diff --git a/src/core_write.cpp b/src/core_write.cpp
index 6f9e2266a396..51fa35611287 100644
--- a/src/core_write.cpp
+++ b/src/core_write.cpp
@@ -152,6 +152,8 @@ void TxToUniv(const CTransaction& tx, const uint256& hashBlock, UniValue& entry)
 {
     entry.pushKV("txid", tx.GetHash().GetHex());
     entry.pushKV("version", tx.nVersion);
+    entry.pushKV("size", (int)::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION));
+    entry.pushKV("vsize", (GetTransactionWeight(tx) + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR);
     entry.pushKV("locktime", (int64_t)tx.nLockTime);
 
     UniValue vin(UniValue::VARR);
diff --git a/src/rest.cpp b/src/rest.cpp
index c81559212419..e38ccecf0504 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -5,6 +5,7 @@
 
 #include "chain.h"
 #include "chainparams.h"
+#include "core_io.h"
 #include "primitives/block.h"
 #include "primitives/transaction.h"
 #include "main.h"
@@ -58,11 +59,9 @@ struct CCoin {
     }
 };
 
-extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
 extern UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDetails = false);
 extern UniValue mempoolInfoToJSON();
 extern UniValue mempoolToJSON(bool fVerbose = false);
-extern void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex);
 extern UniValue blockheaderToJSON(const CBlockIndex* blockindex);
 
 static bool RESTERR(HTTPRequest* req, enum HTTPStatusCode status, string message)
@@ -387,7 +386,7 @@ static bool rest_tx(HTTPRequest* req, const std::string& strURIPart)
 
     case RF_JSON: {
         UniValue objTx(UniValue::VOBJ);
-        TxToJSON(tx, hashBlock, objTx);
+        TxToUniv(tx, hashBlock, objTx);
         string strJSON = objTx.write() + "\n";
         req->WriteHeader("Content-Type", "application/json");
         req->WriteReply(HTTP_OK, strJSON);
@@ -578,7 +577,7 @@ static bool rest_getutxos(HTTPRequest* req, const std::string& strURIPart)
 
             // include the script in a json output
             UniValue o(UniValue::VOBJ);
-            ScriptPubKeyToJSON(coin.out.scriptPubKey, o, true);
+            ScriptPubKeyToUniv(coin.out.scriptPubKey, o, true);
             utxo.push_back(Pair("scriptPubKey", o));
             utxos.push_back(utxo);
         }
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index f05f8ff3587a..5acd869ab049 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -9,6 +9,7 @@
 #include "checkpoints.h"
 #include "coins.h"
 #include "consensus/validation.h"
+#include "core_io.h"
 #include "main.h"
 #include "policy/policy.h"
 #include "primitives/transaction.h"
@@ -40,9 +41,6 @@ static std::mutex cs_blockchange;
 static std::condition_variable cond_blockchange;
 static CUpdatedBlock latestblock;
 
-extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
-void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex);
-
 double GetDifficulty(const CBlockIndex* blockindex)
 {
     // Floating point number that is a multiple of the minimum difficulty,
@@ -124,7 +122,7 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool tx
         if(txDetails)
         {
             UniValue objTx(UniValue::VOBJ);
-            TxToJSON(tx, uint256(), objTx);
+            TxToUniv(tx, uint256(), objTx);
             txs.push_back(objTx);
         }
         else
@@ -924,7 +922,7 @@ UniValue gettxout(const UniValue& params, bool fHelp)
         ret.push_back(Pair("confirmations", pindex->nHeight - coins.nHeight + 1));
     ret.push_back(Pair("value", ValueFromAmount(coins.vout[n].nValue)));
     UniValue o(UniValue::VOBJ);
-    ScriptPubKeyToJSON(coins.vout[n].scriptPubKey, o, true);
+    ScriptPubKeyToUniv(coins.vout[n].scriptPubKey, o, true);
     ret.push_back(Pair("scriptPubKey", o));
     ret.push_back(Pair("version", coins.nVersion));
     ret.push_back(Pair("coinbase", coins.fCoinBase));
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index d2ad0a52b700..21725608c2c7 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -35,80 +35,14 @@
 
 using namespace std;
 
-void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex)
-{
-    txnouttype type;
-    vector<CTxDestination> addresses;
-    int nRequired;
-
-    out.push_back(Pair("asm", ScriptToAsmStr(scriptPubKey)));
-    if (fIncludeHex)
-        out.push_back(Pair("hex", HexStr(scriptPubKey.begin(), scriptPubKey.end())));
-
-    if (!ExtractDestinations(scriptPubKey, type, addresses, nRequired)) {
-        out.push_back(Pair("type", GetTxnOutputType(type)));
-        return;
-    }
-
-    out.push_back(Pair("reqSigs", nRequired));
-    out.push_back(Pair("type", GetTxnOutputType(type)));
-
-    UniValue a(UniValue::VARR);
-    BOOST_FOREACH(const CTxDestination& addr, addresses)
-        a.push_back(CBitcoinAddress(addr).ToString());
-    out.push_back(Pair("addresses", a));
-}
-
 void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
 {
-    entry.push_back(Pair("txid", tx.GetHash().GetHex()));
-    entry.push_back(Pair("hash", tx.GetWitnessHash().GetHex()));
-    entry.push_back(Pair("size", (int)::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION)));
-    entry.push_back(Pair("vsize", (int)::GetVirtualTransactionSize(tx)));
-    entry.push_back(Pair("version", tx.nVersion));
-    entry.push_back(Pair("locktime", (int64_t)tx.nLockTime));
-
-    UniValue vin(UniValue::VARR);
-    for (unsigned int i = 0; i < tx.vin.size(); i++) {
-        const CTxIn& txin = tx.vin[i];
-        UniValue in(UniValue::VOBJ);
-        if (tx.IsCoinBase())
-            in.push_back(Pair("coinbase", HexStr(txin.scriptSig.begin(), txin.scriptSig.end())));
-        else {
-            in.push_back(Pair("txid", txin.prevout.hash.GetHex()));
-            in.push_back(Pair("vout", (int64_t)txin.prevout.n));
-            UniValue o(UniValue::VOBJ);
-            o.push_back(Pair("asm", ScriptToAsmStr(txin.scriptSig, true)));
-            o.push_back(Pair("hex", HexStr(txin.scriptSig.begin(), txin.scriptSig.end())));
-            in.push_back(Pair("scriptSig", o));
-        }
-        if (!tx.wit.IsNull()) {
-            if (!tx.wit.vtxinwit[i].IsNull()) {
-                UniValue txinwitness(UniValue::VARR);
-                for (unsigned int j = 0; j < tx.wit.vtxinwit[i].scriptWitness.stack.size(); j++) {
-                    std::vector<unsigned char> item = tx.wit.vtxinwit[i].scriptWitness.stack[j];
-                    txinwitness.push_back(HexStr(item.begin(), item.end()));
-                }
-                in.push_back(Pair("txinwitness", txinwitness));
-            }
-
-        }
-        in.push_back(Pair("sequence", (int64_t)txin.nSequence));
-        vin.push_back(in);
-    }
-    entry.push_back(Pair("vin", vin));
-    UniValue vout(UniValue::VARR);
-    for (unsigned int i = 0; i < tx.vout.size(); i++) {
-        const CTxOut& txout = tx.vout[i];
-        UniValue out(UniValue::VOBJ);
-        out.push_back(Pair("value", ValueFromAmount(txout.nValue)));
-        out.push_back(Pair("n", (int64_t)i));
-        UniValue o(UniValue::VOBJ);
-        ScriptPubKeyToJSON(txout.scriptPubKey, o, true);
-        out.push_back(Pair("scriptPubKey", o));
-        vout.push_back(out);
-    }
-    entry.push_back(Pair("vout", vout));
+    // Call into TxToUniv() in bitcoin-common to decode the transaction hex.
+    //
+    // Blockchain contextual information (confirmations and blocktime) is not
+    // available to code in bitcoin-common, so we query them here and push the
+    // data into the returned UniValue.
+    TxToUniv(tx, uint256(), entry);
 
     if (!hashBlock.IsNull()) {
         entry.push_back(Pair("blockhash", hashBlock.GetHex()));
@@ -512,7 +446,7 @@ UniValue decoderawtransaction(const UniValue& params, bool fHelp)
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
 
     UniValue result(UniValue::VOBJ);
-    TxToJSON(tx, uint256(), result);
+    TxToUniv(tx, uint256(), result);
 
     return result;
 }
@@ -552,7 +486,7 @@ UniValue decodescript(const UniValue& params, bool fHelp)
     } else {
         // Empty scripts are valid
     }
-    ScriptPubKeyToJSON(script, r, false);
+    ScriptPubKeyToUniv(script, r, false);
 
     r.push_back(Pair("p2sh", CBitcoinAddress(CScriptID(script)).ToString()));
     return r;
diff --git a/src/rpc/server.h b/src/rpc/server.h
index 4e0aa2c6d6f6..eb64c3ec47ea 100644
--- a/src/rpc/server.h
+++ b/src/rpc/server.h
@@ -31,6 +31,7 @@ namespace RPCServer
 
 class CBlockIndex;
 class CNetAddr;
+class CTransaction;
 
 /** Wrapper for UniValue::VType, which includes typeAny:
  * Used to denote don't care type. Only used by RPCTypeCheckObj */
@@ -188,6 +189,8 @@ extern std::string HelpRequiringPassphrase();
 extern std::string HelpExampleCli(const std::string& methodname, const std::string& args);
 extern std::string HelpExampleRpc(const std::string& methodname, const std::string& args);
 
+extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
+
 extern void EnsureWalletIsUnlocked();
 
 bool StartRPC();