INTERNAL_ERROR, "Unable to read UTXO set");
}
return ret;
}
UniValue gettxout(const JSONRPCRequest& request)
{
if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
throw std::runtime_error(
"gettxout \"txid\" n ( include_mempool )\n"
"\nReturns details about an unspent transaction output.\n"
"\nArguments:\n"
"1. \"txid\" (string, required) The transaction id\n"
"2. n (numeric, required) vout number\n"
"3. include_mempool (boolean, optional) Whether to include the mempool\n"
"\nResult:\n"
"{\n"
" \"bestblock\" : \"hash\", (string) the block hash\n"
" \"confirmations\" : n, (numeric) The number of confirmations\n"
" \"value\" : x.xxx, (numeric) The transaction value in " + CURRENCY_UNIT + "\n"
" \"scriptPubKey\" : { (json object)\n"
" \"asm\" : \"code\", (string) \n"
" \"hex\" : \"hex\", (string) \n"
" \"reqSigs\" : n, (numeric) Number of required signatures\n"
" \"type\" : \"pubkeyhash\", (string) The type, eg pubkeyhash\n"
" \"addresses\" : [ (array of string) array of bitcoin addresses\n"
" \"address\" (string) bitcoin address\n"
" ,...\n"
" ]\n"
" },\n"
" \"coinbase\" : true|false (boolean) Coinbase or not\n"
"}\n"
"\nExamples:\n"
"\nGet unspent transactions\n"
+ HelpExampleCli("listunspent", "") +
"\nView the details\n"
+ HelpExampleCli("gettxout", "\"txid\" 1") +
"\nAs a json rpc call\n"
+ HelpExampleRpc("gettxout", "\"txid\", 1")
);
LOCK(cs_main);
UniValue ret(UniValue::VOBJ);
std::string strHash = request.params[0].get_str();
uint256 hash(uint256S(strHash));
int n = request.params[1].get_int();
COutPoint out(hash, n);
bool fMempool = true;
if (!request.params[2].isNull())
fMempool = request.params[2].get_bool();
Coin coin;
if (fMempool) {
LOCK(mempool.cs);
CCoinsViewMemPool view(pcoinsTip, mempool);
if (!view.GetCoin(out, coin) || mempool.isSpent(out)) {
return NullUniValue;
}
} else {
if (!pcoinsTip->GetCoin(out, coin)) {
return NullUniValue;
}
}