Add savemempool RPC

src/rpc/blockchain.cpp

@@ -1532,6 +1532,25 @@ UniValue getchaintxstats(const JSONRPCRequest& request)
     return ret;
 }
 
+UniValue savemempool(const JSONRPCRequest& request)
+{
+    if (request.fHelp || request.params.size() != 0) {
+        throw std::runtime_error(
+            "savemempool\n"
+            "\nDumps the mempool to disk.\n"
+            "\nExamples:\n"
+            + HelpExampleCli("savemempool", "")
+            + HelpExampleRpc("savemempool", "")
+        );
+    }
+
+    if (!DumpMempool()) {
+        throw JSONRPCError(RPC_MISC_ERROR, "Unable to dump mempool to disk");
+    }
+
+    return NullUniValue;
+}
+
 static const CRPCCommand commands[] =
 { //  category              name                      actor (function)         argNames
   //  --------------------- ------------------------  -----------------------  ----------
@@ -1552,6 +1571,7 @@ static const CRPCCommand commands[] =
     { "blockchain",         "gettxout",               &gettxout,               {"txid","n","include_mempool"} },
     { "blockchain",         "gettxoutsetinfo",        &gettxoutsetinfo,        {} },
     { "blockchain",         "pruneblockchain",        &pruneblockchain,        {"height"} },
+    { "blockchain",         "savemempool",            &savemempool,            {} },
     { "blockchain",         "verifychain",            &verifychain,            {"checklevel","nblocks"} },
 
     { "blockchain",         "preciousblock",          &preciousblock,          {"blockhash"} },