feat: functions to convert unix epoch to fil epoch (#252)

adds `unix_to_height` and `height_and_unix` to translate a unix epoch in seconds to a fil epoch. Makes searching the messages tables more fun. License: MIT Signed-off-by: Oli Evans <[email protected]>
filecoin-project · Nov 24, 2020 · 2f13ca1 · 2f13ca1
1 parent 8e4825e
commit 2f13ca1
Showing 1 changed file with 26 additions and 0 deletions.
diff --git a/storage/migrations/21_height_functions.go b/storage/migrations/21_height_functions.go
@@ -0,0 +1,26 @@
+package migrations
+
+import (
+	"github.com/go-pg/migrations/v8"
+)
+
+// Schema version 21 adds helper functions to convert from unix epoch to fil epoch
+
+func init() {
+	up := batch(`
+	CREATE OR REPLACE FUNCTION public.unix_to_height(unix_epoch bigint) RETURNS bigint AS $$
+		SELECT ((unix_epoch - 1598306400) / 30)::bigint;
+	$$ LANGUAGE SQL;
+
+	CREATE OR REPLACE FUNCTION public.height_to_unix(fil_epoch bigint) RETURNS bigint AS $$
+		SELECT ((fil_epoch * 30) + 1598306400)::bigint;
+	$$ LANGUAGE SQL;
+`)
+
+	down := batch(`
+	DROP FUNCTION IF EXISTS public.unix_to_height;
+	DROP FUNCTION IF EXISTS public.height_to_unix;
+`)
+
+	migrations.MustRegisterTx(up, down)
+}