Merge #15906: [wallet] Move min_depth and max_depth to coin control

80ba4241a6773590f6b2c18dae758097b5adc02e extract min & max depth onto coin control (Amiti Uttarwar)

Pull request description:

  - Refactor `AvailableCoins` to pull min & max depths from coin control.
  - Add `m_max_depth` to coin control to support this.

  - Addresses issue https://github.com/bitcoin/bitcoin/issues/15823, see thread for further details.

ACKs for top commit:
  laanwj:
    ACK 80ba4241a6773590f6b2c18dae758097b5adc02e

Tree-SHA512: 8f7c0aa90b3bc3667baf6741b1da2829f3919e1df92ae097d86c6b239f0c024eb410d7100e6251ea8fc49d022fb5a1214bf79b0f8b0014945b7784b2311647d1

5 files changed, 18 insertions, 6 deletions

diff --git a/src/wallet/coincontrol.cpp b/src/wallet/coincontrol.cpp
index 60bce66839..14513bc9e9 100644
--- a/src/wallet/coincontrol.cpp
+++ b/src/wallet/coincontrol.cpp
@@ -20,5 +20,7 @@ void CCoinControl::SetNull()
     m_confirm_target.reset();
     m_signal_bip125_rbf.reset();
     m_fee_mode = FeeEstimateMode::UNSET;
+    m_min_depth = DEFAULT_MIN_DEPTH;
+    m_max_depth = DEFAULT_MAX_DEPTH;
 }
 
diff --git a/src/wallet/coincontrol.h b/src/wallet/coincontrol.h
index 249c402e4d..92a290530c 100644
--- a/src/wallet/coincontrol.h
+++ b/src/wallet/coincontrol.h
@@ -12,6 +12,9 @@
 
 #include <boost/optional.hpp>
 
+const int DEFAULT_MIN_DEPTH = 0;
+const int DEFAULT_MAX_DEPTH = 9999999;
+
 /** Coin Control Features. */
 class CCoinControl
 {
@@ -39,7 +42,9 @@ public:
     //! Fee estimation mode to control arguments to estimateSmartFee
     FeeEstimateMode m_fee_mode;
     //! Minimum chain depth value for coin availability
-    int m_min_depth{0};
+    int m_min_depth = DEFAULT_MIN_DEPTH;
+    //! Maximum chain depth value for coin availability
+    int m_max_depth = DEFAULT_MAX_DEPTH;
 
     CCoinControl()
     {
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index f95d025815..bf72ef6b16 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2879,9 +2879,11 @@ static UniValue listunspent(const JSONRPCRequest& request)
     {
         CCoinControl cctl;
         cctl.m_avoid_address_reuse = false;
+        cctl.m_min_depth = nMinDepth;
+        cctl.m_max_depth = nMaxDepth;
         auto locked_chain = pwallet->chain().lock();
         LOCK(pwallet->cs_wallet);
-        pwallet->AvailableCoins(*locked_chain, vecOutputs, !include_unsafe, &cctl, nMinimumAmount, nMaximumAmount, nMinimumSumAmount, nMaximumCount, nMinDepth, nMaxDepth);
+        pwallet->AvailableCoins(*locked_chain, vecOutputs, !include_unsafe, &cctl, nMinimumAmount, nMaximumAmount, nMinimumSumAmount, nMaximumCount);
     }
 
     LOCK(pwallet->cs_wallet);
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 11a2154f53..ef5f0a61e1 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2448,7 +2448,7 @@ CAmount CWallet::GetAvailableBalance(const CCoinControl* coinControl) const
     return balance;
 }
 
-void CWallet::AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<COutput> &vCoins, bool fOnlySafe, const CCoinControl *coinControl, const CAmount &nMinimumAmount, const CAmount &nMaximumAmount, const CAmount &nMinimumSumAmount, const uint64_t nMaximumCount, const int nMinDepth, const int nMaxDepth) const
+void CWallet::AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<COutput>& vCoins, bool fOnlySafe, const CCoinControl* coinControl, const CAmount& nMinimumAmount, const CAmount& nMaximumAmount, const CAmount& nMinimumSumAmount, const uint64_t nMaximumCount) const
 {
     AssertLockHeld(cs_wallet);
 
@@ -2457,6 +2457,8 @@ void CWallet::AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<
     // Either the WALLET_FLAG_AVOID_REUSE flag is not set (in which case we always allow), or we default to avoiding, and only in the case where
     // a coin control object is provided, and has the avoid address reuse flag set to false, do we allow already used addresses
     bool allow_used_addresses = !IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE) || (coinControl && !coinControl->m_avoid_address_reuse);
+    const int min_depth = {coinControl ? coinControl->m_min_depth : DEFAULT_MIN_DEPTH};
+    const int max_depth = {coinControl ? coinControl->m_max_depth : DEFAULT_MAX_DEPTH};
 
     for (const auto& entry : mapWallet)
     {
@@ -2516,8 +2518,9 @@ void CWallet::AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<
             continue;
         }
 
-        if (nDepth < nMinDepth || nDepth > nMaxDepth)
+        if (nDepth < min_depth || nDepth > max_depth) {
             continue;
+        }
 
         for (unsigned int i = 0; i < wtx.tx->vout.size(); i++) {
             if (wtx.tx->vout[i].nValue < nMinimumAmount || wtx.tx->vout[i].nValue > nMaximumAmount)
@@ -2959,7 +2962,7 @@ bool CWallet::CreateTransaction(interfaces::Chain::Lock& locked_chain, const std
         LOCK(cs_wallet);
         {
             std::vector<COutput> vAvailableCoins;
-            AvailableCoins(*locked_chain, vAvailableCoins, true, &coin_control, 1, MAX_MONEY, MAX_MONEY, 0, coin_control.m_min_depth);
+            AvailableCoins(*locked_chain, vAvailableCoins, true, &coin_control, 1, MAX_MONEY, MAX_MONEY, 0);
             CoinSelectionParams coin_selection_params; // Parameters for coin selection, init with dummy
 
             // Create change script that will be used if we need change
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 27f7472806..86c2cf851c 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -951,7 +951,7 @@ public:
     /**
      * populate vCoins with vector of available COutputs.
      */
-    void AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<COutput>& vCoins, bool fOnlySafe=true, const CCoinControl *coinControl = nullptr, const CAmount& nMinimumAmount = 1, const CAmount& nMaximumAmount = MAX_MONEY, const CAmount& nMinimumSumAmount = MAX_MONEY, const uint64_t nMaximumCount = 0, const int nMinDepth = 0, const int nMaxDepth = 9999999) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
+    void AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<COutput>& vCoins, bool fOnlySafe = true, const CCoinControl* coinControl = nullptr, const CAmount& nMinimumAmount = 1, const CAmount& nMaximumAmount = MAX_MONEY, const CAmount& nMinimumSumAmount = MAX_MONEY, const uint64_t nMaximumCount = 0) const EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);
 
     /**
      * Return list of available coins and locked coins grouped by non-change output address.