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-rw-r--r--src/cryptonote_basic/difficulty.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cryptonote_basic/difficulty.h b/src/cryptonote_basic/difficulty.h
index f7a9376fb..02ed89e5a 100644
--- a/src/cryptonote_basic/difficulty.h
+++ b/src/cryptonote_basic/difficulty.h
@@ -32,6 +32,7 @@
#include <cstdint>
#include <vector>
+#include <string>
#include <boost/multiprecision/cpp_int.hpp>
#include "crypto/hash.h"
@@ -58,4 +59,6 @@ namespace cryptonote
bool check_hash_128(const crypto::hash &hash, difficulty_type difficulty);
bool check_hash(const crypto::hash &hash, difficulty_type difficulty);
difficulty_type next_difficulty(std::vector<std::uint64_t> timestamps, std::vector<difficulty_type> cumulative_difficulties, size_t target_seconds);
+
+ std::string hex(difficulty_type v);
}