accounts/abi: ABI fixes & added types

Changed field `input` to new `inputs`. Addad Hash and Address as input
types.

Added bytes[N] and N validation

accounts/abi/type.go

@@ -43,7 +43,7 @@ type Type struct {
 	stringKind string // holds the unparsed string for deriving signatures
 }
 
-// New type returns a fully parsed Type given by the input string or an error if it  can't be parsed.
+// NewType returns a fully parsed Type given by the input string or an error if it  can't be parsed.
 //
 // Strings can be in the format of:
 //
@@ -130,6 +130,10 @@ func NewType(t string) (typ Type, err error) {
 			if vsize > 0 {
 				typ.Size = 32
 			}
+		case "bytes":
+			typ.Kind = reflect.Slice
+			typ.Type = byte_ts
+			typ.Size = vsize
 		default:
 			return Type{}, fmt.Errorf("unsupported arg type: %s", t)
 		}
@@ -200,7 +204,13 @@ func (t Type) pack(v interface{}) ([]byte, error) {
 		} else {
 			return common.LeftPadBytes(common.Big0.Bytes(), 32), nil
 		}
+	case reflect.Array:
+		if v, ok := value.Interface().(common.Address); ok {
+			return t.pack(v[:])
+		} else if v, ok := value.Interface().(common.Hash); ok {
+			return t.pack(v[:])
+		}
 	}
 
-	panic("unreached")
+	return nil, fmt.Errorf("ABI: bad input given %T", value.Kind())
 }