add an rpc command for getting the value of a name

src/ncctrie.cpp

@@ -113,27 +113,17 @@ json_spirit::Array CNCCTrie::dumpToJSON() const
     return ret;
 }
 
-json_spirit::Object CNCCTrie::getInfoForName(const std::string& name) const
+bool CNCCTrie::getInfoForName(const std::string& name, CNodeValue& val) const
 {
-    using namespace json_spirit;
-    Object ret;
     const CNCCTrieNode* current = &root;
     for (std::string::const_iterator itname = name.begin(); itname != name.end(); ++itname)
     {
         nodeMapType::const_iterator itchildren = current->children.find(*itname);
         if (itchildren == current->children.end())
-            return ret;
+            return false;
         current = itchildren->second;
     }
-    CNodeValue val;
-    if (current->getValue(val))
-    {
-        ret.push_back(Pair("txid", val.txhash.GetHex()));
-        ret.push_back(Pair("n", (int)val.nOut));
-        ret.push_back(Pair("value", val.nAmount));
-        ret.push_back(Pair("height", val.nHeight));
-    }
-    return ret;
+    return current->getValue(val);
 }
 
 bool CNCCTrie::checkConsistency()

src/ncctrie.h

@@ -130,7 +130,7 @@ public:
     bool checkConsistency();
     bool ReadFromDisk(bool check = false);
     json_spirit::Array dumpToJSON() const;
-    json_spirit::Object getInfoForName(const std::string& name) const;
+    bool getInfoForName(const std::string& name, CNodeValue& val) const;
     friend class CNCCTrieCache;
 private:
     bool update(nodeCacheType& cache, hashMapType& hashes, const uint256& hashBlock);

src/rpcncctrie.cpp

@@ -1,4 +1,5 @@
 #include "main.h"
+#include "ncc.h"
 
 #include "json/json_spirit_value.h"
 
@@ -36,20 +37,71 @@ Value gettxinfoforname(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() != 1)
         throw std::runtime_error(
-            "gettxinfoforname\n"
+            "gettxinfoforname \"name\"\n"
             "Return information about the transaction that has successfully claimed a name, if one exists\n"
             "Arguments:\n"
             "1. \"name\"          (string) the name about which to return info\n"
             "Result: \n"
             "\"txid\"             (string) the hash of the transaction which successfully claimed the name\n"
             "\"n\"                (numeric) vout value\n"
-            "\"value\"            (numeric) txout value\n"
+            "\"amount\"           (numeric) txout amount\n"
             "\"height\"           (numeric) the height of the block in which this transaction is located\n"
         ); 
     LOCK(cs_main);
 
     std::string name = params[0].get_str();
     
-    Object ret = pnccTrie->getInfoForName(name);
+    Object ret;// = pnccTrie->getInfoForName(name);
+    CNodeValue val;
+    if (pnccTrie->getInfoForName(name, val))
+    {
+        ret.push_back(Pair("txid", val.txhash.GetHex()));
+        ret.push_back(Pair("n", (int)val.nOut));
+        ret.push_back(Pair("amount", val.nAmount));
+        ret.push_back(Pair("height", val.nHeight));
+    }
     return ret;
 }
+
+Value getvalueforname(const Array& params, bool fHelp)
+{
+    if (fHelp || params.size() != 1)
+        throw std::runtime_error(
+            "getvalueforname \"name\"\n"
+            "Return the value associated with a name, if one exists\n"
+            "Arguments:\n"
+            "1. \"name\"             (string) the name to look up\n"
+            "Result: \n"
+            "\"value\"               (string) the value of the name, if it exists\n"
+        );
+    LOCK(cs_main);
+    std::string name = params[0].get_str();
+    CNodeValue val;
+    Object ret;
+    if (!pnccTrie->getInfoForName(name, val))
+        return ret;
+    CCoinsViewCache view(pcoinsTip);
+    const CCoins* coin = view.AccessCoins(val.txhash);
+    if (!coin)
+    {
+        LogPrintf("%s: %s does not exist in the coins view, despite being associated with a name\n",
+                  __func__, val.txhash.GetHex());
+        return ret;
+    }
+    if (coin->vout.size() < val.nOut || coin->vout[val.nOut].IsNull())
+    {
+        LogPrintf("%s: the specified txout of %s appears to have been spent\n", __func__, val.txhash.GetHex());
+        return ret;
+    }
+    
+    int op;
+    std::vector<std::vector<unsigned char> > vvchParams;
+    if (!DecodeNCCScript(coin->vout[val.nOut].scriptPubKey, op, vvchParams))
+    {
+        LogPrintf("%s: the specified txout of %s does not have an NCC command\n", __func__, val.txhash.GetHex());
+    }
+    std::string sValue(vvchParams[1].begin(), vvchParams[1].end());
+    ret.push_back(Pair("value", sValue));
+    return ret;
+}
+

src/rpcserver.cpp

@@ -384,6 +384,7 @@ static const CRPCCommand vRPCCommands[] =
     /* NCC trie */
     { "ncctrie",            "getncctrie",             &getncctrie,             true,      false},
     { "ncctrie",            "gettxinfoforname",       &gettxinfoforname,       true,      false},
+    { "ncctrie",            "getvalueforname",        &getvalueforname,        true,      false},
 };
 
 CRPCTable::CRPCTable()

src/rpcserver.h

@@ -239,6 +239,7 @@ extern json_spirit::Value reconsiderblock(const json_spirit::Array& params, bool
 
 extern json_spirit::Value getncctrie(const json_spirit::Array& params, bool fHelp); // in rpcncctrie.cpp
 extern json_spirit::Value gettxinfoforname(const json_spirit::Array& params, bool fHelp);
+extern json_spirit::Value getvalueforname(const json_spirit::Array& params, bool fHelp);
 
 // in rest.cpp
 extern bool HTTPReq_REST(AcceptedConnection *conn,