Merge pull request #2290 from RoboticMind/rpc-block-by-time

rpc: Create getblockbymintime

Author: jamescowens

src/rpc/blockchain.cpp

@@ -7,6 +7,7 @@
 #include "blockchain.h"
 #include "node/blockstorage.h"
 #include <util/string.h>
+#include "gridcoin/support/block_finder.h"
 
 #include <univalue.h>
 
@@ -594,6 +595,32 @@ UniValue getblockbynumber(const UniValue& params, bool fHelp)
     return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
 }
 
+UniValue getblockbymintime(const UniValue& params, bool fHelp)
+{
+    if (fHelp || params.size() < 1 || params.size() > 2)
+        throw runtime_error(
+                "getblockbymintime <timestamp> [bool:txinfo]\n"
+                "\n"
+                "[bool:txinfo] optional to print more detailed tx info\n"
+                "\n"
+                "Returns details of the block at or just after the given timestamp\n");
+    
+    int64_t nTimestamp = params[0].get_int64();
+
+    if (nTimestamp < pindexGenesisBlock->nTime || nTimestamp > pindexBest->nTime)
+        throw runtime_error("Timestamp out of range. Cannot be below the time of the genesis block or above the time of the latest block");
+
+    LOCK(cs_main);
+
+    CBlock block;
+    static GRC::BlockFinder block_finder;
+
+    CBlockIndex* pblockindex = block_finder.FindByMinTime(nTimestamp);
+    ReadBlockFromDisk(block, pblockindex, Params().GetConsensus());
+
+    return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
+}
+
 UniValue getblocksbatch(const UniValue& params, bool fHelp)
 {
     g_timer.InitTimer(__func__, LogInstance().WillLogCategory(BCLog::LogFlags::RPC));

src/rpc/client.cpp

@@ -198,6 +198,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "getblock"               , 1 },
     { "getblockbynumber"       , 0 },
     { "getblockbynumber"       , 1 },
+    { "getblockbymintime"      , 0 },
+    { "getblockbymintime"      , 1 },
     { "getblocksbatch"         , 1 },
     { "getblocksbatch"         , 2 },
     { "getblockhash"           , 0 },

src/rpc/server.cpp

@@ -412,6 +412,7 @@ static const CRPCCommand vRPCCommands[] =
     { "getbestblockhash",        &getbestblockhash,        cat_network       },
     { "getblock",                &getblock,                cat_network       },
     { "getblockbynumber",        &getblockbynumber,        cat_network       },
+    { "getblockbymintime",       &getblockbymintime,       cat_network       },
     { "getblocksbatch",          &getblocksbatch,          cat_network       },
     { "getblockcount",           &getblockcount,           cat_network       },
     { "getblockhash",            &getblockhash,            cat_network       },

src/rpc/server.h

@@ -227,6 +227,7 @@ extern UniValue getaddednodeinfo(const UniValue& params, bool fHelp);
 extern UniValue getbestblockhash(const UniValue& params, bool fHelp);
 extern UniValue getblock(const UniValue& params, bool fHelp);
 extern UniValue getblockbynumber(const UniValue& params, bool fHelp);
+extern UniValue getblockbymintime(const UniValue& params, bool fHelp);
 extern UniValue getblocksbatch(const UniValue& params, bool fHelp);
 extern UniValue getblockchaininfo(const UniValue& params, bool fHelp);
 extern UniValue getblockcount(const UniValue& params, bool fHelp);