[Access] Add new websocket handler and skeleton for its deps

Makefile

@@ -203,10 +203,10 @@ generate-mocks: install-mock-generators
 	mockery --name 'API' --dir="./engine/protocol" --case=underscore --output="./engine/protocol/mock" --outpkg="mock"
 	mockery --name '.*' --dir="./engine/access/state_stream" --case=underscore --output="./engine/access/state_stream/mock" --outpkg="mock"
 	mockery --name 'BlockTracker' --dir="./engine/access/subscription" --case=underscore --output="./engine/access/subscription/mock"  --outpkg="mock"
+	mockery --name 'DataProvider' --dir="./engine/access/rest/websockets/data_provider" --case=underscore --output="./engine/access/rest/websockets/data_provider/mock"  --outpkg="mock"
 	mockery --name 'ExecutionDataTracker' --dir="./engine/access/subscription" --case=underscore --output="./engine/access/subscription/mock"  --outpkg="mock"
 	mockery --name 'ConnectionFactory' --dir="./engine/access/rpc/connection" --case=underscore --output="./engine/access/rpc/connection/mock" --outpkg="mock"
 	mockery --name 'Communicator' --dir="./engine/access/rpc/backend" --case=underscore --output="./engine/access/rpc/backend/mock" --outpkg="mock"
-
 	mockery --name '.*' --dir=model/fingerprint --case=underscore --output="./model/fingerprint/mock" --outpkg="mock"
 	mockery --name 'ExecForkActor' --structname 'ExecForkActorMock' --dir=module/mempool/consensus/mock/ --case=underscore --output="./module/mempool/consensus/mock/" --outpkg="mock"
 	mockery --name '.*' --dir=engine/verification/fetcher/ --case=underscore --output="./engine/verification/fetcher/mock" --outpkg="mockfetcher"

cmd/observer/node_builder/observer_builder.go

@@ -45,6 +45,7 @@ import (
 	restapiproxy "github.com/onflow/flow-go/engine/access/rest/apiproxy"
 	commonrest "github.com/onflow/flow-go/engine/access/rest/common"
 	"github.com/onflow/flow-go/engine/access/rest/router"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	"github.com/onflow/flow-go/engine/access/rpc"
 	"github.com/onflow/flow-go/engine/access/rpc/backend"
 	rpcConnection "github.com/onflow/flow-go/engine/access/rpc/connection"
@@ -168,6 +169,7 @@ type ObserverServiceConfig struct {
 	registerCacheSize                    uint
 	programCacheSize                     uint
 	registerDBPruneThreshold             uint64
+	websocketConfig                      websockets.Config
 }
 
 // DefaultObserverServiceConfig defines all the default values for the ObserverServiceConfig
@@ -252,6 +254,7 @@ func DefaultObserverServiceConfig() *ObserverServiceConfig {
 		registerCacheSize:        0,
 		programCacheSize:         0,
 		registerDBPruneThreshold: pruner.DefaultThreshold,
+		websocketConfig:          websockets.NewDefaultWebsocketConfig(),
 	}
 }
 

cmd/util/cmd/run-script/cmd.go

@@ -16,6 +16,7 @@ import (
 	"github.com/onflow/flow-go/cmd/util/ledger/util"
 	"github.com/onflow/flow-go/cmd/util/ledger/util/registers"
 	"github.com/onflow/flow-go/engine/access/rest"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	"github.com/onflow/flow-go/engine/access/state_stream/backend"
 	"github.com/onflow/flow-go/engine/access/subscription"
 	"github.com/onflow/flow-go/engine/execution/computation"
@@ -169,6 +170,7 @@ func run(*cobra.Command, []string) {
 			metrics.NewNoopCollector(),
 			nil,
 			backend.Config{},
+			websockets.NewDefaultWebsocketConfig(),
 		)
 		if err != nil {
 			log.Fatal().Err(err).Msg("failed to create server")

engine/access/handle_irrecoverable_state_test.go

@@ -23,6 +23,7 @@ import (
 	accessmock "github.com/onflow/flow-go/engine/access/mock"
 	"github.com/onflow/flow-go/engine/access/rest"
 	"github.com/onflow/flow-go/engine/access/rest/router"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	"github.com/onflow/flow-go/engine/access/rpc"
 	"github.com/onflow/flow-go/engine/access/rpc/backend"
 	statestreambackend "github.com/onflow/flow-go/engine/access/state_stream/backend"
@@ -109,6 +110,7 @@ func (suite *IrrecoverableStateTestSuite) SetupTest() {
 		RestConfig: rest.Config{
 			ListenAddress: unittest.DefaultAddress,
 		},
+		WebSocketConfig: websockets.NewDefaultWebsocketConfig(),
 	}
 
 	// generate a server certificate that will be served by the GRPC server

engine/access/integration_unsecure_grpc_server_test.go

@@ -21,6 +21,7 @@ import (
 	"github.com/onflow/flow-go/engine"
 	"github.com/onflow/flow-go/engine/access/index"
 	accessmock "github.com/onflow/flow-go/engine/access/mock"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	"github.com/onflow/flow-go/engine/access/rpc"
 	"github.com/onflow/flow-go/engine/access/rpc/backend"
 	"github.com/onflow/flow-go/engine/access/state_stream"
@@ -138,6 +139,7 @@ func (suite *SameGRPCPortTestSuite) SetupTest() {
 		UnsecureGRPCListenAddr: unittest.DefaultAddress,
 		SecureGRPCListenAddr:   unittest.DefaultAddress,
 		HTTPListenAddr:         unittest.DefaultAddress,
+		WebSocketConfig:        websockets.NewDefaultWebsocketConfig(),
 	}
 
 	blockCount := 5

engine/access/rest/router/router.go

@@ -2,6 +2,7 @@ package router
 
 import (
 	"fmt"
+	"net/http"
 	"regexp"
 	"strings"
 
@@ -10,8 +11,9 @@ import (
 
 	"github.com/onflow/flow-go/access"
 	"github.com/onflow/flow-go/engine/access/rest/common/middleware"
-	"github.com/onflow/flow-go/engine/access/rest/http"
+	flowhttp "github.com/onflow/flow-go/engine/access/rest/http"
 	"github.com/onflow/flow-go/engine/access/rest/http/models"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	legacyws "github.com/onflow/flow-go/engine/access/rest/websockets/legacy"
 	"github.com/onflow/flow-go/engine/access/state_stream"
 	"github.com/onflow/flow-go/engine/access/state_stream/backend"
@@ -54,7 +56,7 @@ func (b *RouterBuilder) AddRestRoutes(
 ) *RouterBuilder {
 	linkGenerator := models.NewLinkGeneratorImpl(b.v1SubRouter)
 	for _, r := range Routes {
-		h := http.NewHandler(b.logger, backend, r.Handler, linkGenerator, chain, maxRequestSize)
+		h := flowhttp.NewHandler(b.logger, backend, r.Handler, linkGenerator, chain, maxRequestSize)
 		b.v1SubRouter.
 			Methods(r.Method).
 			Path(r.Pattern).
@@ -64,8 +66,8 @@ func (b *RouterBuilder) AddRestRoutes(
 	return b
 }
 
-// AddWsLegacyRoutes adds WebSocket routes to the router.
-func (b *RouterBuilder) AddWsLegacyRoutes(
+// AddLegacyWebsocketsRoutes adds WebSocket routes to the router.
+func (b *RouterBuilder) AddLegacyWebsocketsRoutes(
 	stateStreamApi state_stream.API,
 	chain flow.Chain,
 	stateStreamConfig backend.Config,
@@ -84,6 +86,23 @@ func (b *RouterBuilder) AddWsLegacyRoutes(
 	return b
 }
 
+func (b *RouterBuilder) AddWebsocketsRoute(
+	chain flow.Chain,
+	config websockets.Config,
+	streamApi state_stream.API,
+	streamConfig backend.Config,
+	maxRequestSize int64,
+) *RouterBuilder {
+	handler := websockets.NewWebSocketHandler(b.logger, config, chain, streamApi, streamConfig, maxRequestSize)
+	b.v1SubRouter.
+		Methods(http.MethodGet).
+		Path("/ws").
+		Name("ws").
+		Handler(handler)
+
+	return b
+}
+
 func (b *RouterBuilder) Build() *mux.Router {
 	return b.router
 }

engine/access/rest/router/router_test_helpers.go

@@ -135,7 +135,7 @@ func ExecuteRequest(req *http.Request, backend access.API) *httptest.ResponseRec
 	return rr
 }
 
-func ExecuteWsRequest(req *http.Request, stateStreamApi state_stream.API, responseRecorder *TestHijackResponseRecorder, chain flow.Chain) {
+func ExecuteLegacyWsRequest(req *http.Request, stateStreamApi state_stream.API, responseRecorder *TestHijackResponseRecorder, chain flow.Chain) {
 	restCollector := metrics.NewNoopCollector()
 
 	config := backend.Config{
@@ -147,7 +147,7 @@ func ExecuteWsRequest(req *http.Request, stateStreamApi state_stream.API, respon
 	router := NewRouterBuilder(
 		unittest.Logger(),
 		restCollector,
-	).AddWsLegacyRoutes(
+	).AddLegacyWebsocketsRoutes(
 		stateStreamApi,
 		chain, config, common.DefaultMaxRequestSize,
 	).Build()

engine/access/rest/server.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/onflow/flow-go/access"
 	"github.com/onflow/flow-go/engine/access/rest/router"
+	"github.com/onflow/flow-go/engine/access/rest/websockets"
 	"github.com/onflow/flow-go/engine/access/state_stream"
 	"github.com/onflow/flow-go/engine/access/state_stream/backend"
 	"github.com/onflow/flow-go/model/flow"
@@ -42,12 +43,15 @@ func NewServer(serverAPI access.API,
 	restCollector module.RestMetrics,
 	stateStreamApi state_stream.API,
 	stateStreamConfig backend.Config,
+	wsConfig websockets.Config,
 ) (*http.Server, error) {
 	builder := router.NewRouterBuilder(logger, restCollector).AddRestRoutes(serverAPI, chain, config.MaxRequestSize)
 	if stateStreamApi != nil {
-		builder.AddWsLegacyRoutes(stateStreamApi, chain, stateStreamConfig, config.MaxRequestSize)
+		builder.AddLegacyWebsocketsRoutes(stateStreamApi, chain, stateStreamConfig, config.MaxRequestSize)
 	}
 
+	builder.AddWebsocketsRoute(chain, wsConfig, stateStreamApi, stateStreamConfig, config.MaxRequestSize)
+
 	c := cors.New(cors.Options{
 		AllowedOrigins: []string{"*"},
 		AllowedHeaders: []string{"*"},

engine/access/rest/websockets/config.go

@@ -0,0 +1,21 @@
+package websockets
+
+import (
+	"time"
+)
+
+type Config struct {
+	MaxSubscriptionsPerConnection uint64
+	MaxResponsesPerSecond         uint64
+	SendMessageTimeout            time.Duration
+	MaxRequestSize                int64
+}
+
+func NewDefaultWebsocketConfig() Config {
+	return Config{
+		MaxSubscriptionsPerConnection: 1000,
+		MaxResponsesPerSecond:         1000,
+		SendMessageTimeout:            10 * time.Second,
+		MaxRequestSize:                1024,
+	}
+}