Reworked base

newantireplay/cache.go

@@ -0,0 +1,32 @@
+package newantireplay
+
+import (
+	"github.com/allegro/bigcache"
+
+	"github.com/9seconds/mtg/newconfig"
+)
+
+var cache *bigcache.BigCache
+
+func Add(data []byte) {
+	cache.Set(string(data), nil)
+}
+
+func Has(data []byte) bool {
+	_, err := cache.Get(string(data))
+	return err == nil
+}
+
+func Init() {
+	c, err := bigcache.NewBigCache(bigcache.Config{
+		Shards:           1024,
+		LifeWindow:       newconfig.C.AntiReplay.EvictionTime,
+		Hasher:           hasher{},
+		HardMaxCacheSize: newconfig.C.AntiReplay.MaxSize,
+	})
+	if err != nil {
+		panic(err)
+	}
+
+	cache = c
+}

newantireplay/hasher.go

@@ -0,0 +1,9 @@
+package newantireplay
+
+import "github.com/cespare/xxhash"
+
+type hasher struct{}
+
+func (h hasher) Sum64(value string) uint64 {
+	return xxhash.Sum64String(value)
+}