From 7e282415b1b24c51f6bbc5b96b118139ce8b8e99 Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Wed, 11 Jul 2018 23:57:20 -1100
Subject: [PATCH] Coin supply api

---
 src/chain.h           |  2 +-
 src/komodo_bitcoind.h | 47 +++++++++++++++++++++++++++++++++++++++++++
 src/rpcmisc.cpp       | 18 +++++++++++++++++
 src/rpcserver.h       |  1 +
 4 files changed, 67 insertions(+), 1 deletion(-)

diff --git a/src/chain.h b/src/chain.h
index 41cf28652..8c86a7ede 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -121,7 +121,7 @@ public:
 
     //! height of the entry in the chain. The genesis block has height 0
     int nHeight;
-
+    int64_t newcoins;
     //! Which # file this block is stored in (blk?????.dat)
     int nFile;
 
diff --git a/src/komodo_bitcoind.h b/src/komodo_bitcoind.h
index 785cfe6cf..7230757e5 100644
--- a/src/komodo_bitcoind.h
+++ b/src/komodo_bitcoind.h
@@ -1532,3 +1532,50 @@ int32_t komodo_checkPOW(int32_t slowflag,CBlock *pblock,int32_t height)
     else return(0);
 }
 
+int64_t komodo_newcoins(CBlockIndex *pindex)
+{
+    int32_t i,j,m,n,vout; uint256 txid,hashBlock; int64_t vinsum=0,voutsum=0;
+    n = pblock->vtx.size();
+    for (i=0; i<n; i++)
+    {
+        const CTransaction vintx,&tx = pblock->vtx[i];
+        if ( (m= tx.vin.size()) > 0 )
+        {
+            for (j=0; j<m; j++)
+            {
+                if ( i == 0 )
+                    continue;
+                txid = tx.vin[j].prevout.hash;
+                vout = tx.vin[j].prevout.n;
+                if ( !GetTransaction(txid,vintx,hashBlock, false) || vout >= vintx.vout.size() )
+                {
+                    fprintf(stderr,"ERROR: %s/v%d cant find\n",txid.ToString().c_str(),vout);
+                    return(0);
+                }
+                vinsum += vintx.vout[vout].nValue;
+            }
+        }
+        if ( (m= tx.vout.size()) > 0 )
+        {
+            for (j=0; j<m-1; j++)
+                voutsum += tx.vout[j].nValue;
+            script = tx.vout[j].scriptPubKey.data();
+            if ( script == 0 || script[0] != 0x6a )
+                voutsum += tx.vout[j].nValue;
+        }
+    }
+    fprintf(stderr,"ht.%d vins %.8f, vouts %.8f -> %.8f\n",pindex->nHeight,dstr(vinsum),dstr(voutsum),dstr(voutsum)-dstr(vinsum));
+    return(voutsum - vinsum);
+}
+
+int64_t komodo_coinsupply(int32_t height)
+{
+    CBlockIndex *pindex; int64_t supply = 0;
+    if ( (pindex= komodo_chainactive(height)) != 0 )
+    {
+        if ( pindex->newcoins == 0 )
+            pindex->newcoins = komodo_newcoins(pindex);
+        supply += pindex->newcoins;
+    }
+    return(supply);
+}
diff --git a/src/rpcmisc.cpp b/src/rpcmisc.cpp
index 065739a9a..b055e591a 100644
--- a/src/rpcmisc.cpp
+++ b/src/rpcmisc.cpp
@@ -53,6 +53,7 @@ extern uint64_t KOMODO_INTERESTSUM,KOMODO_WALLETBALANCE;
 extern int32_t KOMODO_LASTMINED,JUMBLR_PAUSE,KOMODO_LONGESTCHAIN;
 extern char ASSETCHAINS_SYMBOL[KOMODO_ASSETCHAIN_MAXLEN];
 uint32_t komodo_segid32(char *coinaddr);
+int64_t komodo_coinsupply(int32_t height);
 int32_t notarizedtxid_height(char *dest,char *txidstr,int32_t *kmdnotarized_heightp);
 #define KOMODO_VERSION "0.1.1"
 extern uint16_t ASSETCHAINS_P2PPORT,ASSETCHAINS_RPCPORT;
@@ -226,6 +227,23 @@ public:
 };
 #endif
 
+UniValue coinsupply(const UniValue& params, bool fHelp)
+{
+    int32_t height = 0; int64_t supply = 0; UniValue result(UniValue::VOBJ);
+    if (fHelp || params.size() > 1)
+        throw runtime_error("coinsupply <height>\n");
+    if ( params.size() == 0 )
+        height = chainActive.Height();
+    else height = atoi(params[0].get_str());
+    if ( (supply= komodo_coinsupply(height)) > 0 )
+    {
+        result.push_back(Pair("result", "success"));
+        result.push_back(Pair("height", (int)height));
+        result.push_back(Pair("supply", ValueFromAmount(supply)));
+    } else result.push_back(Pair("error", "couldnt calculate supply"));
+    return(result);
+}
+
 UniValue jumblr_deposit(const UniValue& params, bool fHelp)
 {
     int32_t retval; UniValue result(UniValue::VOBJ);
diff --git a/src/rpcserver.h b/src/rpcserver.h
index 5bb949299..586d79a88 100644
--- a/src/rpcserver.h
+++ b/src/rpcserver.h
@@ -207,6 +207,7 @@ extern UniValue getblocktemplate(const UniValue& params, bool fHelp);
 extern UniValue submitblock(const UniValue& params, bool fHelp);
 extern UniValue estimatefee(const UniValue& params, bool fHelp);
 extern UniValue estimatepriority(const UniValue& params, bool fHelp);
+extern UniValue coinsupply(const UniValue& params, bool fHelp);
 
 extern UniValue getnewaddress(const UniValue& params, bool fHelp); // in rpcwallet.cpp
 //extern UniValue getnewaddress64(const UniValue& params, bool fHelp); // in rpcwallet.cpp