WIP: Implemented getblockheaderbyheight.

src/cn_utils/cryptonote_config.h

@@ -40,7 +40,7 @@
 #define CRYPTONOTE_PUBLIC_ADDRESS_TEXTBLOB_VER          0
 #define CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW            60
 #define CURRENT_TRANSACTION_VERSION                     1
-#define CURRENT_BLOCK_MAJOR_VERSION                     1
+#define CURRENT_BLOCK_MAJOR_VERSION                     8
 #define CURRENT_BLOCK_MINOR_VERSION                     0
 #define CRYPTONOTE_BLOCK_FUTURE_TIME_LIMIT              60*60*2
 

src/rpc/blockchain.cpp

@@ -702,6 +702,88 @@ UniValue getblockheader(const JSONRPCRequest& request)
     return blockheaderToJSON(pblockindex);
 }
 
+
+// Cryptonote RPC API: getblockheaderbyheight
+UniValue getblockheaderbyheight(const JSONRPCRequest& request)
+{
+    if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
+        throw std::runtime_error(
+            "getblockheader \"hash\" ( verbose )\n"
+            "\nIf verbose is false, returns a string that is serialized, hex-encoded data for blockheader 'hash'.\n"
+            "If verbose is true, returns an Object with information about blockheader <hash>.\n"
+            "\nArguments:\n"
+            "1. \"height\"          (numeric, required) The block height\n"
+            "2. verbose           (boolean, optional, default=true) true for a json object, false for the hex encoded data\n"
+            "\nResult (for verbose = true):\n"
+            "{\n"
+            "  \"hash\" : \"hash\",     (string) the block hash (same as provided)\n"
+            "  \"confirmations\" : n,   (numeric) The number of confirmations, or -1 if the block is not on the main chain\n"
+            "  \"height\" : n,          (numeric) The block height or index\n"
+            "  \"version\" : n,         (numeric) The block version\n"
+            "  \"versionHex\" : \"00000000\", (string) The block version formatted in hexadecimal\n"
+            "  \"merkleroot\" : \"xxxx\", (string) The merkle root\n"
+            "  \"time\" : ttt,          (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)\n"
+            "  \"mediantime\" : ttt,    (numeric) The median block time in seconds since epoch (Jan 1 1970 GMT)\n"
+            "  \"nonce\" : n,           (numeric) The nonce\n"
+            "  \"bits\" : \"1d00ffff\", (string) The bits\n"
+            "  \"difficulty\" : x.xxx,  (numeric) The difficulty\n"
+            "  \"chainwork\" : \"0000...1f3\"     (string) Expected number of hashes required to produce the current chain (in hex)\n"
+            "  \"nTx\" : n,             (numeric) The number of transactions in the block.\n"
+            "  \"previousblockhash\" : \"hash\",  (string) The hash of the previous block\n"
+            "  \"nextblockhash\" : \"hash\",      (string) The hash of the next block\n"
+            "}\n"
+            "\nResult (for verbose=false):\n"
+            "\"data\"             (string) A string that is serialized, hex-encoded data for block 'hash'.\n"
+            "\nExamples:\n"
+            + HelpExampleCli("getblockheader", "\"e2acdf2dd19a702e5d12a925f1e984b01e47a933562ca893656d4afb38b44ee3\"")
+            + HelpExampleRpc("getblockheader", "\"e2acdf2dd19a702e5d12a925f1e984b01e47a933562ca893656d4afb38b44ee3\"")
+        );
+
+    LOCK(cs_main);
+
+    int nHeight = request.params[0].get_int();
+    if (nHeight < 0 || nHeight > chainActive.Height())
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "Block height out of range");
+
+    CBlockIndex* pblockindex = chainActive[nHeight];
+    CBlock block;
+    if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus())) {
+        throw JSONRPCError(RPC_MISC_ERROR, "Block not found on disk");
+    }
+
+    CTransactionRef coinbaseTx = block.vtx[0];
+    if (!coinbaseTx->IsCoinBase()) {
+        throw JSONRPCError(RPC_MISC_ERROR, "Could not find coinbase");
+    }
+    //TODO: easier way to do this?
+    CAmount coinbaseValue = coinbaseTx->GetValueOut();
+
+    UniValue result(UniValue::VOBJ);
+
+    // TODO: read major/minor versions from cn header.
+    result.push_back(Pair("major_version", (uint64_t)0));
+    result.push_back(Pair("minor_version", (uint64_t)0));
+
+    result.push_back(Pair("timestamp", (uint64_t)pblockindex->nTime));
+    result.push_back(Pair("prev_hash", pblockindex->pprev->GetBlockHash().GetHex()));
+    result.push_back(Pair("nonce", (uint64_t)pblockindex->nNonce));
+    result.push_back(Pair("orphan_status", false));
+    result.push_back(Pair("height", (uint64_t)pblockindex->nHeight));
+    const uint64_t depth = chainActive.Height() - nHeight + 1; // Same as confirmations.
+    result.push_back(Pair("depth", (uint64_t)depth));
+    result.push_back(Pair("hash", pblockindex->GetBlockHash().GetHex()));
+    result.push_back(Pair("difficulty", GetDifficulty(pblockindex)));
+
+    // TODO: implement cumulative_difficulty
+    result.push_back(Pair("cumulative_difficulty", 0));
+    result.push_back(Pair("reward", (uint64_t)coinbaseValue));
+    result.push_back(Pair("block_size", (int)::GetBlockWeight(block)));
+    result.push_back(Pair("num_txes", (uint64_t)pblockindex->nTx));
+    result.push_back(Pair("pow_hash", pblockindex->GetBlockPoWHash().GetHex()));
+    result.push_back(Pair("long_term_weight", 0.0)); // Not implemented
+    return result;
+}
+
 UniValue getblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)

src/rpc/mining.cpp

@@ -938,9 +938,9 @@ UniValue getblocktemplate(const JSONRPCRequest& request)
     UniValue result(UniValue::VOBJ);
     const double difficulty = ConvertNBitsToDiff(pblock->nBits);
     result.push_back(Pair("blocktemplate_blob", pblock->hashPrevBlock.GetHex()));
-    result.push_back(Pair("difficulty", std::to_string(difficulty)));
-    result.push_back(Pair("height", std::to_string(height)));
-    result.push_back(Pair("reserved_offset", std::to_string(reserved_offset)));
+    result.push_back(Pair("difficulty", (double)difficulty));
+    result.push_back(Pair("height", (uint64_t)height));
+    result.push_back(Pair("reserved_offset", (uint64_t)reserved_offset));
 
     // Kevacoin specific entries. Not used for now and may be useful in the future.
     result.push_back(Pair("rules", aRules));