reset difficulty

src/cryptonote_basic/difficulty.cpp

@@ -279,8 +279,8 @@ namespace cryptonote {
 
     size_t length = timestamps.size();
     assert(length == cumulative_difficulties.size());
-    if (length <= 1) {
-      return 1;
+    if (length < DIFFICULTY_FORK_HEIGHT + 72) {
+      return DIFFICULTY_RESET;
     }
     static_assert(DIFFICULTY_WINDOW_V3 >= 2, "Window is too small");
     assert(length <= DIFFICULTY_WINDOW_V3);

src/cryptonote_config.h

@@ -90,7 +90,8 @@
 #define DIFFICULTY_BLOCKS_COUNT_V3                      DIFFICULTY_WINDOW_V3 + DIFFICULTY_LAG_V2
 #define DIFFICULTY_BLOCKS_COUNT_V2                      DIFFICULTY_WINDOW_V2 + 1 // added +1 to make N=N
 #define DIFFICULTY_BLOCKS_COUNT                         DIFFICULTY_WINDOW + DIFFICULTY_LAG
-
+#define DIFFICULTY_FORK_HEIGHT                          80969 // ~14 February 2019
+#define DIFFICULTY_RESET                                10000000 // 10 million
 
 #define CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_SECONDS_V1   DIFFICULTY_TARGET_V1 * CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS
 #define CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_SECONDS_V2   DIFFICULTY_TARGET_V2 * CRYPTONOTE_LOCKED_TX_ALLOWED_DELTA_BLOCKS