wallet: Provide input bytes to COutput

src/bench/coin_selection.cpp

@@ -58,7 +58,7 @@ static void CoinSelection(benchmark::Bench& bench)
     // Create coins
     std::vector<COutput> coins;
     for (const auto& wtx : wtxs) {
-        coins.emplace_back(wallet, *wtx, /*iIn=*/ 0, /*depth=*/ 6 * 24, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, wtx->GetTxTime(), /*from_me=*/ true, /*use_max_sig_in=*/ false);
+        coins.emplace_back(wallet, *wtx, /*iIn=*/ 0, /*depth=*/ 6 * 24, GetTxSpendSize(wallet, *wtx, 0), /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, wtx->GetTxTime(), /*from_me=*/ true);
     }
 
     const CoinEligibilityFilter filter_standard(1, 6, 0);

src/wallet/spend.cpp

@@ -193,7 +193,7 @@ void AvailableCoins(const CWallet& wallet, std::vector<COutput>& vCoins, const C
             bool solvable = provider ? IsSolvable(*provider, wtx.tx->vout[i].scriptPubKey) : false;
             bool spendable = ((mine & ISMINE_SPENDABLE) != ISMINE_NO) || (((mine & ISMINE_WATCH_ONLY) != ISMINE_NO) && (coinControl && coinControl->fAllowWatchOnly && solvable));
 
-            vCoins.emplace_back(wallet, wtx, i, nDepth, spendable, solvable, safeTx, wtx.GetTxTime(), tx_from_me, /*use_max_sig_in=*/ (coinControl && coinControl->fAllowWatchOnly));
+            vCoins.emplace_back(wallet, wtx, i, nDepth, GetTxSpendSize(wallet, wtx, i, /*use_max_sig=*/ (coinControl && coinControl->fAllowWatchOnly)), spendable, solvable, safeTx, wtx.GetTxTime(), tx_from_me);
 
             // Checks the sum amount of all UTXO's.
             if (nMinimumSumAmount != MAX_MONEY) {
@@ -278,7 +278,7 @@ std::map<CTxDestination, std::vector<COutput>> ListCoins(const CWallet& wallet)
                 CTxDestination address;
                 if (ExtractDestination(FindNonChangeParentOutput(wallet, *wtx.tx, output.n).scriptPubKey, address)) {
                     result[address].emplace_back(
-                        wallet, wtx, output.n, depth, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ false, wtx.GetTxTime(), CachedTxIsFromMe(wallet, wtx, ISMINE_ALL), /*use_max_sig_in=*/ false);
+                        wallet, wtx, output.n, depth, GetTxSpendSize(wallet, wtx, output.n), /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ false, wtx.GetTxTime(), CachedTxIsFromMe(wallet, wtx, ISMINE_ALL));
                 }
             }
         }

src/wallet/spend.h

@@ -11,7 +11,9 @@
 #include <wallet/wallet.h>
 
 namespace wallet {
-/** Get the marginal bytes if spending the specified output from this transaction */
+/** Get the marginal bytes if spending the specified output from this transaction.
+ * use_max_sig indicates whether to use the maximum sized, 72 byte signature when calculating the
+ * size of the input spend. This should only be set when watch-only outputs are allowed */
 int GetTxSpendSize(const CWallet& wallet, const CWalletTx& wtx, unsigned int out, bool use_max_sig = false);
 
 class COutput
@@ -38,9 +40,6 @@ public:
     /** Whether we know how to spend this output, ignoring the lack of keys */
     bool solvable;
 
-    /** Whether to use the maximum sized, 72 byte signature when calculating the size of the input spend. This should only be set when watch-only outputs are allowed */
-    bool use_max_sig;
-
     /**
      * Whether this output is considered safe to spend. Unconfirmed transactions
      * from outside keys and unconfirmed replacement transactions are considered
@@ -54,24 +53,17 @@ public:
     /** Whether the transaction containing this output is sent from the owning wallet */
     bool from_me;
 
-    COutput(const CWallet& wallet, const CWalletTx& wtx, int iIn, int depth, bool spendable, bool solvable, bool safe, int64_t time, bool from_me, bool use_max_sig_in)
+    COutput(const CWallet& wallet, const CWalletTx& wtx, int iIn, int depth, int input_bytes, bool spendable, bool solvable, bool safe, int64_t time, bool from_me)
         : tx(&wtx),
         i(iIn),
         depth(depth),
-        input_bytes(-1),
+        input_bytes(input_bytes),
         spendable(spendable),
         solvable(solvable),
-        use_max_sig(use_max_sig_in),
         safe(safe),
         time(time),
         from_me(from_me)
-    {
+    {}
-        // If known and signable by the given wallet, compute input_bytes
-        // Failure will keep this value -1
-        if (spendable) {
-            input_bytes = GetTxSpendSize(wallet, wtx, i, use_max_sig);
-        }
-    }
 
     std::string ToString() const;
 

src/wallet/test/coinselector_tests.cpp

@@ -88,7 +88,7 @@ static void add_coin(std::vector<COutput>& coins, CWallet& wallet, const CAmount
     auto ret = wallet.mapWallet.emplace(std::piecewise_construct, std::forward_as_tuple(txid), std::forward_as_tuple(MakeTransactionRef(std::move(tx)), TxStateInactive{}));
     assert(ret.second);
     CWalletTx& wtx = (*ret.first).second;
-    coins.emplace_back(wallet, wtx, nInput, nAge, /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, wtx.GetTxTime(), fIsFromMe, /*use_max_sig_in=*/ false);
+    coins.emplace_back(wallet, wtx, nInput, nAge, GetTxSpendSize(wallet, wtx, nInput), /*spendable=*/ true, /*solvable=*/ true, /*safe=*/ true, wtx.GetTxTime(), fIsFromMe);
 }
 
 /** Check if SelectionResult a is equivalent to SelectionResult b.