diff --git a/ethdb/badger_db.go b/ethdb/badger_db.go
index 791695d09..d09955c70 100644
--- a/ethdb/badger_db.go
+++ b/ethdb/badger_db.go
@@ -189,7 +189,7 @@ func (db *BadgerDatabase) DeleteTimestamp(timestamp uint64) error {
 	})
 }
 
-// GetS returns the value that was put into a given historical bucket for an exact timestamp.
+// GetS returns the value that was recorded in a given historical bucket for an exact timestamp.
 func (db *BadgerDatabase) GetS(hBucket, key []byte, timestamp uint64) ([]byte, error) {
 	composite, _ := dbutils.CompositeKeySuffix(key, timestamp)
 	return db.Get(hBucket, composite)
@@ -228,4 +228,13 @@ func (db *BadgerDatabase) GetAsOf(bucket, hBucket, key []byte, timestamp uint64)
 	return dat, err
 }
 
+// Has indicates whether a key exists in the database.
+func (db *BadgerDatabase) Has(bucket, key []byte) (bool, error) {
+	_, err := db.Get(bucket, key)
+	if err == ErrKeyNotFound {
+		return false, nil
+	}
+	return err == nil, err
+}
+
 // TODO [Andrew] implement the full Database interface
diff --git a/ethdb/bolt_db.go b/ethdb/bolt_db.go
index 274436fbf..0a6373d76 100644
--- a/ethdb/bolt_db.go
+++ b/ethdb/bolt_db.go
@@ -182,7 +182,7 @@ func (db *BoltDatabase) Get(bucket, key []byte) ([]byte, error) {
 	return dat, err
 }
 
-// GetS returns the value that was put into a given historical bucket for an exact timestamp.
+// GetS returns the value that was recorded in a given historical bucket for an exact timestamp.
 func (db *BoltDatabase) GetS(hBucket, key []byte, timestamp uint64) ([]byte, error) {
 	composite, _ := dbutils.CompositeKeySuffix(key, timestamp)
 	return db.Get(hBucket, composite)
diff --git a/ethdb/interface.go b/ethdb/interface.go
index 92356643e..4b552f7eb 100644
--- a/ethdb/interface.go
+++ b/ethdb/interface.go
@@ -42,7 +42,7 @@ type Getter interface {
 	// Get returns the value for a given key if it's present.
 	Get(bucket, key []byte) ([]byte, error)
 
-	// GetS returns the value that was put into a given historical bucket for an exact timestamp.
+	// GetS returns the value that was recorded in a given historical bucket for an exact timestamp.
 	// timestamp == block number
 	GetS(hBucket, key []byte, timestamp uint64) ([]byte, error)
 
@@ -50,7 +50,9 @@ type Getter interface {
 	// timestamp == block number
 	GetAsOf(bucket, hBucket, key []byte, timestamp uint64) ([]byte, error)
 
+	// Has indicates whether a key exists in the database.
 	Has(bucket, key []byte) (bool, error)
+
 	Walk(bucket, startkey []byte, fixedbits uint, walker func([]byte, []byte) (bool, error)) error
 	MultiWalk(bucket []byte, startkeys [][]byte, fixedbits []uint, walker func(int, []byte, []byte) (bool, error)) error
 	WalkAsOf(bucket, hBucket, startkey []byte, fixedbits uint, timestamp uint64, walker func([]byte, []byte) (bool, error)) error