tx fees, policy: periodically flush fee estimates to fee_estimates.dat

This reduces chances of having old estimates in fee_estimates.dat.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/policy/fees.h b/src/policy/fees.h
index 775a72a764..a6c45839b9 100644
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -14,12 +14,17 @@
 #include <util/fs.h>
 
 #include <array>
+#include <chrono>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
+
+// How often to flush fee estimates to fee_estimates.dat.
+static constexpr std::chrono::hours FEE_FLUSH_INTERVAL{1};
+
 class AutoFile;
 class CTxMemPoolEntry;
 class TxConfirmStats;
@@ -239,6 +244,10 @@ public:
     void Flush()
         EXCLUSIVE_LOCKS_REQUIRED(!m_cs_fee_estimator);
 
+    /** Record current fee estimations. */
+    void FlushFeeEstimates()
+        EXCLUSIVE_LOCKS_REQUIRED(!m_cs_fee_estimator);
+
 private:
     mutable Mutex m_cs_fee_estimator;