graphql: fixes missing tx logs (#25745)

* graphql: fix tx logs

* graphql: refactor test service setup

* graphql: add test for tx logs

graphql/graphql.go

@@ -481,7 +481,7 @@ func (t *Transaction) getLogs(ctx context.Context) (*[]*Log, error) {
 	}
 	var ret []*Log
 	// Select tx logs from all block logs
-	ix := sort.Search(len(logs), func(i int) bool { return uint64(logs[i].TxIndex) == t.index })
+	ix := sort.Search(len(logs), func(i int) bool { return uint64(logs[i].TxIndex) >= t.index })
 	for ix < len(logs) && uint64(logs[ix].TxIndex) == t.index {
 		ret = append(ret, &Log{
 			r:           t.r,

graphql/service.go

@@ -57,17 +57,18 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 // New constructs a new GraphQL service instance.
 func New(stack *node.Node, backend ethapi.Backend, filterSystem *filters.FilterSystem, cors, vhosts []string) error {
-	return newHandler(stack, backend, filterSystem, cors, vhosts)
+	_, err := newHandler(stack, backend, filterSystem, cors, vhosts)
+	return err
 }
 
 // newHandler returns a new `http.Handler` that will answer GraphQL queries.
 // It additionally exports an interactive query browser on the / endpoint.
-func newHandler(stack *node.Node, backend ethapi.Backend, filterSystem *filters.FilterSystem, cors, vhosts []string) error {
+func newHandler(stack *node.Node, backend ethapi.Backend, filterSystem *filters.FilterSystem, cors, vhosts []string) (*handler, error) {
 	q := Resolver{backend, filterSystem}
 
 	s, err := graphql.ParseSchema(schema, &q)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	h := handler{Schema: s}
 	handler := node.NewHTTPHandlerStack(h, cors, vhosts, nil)
@@ -76,5 +77,5 @@ func newHandler(stack *node.Node, backend ethapi.Backend, filterSystem *filters.
 	stack.RegisterHandler("GraphQL", "/graphql", handler)
 	stack.RegisterHandler("GraphQL", "/graphql/", handler)
 
-	return nil
+	return &h, nil
 }