1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/fuzz/fees.cpp b/src/test/fuzz/fees.cpp
new file mode 100644
index 0000000000..f29acace23
--- /dev/null
+++ b/src/test/fuzz/fees.cpp
@@ -0,0 +1,29 @@
+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <amount.h>
+#include <optional.h>
+#include <policy/fees.h>
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+#include <test/fuzz/util.h>
+#include <util/fees.h>
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
+    const CFeeRate minimal_incremental_fee{ConsumeMoney(fuzzed_data_provider)};
+    FeeFilterRounder fee_filter_rounder{minimal_incremental_fee};
+    while (fuzzed_data_provider.ConsumeBool()) {
+        const CAmount current_minimum_fee = ConsumeMoney(fuzzed_data_provider);
+        const CAmount rounded_fee = fee_filter_rounder.round(current_minimum_fee);
+        assert(MoneyRange(rounded_fee));
+    }
+    const FeeReason fee_reason = fuzzed_data_provider.PickValueInArray({FeeReason::NONE, FeeReason::HALF_ESTIMATE, FeeReason::FULL_ESTIMATE, FeeReason::DOUBLE_ESTIMATE, FeeReason::CONSERVATIVE, FeeReason::MEMPOOL_MIN, FeeReason::PAYTXFEE, FeeReason::FALLBACK, FeeReason::REQUIRED});
+    (void)StringForFeeReason(fee_reason);
+}