[#496] pkg/innerring: provide wrappers to processors

The only thing we need hashes for is to process notifications.
Balance contract if left for now, as it has some initialization.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

pkg/morph/client/netmap/innerring.go

@@ -0,0 +1,13 @@
+package netmap
+
+import "github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+
+// SetInnerRing updates inner ring members in netmap contract.
+func (c *Client) SetInnerRing(keys keys.PublicKeys) error {
+	args := make([][]byte, len(keys))
+	for i := range args {
+		args[i] = keys[i].Bytes()
+	}
+
+	return c.client.Invoke(c.setInnerRing, args)
+}