Add lotus net scores for pubsub score visibility

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>

node/modules/dtypes/scorekeeper.go

@@ -0,0 +1,24 @@
+package dtypes
+
+import (
+	"sync"
+
+	peer "github.com/libp2p/go-libp2p-peer"
+)
+
+type ScoreKeeper struct {
+	lk     sync.Mutex
+	scores map[peer.ID]float64
+}
+
+func (sk *ScoreKeeper) Update(scores map[peer.ID]float64) {
+	sk.lk.Lock()
+	sk.scores = scores
+	sk.lk.Unlock()
+}
+
+func (sk *ScoreKeeper) Get() map[peer.ID]float64 {
+	sk.lk.Lock()
+	defer sk.lk.Unlock()
+	return sk.scores
+}