Merge pull request #936 from luke-jr/gmp_bip

BIP22: getblocktemplate

1 files changed, 93 insertions, 18 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 2e3f8a8e5b..208c830aa9 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -1923,24 +1923,43 @@ Value getwork(const Array& params, bool fHelp)
 }
 
 
-Value getmemorypool(const Array& params, bool fHelp)
+Value getblocktemplate(const Array& params, bool fHelp)
 {
-    if (fHelp || params.size() > 1)
+    if (fHelp || params.size() != 1)
         throw runtime_error(
-            "getmemorypool [data]\n"
-            "If [data] is not specified, returns data needed to construct a block to work on:\n"
+            "getblocktemplate [params]\n"
+            "If [params] does not contain a \"data\" key, returns data needed to construct a block to work on:\n"
             "  \"version\" : block version\n"
             "  \"previousblockhash\" : hash of current highest block\n"
             "  \"transactions\" : contents of non-coinbase transactions that should be included in the next block\n"
+            "  \"coinbaseaux\" : data that should be included in coinbase\n"
             "  \"coinbasevalue\" : maximum allowable input to coinbase transaction, including the generation award and transaction fees\n"
-            "  \"coinbaseflags\" : data that should be included in coinbase so support for new features can be judged\n"
-            "  \"time\" : timestamp appropriate for next block\n"
+            "  \"target\" : hash target\n"
             "  \"mintime\" : minimum timestamp appropriate for next block\n"
             "  \"curtime\" : current timestamp\n"
+            "  \"mutable\" : list of ways the block template may be changed\n"
+            "  \"noncerange\" : range of valid nonces\n"
+            "  \"sigoplimit\" : limit of sigops in blocks\n"
+            "  \"sizelimit\" : limit of block size\n"
             "  \"bits\" : compressed target of next block\n"
-            "If [data] is specified, tries to solve the block and returns true if it was successful.");
+            "  \"height\" : height of the next block\n"
+            "If [params] does contain a \"data\" key, tries to solve the block and returns null if it was successful (and \"rejected\" if not)\n"
+            "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.");
 
-    if (params.size() == 0)
+    const Object& oparam = params[0].get_obj();
+    std::string strMode;
+    {
+        const Value& modeval = find_value(oparam, "mode");
+        if (modeval.type() == str_type)
+            strMode = modeval.get_str();
+        else
+        if (find_value(oparam, "data").type() == null_type)
+            strMode = "template";
+        else
+            strMode = "submit";
+    }
+
+    if (strMode == "template")
     {
         if (vNodes.empty())
             throw JSONRPCError(-9, "Bitcoin is not connected!");
@@ -1985,38 +2004,93 @@ Value getmemorypool(const Array& params, bool fHelp)
         pblock->nNonce = 0;
 
         Array transactions;
-        BOOST_FOREACH(CTransaction tx, pblock->vtx) {
-            if(tx.IsCoinBase())
+        map<uint256, int64_t> setTxIndex;
+        int i = 0;
+        CTxDB txdb("r");
+        BOOST_FOREACH (CTransaction& tx, pblock->vtx)
+        {
+            uint256 txHash = tx.GetHash();
+            setTxIndex[txHash] = i++;
+
+            if (tx.IsCoinBase())
                 continue;
 
+            Object entry;
+
             CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
             ssTx << tx;
+            entry.push_back(Pair("data", HexStr(ssTx.begin(), ssTx.end())));
 
-            transactions.push_back(HexStr(ssTx.begin(), ssTx.end()));
+            entry.push_back(Pair("hash", txHash.GetHex()));
+
+            MapPrevTx mapInputs;
+            map<uint256, CTxIndex> mapUnused;
+            bool fInvalid = false;
+            if (tx.FetchInputs(txdb, mapUnused, false, false, mapInputs, fInvalid))
+            {
+                entry.push_back(Pair("fee", (int64_t)(tx.GetValueIn(mapInputs) - tx.GetValueOut())));
+
+                Array deps;
+                BOOST_FOREACH (MapPrevTx::value_type& inp, mapInputs)
+                {
+                    if (setTxIndex.count(inp.first))
+                        deps.push_back(setTxIndex[inp.first]);
+                }
+                entry.push_back(Pair("depends", deps));
+
+                int64_t nSigOps = tx.GetLegacySigOpCount();
+                nSigOps += tx.GetP2SHSigOpCount(mapInputs);
+                entry.push_back(Pair("sigops", nSigOps));
+            }
+
+            transactions.push_back(entry);
+        }
+
+        Object aux;
+        aux.push_back(Pair("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
+
+        uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
+
+        static Array aMutable;
+        if (aMutable.empty())
+        {
+            aMutable.push_back("time");
+            aMutable.push_back("transactions");
+            aMutable.push_back("prevblock");
         }
 
         Object result;
         result.push_back(Pair("version", pblock->nVersion));
         result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
         result.push_back(Pair("transactions", transactions));
+        result.push_back(Pair("coinbaseaux", aux));
         result.push_back(Pair("coinbasevalue", (int64_t)pblock->vtx[0].vout[0].nValue));
-        result.push_back(Pair("coinbaseflags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())));
-        result.push_back(Pair("time", (int64_t)pblock->nTime));
+        result.push_back(Pair("target", hashTarget.GetHex()));
         result.push_back(Pair("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1));
-        result.push_back(Pair("curtime", (int64_t)GetAdjustedTime()));
+        result.push_back(Pair("mutable", aMutable));
+        result.push_back(Pair("noncerange", "00000000ffffffff"));
+        result.push_back(Pair("sigoplimit", (int64_t)MAX_BLOCK_SIGOPS));
+        result.push_back(Pair("sizelimit", (int64_t)MAX_BLOCK_SIZE));
+        result.push_back(Pair("curtime", (int64_t)pblock->nTime));
         result.push_back(Pair("bits", HexBits(pblock->nBits)));
+        result.push_back(Pair("height", (int64_t)(pindexPrev->nHeight+1)));
 
         return result;
     }
     else
+    if (strMode == "submit")
     {
         // Parse parameters
-        CDataStream ssBlock(ParseHex(params[0].get_str()), SER_NETWORK, PROTOCOL_VERSION);
+        CDataStream ssBlock(ParseHex(find_value(oparam, "data").get_str()), SER_NETWORK, PROTOCOL_VERSION);
         CBlock pblock;
         ssBlock >> pblock;
 
-        return ProcessBlock(NULL, &pblock);
+        bool fAccepted = ProcessBlock(NULL, &pblock);
+
+        return fAccepted ? Value::null : "rejected";
     }
+
+    throw JSONRPCError(-8, "Invalid mode");
 }
 
 Value getrawmempool(const Array& params, bool fHelp)
@@ -2128,7 +2202,7 @@ static const CRPCCommand vRPCCommands[] =
     { "getwork",                &getwork,                true },
     { "listaccounts",           &listaccounts,           false },
     { "settxfee",               &settxfee,               false },
-    { "getmemorypool",          &getmemorypool,          true },
+    { "getblocktemplate",       &getblocktemplate,       true },
     { "listsinceblock",         &listsinceblock,         false },
     { "dumpprivkey",            &dumpprivkey,            false },
     { "importprivkey",          &importprivkey,          false },
@@ -2736,7 +2810,7 @@ void JSONRequest::parse(const Value& valRequest)
     if (valMethod.type() != str_type)
         throw JSONRPCError(-32600, "Method must be a string");
     strMethod = valMethod.get_str();
-    if (strMethod != "getwork" && strMethod != "getmemorypool")
+    if (strMethod != "getwork" && strMethod != "getblocktemplate")
         printf("ThreadRPCServer method=%s\n", strMethod.c_str());
 
     // Parse params
@@ -3015,6 +3089,7 @@ Array RPCConvertValues(const std::string &strMethod, const std::vector<std::stri
     if (strMethod == "listtransactions"       && n > 2) ConvertTo<boost::int64_t>(params[2]);
     if (strMethod == "listaccounts"           && n > 0) ConvertTo<boost::int64_t>(params[0]);
     if (strMethod == "walletpassphrase"       && n > 1) ConvertTo<boost::int64_t>(params[1]);
+    if (strMethod == "getblocktemplate"       && n > 0) ConvertTo<Object>(params[0]);
     if (strMethod == "listsinceblock"         && n > 1) ConvertTo<boost::int64_t>(params[1]);
     if (strMethod == "sendmany"               && n > 1) ConvertTo<Object>(params[1]);
     if (strMethod == "sendmany"               && n > 2) ConvertTo<boost::int64_t>(params[2]);