618 lines
19 KiB
C++
618 lines
19 KiB
C++
// Copyright (c) 2010 Satoshi Nakamoto
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// Copyright (c) 2009-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <rpc/server.h>
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#include <fs.h>
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#include <key_io.h>
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#include <random.h>
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#include <rpc/util.h>
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#include <shutdown.h>
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#include <sync.h>
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#include <ui_interface.h>
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#include <util/strencodings.h>
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#include <util/system.h>
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#include <boost/signals2/signal.hpp>
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#include <boost/algorithm/string/classification.hpp>
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#include <boost/algorithm/string/split.hpp>
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#include <memory> // for unique_ptr
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#include <unordered_map>
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static CCriticalSection cs_rpcWarmup;
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static std::atomic<bool> g_rpc_running{false};
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static bool fRPCInWarmup GUARDED_BY(cs_rpcWarmup) = true;
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static std::string rpcWarmupStatus GUARDED_BY(cs_rpcWarmup) = "RPC server started";
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/* Timer-creating functions */
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static RPCTimerInterface* timerInterface = nullptr;
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/* Map of name to timer. */
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static std::map<std::string, std::unique_ptr<RPCTimerBase> > deadlineTimers;
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struct RPCCommandExecutionInfo
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{
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std::string method;
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int64_t start;
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};
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struct RPCServerInfo
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{
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Mutex mutex;
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std::list<RPCCommandExecutionInfo> active_commands GUARDED_BY(mutex);
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};
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static RPCServerInfo g_rpc_server_info;
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struct RPCCommandExecution
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{
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std::list<RPCCommandExecutionInfo>::iterator it;
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explicit RPCCommandExecution(const std::string& method)
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{
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LOCK(g_rpc_server_info.mutex);
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it = g_rpc_server_info.active_commands.insert(g_rpc_server_info.active_commands.end(), {method, GetTimeMicros()});
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}
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~RPCCommandExecution()
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{
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LOCK(g_rpc_server_info.mutex);
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g_rpc_server_info.active_commands.erase(it);
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}
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};
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static struct CRPCSignals
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{
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boost::signals2::signal<void ()> Started;
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boost::signals2::signal<void ()> Stopped;
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} g_rpcSignals;
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void RPCServer::OnStarted(std::function<void ()> slot)
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{
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g_rpcSignals.Started.connect(slot);
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}
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void RPCServer::OnStopped(std::function<void ()> slot)
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{
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g_rpcSignals.Stopped.connect(slot);
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}
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void RPCTypeCheck(const UniValue& params,
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const std::list<UniValueType>& typesExpected,
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bool fAllowNull)
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{
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unsigned int i = 0;
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for (const UniValueType& t : typesExpected) {
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if (params.size() <= i)
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break;
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const UniValue& v = params[i];
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if (!(fAllowNull && v.isNull())) {
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RPCTypeCheckArgument(v, t);
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}
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i++;
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}
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}
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void RPCTypeCheckArgument(const UniValue& value, const UniValueType& typeExpected)
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{
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if (!typeExpected.typeAny && value.type() != typeExpected.type) {
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throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Expected type %s, got %s", uvTypeName(typeExpected.type), uvTypeName(value.type())));
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}
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}
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void RPCTypeCheckObj(const UniValue& o,
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const std::map<std::string, UniValueType>& typesExpected,
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bool fAllowNull,
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bool fStrict)
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{
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for (const auto& t : typesExpected) {
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const UniValue& v = find_value(o, t.first);
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if (!fAllowNull && v.isNull())
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throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Missing %s", t.first));
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if (!(t.second.typeAny || v.type() == t.second.type || (fAllowNull && v.isNull()))) {
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std::string err = strprintf("Expected type %s for %s, got %s",
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uvTypeName(t.second.type), t.first, uvTypeName(v.type()));
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throw JSONRPCError(RPC_TYPE_ERROR, err);
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}
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}
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if (fStrict)
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{
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for (const std::string& k : o.getKeys())
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{
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if (typesExpected.count(k) == 0)
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{
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std::string err = strprintf("Unexpected key %s", k);
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throw JSONRPCError(RPC_TYPE_ERROR, err);
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}
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}
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}
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}
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CAmount AmountFromValue(const UniValue& value)
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{
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if (!value.isNum() && !value.isStr())
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throw JSONRPCError(RPC_TYPE_ERROR, "Amount is not a number or string");
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CAmount amount;
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if (!ParseFixedPoint(value.getValStr(), 8, &amount))
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throw JSONRPCError(RPC_TYPE_ERROR, "Invalid amount");
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if (!MoneyRange(amount))
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throw JSONRPCError(RPC_TYPE_ERROR, "Amount out of range");
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return amount;
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}
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uint256 ParseHashV(const UniValue& v, std::string strName)
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{
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std::string strHex(v.get_str());
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if (64 != strHex.length())
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throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("%s must be of length %d (not %d, for '%s')", strName, 64, strHex.length(), strHex));
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if (!IsHex(strHex)) // Note: IsHex("") is false
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throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')");
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return uint256S(strHex);
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}
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uint256 ParseHashO(const UniValue& o, std::string strKey)
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{
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return ParseHashV(find_value(o, strKey), strKey);
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}
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std::vector<unsigned char> ParseHexV(const UniValue& v, std::string strName)
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{
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std::string strHex;
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if (v.isStr())
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strHex = v.get_str();
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if (!IsHex(strHex))
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throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')");
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return ParseHex(strHex);
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}
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std::vector<unsigned char> ParseHexO(const UniValue& o, std::string strKey)
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{
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return ParseHexV(find_value(o, strKey), strKey);
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}
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std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest& helpreq) const
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{
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std::string strRet;
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std::string category;
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std::set<rpcfn_type> setDone;
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std::vector<std::pair<std::string, const CRPCCommand*> > vCommands;
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for (const auto& entry : mapCommands)
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vCommands.push_back(make_pair(entry.second->category + entry.first, entry.second));
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sort(vCommands.begin(), vCommands.end());
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JSONRPCRequest jreq(helpreq);
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jreq.fHelp = true;
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jreq.params = UniValue();
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for (const std::pair<std::string, const CRPCCommand*>& command : vCommands)
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{
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const CRPCCommand *pcmd = command.second;
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std::string strMethod = pcmd->name;
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if ((strCommand != "" || pcmd->category == "hidden") && strMethod != strCommand)
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continue;
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jreq.strMethod = strMethod;
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try
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{
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rpcfn_type pfn = pcmd->actor;
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if (setDone.insert(pfn).second)
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(*pfn)(jreq);
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}
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catch (const std::exception& e)
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{
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// Help text is returned in an exception
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std::string strHelp = std::string(e.what());
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if (strCommand == "")
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{
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if (strHelp.find('\n') != std::string::npos)
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strHelp = strHelp.substr(0, strHelp.find('\n'));
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if (category != pcmd->category)
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{
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if (!category.empty())
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strRet += "\n";
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category = pcmd->category;
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strRet += "== " + Capitalize(category) + " ==\n";
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}
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}
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strRet += strHelp + "\n";
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}
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}
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if (strRet == "")
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strRet = strprintf("help: unknown command: %s\n", strCommand);
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strRet = strRet.substr(0,strRet.size()-1);
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return strRet;
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}
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UniValue help(const JSONRPCRequest& jsonRequest)
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{
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if (jsonRequest.fHelp || jsonRequest.params.size() > 1)
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throw std::runtime_error(
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RPCHelpMan{"help",
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"\nList all commands, or get help for a specified command.\n",
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{
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{"command", RPCArg::Type::STR, /* default */ "all commands", "The command to get help on"},
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},
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RPCResult{
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"\"text\" (string) The help text\n"
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},
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RPCExamples{""},
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}.ToString()
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);
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std::string strCommand;
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if (jsonRequest.params.size() > 0)
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strCommand = jsonRequest.params[0].get_str();
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return tableRPC.help(strCommand, jsonRequest);
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}
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UniValue stop(const JSONRPCRequest& jsonRequest)
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{
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// Accept the deprecated and ignored 'detach' boolean argument
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// Also accept the hidden 'wait' integer argument (milliseconds)
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// For instance, 'stop 1000' makes the call wait 1 second before returning
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// to the client (intended for testing)
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if (jsonRequest.fHelp || jsonRequest.params.size() > 1)
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throw std::runtime_error(
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RPCHelpMan{"stop",
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"\nStop Bitcoin server.",
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{},
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RPCResults{},
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RPCExamples{""},
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}.ToString());
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// Event loop will exit after current HTTP requests have been handled, so
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// this reply will get back to the client.
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StartShutdown();
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if (jsonRequest.params[0].isNum()) {
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MilliSleep(jsonRequest.params[0].get_int());
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}
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return "Bitcoin server stopping";
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}
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static UniValue uptime(const JSONRPCRequest& jsonRequest)
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{
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if (jsonRequest.fHelp || jsonRequest.params.size() > 0)
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throw std::runtime_error(
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RPCHelpMan{"uptime",
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"\nReturns the total uptime of the server.\n",
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{},
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RPCResult{
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"ttt (numeric) The number of seconds that the server has been running\n"
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},
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RPCExamples{
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HelpExampleCli("uptime", "")
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+ HelpExampleRpc("uptime", "")
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},
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}.ToString());
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return GetTime() - GetStartupTime();
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}
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static UniValue getrpcinfo(const JSONRPCRequest& request)
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{
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if (request.fHelp || request.params.size() > 0) {
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throw std::runtime_error(
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RPCHelpMan{"getrpcinfo",
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"\nReturns details of the RPC server.\n",
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{},
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RPCResults{},
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RPCExamples{""},
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}.ToString()
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);
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}
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LOCK(g_rpc_server_info.mutex);
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UniValue active_commands(UniValue::VARR);
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for (const RPCCommandExecutionInfo& info : g_rpc_server_info.active_commands) {
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UniValue entry(UniValue::VOBJ);
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entry.pushKV("method", info.method);
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entry.pushKV("duration", GetTimeMicros() - info.start);
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active_commands.push_back(entry);
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}
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UniValue result(UniValue::VOBJ);
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result.pushKV("active_commands", active_commands);
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return result;
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}
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// clang-format off
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static const CRPCCommand vRPCCommands[] =
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{ // category name actor (function) argNames
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// --------------------- ------------------------ ----------------------- ----------
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/* Overall control/query calls */
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{ "control", "getrpcinfo", &getrpcinfo, {} },
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{ "control", "help", &help, {"command"} },
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{ "control", "stop", &stop, {"wait"} },
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{ "control", "uptime", &uptime, {} },
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};
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// clang-format on
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CRPCTable::CRPCTable()
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{
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unsigned int vcidx;
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for (vcidx = 0; vcidx < (sizeof(vRPCCommands) / sizeof(vRPCCommands[0])); vcidx++)
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{
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const CRPCCommand *pcmd;
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pcmd = &vRPCCommands[vcidx];
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mapCommands[pcmd->name] = pcmd;
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}
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}
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const CRPCCommand *CRPCTable::operator[](const std::string &name) const
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{
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std::map<std::string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
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if (it == mapCommands.end())
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return nullptr;
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return (*it).second;
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}
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bool CRPCTable::appendCommand(const std::string& name, const CRPCCommand* pcmd)
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{
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if (IsRPCRunning())
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return false;
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// don't allow overwriting for now
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std::map<std::string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
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if (it != mapCommands.end())
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return false;
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mapCommands[name] = pcmd;
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return true;
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}
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void StartRPC()
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{
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LogPrint(BCLog::RPC, "Starting RPC\n");
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g_rpc_running = true;
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g_rpcSignals.Started();
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}
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void InterruptRPC()
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{
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LogPrint(BCLog::RPC, "Interrupting RPC\n");
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// Interrupt e.g. running longpolls
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g_rpc_running = false;
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}
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void StopRPC()
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{
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LogPrint(BCLog::RPC, "Stopping RPC\n");
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deadlineTimers.clear();
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DeleteAuthCookie();
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g_rpcSignals.Stopped();
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}
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bool IsRPCRunning()
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{
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return g_rpc_running;
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}
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void SetRPCWarmupStatus(const std::string& newStatus)
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{
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LOCK(cs_rpcWarmup);
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rpcWarmupStatus = newStatus;
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}
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void SetRPCWarmupFinished()
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{
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LOCK(cs_rpcWarmup);
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assert(fRPCInWarmup);
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fRPCInWarmup = false;
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}
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bool RPCIsInWarmup(std::string *outStatus)
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{
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LOCK(cs_rpcWarmup);
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if (outStatus)
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*outStatus = rpcWarmupStatus;
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return fRPCInWarmup;
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}
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void JSONRPCRequest::parse(const UniValue& valRequest)
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{
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// Parse request
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if (!valRequest.isObject())
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throw JSONRPCError(RPC_INVALID_REQUEST, "Invalid Request object");
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const UniValue& request = valRequest.get_obj();
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// Parse id now so errors from here on will have the id
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id = find_value(request, "id");
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// Parse method
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UniValue valMethod = find_value(request, "method");
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if (valMethod.isNull())
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throw JSONRPCError(RPC_INVALID_REQUEST, "Missing method");
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if (!valMethod.isStr())
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throw JSONRPCError(RPC_INVALID_REQUEST, "Method must be a string");
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strMethod = valMethod.get_str();
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if (fLogIPs)
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LogPrint(BCLog::RPC, "ThreadRPCServer method=%s user=%s peeraddr=%s\n", SanitizeString(strMethod),
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this->authUser, this->peerAddr);
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else
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LogPrint(BCLog::RPC, "ThreadRPCServer method=%s user=%s\n", SanitizeString(strMethod), this->authUser);
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// Parse params
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UniValue valParams = find_value(request, "params");
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if (valParams.isArray() || valParams.isObject())
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params = valParams;
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else if (valParams.isNull())
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params = UniValue(UniValue::VARR);
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else
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throw JSONRPCError(RPC_INVALID_REQUEST, "Params must be an array or object");
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}
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bool IsDeprecatedRPCEnabled(const std::string& method)
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{
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const std::vector<std::string> enabled_methods = gArgs.GetArgs("-deprecatedrpc");
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return find(enabled_methods.begin(), enabled_methods.end(), method) != enabled_methods.end();
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}
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static UniValue JSONRPCExecOne(JSONRPCRequest jreq, const UniValue& req)
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{
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UniValue rpc_result(UniValue::VOBJ);
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try {
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jreq.parse(req);
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UniValue result = tableRPC.execute(jreq);
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rpc_result = JSONRPCReplyObj(result, NullUniValue, jreq.id);
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}
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catch (const UniValue& objError)
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{
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rpc_result = JSONRPCReplyObj(NullUniValue, objError, jreq.id);
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}
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catch (const std::exception& e)
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{
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rpc_result = JSONRPCReplyObj(NullUniValue,
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JSONRPCError(RPC_PARSE_ERROR, e.what()), jreq.id);
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}
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return rpc_result;
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}
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std::string JSONRPCExecBatch(const JSONRPCRequest& jreq, const UniValue& vReq)
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{
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UniValue ret(UniValue::VARR);
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for (unsigned int reqIdx = 0; reqIdx < vReq.size(); reqIdx++)
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ret.push_back(JSONRPCExecOne(jreq, vReq[reqIdx]));
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return ret.write() + "\n";
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}
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/**
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* Process named arguments into a vector of positional arguments, based on the
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* passed-in specification for the RPC call's arguments.
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*/
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static inline JSONRPCRequest transformNamedArguments(const JSONRPCRequest& in, const std::vector<std::string>& argNames)
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{
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JSONRPCRequest out = in;
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out.params = UniValue(UniValue::VARR);
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// Build a map of parameters, and remove ones that have been processed, so that we can throw a focused error if
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// there is an unknown one.
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const std::vector<std::string>& keys = in.params.getKeys();
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const std::vector<UniValue>& values = in.params.getValues();
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std::unordered_map<std::string, const UniValue*> argsIn;
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for (size_t i=0; i<keys.size(); ++i) {
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argsIn[keys[i]] = &values[i];
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}
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// Process expected parameters.
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int hole = 0;
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for (const std::string &argNamePattern: argNames) {
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std::vector<std::string> vargNames;
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boost::algorithm::split(vargNames, argNamePattern, boost::algorithm::is_any_of("|"));
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auto fr = argsIn.end();
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for (const std::string & argName : vargNames) {
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fr = argsIn.find(argName);
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if (fr != argsIn.end()) {
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break;
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}
|
|
}
|
|
if (fr != argsIn.end()) {
|
|
for (int i = 0; i < hole; ++i) {
|
|
// Fill hole between specified parameters with JSON nulls,
|
|
// but not at the end (for backwards compatibility with calls
|
|
// that act based on number of specified parameters).
|
|
out.params.push_back(UniValue());
|
|
}
|
|
hole = 0;
|
|
out.params.push_back(*fr->second);
|
|
argsIn.erase(fr);
|
|
} else {
|
|
hole += 1;
|
|
}
|
|
}
|
|
// If there are still arguments in the argsIn map, this is an error.
|
|
if (!argsIn.empty()) {
|
|
throw JSONRPCError(RPC_INVALID_PARAMETER, "Unknown named parameter " + argsIn.begin()->first);
|
|
}
|
|
// Return request with named arguments transformed to positional arguments
|
|
return out;
|
|
}
|
|
|
|
UniValue CRPCTable::execute(const JSONRPCRequest &request) const
|
|
{
|
|
// Return immediately if in warmup
|
|
{
|
|
LOCK(cs_rpcWarmup);
|
|
if (fRPCInWarmup)
|
|
throw JSONRPCError(RPC_IN_WARMUP, rpcWarmupStatus);
|
|
}
|
|
|
|
// Find method
|
|
const CRPCCommand *pcmd = tableRPC[request.strMethod];
|
|
if (!pcmd)
|
|
throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found");
|
|
|
|
try
|
|
{
|
|
RPCCommandExecution execution(request.strMethod);
|
|
// Execute, convert arguments to array if necessary
|
|
if (request.params.isObject()) {
|
|
return pcmd->actor(transformNamedArguments(request, pcmd->argNames));
|
|
} else {
|
|
return pcmd->actor(request);
|
|
}
|
|
}
|
|
catch (const std::exception& e)
|
|
{
|
|
throw JSONRPCError(RPC_MISC_ERROR, e.what());
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> CRPCTable::listCommands() const
|
|
{
|
|
std::vector<std::string> commandList;
|
|
for (const auto& i : mapCommands) commandList.emplace_back(i.first);
|
|
return commandList;
|
|
}
|
|
|
|
std::string HelpExampleCli(const std::string& methodname, const std::string& args)
|
|
{
|
|
return "> bitcoin-cli " + methodname + " " + args + "\n";
|
|
}
|
|
|
|
std::string HelpExampleRpc(const std::string& methodname, const std::string& args)
|
|
{
|
|
return "> curl --user myusername --data-binary '{\"jsonrpc\": \"1.0\", \"id\":\"curltest\", "
|
|
"\"method\": \"" + methodname + "\", \"params\": [" + args + "] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/\n";
|
|
}
|
|
|
|
void RPCSetTimerInterfaceIfUnset(RPCTimerInterface *iface)
|
|
{
|
|
if (!timerInterface)
|
|
timerInterface = iface;
|
|
}
|
|
|
|
void RPCSetTimerInterface(RPCTimerInterface *iface)
|
|
{
|
|
timerInterface = iface;
|
|
}
|
|
|
|
void RPCUnsetTimerInterface(RPCTimerInterface *iface)
|
|
{
|
|
if (timerInterface == iface)
|
|
timerInterface = nullptr;
|
|
}
|
|
|
|
void RPCRunLater(const std::string& name, std::function<void()> func, int64_t nSeconds)
|
|
{
|
|
if (!timerInterface)
|
|
throw JSONRPCError(RPC_INTERNAL_ERROR, "No timer handler registered for RPC");
|
|
deadlineTimers.erase(name);
|
|
LogPrint(BCLog::RPC, "queue run of timer %s in %i seconds (using %s)\n", name, nSeconds, timerInterface->Name());
|
|
deadlineTimers.emplace(name, std::unique_ptr<RPCTimerBase>(timerInterface->NewTimer(func, nSeconds*1000)));
|
|
}
|
|
|
|
int RPCSerializationFlags()
|
|
{
|
|
int flag = 0;
|
|
if (gArgs.GetArg("-rpcserialversion", DEFAULT_RPC_SERIALIZE_VERSION) == 0)
|
|
flag |= SERIALIZE_TRANSACTION_NO_WITNESS;
|
|
return flag;
|
|
}
|
|
|
|
CRPCTable tableRPC;
|