0001-Adds-zero_-RPC-extensions-to-daemon.patch

From 46ce40b6e90f05c5bb8f70059c3c0f19315e201c Mon Sep 17 00:00:00 2001
From: jpmorgan <jpmorgan@doge.st>
Date: Fri, 28 Oct 2016 14:47:47 +1100
Subject: [PATCH] Adds zero_ RPC extensions to daemon

---
 src/rpcblockchain.cpp | 11 ++++++++
 src/rpcmining.cpp     | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/rpcserver.cpp     |  3 +++
 src/rpcserver.h       |  1 +
 4 files changed, 85 insertions(+)

diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 4c92979..ff5f851 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -104,9 +104,20 @@ Object blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDe
     result.push_back(Pair("nonce", block.nNonce.GetHex()));
     result.push_back(Pair("solution", HexStr(block.nSolution)));
     result.push_back(Pair("bits", strprintf("%08x", block.nBits)));
+
+    arith_uint256 bnTmp;
+    bnTmp.SetCompact(block.nBits);
+
+    result.push_back(Pair("target", bnTmp.GetHex()));
     result.push_back(Pair("difficulty", GetDifficulty(blockindex)));
     result.push_back(Pair("chainwork", blockindex->nChainWork.GetHex()));
 
+    CEquihashInput I{block};
+    CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
+    ss << I;
+    ss << block.nNonce;
+    result.push_back(Pair("header_nonce", HexStr(ss.str())));
+
     if (blockindex->pprev)
         result.push_back(Pair("previousblockhash", blockindex->pprev->GetBlockHash().GetHex()));
     CBlockIndex *pnext = chainActive.Next(blockindex);
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index d58e70a..e478860 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -868,3 +868,73 @@ Value getblocksubsidy(const Array& params, bool fHelp)
     result.push_back(Pair("founders", ValueFromAmount(nFoundersReward)));
     return result;
 }
+
+Value zero_getblocktemplate(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() < 1 || params.size() > 1)
+        throw runtime_error(
+            "zero_getblocktemplate \"coinbase_address\"\n"
+        );
+
+    // Validate address
+    CBitcoinAddress address(params[0].get_str());
+    if (!address.IsValid()) {
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Coinbase address invalid");
+    }
+
+    CTxDestination dest = address.Get();
+    CScript scriptPubKey = GetScriptForDestination(dest);
+
+    unsigned int nExtraNonce = 0;
+
+    // Make the block template
+    unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(scriptPubKey));
+    if (!pblocktemplate.get())
+        throw JSONRPCError(RPC_INTERNAL_ERROR, "Block template failed");
+
+    CBlock *pblock = &pblocktemplate->block;
+
+    int nHeight = 0;
+    {
+        LOCK(cs_main);
+
+        // This call sets the merkle root
+        IncrementExtraNonce(pblock, chainActive.Tip(), nExtraNonce);
+        nHeight = chainActive.Height();
+    }
+
+    // The solution is not yet filled and has a length of zero.
+    for (int i = 0; i < 1344; i++) {
+        pblock->nSolution.push_back(0x90);
+    }
+
+    // The block is now ready to be sent to the miner to start work
+    Object ret;
+    ret.push_back(Pair("height", nHeight));
+    ret.push_back(Pair("n", static_cast<uint64_t>(Params().EquihashN())));
+    ret.push_back(Pair("k", static_cast<uint64_t>(Params().EquihashK())));
+
+    // Return the subsidy as well
+    CAmount nReward = GetBlockSubsidy(nHeight, Params().GetConsensus());
+    CAmount nFoundersReward = 0;
+    if ((nHeight > 0) && (nHeight <= Params().GetConsensus().GetLastFoundersRewardBlockHeight())) {
+        nFoundersReward = nReward/5;
+        nReward -= nFoundersReward;
+    }
+
+    // Write the block header
+    Object block_header;
+    block_header.push_back(Pair("miner_subsidy", ValueFromAmount(nReward)));
+    block_header.push_back(Pair("version", pblock->nVersion));
+    block_header.push_back(Pair("prevblock", pblock->hashPrevBlock.GetHex()));
+    block_header.push_back(Pair("merkleroot", pblock->hashMerkleRoot.GetHex()));
+    block_header.push_back(Pair("reserved", pblock->hashReserved.GetHex()));
+    block_header.push_back(Pair("time", pblock->GetBlockTime()));
+    block_header.push_back(Pair("bits", strprintf("%08x", pblock->nBits)));
+    ret.push_back(Pair("header", block_header));
+
+    CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
+    ssBlock << *pblock;
+    ret.push_back(Pair("raw", HexStr(ssBlock.begin(), ssBlock.end())));
+    return ret;
+}
diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp
index e354e91..1f9a3fe 100644
--- a/src/rpcserver.cpp
+++ b/src/rpcserver.cpp
@@ -342,6 +342,9 @@ static const CRPCCommand vRPCCommands[] =
     { "hidden",             "resendwallettransactions", &resendwallettransactions, true},
 #endif
 
+    /* Mining extensions for zero */
+    { "mining",             "zero_getblocktemplate",  &zero_getblocktemplate,  true  },
+
 #ifdef ENABLE_WALLET
     /* Wallet */
     { "wallet",             "addmultisigaddress",     &addmultisigaddress,     true  },
diff --git a/src/rpcserver.h b/src/rpcserver.h
index fd53bf1..bec99e2 100644
--- a/src/rpcserver.h
+++ b/src/rpcserver.h
@@ -267,6 +267,7 @@ extern json_spirit::Value z_getoperationresult(const json_spirit::Array& params,
 extern json_spirit::Value z_listoperationids(const json_spirit::Array& params, bool fHelp); // in rpcwallet.cpp
 extern json_spirit::Value z_validateaddress(const json_spirit::Array& params, bool fHelp); // in rpcmisc.cpp
 
+extern json_spirit::Value zero_getblocktemplate(const json_spirit::Array& params, bool fHelp);
 
 // in rest.cpp
 extern bool HTTPReq_REST(AcceptedConnection *conn,
-- 
2.10.2