diff --git a/signer/signer.go b/signer/signer.go
new file mode 100644
index 00000000..eeb6e3ae
--- /dev/null
+++ b/signer/signer.go
@@ -0,0 +1,16 @@
+package signer
+
+import (
+	"github.com/cosmos/gogoproto/proto"
+)
+
+type SignerConfig interface {
+	proto.Message
+	Build() (Signer, error)
+	Validate() error
+}
+
+type Signer interface {
+	Sign(digest []byte) (signature []byte, err error)
+	GetPublicKey() ([]byte, error)
+}