Remove checking of mempool min fee from estimateSmartFee.

This check has been moved to the wallet logic GetMinimumFee. The rpc call to
estimatesmartfee will now no longer return a result maxed with the mempool min
fee, but automated fee calculations from the wallet will produce the same result
as before and coincontrol and sendcoins dialogs in the GUI will correctly
display the right prospective fee.

changes to policy/fees.cpp include a big whitespace indentation change.

2 files changed, 52 insertions, 60 deletions

diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index 03fe11a0d8..45f9765231 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -826,8 +826,10 @@ double CBlockPolicyEstimator::estimateConservativeFee(unsigned int doubleTarget,
  * estimates, however, required the 95% threshold at 2 * target be met for any
  * longer time horizons also.
  */
-CFeeRate CBlockPolicyEstimator::estimateSmartFee(int confTarget, FeeCalculation *feeCalc, const CTxMemPool& pool, bool conservative) const
+CFeeRate CBlockPolicyEstimator::estimateSmartFee(int confTarget, FeeCalculation *feeCalc, bool conservative) const
 {
+    LOCK(cs_feeEstimator);
+
     if (feeCalc) {
         feeCalc->desiredTarget = confTarget;
         feeCalc->returnedTarget = confTarget;
@@ -835,80 +837,70 @@ CFeeRate CBlockPolicyEstimator::estimateSmartFee(int confTarget, FeeCalculation
 
     double median = -1;
     EstimationResult tempResult;
-    {
-        LOCK(cs_feeEstimator);
 
-        // Return failure if trying to analyze a target we're not tracking
-        if (confTarget <= 0 || (unsigned int)confTarget > longStats->GetMaxConfirms())
-            return CFeeRate(0);
+    // Return failure if trying to analyze a target we're not tracking
+    if (confTarget <= 0 || (unsigned int)confTarget > longStats->GetMaxConfirms())
+        return CFeeRate(0);
 
-        // It's not possible to get reasonable estimates for confTarget of 1
-        if (confTarget == 1)
-            confTarget = 2;
+    // It's not possible to get reasonable estimates for confTarget of 1
+    if (confTarget == 1)
+        confTarget = 2;
 
-        unsigned int maxUsableEstimate = MaxUsableEstimate();
-        if (maxUsableEstimate <= 1)
-            return CFeeRate(0);
+    unsigned int maxUsableEstimate = MaxUsableEstimate();
+    if (maxUsableEstimate <= 1)
+        return CFeeRate(0);
 
-        if ((unsigned int)confTarget > maxUsableEstimate) {
-            confTarget = maxUsableEstimate;
-        }
+    if ((unsigned int)confTarget > maxUsableEstimate) {
+        confTarget = maxUsableEstimate;
+    }
 
-        assert(confTarget > 0); //estimateCombinedFee and estimateConservativeFee take unsigned ints
-        /** true is passed to estimateCombined fee for target/2 and target so
-         * that we check the max confirms for shorter time horizons as well.
-         * This is necessary to preserve monotonically increasing estimates.
-         * For non-conservative estimates we do the same thing for 2*target, but
-         * for conservative estimates we want to skip these shorter horizons
-         * checks for 2*target because we are taking the max over all time
-         * horizons so we already have monotonically increasing estimates and
-         * the purpose of conservative estimates is not to let short term
-         * fluctuations lower our estimates by too much.
-         */
-        double halfEst = estimateCombinedFee(confTarget/2, HALF_SUCCESS_PCT, true, &tempResult);
+    assert(confTarget > 0); //estimateCombinedFee and estimateConservativeFee take unsigned ints
+    /** true is passed to estimateCombined fee for target/2 and target so
+     * that we check the max confirms for shorter time horizons as well.
+     * This is necessary to preserve monotonically increasing estimates.
+     * For non-conservative estimates we do the same thing for 2*target, but
+     * for conservative estimates we want to skip these shorter horizons
+     * checks for 2*target because we are taking the max over all time
+     * horizons so we already have monotonically increasing estimates and
+     * the purpose of conservative estimates is not to let short term
+     * fluctuations lower our estimates by too much.
+     */
+    double halfEst = estimateCombinedFee(confTarget/2, HALF_SUCCESS_PCT, true, &tempResult);
+    if (feeCalc) {
+        feeCalc->est = tempResult;
+        feeCalc->reason = FeeReason::HALF_ESTIMATE;
+    }
+    median = halfEst;
+    double actualEst = estimateCombinedFee(confTarget, SUCCESS_PCT, true, &tempResult);
+    if (actualEst > median) {
+        median = actualEst;
         if (feeCalc) {
             feeCalc->est = tempResult;
-            feeCalc->reason = FeeReason::HALF_ESTIMATE;
+            feeCalc->reason = FeeReason::FULL_ESTIMATE;
         }
-        median = halfEst;
-        double actualEst = estimateCombinedFee(confTarget, SUCCESS_PCT, true, &tempResult);
-        if (actualEst > median) {
-            median = actualEst;
-            if (feeCalc) {
-                feeCalc->est = tempResult;
-                feeCalc->reason = FeeReason::FULL_ESTIMATE;
-            }
+    }
+    double doubleEst = estimateCombinedFee(2 * confTarget, DOUBLE_SUCCESS_PCT, !conservative, &tempResult);
+    if (doubleEst > median) {
+        median = doubleEst;
+        if (feeCalc) {
+            feeCalc->est = tempResult;
+            feeCalc->reason = FeeReason::DOUBLE_ESTIMATE;
         }
-        double doubleEst = estimateCombinedFee(2 * confTarget, DOUBLE_SUCCESS_PCT, !conservative, &tempResult);
-        if (doubleEst > median) {
-            median = doubleEst;
+    }
+
+    if (conservative || median == -1) {
+        double consEst =  estimateConservativeFee(2 * confTarget, &tempResult);
+        if (consEst > median) {
+            median = consEst;
             if (feeCalc) {
                 feeCalc->est = tempResult;
-                feeCalc->reason = FeeReason::DOUBLE_ESTIMATE;
+                feeCalc->reason = FeeReason::CONSERVATIVE;
             }
         }
-
-        if (conservative || median == -1) {
-            double consEst =  estimateConservativeFee(2 * confTarget, &tempResult);
-            if (consEst > median) {
-                median = consEst;
-                if (feeCalc) {
-                    feeCalc->est = tempResult;
-                    feeCalc->reason = FeeReason::CONSERVATIVE;
-                }
-            }
-        }
-    } // Must unlock cs_feeEstimator before taking mempool locks
+    }
 
     if (feeCalc) feeCalc->returnedTarget = confTarget;
 
-    // If mempool is limiting txs , return at least the min feerate from the mempool
-    CAmount minPoolFee = pool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFeePerK();
-    if (minPoolFee > 0 && minPoolFee > median) {
-        if (feeCalc) feeCalc->reason = FeeReason::MEMPOOL_MIN;
-        return CFeeRate(minPoolFee);
-    }
-
     if (median < 0)
         return CFeeRate(0);
 
diff --git a/src/policy/fees.h b/src/policy/fees.h
index 4c80371c5c..f4ef793643 100644
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -208,7 +208,7 @@ public:
      *  the closest target where one can be given.  'conservative' estimates are
      *  valid over longer time horizons also.
      */
-    CFeeRate estimateSmartFee(int confTarget, FeeCalculation *feeCalc, const CTxMemPool& pool, bool conservative) const;
+    CFeeRate estimateSmartFee(int confTarget, FeeCalculation *feeCalc, bool conservative) const;
 
     /** Return a specific fee estimate calculation with a given success
      * threshold and time horizon, and optionally return detailed data about