ac898b689c
9cb9af8[REST] Handle UTXO retrieval when ignoring the mempool (Roman Zeyde)1fdc7c4Make CTxMemPool::isSpent() const (Roman Zeyde) Pull request description: Current REST API always returns empty UTXO when invoked without `/checkmempool/` URL part. After the fix: ``` $ curl -s http://localhost:8332/rest/getutxos/0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098-0.json | jq { "chainHeight": 514109, "chaintipHash": "0000000000000000001fe76d1445e8a6432fd2de04261dc9c5915311dc7ad6de", "bitmap": "1", "utxos": [ { "height": 1, "value": 50, "scriptPubKey": { "asm": "0496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858ee OP_CHECKSIG", "hex": "410496b538e853519c726a2c91e61ec11600ae1390813a627c66fb8be7947be63c52da7589379515d4e0a604f8141781e62294721166bf621e73a82cbf2342c858eeac", "reqSigs": 1, "type": "pubkey", "addresses": [ "12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX" ] } } ] } ``` Before the fix: ``` $ curl -s http://localhost:8332/rest/getutxos/0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098-0.json | jq { "chainHeight": 514109, "chaintipHash": "0000000000000000001fe76d1445e8a6432fd2de04261dc9c5915311dc7ad6de", "bitmap": "0", "utxos": [] } ``` Tree-SHA512: 994a350cb34a3c8f5a7afbc169c6b177c5be6cf223b2071c62d63644819d416d3e10d1c58b244d9d351bae7233d2974aa5e9ebadd1b5d6218f5245558675be0d
604 lines
19 KiB
C++
604 lines
19 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2017 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 <chain.h>
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#include <chainparams.h>
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#include <core_io.h>
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#include <primitives/block.h>
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#include <primitives/transaction.h>
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#include <validation.h>
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#include <httpserver.h>
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#include <rpc/blockchain.h>
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#include <rpc/server.h>
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#include <streams.h>
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#include <sync.h>
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#include <txmempool.h>
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#include <utilstrencodings.h>
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#include <version.h>
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#include <boost/algorithm/string.hpp>
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#include <univalue.h>
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static const size_t MAX_GETUTXOS_OUTPOINTS = 15; //allow a max of 15 outpoints to be queried at once
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enum class RetFormat {
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UNDEF,
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BINARY,
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HEX,
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JSON,
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};
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static const struct {
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enum RetFormat rf;
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const char* name;
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} rf_names[] = {
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{RetFormat::UNDEF, ""},
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{RetFormat::BINARY, "bin"},
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{RetFormat::HEX, "hex"},
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{RetFormat::JSON, "json"},
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};
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struct CCoin {
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uint32_t nHeight;
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CTxOut out;
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ADD_SERIALIZE_METHODS;
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CCoin() : nHeight(0) {}
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explicit CCoin(Coin&& in) : nHeight(in.nHeight), out(std::move(in.out)) {}
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template <typename Stream, typename Operation>
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inline void SerializationOp(Stream& s, Operation ser_action)
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{
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uint32_t nTxVerDummy = 0;
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READWRITE(nTxVerDummy);
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READWRITE(nHeight);
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READWRITE(out);
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}
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};
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static bool RESTERR(HTTPRequest* req, enum HTTPStatusCode status, std::string message)
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{
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req->WriteHeader("Content-Type", "text/plain");
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req->WriteReply(status, message + "\r\n");
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return false;
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}
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static enum RetFormat ParseDataFormat(std::string& param, const std::string& strReq)
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{
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const std::string::size_type pos = strReq.rfind('.');
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if (pos == std::string::npos)
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{
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param = strReq;
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return rf_names[0].rf;
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}
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param = strReq.substr(0, pos);
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const std::string suff(strReq, pos + 1);
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for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
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if (suff == rf_names[i].name)
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return rf_names[i].rf;
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/* If no suffix is found, return original string. */
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param = strReq;
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return rf_names[0].rf;
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}
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static std::string AvailableDataFormatsString()
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{
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std::string formats;
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for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
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if (strlen(rf_names[i].name) > 0) {
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formats.append(".");
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formats.append(rf_names[i].name);
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formats.append(", ");
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}
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if (formats.length() > 0)
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return formats.substr(0, formats.length() - 2);
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return formats;
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}
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static bool ParseHashStr(const std::string& strReq, uint256& v)
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{
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if (!IsHex(strReq) || (strReq.size() != 64))
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return false;
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v.SetHex(strReq);
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return true;
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}
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static bool CheckWarmup(HTTPRequest* req)
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{
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std::string statusmessage;
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if (RPCIsInWarmup(&statusmessage))
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return RESTERR(req, HTTP_SERVICE_UNAVAILABLE, "Service temporarily unavailable: " + statusmessage);
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return true;
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}
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static bool rest_headers(HTTPRequest* req,
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const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string param;
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const RetFormat rf = ParseDataFormat(param, strURIPart);
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std::vector<std::string> path;
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boost::split(path, param, boost::is_any_of("/"));
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if (path.size() != 2)
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return RESTERR(req, HTTP_BAD_REQUEST, "No header count specified. Use /rest/headers/<count>/<hash>.<ext>.");
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long count = strtol(path[0].c_str(), nullptr, 10);
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if (count < 1 || count > 2000)
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return RESTERR(req, HTTP_BAD_REQUEST, "Header count out of range: " + path[0]);
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std::string hashStr = path[1];
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uint256 hash;
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if (!ParseHashStr(hashStr, hash))
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return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
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std::vector<const CBlockIndex *> headers;
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headers.reserve(count);
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{
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LOCK(cs_main);
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const CBlockIndex* pindex = LookupBlockIndex(hash);
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while (pindex != nullptr && chainActive.Contains(pindex)) {
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headers.push_back(pindex);
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if (headers.size() == (unsigned long)count)
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break;
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pindex = chainActive.Next(pindex);
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}
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}
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CDataStream ssHeader(SER_NETWORK, PROTOCOL_VERSION);
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for (const CBlockIndex *pindex : headers) {
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ssHeader << pindex->GetBlockHeader();
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}
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switch (rf) {
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case RetFormat::BINARY: {
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std::string binaryHeader = ssHeader.str();
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req->WriteHeader("Content-Type", "application/octet-stream");
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req->WriteReply(HTTP_OK, binaryHeader);
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return true;
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}
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case RetFormat::HEX: {
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std::string strHex = HexStr(ssHeader.begin(), ssHeader.end()) + "\n";
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req->WriteHeader("Content-Type", "text/plain");
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req->WriteReply(HTTP_OK, strHex);
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return true;
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}
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case RetFormat::JSON: {
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UniValue jsonHeaders(UniValue::VARR);
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{
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LOCK(cs_main);
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for (const CBlockIndex *pindex : headers) {
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jsonHeaders.push_back(blockheaderToJSON(pindex));
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}
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}
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std::string strJSON = jsonHeaders.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: .bin, .hex)");
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}
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}
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}
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static bool rest_block(HTTPRequest* req,
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const std::string& strURIPart,
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bool showTxDetails)
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{
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if (!CheckWarmup(req))
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return false;
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std::string hashStr;
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const RetFormat rf = ParseDataFormat(hashStr, strURIPart);
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uint256 hash;
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if (!ParseHashStr(hashStr, hash))
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return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
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CBlock block;
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CBlockIndex* pblockindex = nullptr;
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{
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LOCK(cs_main);
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pblockindex = LookupBlockIndex(hash);
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if (!pblockindex) {
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return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
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}
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if (fHavePruned && !(pblockindex->nStatus & BLOCK_HAVE_DATA) && pblockindex->nTx > 0)
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return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not available (pruned data)");
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if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus()))
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return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
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}
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CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
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ssBlock << block;
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switch (rf) {
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case RetFormat::BINARY: {
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std::string binaryBlock = ssBlock.str();
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req->WriteHeader("Content-Type", "application/octet-stream");
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req->WriteReply(HTTP_OK, binaryBlock);
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return true;
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}
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case RetFormat::HEX: {
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std::string strHex = HexStr(ssBlock.begin(), ssBlock.end()) + "\n";
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req->WriteHeader("Content-Type", "text/plain");
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req->WriteReply(HTTP_OK, strHex);
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return true;
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}
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case RetFormat::JSON: {
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UniValue objBlock;
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{
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LOCK(cs_main);
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objBlock = blockToJSON(block, pblockindex, showTxDetails);
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}
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std::string strJSON = objBlock.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
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}
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}
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}
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static bool rest_block_extended(HTTPRequest* req, const std::string& strURIPart)
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{
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return rest_block(req, strURIPart, true);
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}
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static bool rest_block_notxdetails(HTTPRequest* req, const std::string& strURIPart)
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{
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return rest_block(req, strURIPart, false);
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}
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// A bit of a hack - dependency on a function defined in rpc/blockchain.cpp
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UniValue getblockchaininfo(const JSONRPCRequest& request);
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static bool rest_chaininfo(HTTPRequest* req, const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string param;
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const RetFormat rf = ParseDataFormat(param, strURIPart);
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switch (rf) {
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case RetFormat::JSON: {
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JSONRPCRequest jsonRequest;
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jsonRequest.params = UniValue(UniValue::VARR);
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UniValue chainInfoObject = getblockchaininfo(jsonRequest);
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std::string strJSON = chainInfoObject.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: json)");
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}
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}
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}
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static bool rest_mempool_info(HTTPRequest* req, const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string param;
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const RetFormat rf = ParseDataFormat(param, strURIPart);
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switch (rf) {
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case RetFormat::JSON: {
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UniValue mempoolInfoObject = mempoolInfoToJSON();
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std::string strJSON = mempoolInfoObject.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: json)");
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}
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}
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}
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static bool rest_mempool_contents(HTTPRequest* req, const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string param;
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const RetFormat rf = ParseDataFormat(param, strURIPart);
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switch (rf) {
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case RetFormat::JSON: {
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UniValue mempoolObject = mempoolToJSON(true);
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std::string strJSON = mempoolObject.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: json)");
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}
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}
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}
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static bool rest_tx(HTTPRequest* req, const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string hashStr;
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const RetFormat rf = ParseDataFormat(hashStr, strURIPart);
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uint256 hash;
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if (!ParseHashStr(hashStr, hash))
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return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
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CTransactionRef tx;
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uint256 hashBlock = uint256();
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if (!GetTransaction(hash, tx, Params().GetConsensus(), hashBlock, true))
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return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
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CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
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ssTx << tx;
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switch (rf) {
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case RetFormat::BINARY: {
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std::string binaryTx = ssTx.str();
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req->WriteHeader("Content-Type", "application/octet-stream");
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req->WriteReply(HTTP_OK, binaryTx);
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return true;
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}
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case RetFormat::HEX: {
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std::string strHex = HexStr(ssTx.begin(), ssTx.end()) + "\n";
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req->WriteHeader("Content-Type", "text/plain");
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req->WriteReply(HTTP_OK, strHex);
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return true;
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}
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case RetFormat::JSON: {
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UniValue objTx(UniValue::VOBJ);
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TxToUniv(*tx, hashBlock, objTx);
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std::string strJSON = objTx.write() + "\n";
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req->WriteHeader("Content-Type", "application/json");
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req->WriteReply(HTTP_OK, strJSON);
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return true;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
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}
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}
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}
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static bool rest_getutxos(HTTPRequest* req, const std::string& strURIPart)
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{
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if (!CheckWarmup(req))
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return false;
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std::string param;
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const RetFormat rf = ParseDataFormat(param, strURIPart);
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std::vector<std::string> uriParts;
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if (param.length() > 1)
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{
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std::string strUriParams = param.substr(1);
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boost::split(uriParts, strUriParams, boost::is_any_of("/"));
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}
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// throw exception in case of an empty request
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std::string strRequestMutable = req->ReadBody();
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if (strRequestMutable.length() == 0 && uriParts.size() == 0)
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return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
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bool fInputParsed = false;
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bool fCheckMemPool = false;
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std::vector<COutPoint> vOutPoints;
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// parse/deserialize input
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// input-format = output-format, rest/getutxos/bin requires binary input, gives binary output, ...
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if (uriParts.size() > 0)
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{
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//inputs is sent over URI scheme (/rest/getutxos/checkmempool/txid1-n/txid2-n/...)
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if (uriParts[0] == "checkmempool") fCheckMemPool = true;
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for (size_t i = (fCheckMemPool) ? 1 : 0; i < uriParts.size(); i++)
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{
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uint256 txid;
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int32_t nOutput;
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std::string strTxid = uriParts[i].substr(0, uriParts[i].find('-'));
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std::string strOutput = uriParts[i].substr(uriParts[i].find('-')+1);
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if (!ParseInt32(strOutput, &nOutput) || !IsHex(strTxid))
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return RESTERR(req, HTTP_BAD_REQUEST, "Parse error");
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txid.SetHex(strTxid);
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vOutPoints.push_back(COutPoint(txid, (uint32_t)nOutput));
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}
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if (vOutPoints.size() > 0)
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fInputParsed = true;
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else
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return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
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}
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switch (rf) {
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case RetFormat::HEX: {
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// convert hex to bin, continue then with bin part
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std::vector<unsigned char> strRequestV = ParseHex(strRequestMutable);
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strRequestMutable.assign(strRequestV.begin(), strRequestV.end());
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}
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case RetFormat::BINARY: {
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try {
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//deserialize only if user sent a request
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if (strRequestMutable.size() > 0)
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{
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if (fInputParsed) //don't allow sending input over URI and HTTP RAW DATA
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return RESTERR(req, HTTP_BAD_REQUEST, "Combination of URI scheme inputs and raw post data is not allowed");
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CDataStream oss(SER_NETWORK, PROTOCOL_VERSION);
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oss << strRequestMutable;
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oss >> fCheckMemPool;
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oss >> vOutPoints;
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}
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} catch (const std::ios_base::failure& e) {
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// abort in case of unreadable binary data
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return RESTERR(req, HTTP_BAD_REQUEST, "Parse error");
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}
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break;
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}
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case RetFormat::JSON: {
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if (!fInputParsed)
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return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
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break;
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}
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default: {
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return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
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}
|
|
}
|
|
|
|
// limit max outpoints
|
|
if (vOutPoints.size() > MAX_GETUTXOS_OUTPOINTS)
|
|
return RESTERR(req, HTTP_BAD_REQUEST, strprintf("Error: max outpoints exceeded (max: %d, tried: %d)", MAX_GETUTXOS_OUTPOINTS, vOutPoints.size()));
|
|
|
|
// check spentness and form a bitmap (as well as a JSON capable human-readable string representation)
|
|
std::vector<unsigned char> bitmap;
|
|
std::vector<CCoin> outs;
|
|
std::string bitmapStringRepresentation;
|
|
std::vector<bool> hits;
|
|
bitmap.resize((vOutPoints.size() + 7) / 8);
|
|
{
|
|
auto process_utxos = [&vOutPoints, &outs, &hits](const CCoinsView& view, const CTxMemPool& mempool) {
|
|
for (const COutPoint& vOutPoint : vOutPoints) {
|
|
Coin coin;
|
|
bool hit = !mempool.isSpent(vOutPoint) && view.GetCoin(vOutPoint, coin);
|
|
hits.push_back(hit);
|
|
if (hit) outs.emplace_back(std::move(coin));
|
|
}
|
|
};
|
|
|
|
if (fCheckMemPool) {
|
|
// use db+mempool as cache backend in case user likes to query mempool
|
|
LOCK2(cs_main, mempool.cs);
|
|
CCoinsViewCache& viewChain = *pcoinsTip;
|
|
CCoinsViewMemPool viewMempool(&viewChain, mempool);
|
|
process_utxos(viewMempool, mempool);
|
|
} else {
|
|
LOCK(cs_main); // no need to lock mempool!
|
|
process_utxos(*pcoinsTip, CTxMemPool());
|
|
}
|
|
|
|
for (size_t i = 0; i < hits.size(); ++i) {
|
|
const bool hit = hits[i];
|
|
bitmapStringRepresentation.append(hit ? "1" : "0"); // form a binary string representation (human-readable for json output)
|
|
bitmap[i / 8] |= ((uint8_t)hit) << (i % 8);
|
|
}
|
|
}
|
|
|
|
switch (rf) {
|
|
case RetFormat::BINARY: {
|
|
// serialize data
|
|
// use exact same output as mentioned in Bip64
|
|
CDataStream ssGetUTXOResponse(SER_NETWORK, PROTOCOL_VERSION);
|
|
ssGetUTXOResponse << chainActive.Height() << chainActive.Tip()->GetBlockHash() << bitmap << outs;
|
|
std::string ssGetUTXOResponseString = ssGetUTXOResponse.str();
|
|
|
|
req->WriteHeader("Content-Type", "application/octet-stream");
|
|
req->WriteReply(HTTP_OK, ssGetUTXOResponseString);
|
|
return true;
|
|
}
|
|
|
|
case RetFormat::HEX: {
|
|
CDataStream ssGetUTXOResponse(SER_NETWORK, PROTOCOL_VERSION);
|
|
ssGetUTXOResponse << chainActive.Height() << chainActive.Tip()->GetBlockHash() << bitmap << outs;
|
|
std::string strHex = HexStr(ssGetUTXOResponse.begin(), ssGetUTXOResponse.end()) + "\n";
|
|
|
|
req->WriteHeader("Content-Type", "text/plain");
|
|
req->WriteReply(HTTP_OK, strHex);
|
|
return true;
|
|
}
|
|
|
|
case RetFormat::JSON: {
|
|
UniValue objGetUTXOResponse(UniValue::VOBJ);
|
|
|
|
// pack in some essentials
|
|
// use more or less the same output as mentioned in Bip64
|
|
objGetUTXOResponse.pushKV("chainHeight", chainActive.Height());
|
|
objGetUTXOResponse.pushKV("chaintipHash", chainActive.Tip()->GetBlockHash().GetHex());
|
|
objGetUTXOResponse.pushKV("bitmap", bitmapStringRepresentation);
|
|
|
|
UniValue utxos(UniValue::VARR);
|
|
for (const CCoin& coin : outs) {
|
|
UniValue utxo(UniValue::VOBJ);
|
|
utxo.pushKV("height", (int32_t)coin.nHeight);
|
|
utxo.pushKV("value", ValueFromAmount(coin.out.nValue));
|
|
|
|
// include the script in a json output
|
|
UniValue o(UniValue::VOBJ);
|
|
ScriptPubKeyToUniv(coin.out.scriptPubKey, o, true);
|
|
utxo.pushKV("scriptPubKey", o);
|
|
utxos.push_back(utxo);
|
|
}
|
|
objGetUTXOResponse.pushKV("utxos", utxos);
|
|
|
|
// return json string
|
|
std::string strJSON = objGetUTXOResponse.write() + "\n";
|
|
req->WriteHeader("Content-Type", "application/json");
|
|
req->WriteReply(HTTP_OK, strJSON);
|
|
return true;
|
|
}
|
|
default: {
|
|
return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
|
|
}
|
|
}
|
|
}
|
|
|
|
static const struct {
|
|
const char* prefix;
|
|
bool (*handler)(HTTPRequest* req, const std::string& strReq);
|
|
} uri_prefixes[] = {
|
|
{"/rest/tx/", rest_tx},
|
|
{"/rest/block/notxdetails/", rest_block_notxdetails},
|
|
{"/rest/block/", rest_block_extended},
|
|
{"/rest/chaininfo", rest_chaininfo},
|
|
{"/rest/mempool/info", rest_mempool_info},
|
|
{"/rest/mempool/contents", rest_mempool_contents},
|
|
{"/rest/headers/", rest_headers},
|
|
{"/rest/getutxos", rest_getutxos},
|
|
};
|
|
|
|
bool StartREST()
|
|
{
|
|
for (unsigned int i = 0; i < ARRAYLEN(uri_prefixes); i++)
|
|
RegisterHTTPHandler(uri_prefixes[i].prefix, false, uri_prefixes[i].handler);
|
|
return true;
|
|
}
|
|
|
|
void InterruptREST()
|
|
{
|
|
}
|
|
|
|
void StopREST()
|
|
{
|
|
for (unsigned int i = 0; i < ARRAYLEN(uri_prefixes); i++)
|
|
UnregisterHTTPHandler(uri_prefixes[i].prefix, false);
|
|
}
|