Jianping Wu
6 years ago
5 changed files with 312 additions and 279 deletions
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// Copyright (c) 2014-2017 Daniel Kraft
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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// Copyright (c) 2018 the Kevacoin Core Developers
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// Distributed under the MIT/X11 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 "base58.h" |
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#include "coins.h" |
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#include "init.h" |
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#include "keva/common.h" |
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#include "keva/main.h" |
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#include "primitives/transaction.h" |
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#include "random.h" |
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#include "rpc/mining.h" |
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#include "rpc/safemode.h" |
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#include "rpc/server.h" |
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#include "script/keva.h" |
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#include "txmempool.h" |
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#include "util.h" |
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#include "validation.h" |
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#include "wallet/coincontrol.h" |
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#include "wallet/wallet.h" |
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#include <univalue.h> |
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#include <boost/xpressive/xpressive_dynamic.hpp> |
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UniValue keva_get(const JSONRPCRequest& request) |
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{ |
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if (request.fHelp || request.params.size() != 2) { |
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throw std::runtime_error ( |
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"keva_get \"namespace\" \"key\"\n" |
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"\nGet value of the given key.\n" |
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"\nArguments:\n" |
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"1. \"namespace\" (string, required) the namespace to insert the key to\n" |
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"2. \"key\" (string, required) value for the key\n" |
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"\nResult:\n" |
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"\"value\" (string) the value associated with the key\n" |
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"\nExamples:\n" |
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+ HelpExampleCli ("keva_get", "\"namespace_id\", \"key\"") |
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); |
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} |
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RPCTypeCheck(request.params, {UniValue::VSTR, UniValue::VSTR}); |
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RPCTypeCheckArgument(request.params[0], UniValue::VSTR); |
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RPCTypeCheckArgument(request.params[1], UniValue::VSTR); |
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ObserveSafeMode (); |
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const std::string namespaceStr = request.params[0].get_str (); |
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valtype nameSpace; |
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if (!DecodeKevaNamespace(namespaceStr, Params(), nameSpace)) { |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "invalid namespace id"); |
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} |
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if (nameSpace.size() > MAX_NAMESPACE_LENGTH) |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "the namespace is too long"); |
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const std::string keyStr = request.params[1].get_str (); |
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const valtype key = ValtypeFromString (keyStr); |
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if (key.size() > MAX_KEY_LENGTH) |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "the key is too long"); |
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CKevaData data; |
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{ |
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LOCK (cs_main); |
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pcoinsTip->GetName(nameSpace, key, data); |
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} |
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auto value = data.getValue(); |
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// Also get the unconfirmed ones.
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{ |
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LOCK (mempool.cs); |
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valtype val; |
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if (mempool.getUnconfirmedKeyValue(nameSpace, key, val)) { |
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value = val; |
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} |
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} |
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return ValtypeToString(value); |
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} |
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/**
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* Return the help string description to use for keva info objects. |
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* @param indent Indentation at the line starts. |
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* @param trailing Trailing string (e. g., comma for an array of these objects). |
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* @return The description string. |
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*/ |
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std::string getKevaInfoHelp (const std::string& indent, const std::string& trailing) |
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{ |
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std::ostringstream res; |
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res << indent << "{" << std::endl; |
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res << indent << " \"name\": xxxxx, " |
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<< "(string) the requested name" << std::endl; |
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res << indent << " \"value\": xxxxx, " |
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<< "(string) the name's current value" << std::endl; |
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res << indent << " \"txid\": xxxxx, " |
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<< "(string) the name's last update tx" << std::endl; |
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res << indent << " \"address\": xxxxx, " |
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<< "(string) the address holding the name" << std::endl; |
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res << indent << " \"height\": xxxxx, " |
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<< "(numeric) the name's last update height" << std::endl; |
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res << indent << "}" << trailing << std::endl; |
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return res.str (); |
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} |
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/**
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* Utility routine to construct a "name info" object to return. This is used |
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* for name_show and also name_list. |
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* @param name The name. |
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* @param value The name's value. |
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* @param outp The last update's outpoint. |
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* @param addr The name's address script. |
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* @param height The name's last update height. |
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* @return A JSON object to return. |
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*/ |
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UniValue |
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getKevaInfo (const valtype& name, const valtype& value, const COutPoint& outp, |
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const CScript& addr, int height) |
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{ |
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UniValue obj(UniValue::VOBJ); |
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obj.pushKV("name", ValtypeToString(name)); |
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obj.pushKV("value", ValtypeToString(value)); |
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obj.pushKV("txid", outp.hash.GetHex()); |
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obj.pushKV("vout", static_cast<int>(outp.n)); |
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/* Try to extract the address. May fail if we can't parse the script
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as a "standard" script. */ |
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CTxDestination dest; |
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std::string addrStr; |
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if (ExtractDestination(addr, dest)) |
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addrStr = EncodeDestination(dest); |
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else |
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addrStr = "<nonstandard>"; |
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obj.pushKV("address", addrStr); |
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obj.pushKV("height", height); |
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return obj; |
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} |
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/**
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* Return name info object for a CNameData object. |
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* @param name The name. |
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* @param data The name's data. |
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* @return A JSON object to return. |
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*/ |
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UniValue |
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getKevaInfo (const valtype& name, const CKevaData& data) |
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{ |
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return getKevaInfo(name, data.getValue(), data.getUpdateOutpoint(), |
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data.getAddress(), data.getHeight()); |
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} |
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UniValue keva_filter(const JSONRPCRequest& request) |
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{ |
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if (request.fHelp || request.params.size() > 6 || request.params.size() == 0) |
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throw std::runtime_error( |
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"keva_filter (\"namespaceId\" (\"regexp\" (\"from\" (\"nb\" (\"stat\")))))\n" |
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"\nScan and list keys matching a regular expression.\n" |
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"\nArguments:\n" |
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"1. \"namespace\" (string) namespace Id\n" |
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"2. \"regexp\" (string, optional) filter keys with this regexp\n" |
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"3. \"maxage\" (numeric, optional, default=36000) only consider names updated in the last \"maxage\" blocks; 0 means all names\n" |
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"4. \"from\" (numeric, optional, default=0) return from this position onward; index starts at 0\n" |
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"5. \"nb\" (numeric, optional, default=0) return only \"nb\" entries; 0 means all\n" |
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"6. \"stat\" (string, optional) if set to the string \"stat\", print statistics instead of returning the names\n" |
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"\nResult:\n" |
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"[\n" |
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+ getKevaInfoHelp (" ", ",") + |
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" ...\n" |
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"]\n" |
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"\nExamples:\n" |
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+ HelpExampleCli ("keva_filter", "\"\" 5") |
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+ HelpExampleCli ("keva_filter", "\"^id/\"") |
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+ HelpExampleCli ("keva_filter", "\"^id/\" 36000 0 0 \"stat\"") |
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+ HelpExampleRpc ("keva_filter", "\"^d/\"") |
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); |
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RPCTypeCheck(request.params, { |
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UniValue::VSTR, UniValue::VSTR, UniValue::VNUM, |
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UniValue::VNUM, UniValue::VNUM, UniValue::VSTR |
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}); |
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if (IsInitialBlockDownload()) { |
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throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, |
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"Kevacoin is downloading blocks..."); |
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} |
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ObserveSafeMode(); |
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/* ********************** */ |
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/* Interpret parameters. */ |
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bool haveRegexp(false); |
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boost::xpressive::sregex regexp; |
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valtype nameSpace; |
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int maxage(36000), from(0), nb(0); |
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bool stats(false); |
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if (request.params.size() >= 1) { |
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const std::string namespaceStr = request.params[0].get_str(); |
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valtype nameSpace; |
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if (!DecodeKevaNamespace(namespaceStr, Params(), nameSpace)) { |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "invalid namespace id"); |
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} |
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} |
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if (request.params.size() >= 2) { |
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haveRegexp = true; |
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regexp = boost::xpressive::sregex::compile (request.params[1].get_str()); |
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} |
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if (request.params.size() >= 3) |
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maxage = request.params[2].get_int(); |
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if (maxage < 0) |
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throw JSONRPCError(RPC_INVALID_PARAMETER, |
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"'maxage' should be non-negative"); |
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if (request.params.size() >= 4) |
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from = request.params[3].get_int (); |
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if (from < 0) |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "'from' should be non-negative"); |
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if (request.params.size() >= 5) |
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nb = request.params[4].get_int (); |
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if (nb < 0) |
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throw JSONRPCError (RPC_INVALID_PARAMETER, "'nb' should be non-negative"); |
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if (request.params.size() >= 6) { |
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if (request.params[5].get_str() != "stat") |
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throw JSONRPCError (RPC_INVALID_PARAMETER, |
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"fifth argument must be the literal string 'stat'"); |
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stats = true; |
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} |
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/* ******************************************* */ |
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/* Iterate over names to build up the result. */ |
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UniValue keys(UniValue::VARR); |
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unsigned count(0); |
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LOCK (cs_main); |
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valtype key; |
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CKevaData data; |
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std::unique_ptr<CKevaIterator> iter(pcoinsTip->IterateKeys(nameSpace)); |
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while (iter->next(key, data)) { |
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const int age = chainActive.Height() - data.getHeight(); |
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assert(age >= 0); |
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if (maxage != 0 && age >= maxage) |
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continue; |
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if (haveRegexp) { |
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const std::string keyStr = ValtypeToString(key); |
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boost::xpressive::smatch matches; |
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if (!boost::xpressive::regex_search(keyStr, matches, regexp)) |
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continue; |
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} |
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if (from > 0) { |
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--from; |
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continue; |
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} |
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assert(from == 0); |
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if (stats) |
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++count; |
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else |
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keys.push_back(getKevaInfo(key, data)); |
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if (nb > 0) { |
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--nb; |
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if (nb == 0) |
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break; |
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} |
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} |
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/* ********************************************************** */ |
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/* Return the correct result (take stats mode into account). */ |
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if (stats) { |
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UniValue res(UniValue::VOBJ); |
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res.pushKV("blocks", chainActive.Height()); |
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res.pushKV("count", static_cast<int>(count)); |
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return res; |
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} |
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return keys; |
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} |
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static const CRPCCommand commands[] = |
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{ // category name actor (function) argNames
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// --------------------- ------------------------ ----------------------- ----------
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{ "kevacoin", "keva_get", &keva_get, {"namespace", "key"} }, |
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{ "kevacoin", "keva_filter", &keva_filter, {"namespace", "regexp", "from", "nb", "stat"} } |
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}; |
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void RegisterKevaRPCCommands(CRPCTable &t) |
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{ |
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for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++) |
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t.appendCommand(commands[vcidx].name, &commands[vcidx]); |
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} |
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