Disable fee estimates for a confirm target of 1 block

1 files changed, 6 insertions, 1 deletions

diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index 7113390cdf..9eb831bc17 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -404,7 +404,8 @@ void CBlockPolicyEstimator::processBlock(unsigned int nBlockHeight,
 CFeeRate CBlockPolicyEstimator::estimateFee(int confTarget)
 {
     // Return failure if trying to analyze a target we're not tracking
-    if (confTarget <= 0 || (unsigned int)confTarget > feeStats.GetMaxConfirms())
+    // It's not possible to get reasonable estimates for confTarget of 1
+    if (confTarget <= 1 || (unsigned int)confTarget > feeStats.GetMaxConfirms())
         return CFeeRate(0);
 
     double median = feeStats.EstimateMedianVal(confTarget, SUFFICIENT_FEETXS, MIN_SUCCESS_PCT, true, nBestSeenHeight);
@@ -423,6 +424,10 @@ CFeeRate CBlockPolicyEstimator::estimateSmartFee(int confTarget, int *answerFoun
     if (confTarget <= 0 || (unsigned int)confTarget > feeStats.GetMaxConfirms())
         return CFeeRate(0);
 
+    // It's not possible to get reasonable estimates for confTarget of 1
+    if (confTarget == 1)
+        confTarget = 2;
+
     double median = -1;
     while (median < 0 && (unsigned int)confTarget <= feeStats.GetMaxConfirms()) {
         median = feeStats.EstimateMedianVal(confTarget++, SUFFICIENT_FEETXS, MIN_SUCCESS_PCT, true, nBestSeenHeight);