Implement caching dns resolver

antireplay/noop.go

@@ -5,7 +5,6 @@ import "github.com/9seconds/mtg/v2/mtglib"
 type noop struct{}
 
 func (n noop) SeenBefore(_ []byte) bool { return false }
-func (n noop) Shutdown()                {}
 
 func NewNoop() mtglib.AntiReplayCache {
 	return noop{}

antireplay/noop_test.go

@@ -18,8 +18,6 @@ func (suite *NoopTestSuite) TestOp() {
 	suite.False(filter.SeenBefore([]byte{4, 5, 6}))
 	suite.False(filter.SeenBefore([]byte{1, 2, 3}))
 	suite.False(filter.SeenBefore([]byte{4, 5, 6}))
-
-	filter.Shutdown()
 }
 
 func TestNoop(t *testing.T) {

antireplay/stable_bloom_filter.go

@@ -20,8 +20,6 @@ func (s *stableBloomFilter) SeenBefore(digest []byte) bool {
 	return s.filter.TestAndAdd(digest)
 }
 
-func (s *stableBloomFilter) Shutdown() {}
-
 func NewStableBloomFilter(byteSize uint, errorRate float64) mtglib.AntiReplayCache {
 	sf := boom.NewDefaultStableBloomFilter(byteSize*8, errorRate) // nolint: gomnd
 	sf.SetHash(xxhash.New64())

antireplay/stable_bloom_filter_test.go

@@ -18,8 +18,6 @@ func (suite *StableBloomFilterTestSuite) TestOp() {
 	suite.False(filter.SeenBefore([]byte{4, 5, 6}))
 	suite.True(filter.SeenBefore([]byte{1, 2, 3}))
 	suite.True(filter.SeenBefore([]byte{4, 5, 6}))
-
-	filter.Shutdown()
 }
 
 func TestStableBloomFilter(t *testing.T) {