[#36] Add default capacity and price attributes

Default values for capacity and price will be 0, so storage node
won't be present in placement. Add these attributes if they are
not explicitly set up by user config.

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

cmd/neofs-node/morph.go

@@ -1,6 +1,9 @@
 package main
 
 import (
+	"strconv"
+
+	sdk "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	v2netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
@@ -37,6 +40,8 @@ func bootstrapNode(c *cfg) {
 			fatalOnErr(errors.Wrap(err, "bootstrap attribute error"))
 		}
 
+		attrs = addWellKnownAttributes(c, attrs)
+
 		peerInfo := new(v2netmap.NodeInfo)
 		peerInfo.SetAddress(c.viper.GetString(cfgBootstrapAddress))
 		peerInfo.SetPublicKey(crypto.MarshalPublicKey(&c.key.PublicKey))
@@ -46,3 +51,34 @@ func bootstrapNode(c *cfg) {
 		fatalOnErr(errors.Wrap(err, "bootstrap error"))
 	}
 }
+
+func addWellKnownAttributes(c *cfg, attrs []*v2netmap.Attribute) []*v2netmap.Attribute {
+	var hasCapacity, hasPrice bool
+
+	// check if user defined capacity and price attributes
+	for i := range attrs {
+		if !hasPrice && attrs[i].GetKey() == sdk.PriceAttr {
+			hasPrice = true
+		} else if !hasCapacity && attrs[i].GetKey() == sdk.CapacityAttr {
+			hasCapacity = true
+		}
+	}
+
+	// do not override user defined capacity and price attributes
+
+	if !hasCapacity {
+		capacity := new(v2netmap.Attribute)
+		capacity.SetKey(sdk.CapacityAttr)
+		capacity.SetValue(strconv.FormatUint(c.cfgNodeInfo.capacity, 10))
+		attrs = append(attrs, capacity)
+	}
+
+	if !hasPrice {
+		price := new(v2netmap.Attribute)
+		price.SetKey(sdk.PriceAttr)
+		price.SetValue(strconv.FormatUint(c.cfgNodeInfo.price, 10))
+		attrs = append(attrs, price)
+	}
+
+	return attrs
+}