qt: Modernize 'confirmed' terminology in shown tx status

These days we regard transactions with one confirmation to be
'Confirmed'.
Waiting for 6 confirmations is a recommendation but should not
keep the transaction shown as unconfirmed.

Misc code sanity:

- Merge maturity/status enums, they had become completely disjunct
- 'confirmed' flag is now called 'countsForBalance' for clarity

3 files changed, 111 insertions, 128 deletions

diff --git a/src/qt/transactionrecord.cpp b/src/qt/transactionrecord.cpp
index 8cfaed27c7..703a2b4e79 100644
--- a/src/qt/transactionrecord.cpp
+++ b/src/qt/transactionrecord.cpp
@@ -164,7 +164,7 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
         (wtx.IsCoinBase() ? 1 : 0),
         wtx.nTimeReceived,
         idx);
-    status.confirmed = wtx.IsTrusted();
+    status.countsForBalance = wtx.IsTrusted() && !(wtx.GetBlocksToMaturity() > 0);
     status.depth = wtx.GetDepthInMainChain();
     status.cur_num_blocks = chainActive.Height();
 
@@ -181,33 +181,12 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
             status.open_for = wtx.nLockTime;
         }
     }
-    else
-    {
-        if (status.depth < 0)
-        {
-            status.status = TransactionStatus::Conflicted;
-        }
-        else if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
-        {
-            status.status = TransactionStatus::Offline;
-        }
-        else if (status.depth < NumConfirmations)
-        {
-            status.status = TransactionStatus::Unconfirmed;
-        }
-        else
-        {
-            status.status = TransactionStatus::HaveConfirmations;
-        }
-    }
-
     // For generated transactions, determine maturity
-    if(type == TransactionRecord::Generated)
+    else if(type == TransactionRecord::Generated)
     {
-        int64_t nCredit = wtx.GetCredit(true);
-        if (nCredit == 0)
+        if (wtx.GetBlocksToMaturity() > 0)
         {
-            status.maturity = TransactionStatus::Immature;
+            status.status = TransactionStatus::Immature;
 
             if (wtx.IsInMainChain())
             {
@@ -215,18 +194,42 @@ void TransactionRecord::updateStatus(const CWalletTx &wtx)
 
                 // Check if the block was requested by anyone
                 if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
-                    status.maturity = TransactionStatus::MaturesWarning;
+                    status.status = TransactionStatus::MaturesWarning;
             }
             else
             {
-                status.maturity = TransactionStatus::NotAccepted;
+                status.status = TransactionStatus::NotAccepted;
             }
         }
         else
         {
-            status.maturity = TransactionStatus::Mature;
+            status.status = TransactionStatus::Confirmed;
+        }
+    }
+    else
+    {
+        if (status.depth < 0)
+        {
+            status.status = TransactionStatus::Conflicted;
+        }
+        else if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
+        {
+            status.status = TransactionStatus::Offline;
+        }
+        else if (status.depth == 0)
+        {
+            status.status = TransactionStatus::Unconfirmed;
+        }
+        else if (status.depth < RecommendedNumConfirmations)
+        {
+            status.status = TransactionStatus::Confirming;
+        }
+        else
+        {
+            status.status = TransactionStatus::Confirmed;
         }
     }
+
 }
 
 bool TransactionRecord::statusUpdateNeeded()
diff --git a/src/qt/transactionrecord.h b/src/qt/transactionrecord.h
index d7be0bc438..af6fd403b3 100644
--- a/src/qt/transactionrecord.h
+++ b/src/qt/transactionrecord.h
@@ -19,33 +19,32 @@ class TransactionStatus
 {
 public:
     TransactionStatus():
-        confirmed(false), sortKey(""), maturity(Mature),
+        countsForBalance(false), sortKey(""),
         matures_in(0), status(Offline), depth(0), open_for(0), cur_num_blocks(-1)
     { }
 
-    enum Maturity
-    {
-        Immature,
-        Mature,
-        MaturesWarning, /**< Transaction will likely not mature because no nodes have confirmed */
-        NotAccepted
-    };
-
     enum Status {
-        OpenUntilDate,
-        OpenUntilBlock,
-        Offline,
-        Unconfirmed,
-        HaveConfirmations,
-        Conflicted
+        Confirmed,          /**< Have 6 or more confirmations (normal tx) or fully mature (mined tx) **/
+        /// Normal (sent/received) transactions
+        OpenUntilDate,      /**< Transaction not yet final, waiting for date */
+        OpenUntilBlock,     /**< Transaction not yet final, waiting for block */
+        Offline,            /**< Not sent to any other nodes **/
+        Unconfirmed,        /**< Not yet mined into a block **/
+        Confirming,         /**< Confirmed, but waiting for the recommended number of confirmations **/
+        Conflicted,         /**< Conflicts with other transaction or mempool **/
+        /// Generated (mined) transactions
+        Immature,           /**< Mined but waiting for maturity */
+        MaturesWarning,     /**< Transaction will likely not mature because no nodes have confirmed */
+        NotAccepted         /**< Mined but not accepted */
     };
 
-    bool confirmed;
+    /// Transaction counts towards available balance
+    bool countsForBalance;
+    /// Sorting key based on status
     std::string sortKey;
 
     /** @name Generated (mined) transactions
        @{*/
-    Maturity maturity;
     int matures_in;
     /**@}*/
 
@@ -79,8 +78,8 @@ public:
         SendToSelf
     };
 
-    /** Number of confirmation needed for transaction */
-    static const int NumConfirmations = 6;
+    /** Number of confirmation recommended for accepting a transaction */
+    static const int RecommendedNumConfirmations = 6;
 
     TransactionRecord():
             hash(), time(0), type(Other), address(""), debit(0), credit(0), idx(0)
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 7d76204ba4..959987461f 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -285,45 +285,38 @@ QString TransactionTableModel::formatTxStatus(const TransactionRecord *wtx) cons
 {
     QString status;
 
-    if(wtx->type == TransactionRecord::Generated)
+    switch(wtx->status.status)
     {
-        switch(wtx->status.maturity)
-        {
-        case TransactionStatus::Immature:
-            status = tr("Immature (%1 confirmations, will be available after %2)").arg(wtx->status.depth).arg(wtx->status.depth + wtx->status.matures_in);
-            break;
-        case TransactionStatus::Mature:
-            status = tr("Confirmed (%1 confirmations)").arg(wtx->status.depth);
-            break;
-        case TransactionStatus::MaturesWarning:
-            status = tr("This block was not received by any other nodes and will probably not be accepted!");
-            break;
-        case TransactionStatus::NotAccepted:
-            status = tr("Generated but not accepted");
-            break;
-        }
-    } else {
-        switch(wtx->status.status)
-        {
-        case TransactionStatus::OpenUntilBlock:
-            status = tr("Open for %n more block(s)","",wtx->status.open_for);
-            break;
-        case TransactionStatus::OpenUntilDate:
-            status = tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx->status.open_for));
-            break;
-        case TransactionStatus::Offline:
-            status = tr("Offline");
-            break;
-        case TransactionStatus::Unconfirmed:
-            status = tr("Unconfirmed (%1 of %2 confirmations)").arg(wtx->status.depth).arg(TransactionRecord::NumConfirmations);
-            break;
-        case TransactionStatus::HaveConfirmations:
-            status = tr("Confirmed (%1 confirmations)").arg(wtx->status.depth);
-            break;
-        case TransactionStatus::Conflicted:
-            status = tr("Conflicted");
-            break;
-        }
+    case TransactionStatus::OpenUntilBlock:
+        status = tr("Open for %n more block(s)","",wtx->status.open_for);
+        break;
+    case TransactionStatus::OpenUntilDate:
+        status = tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx->status.open_for));
+        break;
+    case TransactionStatus::Offline:
+        status = tr("Offline");
+        break;
+    case TransactionStatus::Unconfirmed:
+        status = tr("Unconfirmed");
+        break;
+    case TransactionStatus::Confirming:
+        status = tr("Confirming (%1 of %2 recommended confirmations)").arg(wtx->status.depth).arg(TransactionRecord::RecommendedNumConfirmations);
+        break;
+    case TransactionStatus::Confirmed:
+        status = tr("Confirmed (%1 confirmations)").arg(wtx->status.depth);
+        break;
+    case TransactionStatus::Conflicted:
+        status = tr("Conflicted");
+        break;
+    case TransactionStatus::Immature:
+        status = tr("Immature (%1 confirmations, will be available after %2)").arg(wtx->status.depth).arg(wtx->status.depth + wtx->status.matures_in);
+        break;
+    case TransactionStatus::MaturesWarning:
+        status = tr("This block was not received by any other nodes and will probably not be accepted!");
+        break;
+    case TransactionStatus::NotAccepted:
+        status = tr("Generated but not accepted");
+        break;
     }
 
     return status;
@@ -441,7 +434,7 @@ QString TransactionTableModel::formatTxAmount(const TransactionRecord *wtx, bool
     QString str = BitcoinUnits::format(walletModel->getOptionsModel()->getDisplayUnit(), wtx->credit + wtx->debit);
     if(showUnconfirmed)
     {
-        if(!wtx->status.confirmed || wtx->status.maturity != TransactionStatus::Mature)
+        if(!wtx->status.countsForBalance)
         {
             str = QString("[") + str + QString("]");
         }
@@ -451,46 +444,36 @@ QString TransactionTableModel::formatTxAmount(const TransactionRecord *wtx, bool
 
 QVariant TransactionTableModel::txStatusDecoration(const TransactionRecord *wtx) const
 {
-    if(wtx->type == TransactionRecord::Generated)
-    {
-        switch(wtx->status.maturity)
-        {
-        case TransactionStatus::Immature: {
-            int total = wtx->status.depth + wtx->status.matures_in;
-            int part = (wtx->status.depth * 4 / total) + 1;
-            return QIcon(QString(":/icons/transaction_%1").arg(part));
-            }
-        case TransactionStatus::Mature:
-            return QIcon(":/icons/transaction_confirmed");
-        case TransactionStatus::MaturesWarning:
-        case TransactionStatus::NotAccepted:
-            return QIcon(":/icons/transaction_0");
-        }
-    }
-    else
+    switch(wtx->status.status)
     {
-        switch(wtx->status.status)
+    case TransactionStatus::OpenUntilBlock:
+    case TransactionStatus::OpenUntilDate:
+        return QColor(64,64,255);
+    case TransactionStatus::Offline:
+        return QColor(192,192,192);
+    case TransactionStatus::Unconfirmed:
+        return QIcon(":/icons/transaction_0");
+    case TransactionStatus::Confirming:
+        switch(wtx->status.depth)
         {
-        case TransactionStatus::OpenUntilBlock:
-        case TransactionStatus::OpenUntilDate:
-            return QColor(64,64,255);
-        case TransactionStatus::Offline:
-            return QColor(192,192,192);
-        case TransactionStatus::Unconfirmed:
-            switch(wtx->status.depth)
-            {
-            case 0: return QIcon(":/icons/transaction_0");
-            case 1: return QIcon(":/icons/transaction_1");
-            case 2: return QIcon(":/icons/transaction_2");
-            case 3: return QIcon(":/icons/transaction_3");
-            case 4: return QIcon(":/icons/transaction_4");
-            default: return QIcon(":/icons/transaction_5");
-            };
-        case TransactionStatus::HaveConfirmations:
-            return QIcon(":/icons/transaction_confirmed");
-        case TransactionStatus::Conflicted:
-            return QIcon(":/icons/transaction_conflicted");
+        case 1: return QIcon(":/icons/transaction_1");
+        case 2: return QIcon(":/icons/transaction_2");
+        case 3: return QIcon(":/icons/transaction_3");
+        case 4: return QIcon(":/icons/transaction_4");
+        default: return QIcon(":/icons/transaction_5");
+        };
+    case TransactionStatus::Confirmed:
+        return QIcon(":/icons/transaction_confirmed");
+    case TransactionStatus::Conflicted:
+        return QIcon(":/icons/transaction_conflicted");
+    case TransactionStatus::Immature: {
+        int total = wtx->status.depth + wtx->status.matures_in;
+        int part = (wtx->status.depth * 4 / total) + 1;
+        return QIcon(QString(":/icons/transaction_%1").arg(part));
         }
+    case TransactionStatus::MaturesWarning:
+    case TransactionStatus::NotAccepted:
+        return QIcon(":/icons/transaction_0");
     }
     return QColor(0,0,0);
 }
@@ -557,8 +540,8 @@ QVariant TransactionTableModel::data(const QModelIndex &index, int role) const
     case Qt::TextAlignmentRole:
         return column_alignments[index.column()];
     case Qt::ForegroundRole:
-        // Non-confirmed transactions are grey
-        if(!rec->status.confirmed)
+        // Non-confirmed (but not immature) as transactions are grey
+        if(!rec->status.countsForBalance && rec->status.status != TransactionStatus::Immature)
         {
             return COLOR_UNCONFIRMED;
         }
@@ -586,9 +569,7 @@ QVariant TransactionTableModel::data(const QModelIndex &index, int role) const
     case TxIDRole:
         return rec->getTxID();
     case ConfirmedRole:
-        // Return True if transaction counts for balance
-        return rec->status.confirmed && !(rec->type == TransactionRecord::Generated &&
-                                          rec->status.maturity != TransactionStatus::Mature);
+        return rec->status.countsForBalance;
     case FormattedAmountRole:
         return formatTxAmount(rec, false);
     case StatusRole: