explicitly import ipfs-api, declare msg before listen loop

net/net.go

@@ -6,14 +6,17 @@ import (
 	"github.com/vocdoni/dvote-relay/batch"
 	"github.com/vocdoni/dvote-relay/types"
 	"github.com/vocdoni/dvote-relay/data"
+	shell "github.com/ipfs/go-ipfs-api"
 )
 
 
 func Sub(topic string) error {
 	subscription := data.PsSubscribe(topic)
 	fmt.Println("Subscribed > " + topic)
+	var msg shell.PubSubRecord
+	var err error
 	for {
-		msg, err := subscription.Next()
+		msg, err = subscription.Next()
 		if err != nil {
 			return err
 		}