From 17045fe506592257ebf4e155b787a49979cacac4 Mon Sep 17 00:00:00 2001
From: jamescowens <jamesowens@optonline.net>
Date: Sun, 30 Aug 2020 17:52:04 -0400
Subject: [PATCH] Fix for self-transactions in listtransactions

---
 src/wallet/wallet.cpp | 44 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 9ba8aceaa1..30d9ed146e 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -778,8 +778,16 @@ void CWalletTx::GetAmounts(list<COutputEntry>& listReceived, list<COutputEntry>&
 
     strSentAccount = strFromAccount;
 
+    // This is the same as nDebit > 0, i.e. we sent the transaction.
     bool fIsFromMe = IsFromMe();
 
+    // This will be true if this is a self-transaction.
+    bool fIsAllToMe = true;
+    for (auto const& txout : vout)
+    {
+        fIsAllToMe = fIsAllToMe && (pwallet->IsMine(txout) != ISMINE_NO);
+    }
+
     // Used for coinstake rollup.
     int64_t amount = 0;
 
@@ -790,11 +798,11 @@ void CWalletTx::GetAmounts(list<COutputEntry>& listReceived, list<COutputEntry>&
 
     // Compute fee:
     int64_t nDebit = GetDebit(filter);
-    // debit > 0 means we signed/sent this transaction, we do not record a fee for
+    // fIsFromMe true means we signed/sent this transaction, we do not record a fee for
     // coinstakes. The fees collected from other transactions in the block are added
     // to the staker's output(s) that are the staker's. Therefore fees only need
     // to be shown for non-coinstake send transactions.
-    if (nDebit > 0 && !fIsCoinStake)
+    if (fIsFromMe && !fIsCoinStake)
     {
         int64_t nValueOut = GetValueOut();
         nFee = nDebit - nValueOut;
@@ -808,7 +816,7 @@ void CWalletTx::GetAmounts(list<COutputEntry>& listReceived, list<COutputEntry>&
         // Only need to handle txouts if AT LEAST one of these is true:
         //   1) they debit from us (sent)
         //   2) the output is to us (received)
-        if (nDebit > 0)
+        if (fIsFromMe)
         {
             // If not a coinstake, don't report 'change' txouts. Txouts on change addresses for coinstakes
             // must be reported because a change address itself can stake, and there is no "change" on a
@@ -830,7 +838,7 @@ void CWalletTx::GetAmounts(list<COutputEntry>& listReceived, list<COutputEntry>&
         // We exclude coinstake outputs 0 and 1 from sends, because output 0 is empty and output 1 MUST go back to
         // the staker (i.e. is not a send by definition). Notice that for a normal self-transaction, the send and
         // receive details will be suppressed; however, the fee will be reported in the nFee parameter.
-        if (fIsMine == ISMINE_NO && ((i > 1 && fIsCoinStakeMine) || (!fIsCoinStake && nDebit > 0)))
+        if (fIsMine == ISMINE_NO && ((i > 1 && fIsCoinStakeMine) || (!fIsCoinStake && fIsFromMe)))
         {
             if (!ExtractDestination(txout.scriptPubKey, address))
             {
@@ -888,6 +896,34 @@ void CWalletTx::GetAmounts(list<COutputEntry>& listReceived, list<COutputEntry>&
             output = {address, txout.nValue, (int) i};
             listReceived.push_back(output);
         }
+
+        // Self-transactions...
+
+        if (fIsFromMe && fIsAllToMe)
+        {
+            if (!ExtractDestination(txout.scriptPubKey, address))
+            {
+                if (txout.scriptPubKey[0] != OP_RETURN)
+                {
+                    LogPrintf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s",
+                              this->GetHash().ToString().c_str());
+                }
+
+                address = CNoDestination();
+            }
+
+            // For a self-transaction, the output has to be both a send and a receive. Note that an
+            // unfortunate side-effect of this solution for self-transaction listing is that the fee
+            // will be reported on both the send and receive transactions in the ListTransactions that
+            // normally calls this function, but that is better than simply reporting the receive side only
+            // of a self-transaction, which is typically what is done.
+            //
+            // Also, a mixed transaction where some of the outputs are back to oneself, and others are to
+            // other addressees, does not qualify here. Those only the output sends will be reported.
+            output = {address, txout.nValue, (int) i};
+            listSent.push_back(output);
+            listReceived.push_back(output);
+        }
     }
 }