gettransaction RPC for non-wallet transactions

Works for wallet transactions, memory-pool transaction and block chain
transactions.

Available for all:
 * txid
 * version
 * locktime
 * size
 * coinbase/inputs/outputs
 * confirmations

Available only for wallet transactions:
 * amount
 * fee
 * details
 * blockindex

Available for wallet transactions and block chain transactions:
 * blockhash
 * time

3 files changed, 107 insertions, 16 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 3c2d69e506..e6c7826a83 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -130,6 +130,40 @@ void WalletTxToJSON(const CWalletTx& wtx, Object& entry)
         entry.push_back(Pair(item.first, item.second));
 }
 
+void TxToJSON(const CTransaction &tx, Object& entry)
+{
+    entry.push_back(Pair("version", tx.nVersion));
+    entry.push_back(Pair("locktime", (boost::int64_t)tx.nLockTime));
+    entry.push_back(Pair("size", (boost::int64_t)::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION)));
+    Array vin;
+    BOOST_FOREACH(const CTxIn& txin, tx.vin)
+    {
+        Object in;
+        if (tx.IsCoinBase())
+            in.push_back(Pair("coinbase", HexStr(txin.scriptSig.begin(), txin.scriptSig.end())));
+        else
+        {
+            Object prevout;
+            prevout.push_back(Pair("hash", txin.prevout.hash.GetHex()));
+            prevout.push_back(Pair("n", (boost::int64_t)txin.prevout.n));
+            in.push_back(Pair("prevout", prevout));
+            in.push_back(Pair("scriptSig", txin.scriptSig.ToString()));
+        }
+        in.push_back(Pair("sequence", (boost::int64_t)txin.nSequence));
+        vin.push_back(in);
+    }
+    entry.push_back(Pair("vin", vin));
+    Array vout;
+    BOOST_FOREACH(const CTxOut& txout, tx.vout)
+    {
+        Object out;
+        out.push_back(Pair("value", ValueFromAmount(txout.nValue)));
+        out.push_back(Pair("scriptPubKey", txout.scriptPubKey.ToString()));
+        vout.push_back(out);
+    }
+    entry.push_back(Pair("vout", vout));
+}
+
 string AccountFromValue(const Value& value)
 {
     string strAccount = value.get_str();
@@ -1472,24 +1506,57 @@ Value gettransaction(const Array& params, bool fHelp)
 
     Object entry;
 
-    if (!pwalletMain->mapWallet.count(hash))
-        throw JSONRPCError(-5, "Invalid or non-wallet transaction id");
-    const CWalletTx& wtx = pwalletMain->mapWallet[hash];
+    if (pwalletMain->mapWallet.count(hash))
+    {
+        const CWalletTx& wtx = pwalletMain->mapWallet[hash];
+
+        TxToJSON(wtx, entry);
 
-    int64 nCredit = wtx.GetCredit();
-    int64 nDebit = wtx.GetDebit();
-    int64 nNet = nCredit - nDebit;
-    int64 nFee = (wtx.IsFromMe() ? wtx.GetValueOut() - nDebit : 0);
+        int64 nCredit = wtx.GetCredit();
+        int64 nDebit = wtx.GetDebit();
+        int64 nNet = nCredit - nDebit;
+        int64 nFee = (wtx.IsFromMe() ? wtx.GetValueOut() - nDebit : 0);
 
-    entry.push_back(Pair("amount", ValueFromAmount(nNet - nFee)));
-    if (wtx.IsFromMe())
-        entry.push_back(Pair("fee", ValueFromAmount(nFee)));
+        entry.push_back(Pair("amount", ValueFromAmount(nNet - nFee)));
+        if (wtx.IsFromMe())
+            entry.push_back(Pair("fee", ValueFromAmount(nFee)));
 
-    WalletTxToJSON(pwalletMain->mapWallet[hash], entry);
+        WalletTxToJSON(wtx, entry);
 
-    Array details;
-    ListTransactions(pwalletMain->mapWallet[hash], "*", 0, false, details);
-    entry.push_back(Pair("details", details));
+        Array details;
+        ListTransactions(pwalletMain->mapWallet[hash], "*", 0, false, details);
+        entry.push_back(Pair("details", details));
+    }
+    else
+    {
+        CTransaction tx;
+        uint256 hashBlock = 0;
+        if (GetTransaction(hash, tx, hashBlock))
+        {
+            entry.push_back(Pair("txid", hash.GetHex()));
+            TxToJSON(tx, entry);
+            if (hashBlock == 0)
+                entry.push_back(Pair("confirmations", 0));
+            else
+            {
+                entry.push_back(Pair("blockhash", hashBlock.GetHex()));
+                map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
+                if (mi != mapBlockIndex.end() && (*mi).second)
+                {
+                    CBlockIndex* pindex = (*mi).second;
+                    if (pindex->IsInMainChain())
+                    {
+                        entry.push_back(Pair("confirmations", 1 + nBestHeight - pindex->nHeight));
+                        entry.push_back(Pair("time", (boost::int64_t)pindex->nTime));
+                    }
+                    else
+                        entry.push_back(Pair("confirmations", 0));
+                }
+            }
+        }
+        else
+            throw JSONRPCError(-5, "No information available about transaction");
+    }
 
     return entry;
 }
diff --git a/src/main.cpp b/src/main.cpp
index 78d84d9064..de54606714 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -733,7 +733,31 @@ int CTxIndex::GetDepthInMainChain() const
     return 1 + nBestHeight - pindex->nHeight;
 }
 
-
+// Return transaction in tx, and if it was found inside a block, its hash is placed in hashBlock
+bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock)
+{
+    {
+        LOCK(cs_main);
+        {
+            LOCK(mempool.cs);
+            if (mempool.exists(hash))
+            {
+                tx = mempool.lookup(hash);
+                return true;
+            }
+        }
+        CTxDB txdb("r");
+        CTxIndex txindex;
+        if (tx.ReadFromDisk(txdb, COutPoint(hash, 0), txindex))
+        {
+            CBlock block;
+            if (block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
+                hashBlock = block.GetHash();
+            return true;
+        }
+    }
+    return false;
+}
 
 
 
diff --git a/src/main.h b/src/main.h
index d12a3cc258..d26e6316e1 100644
--- a/src/main.h
+++ b/src/main.h
@@ -101,7 +101,7 @@ unsigned int ComputeMinWork(unsigned int nBase, int64 nTime);
 int GetNumBlocksOfPeers();
 bool IsInitialBlockDownload();
 std::string GetWarnings(std::string strFor);
-
+bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock);