1.1.0

src/rest.cpp

@@ -0,0 +1,678 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2019 The Palladium Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <chain.h>
+#include <chainparams.h>
+#include <core_io.h>
+#include <httpserver.h>
+#include <index/txindex.h>
+#include <node/context.h>
+#include <primitives/block.h>
+#include <primitives/transaction.h>
+#include <rpc/blockchain.h>
+#include <rpc/protocol.h>
+#include <rpc/server.h>
+#include <streams.h>
+#include <sync.h>
+#include <txmempool.h>
+#include <util/check.h>
+#include <util/strencodings.h>
+#include <validation.h>
+#include <version.h>
+
+#include <boost/algorithm/string.hpp>
+
+#include <univalue.h>
+
+static const size_t MAX_GETUTXOS_OUTPOINTS = 15; //allow a max of 15 outpoints to be queried at once
+
+enum class RetFormat {
+    UNDEF,
+    BINARY,
+    HEX,
+    JSON,
+};
+
+static const struct {
+    RetFormat rf;
+    const char* name;
+} rf_names[] = {
+      {RetFormat::UNDEF, ""},
+      {RetFormat::BINARY, "bin"},
+      {RetFormat::HEX, "hex"},
+      {RetFormat::JSON, "json"},
+};
+
+struct CCoin {
+    uint32_t nHeight;
+    CTxOut out;
+
+    ADD_SERIALIZE_METHODS;
+
+    CCoin() : nHeight(0) {}
+    explicit CCoin(Coin&& in) : nHeight(in.nHeight), out(std::move(in.out)) {}
+
+    template <typename Stream, typename Operation>
+    inline void SerializationOp(Stream& s, Operation ser_action)
+    {
+        uint32_t nTxVerDummy = 0;
+        READWRITE(nTxVerDummy);
+        READWRITE(nHeight);
+        READWRITE(out);
+    }
+};
+
+static bool RESTERR(HTTPRequest* req, enum HTTPStatusCode status, std::string message)
+{
+    req->WriteHeader("Content-Type", "text/plain");
+    req->WriteReply(status, message + "\r\n");
+    return false;
+}
+
+/**
+ * Get the node context mempool.
+ *
+ * Set the HTTP error and return nullptr if node context
+ * mempool is not found.
+ *
+ * @param[in]  req the HTTP request
+ * return pointer to the mempool or nullptr if no mempool found
+ */
+static CTxMemPool* GetMemPool(HTTPRequest* req)
+{
+    if (!g_rpc_node || !g_rpc_node->mempool) {
+        RESTERR(req, HTTP_NOT_FOUND, "Mempool disabled or instance not found");
+        return nullptr;
+    }
+    return g_rpc_node->mempool;
+}
+
+static RetFormat ParseDataFormat(std::string& param, const std::string& strReq)
+{
+    const std::string::size_type pos = strReq.rfind('.');
+    if (pos == std::string::npos)
+    {
+        param = strReq;
+        return rf_names[0].rf;
+    }
+
+    param = strReq.substr(0, pos);
+    const std::string suff(strReq, pos + 1);
+
+    for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
+        if (suff == rf_names[i].name)
+            return rf_names[i].rf;
+
+    /* If no suffix is found, return original string.  */
+    param = strReq;
+    return rf_names[0].rf;
+}
+
+static std::string AvailableDataFormatsString()
+{
+    std::string formats;
+    for (unsigned int i = 0; i < ARRAYLEN(rf_names); i++)
+        if (strlen(rf_names[i].name) > 0) {
+            formats.append(".");
+            formats.append(rf_names[i].name);
+            formats.append(", ");
+        }
+
+    if (formats.length() > 0)
+        return formats.substr(0, formats.length() - 2);
+
+    return formats;
+}
+
+static bool CheckWarmup(HTTPRequest* req)
+{
+    std::string statusmessage;
+    if (RPCIsInWarmup(&statusmessage))
+         return RESTERR(req, HTTP_SERVICE_UNAVAILABLE, "Service temporarily unavailable: " + statusmessage);
+    return true;
+}
+
+static bool rest_headers(HTTPRequest* req,
+                         const std::string& strURIPart)
+{
+    if (!CheckWarmup(req))
+        return false;
+    std::string param;
+    const RetFormat rf = ParseDataFormat(param, strURIPart);
+    std::vector<std::string> path;
+    boost::split(path, param, boost::is_any_of("/"));
+
+    if (path.size() != 2)
+        return RESTERR(req, HTTP_BAD_REQUEST, "No header count specified. Use /rest/headers/<count>/<hash>.<ext>.");
+
+    long count = strtol(path[0].c_str(), nullptr, 10);
+    if (count < 1 || count > 2000)
+        return RESTERR(req, HTTP_BAD_REQUEST, "Header count out of range: " + path[0]);
+
+    std::string hashStr = path[1];
+    uint256 hash;
+    if (!ParseHashStr(hashStr, hash))
+        return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
+
+    const CBlockIndex* tip = nullptr;
+    std::vector<const CBlockIndex *> headers;
+    headers.reserve(count);
+    {
+        LOCK(cs_main);
+        tip = ::ChainActive().Tip();
+        const CBlockIndex* pindex = LookupBlockIndex(hash);
+        while (pindex != nullptr && ::ChainActive().Contains(pindex)) {
+            headers.push_back(pindex);
+            if (headers.size() == (unsigned long)count)
+                break;
+            pindex = ::ChainActive().Next(pindex);
+        }
+    }
+
+    switch (rf) {
+    case RetFormat::BINARY: {
+        CDataStream ssHeader(SER_NETWORK, PROTOCOL_VERSION);
+        for (const CBlockIndex *pindex : headers) {
+            ssHeader << pindex->GetBlockHeader();
+        }
+
+        std::string binaryHeader = ssHeader.str();
+        req->WriteHeader("Content-Type", "application/octet-stream");
+        req->WriteReply(HTTP_OK, binaryHeader);
+        return true;
+    }
+
+    case RetFormat::HEX: {
+        CDataStream ssHeader(SER_NETWORK, PROTOCOL_VERSION);
+        for (const CBlockIndex *pindex : headers) {
+            ssHeader << pindex->GetBlockHeader();
+        }
+
+        std::string strHex = HexStr(ssHeader.begin(), ssHeader.end()) + "\n";
+        req->WriteHeader("Content-Type", "text/plain");
+        req->WriteReply(HTTP_OK, strHex);
+        return true;
+    }
+    case RetFormat::JSON: {
+        UniValue jsonHeaders(UniValue::VARR);
+        for (const CBlockIndex *pindex : headers) {
+            jsonHeaders.push_back(blockheaderToJSON(tip, pindex));
+        }
+        std::string strJSON = jsonHeaders.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: .bin, .hex)");
+    }
+    }
+}
+
+static bool rest_block(HTTPRequest* req,
+                       const std::string& strURIPart,
+                       bool showTxDetails)
+{
+    if (!CheckWarmup(req))
+        return false;
+    std::string hashStr;
+    const RetFormat rf = ParseDataFormat(hashStr, strURIPart);
+
+    uint256 hash;
+    if (!ParseHashStr(hashStr, hash))
+        return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
+
+    CBlock block;
+    CBlockIndex* pblockindex = nullptr;
+    CBlockIndex* tip = nullptr;
+    {
+        LOCK(cs_main);
+        tip = ::ChainActive().Tip();
+        pblockindex = LookupBlockIndex(hash);
+        if (!pblockindex) {
+            return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
+        }
+
+        if (IsBlockPruned(pblockindex))
+            return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not available (pruned data)");
+
+        if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus()))
+            return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
+    }
+
+    switch (rf) {
+    case RetFormat::BINARY: {
+        CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
+        ssBlock << block;
+        std::string binaryBlock = ssBlock.str();
+        req->WriteHeader("Content-Type", "application/octet-stream");
+        req->WriteReply(HTTP_OK, binaryBlock);
+        return true;
+    }
+
+    case RetFormat::HEX: {
+        CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
+        ssBlock << block;
+        std::string strHex = HexStr(ssBlock.begin(), ssBlock.end()) + "\n";
+        req->WriteHeader("Content-Type", "text/plain");
+        req->WriteReply(HTTP_OK, strHex);
+        return true;
+    }
+
+    case RetFormat::JSON: {
+        UniValue objBlock = blockToJSON(block, tip, pblockindex, showTxDetails);
+        std::string strJSON = objBlock.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 bool rest_block_extended(HTTPRequest* req, const std::string& strURIPart)
+{
+    return rest_block(req, strURIPart, true);
+}
+
+static bool rest_block_notxdetails(HTTPRequest* req, const std::string& strURIPart)
+{
+    return rest_block(req, strURIPart, false);
+}
+
+// A bit of a hack - dependency on a function defined in rpc/blockchain.cpp
+UniValue getblockchaininfo(const JSONRPCRequest& request);
+
+static bool rest_chaininfo(HTTPRequest* req, const std::string& strURIPart)
+{
+    if (!CheckWarmup(req))
+        return false;
+    std::string param;
+    const RetFormat rf = ParseDataFormat(param, strURIPart);
+
+    switch (rf) {
+    case RetFormat::JSON: {
+        JSONRPCRequest jsonRequest;
+        jsonRequest.params = UniValue(UniValue::VARR);
+        UniValue chainInfoObject = getblockchaininfo(jsonRequest);
+        std::string strJSON = chainInfoObject.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: json)");
+    }
+    }
+}
+
+static bool rest_mempool_info(HTTPRequest* req, const std::string& strURIPart)
+{
+    if (!CheckWarmup(req))
+        return false;
+    const CTxMemPool* mempool = GetMemPool(req);
+    if (!mempool) return false;
+    std::string param;
+    const RetFormat rf = ParseDataFormat(param, strURIPart);
+
+    switch (rf) {
+    case RetFormat::JSON: {
+        UniValue mempoolInfoObject = MempoolInfoToJSON(*mempool);
+
+        std::string strJSON = mempoolInfoObject.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: json)");
+    }
+    }
+}
+
+static bool rest_mempool_contents(HTTPRequest* req, const std::string& strURIPart)
+{
+    if (!CheckWarmup(req)) return false;
+    const CTxMemPool* mempool = GetMemPool(req);
+    if (!mempool) return false;
+    std::string param;
+    const RetFormat rf = ParseDataFormat(param, strURIPart);
+
+    switch (rf) {
+    case RetFormat::JSON: {
+        UniValue mempoolObject = MempoolToJSON(*mempool, true);
+
+        std::string strJSON = mempoolObject.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: json)");
+    }
+    }
+}
+
+static bool rest_tx(HTTPRequest* req, const std::string& strURIPart)
+{
+    if (!CheckWarmup(req))
+        return false;
+    std::string hashStr;
+    const RetFormat rf = ParseDataFormat(hashStr, strURIPart);
+
+    uint256 hash;
+    if (!ParseHashStr(hashStr, hash))
+        return RESTERR(req, HTTP_BAD_REQUEST, "Invalid hash: " + hashStr);
+
+    if (g_txindex) {
+        g_txindex->BlockUntilSyncedToCurrentChain();
+    }
+
+    CTransactionRef tx;
+    uint256 hashBlock = uint256();
+    if (!GetTransaction(hash, tx, Params().GetConsensus(), hashBlock))
+        return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
+
+    switch (rf) {
+    case RetFormat::BINARY: {
+        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
+        ssTx << tx;
+
+        std::string binaryTx = ssTx.str();
+        req->WriteHeader("Content-Type", "application/octet-stream");
+        req->WriteReply(HTTP_OK, binaryTx);
+        return true;
+    }
+
+    case RetFormat::HEX: {
+        CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION | RPCSerializationFlags());
+        ssTx << tx;
+
+        std::string strHex = HexStr(ssTx.begin(), ssTx.end()) + "\n";
+        req->WriteHeader("Content-Type", "text/plain");
+        req->WriteReply(HTTP_OK, strHex);
+        return true;
+    }
+
+    case RetFormat::JSON: {
+        UniValue objTx(UniValue::VOBJ);
+        TxToUniv(*tx, hashBlock, objTx);
+        std::string strJSON = objTx.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 bool rest_getutxos(HTTPRequest* req, const std::string& strURIPart)
+{
+    if (!CheckWarmup(req))
+        return false;
+    std::string param;
+    const RetFormat rf = ParseDataFormat(param, strURIPart);
+
+    std::vector<std::string> uriParts;
+    if (param.length() > 1)
+    {
+        std::string strUriParams = param.substr(1);
+        boost::split(uriParts, strUriParams, boost::is_any_of("/"));
+    }
+
+    // throw exception in case of an empty request
+    std::string strRequestMutable = req->ReadBody();
+    if (strRequestMutable.length() == 0 && uriParts.size() == 0)
+        return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
+
+    bool fInputParsed = false;
+    bool fCheckMemPool = false;
+    std::vector<COutPoint> vOutPoints;
+
+    // parse/deserialize input
+    // input-format = output-format, rest/getutxos/bin requires binary input, gives binary output, ...
+
+    if (uriParts.size() > 0)
+    {
+        //inputs is sent over URI scheme (/rest/getutxos/checkmempool/txid1-n/txid2-n/...)
+        if (uriParts[0] == "checkmempool") fCheckMemPool = true;
+
+        for (size_t i = (fCheckMemPool) ? 1 : 0; i < uriParts.size(); i++)
+        {
+            uint256 txid;
+            int32_t nOutput;
+            std::string strTxid = uriParts[i].substr(0, uriParts[i].find('-'));
+            std::string strOutput = uriParts[i].substr(uriParts[i].find('-')+1);
+
+            if (!ParseInt32(strOutput, &nOutput) || !IsHex(strTxid))
+                return RESTERR(req, HTTP_BAD_REQUEST, "Parse error");
+
+            txid.SetHex(strTxid);
+            vOutPoints.push_back(COutPoint(txid, (uint32_t)nOutput));
+        }
+
+        if (vOutPoints.size() > 0)
+            fInputParsed = true;
+        else
+            return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
+    }
+
+    switch (rf) {
+    case RetFormat::HEX: {
+        // convert hex to bin, continue then with bin part
+        std::vector<unsigned char> strRequestV = ParseHex(strRequestMutable);
+        strRequestMutable.assign(strRequestV.begin(), strRequestV.end());
+    }
+
+    case RetFormat::BINARY: {
+        try {
+            //deserialize only if user sent a request
+            if (strRequestMutable.size() > 0)
+            {
+                if (fInputParsed) //don't allow sending input over URI and HTTP RAW DATA
+                    return RESTERR(req, HTTP_BAD_REQUEST, "Combination of URI scheme inputs and raw post data is not allowed");
+
+                CDataStream oss(SER_NETWORK, PROTOCOL_VERSION);
+                oss << strRequestMutable;
+                oss >> fCheckMemPool;
+                oss >> vOutPoints;
+            }
+        } catch (const std::ios_base::failure&) {
+            // abort in case of unreadable binary data
+            return RESTERR(req, HTTP_BAD_REQUEST, "Parse error");
+        }
+        break;
+    }
+
+    case RetFormat::JSON: {
+        if (!fInputParsed)
+            return RESTERR(req, HTTP_BAD_REQUEST, "Error: empty request");
+        break;
+    }
+    default: {
+        return RESTERR(req, HTTP_NOT_FOUND, "output format not found (available: " + AvailableDataFormatsString() + ")");
+    }
+    }
+
+    // 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) {
+            const CTxMemPool* mempool = GetMemPool(req);
+            if (!mempool) return false;
+            // use db+mempool as cache backend in case user likes to query mempool
+            LOCK2(cs_main, mempool->cs);
+            CCoinsViewCache& viewChain = ::ChainstateActive().CoinsTip();
+            CCoinsViewMemPool viewMempool(&viewChain, *mempool);
+            process_utxos(viewMempool, *mempool);
+        } else {
+            LOCK(cs_main);  // no need to lock mempool!
+            process_utxos(::ChainstateActive().CoinsTip(), 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 bool rest_blockhash_by_height(HTTPRequest* req,
+                       const std::string& str_uri_part)
+{
+    if (!CheckWarmup(req)) return false;
+    std::string height_str;
+    const RetFormat rf = ParseDataFormat(height_str, str_uri_part);
+
+    int32_t blockheight;
+    if (!ParseInt32(height_str, &blockheight) || blockheight < 0) {
+        return RESTERR(req, HTTP_BAD_REQUEST, "Invalid height: " + SanitizeString(height_str));
+    }
+
+    CBlockIndex* pblockindex = nullptr;
+    {
+        LOCK(cs_main);
+        if (blockheight > ::ChainActive().Height()) {
+            return RESTERR(req, HTTP_NOT_FOUND, "Block height out of range");
+        }
+        pblockindex = ::ChainActive()[blockheight];
+    }
+    switch (rf) {
+    case RetFormat::BINARY: {
+        CDataStream ss_blockhash(SER_NETWORK, PROTOCOL_VERSION);
+        ss_blockhash << pblockindex->GetBlockHash();
+        req->WriteHeader("Content-Type", "application/octet-stream");
+        req->WriteReply(HTTP_OK, ss_blockhash.str());
+        return true;
+    }
+    case RetFormat::HEX: {
+        req->WriteHeader("Content-Type", "text/plain");
+        req->WriteReply(HTTP_OK, pblockindex->GetBlockHash().GetHex() + "\n");
+        return true;
+    }
+    case RetFormat::JSON: {
+        req->WriteHeader("Content-Type", "application/json");
+        UniValue resp = UniValue(UniValue::VOBJ);
+        resp.pushKV("blockhash", pblockindex->GetBlockHash().GetHex());
+        req->WriteReply(HTTP_OK, resp.write() + "\n");
+        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},
+      {"/rest/blockhashbyheight/", rest_blockhash_by_height},
+};
+
+void StartREST()
+{
+    for (unsigned int i = 0; i < ARRAYLEN(uri_prefixes); i++)
+        RegisterHTTPHandler(uri_prefixes[i].prefix, false, uri_prefixes[i].handler);
+}
+
+void InterruptREST()
+{
+}
+
+void StopREST()
+{
+    for (unsigned int i = 0; i < ARRAYLEN(uri_prefixes); i++)
+        UnregisterHTTPHandler(uri_prefixes[i].prefix, false);
+}