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-rw-r--r--src/policy/fees.cpp19
-rw-r--r--src/policy/fees.h13
2 files changed, 32 insertions, 0 deletions
diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index de3c060d6a..7b0e8b7d08 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -8,6 +8,7 @@
#include "amount.h"
#include "primitives/transaction.h"
+#include "random.h"
#include "streams.h"
#include "txmempool.h"
#include "util.h"
@@ -580,3 +581,21 @@ void CBlockPolicyEstimator::Read(CAutoFile& filein)
priStats.Read(filein);
nBestSeenHeight = nFileBestSeenHeight;
}
+
+FeeFilterRounder::FeeFilterRounder(const CFeeRate& minIncrementalFee)
+{
+ CAmount minFeeLimit = minIncrementalFee.GetFeePerK() / 2;
+ feeset.insert(0);
+ for (double bucketBoundary = minFeeLimit; bucketBoundary <= MAX_FEERATE; bucketBoundary *= FEE_SPACING) {
+ feeset.insert(bucketBoundary);
+ }
+}
+
+CAmount FeeFilterRounder::round(CAmount currentMinFee)
+{
+ std::set<double>::iterator it = feeset.lower_bound(currentMinFee);
+ if ((it != feeset.begin() && insecure_rand() % 3 != 0) || it == feeset.end()) {
+ it--;
+ }
+ return *it;
+}
diff --git a/src/policy/fees.h b/src/policy/fees.h
index 3fa31c39e7..cdd984de7d 100644
--- a/src/policy/fees.h
+++ b/src/policy/fees.h
@@ -286,4 +286,17 @@ private:
CFeeRate feeLikely, feeUnlikely;
double priLikely, priUnlikely;
};
+
+class FeeFilterRounder
+{
+public:
+ /** Create new FeeFilterRounder */
+ FeeFilterRounder(const CFeeRate& minIncrementalFee);
+
+ /** Quantize a minimum fee for privacy purpose before broadcast **/
+ CAmount round(CAmount currentMinFee);
+
+private:
+ std::set<double> feeset;
+};
#endif /*BITCOIN_POLICYESTIMATOR_H */