support bytes type

Author: ikehara

pkg/account/abi/bind/primitives.go

@@ -82,6 +82,12 @@ func (s String) Bytes() []byte {
 	return []byte(s)
 }
 
+type Bytes []byte
+
+func (s Bytes) Bytes() []byte {
+	return s
+}
+
 type Address common.Address
 
 func (a Address) Bytes() []byte {

pkg/account/abi/bind/template.go

@@ -125,6 +125,8 @@ func (t Type) BoundType() string {
 		op = "bind.Bool"
 	case StringTy:
 		op = "bind.String"
+	case BytesTy:
+		op = "bind.Bytes"
 	case AddressTy:
 		op = "bind.Address"
 	case HashTy: