expose merkledb config defaults

Signed-off-by: Joshua Kim <[email protected]>

Author: joshua-kim

x/merkledb/db.go

@@ -159,6 +159,21 @@ type MerkleDB interface {
 	Prefetcher
 }
 
+func NewConfig() Config {
+	return Config{
+		BranchFactor:                BranchFactor16,
+		Hasher:                      DefaultHasher,
+		RootGenConcurrency:          0,
+		HistoryLength:               300,
+		ValueNodeCacheSize:          units.MiB,
+		IntermediateNodeCacheSize:   units.MiB,
+		IntermediateWriteBufferSize: units.KiB,
+		IntermediateWriteBatchSize:  256 * units.KiB,
+		TraceLevel:                  InfoTrace,
+		Tracer:                      trace.Noop,
+	}
+}
+
 type Config struct {
 	// BranchFactor determines the number of children each node can have.
 	BranchFactor BranchFactor

x/merkledb/db_test.go

@@ -21,7 +21,6 @@ import (
 	"github.com/ava-labs/avalanchego/database/dbtest"
 	"github.com/ava-labs/avalanchego/database/memdb"
 	"github.com/ava-labs/avalanchego/ids"
-	"github.com/ava-labs/avalanchego/trace"
 	"github.com/ava-labs/avalanchego/utils/hashing"
 	"github.com/ava-labs/avalanchego/utils/maybe"
 	"github.com/ava-labs/avalanchego/utils/set"
@@ -40,19 +39,11 @@ func newDB(ctx context.Context, db database.Database, config Config) (*merkleDB,
 }
 
 func newDefaultConfig() Config {
-	return Config{
-		BranchFactor:                BranchFactor16,
-		Hasher:                      DefaultHasher,
-		RootGenConcurrency:          0,
-		HistoryLength:               defaultHistoryLength,
-		ValueNodeCacheSize:          units.MiB,
-		IntermediateNodeCacheSize:   units.MiB,
-		IntermediateWriteBufferSize: units.KiB,
-		IntermediateWriteBatchSize:  256 * units.KiB,
-		Reg:                         prometheus.NewRegistry(),
-		TraceLevel:                  InfoTrace,
-		Tracer:                      trace.Noop,
-	}
+	config := NewConfig()
+	config.HistoryLength = defaultHistoryLength
+	config.Reg = prometheus.NewRegistry()
+
+	return config
 }
 
 func Test_MerkleDB_Get_Safety(t *testing.T) {

x/merkledb/tracer.go

@@ -7,7 +7,7 @@ import "github.com/ava-labs/avalanchego/trace"
 
 const (
 	DebugTrace TraceLevel = iota - 1
-	InfoTrace             // Default
+	InfoTrace
 	NoTrace
 )