Make difficulty 128 bit instead of 64 bit

Based on Boolberry work by:
  jahrsg <jahr@jahr.me>
  cr.zoidberg <crypto.zoidberg@gmail.com>

1 files changed, 60 insertions, 4 deletions

diff --git a/tests/difficulty/difficulty.cpp b/tests/difficulty/difficulty.cpp
index ee20e27e4..9985b8710 100644
--- a/tests/difficulty/difficulty.cpp
+++ b/tests/difficulty/difficulty.cpp
@@ -43,16 +43,62 @@ using namespace std;
 
 #define DEFAULT_TEST_DIFFICULTY_TARGET        120
 
+static int test_wide_difficulty(const char *filename)
+{
+    std::vector<uint64_t> timestamps;
+    std::vector<cryptonote::difficulty_type> cumulative_difficulties;
+    fstream data(filename, fstream::in);
+    data.exceptions(fstream::badbit);
+    data.clear(data.rdstate());
+    uint64_t timestamp;
+    cryptonote::difficulty_type difficulty, cumulative_difficulty = 0;
+    size_t n = 0;
+    while (data >> timestamp >> difficulty) {
+        size_t begin, end;
+        if (n < DIFFICULTY_WINDOW + DIFFICULTY_LAG) {
+            begin = 0;
+            end = min(n, (size_t) DIFFICULTY_WINDOW);
+        } else {
+            end = n - DIFFICULTY_LAG;
+            begin = end - DIFFICULTY_WINDOW;
+        }
+        cryptonote::difficulty_type res = cryptonote::next_difficulty(
+            std::vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
+            std::vector<cryptonote::difficulty_type>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
+        if (res != difficulty) {
+            cerr << "Wrong wide difficulty for block " << n << endl
+                << "Expected: " << difficulty << endl
+                << "Found: " << res << endl;
+            return 1;
+        }
+        timestamps.push_back(timestamp);
+        cumulative_difficulties.push_back(cumulative_difficulty += difficulty);
+        ++n;
+    }
+    if (!data.eof()) {
+        data.clear(fstream::badbit);
+    }
+    return 0;
+}
+
 int main(int argc, char *argv[]) {
-    if (argc != 2) {
+    if (argc < 2) {
         cerr << "Wrong arguments" << endl;
         return 1;
     }
+    if (argc == 3 && strcmp(argv[1], "--wide") == 0)
+    {
+        return test_wide_difficulty(argv[2]);
+    }
+
     vector<uint64_t> timestamps, cumulative_difficulties;
+    std::vector<cryptonote::difficulty_type> wide_cumulative_difficulties;
     fstream data(argv[1], fstream::in);
     data.exceptions(fstream::badbit);
     data.clear(data.rdstate());
-    uint64_t timestamp, difficulty, cumulative_difficulty = 0;
+    uint64_t timestamp;
+    uint64_t difficulty, cumulative_difficulty = 0;
+    cryptonote::difficulty_type wide_cumulative_difficulty = 0;
     size_t n = 0;
     while (data >> timestamp >> difficulty) {
         size_t begin, end;
@@ -63,17 +109,27 @@ int main(int argc, char *argv[]) {
             end = n - DIFFICULTY_LAG;
             begin = end - DIFFICULTY_WINDOW;
         }
-        uint64_t res = cryptonote::next_difficulty(
+        uint64_t res = cryptonote::next_difficulty_64(
             vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
-            vector<uint64_t>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
+            std::vector<uint64_t>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
         if (res != difficulty) {
             cerr << "Wrong difficulty for block " << n << endl
                 << "Expected: " << difficulty << endl
                 << "Found: " << res << endl;
             return 1;
         }
+        cryptonote::difficulty_type wide_res = cryptonote::next_difficulty(
+            std::vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
+            std::vector<cryptonote::difficulty_type>(wide_cumulative_difficulties.begin() + begin, wide_cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
+        if (wide_res.convert_to<uint64_t>() != res) {
+            cerr << "Wrong wide difficulty for block " << n << endl
+                << "Expected: " << res << endl
+                << "Found: " << wide_res << endl;
+            return 1;
+        }
         timestamps.push_back(timestamp);
         cumulative_difficulties.push_back(cumulative_difficulty += difficulty);
+        wide_cumulative_difficulties.push_back(wide_cumulative_difficulty += difficulty);
         ++n;
     }
     if (!data.eof()) {