[#21] Add neofs config event

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/morph/event/neofs/config.go

@@ -0,0 +1,45 @@
+package neofs
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	"github.com/pkg/errors"
+)
+
+type Config struct {
+	key   []byte
+	value []byte
+}
+
+// MorphEvent implements Neo:Morph Event interface.
+func (Config) MorphEvent() {}
+
+func (u Config) Key() []byte { return u.key }
+
+func (u Config) Value() []byte { return u.value }
+
+func ParseConfig(params []smartcontract.Parameter) (event.Event, error) {
+	var (
+		ev  Config
+		err error
+	)
+
+	if ln := len(params); ln != 2 {
+		return nil, event.WrongNumberOfParameters(2, ln)
+	}
+
+	// parse key
+	ev.key, err = client.BytesFromStackParameter(params[0])
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get config key")
+	}
+
+	// parse value
+	ev.value, err = client.BytesFromStackParameter(params[1])
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get config value")
+	}
+
+	return ev, nil
+}

pkg/morph/event/neofs/config_test.go

@@ -0,0 +1,68 @@
+package neofs
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseConfig(t *testing.T) {
+	var (
+		key   = []byte("key")
+		value = []byte("value")
+	)
+
+	t.Run("wrong number of parameters", func(t *testing.T) {
+		prms := []smartcontract.Parameter{
+			{},
+		}
+
+		_, err := ParseConfig(prms)
+		require.EqualError(t, err, event.WrongNumberOfParameters(2, len(prms)).Error())
+	})
+
+	t.Run("wrong first parameter", func(t *testing.T) {
+		_, err := ParseConfig([]smartcontract.Parameter{
+			{
+				Type: smartcontract.ArrayType,
+			},
+		})
+
+		require.Error(t, err)
+	})
+
+	t.Run("wrong second parameter", func(t *testing.T) {
+		_, err := ParseConfig([]smartcontract.Parameter{
+			{
+				Type:  smartcontract.ByteArrayType,
+				Value: key,
+			},
+			{
+				Type: smartcontract.ArrayType,
+			},
+		})
+
+		require.Error(t, err)
+	})
+
+	t.Run("correct", func(t *testing.T) {
+		ev, err := ParseConfig([]smartcontract.Parameter{
+			{
+				Type:  smartcontract.ByteArrayType,
+				Value: key,
+			},
+			{
+				Type:  smartcontract.ByteArrayType,
+				Value: value,
+			},
+		})
+		require.NoError(t, err)
+
+		require.Equal(t, Config{
+			key:   key,
+			value: value,
+		}, ev)
+	})
+}