feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/missinggo/multiless.go

@@ -0,0 +1,47 @@
+package missinggo
+
+type (
+	SameLessFunc func() (same, less bool)
+	MultiLess    struct {
+		ok   bool
+		less bool
+	}
+)
+
+func (me *MultiLess) Less() bool {
+	return me.ok && me.less
+}
+
+func (me *MultiLess) Final() bool {
+	if !me.ok {
+		panic("undetermined")
+	}
+	return me.less
+}
+
+func (me *MultiLess) FinalOk() (left, ok bool) {
+	return me.less, me.ok
+}
+
+func (me *MultiLess) Next(f SameLessFunc) {
+	if me.ok {
+		return
+	}
+	same, less := f()
+	if same {
+		return
+	}
+	me.ok = true
+	me.less = less
+}
+
+func (me *MultiLess) StrictNext(same, less bool) {
+	if me.ok {
+		return
+	}
+	me.Next(func() (bool, bool) { return same, less })
+}
+
+func (me *MultiLess) NextBool(l, r bool) {
+	me.StrictNext(l == r, l)
+}