util: add TicksSeconds

Add a helper to convert durations to integer seconds.

src/test/util_tests.cpp

@@ -585,6 +585,15 @@ BOOST_AUTO_TEST_CASE(util_mocktime)
     SetMockTime(0s);
 }
 
+BOOST_AUTO_TEST_CASE(util_ticksseconds)
+{
+    BOOST_CHECK_EQUAL(TicksSeconds(0s), 0);
+    BOOST_CHECK_EQUAL(TicksSeconds(1s), 1);
+    BOOST_CHECK_EQUAL(TicksSeconds(999ms), 0);
+    BOOST_CHECK_EQUAL(TicksSeconds(1000ms), 1);
+    BOOST_CHECK_EQUAL(TicksSeconds(1500ms), 1);
+}
+
 BOOST_AUTO_TEST_CASE(test_IsDigit)
 {
     BOOST_CHECK_EQUAL(IsDigit('0'), true);

src/util/time.h

@@ -74,6 +74,12 @@ constexpr auto Ticks(Dur2 d)
 {
     return std::chrono::duration_cast<Dur1>(d).count();
 }
+
+template <typename Duration>
+constexpr int64_t TicksSeconds(Duration d)
+{
+    return int64_t{Ticks<std::chrono::seconds>(d)};
+}
 template <typename Duration, typename Timepoint>
 constexpr auto TicksSinceEpoch(Timepoint t)
 {