gateway: eth_subscribe support

api/api_full.go

@@ -6,8 +6,6 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/filecoin-project/go-jsonrpc"
-
 	"github.com/google/uuid"
 	blocks "github.com/ipfs/go-block-format"
 	"github.com/ipfs/go-cid"
@@ -18,6 +16,7 @@ import (
 	datatransfer "github.com/filecoin-project/go-data-transfer"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
+	"github.com/filecoin-project/go-jsonrpc"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	"github.com/filecoin-project/go-state-types/builtin/v8/paych"

api/api_gateway.go

@@ -102,6 +102,6 @@ type Gateway interface {
 	EthNewBlockFilter(ctx context.Context) (ethtypes.EthFilterID, error)
 	EthNewPendingTransactionFilter(ctx context.Context) (ethtypes.EthFilterID, error)
 	EthUninstallFilter(ctx context.Context, id ethtypes.EthFilterID) (bool, error)
-	EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error)
+	EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error)
 	EthUnsubscribe(ctx context.Context, id ethtypes.EthSubscriptionID) (bool, error)
 }

api/client/client.go

@@ -35,10 +35,10 @@ func NewFullNodeRPCV0(ctx context.Context, addr string, requestHeader http.Heade
 }
 
 // NewFullNodeRPCV1 creates a new http jsonrpc client.
-func NewFullNodeRPCV1(ctx context.Context, addr string, requestHeader http.Header) (api.FullNode, jsonrpc.ClientCloser, error) {
+func NewFullNodeRPCV1(ctx context.Context, addr string, requestHeader http.Header, opts ...jsonrpc.Option) (api.FullNode, jsonrpc.ClientCloser, error) {
 	var res v1api.FullNodeStruct
 	closer, err := jsonrpc.NewMergeClient(ctx, addr, "Filecoin",
-		api.GetInternalStructs(&res), requestHeader, jsonrpc.WithErrors(api.RPCErrors))
+		api.GetInternalStructs(&res), requestHeader, append([]jsonrpc.Option{jsonrpc.WithErrors(api.RPCErrors)}, opts...)...)
 
 	return &res, closer, err
 }

api/mocks/mock_full.go

@@ -1388,10 +1388,10 @@ func (mr *MockFullNodeMockRecorder) EthSendRawTransaction(arg0, arg1 interface{}
 }
 
 // EthSubscribe mocks base method.
-func (m *MockFullNode) EthSubscribe(arg0 context.Context, arg1 string, arg2 *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error) {
+func (m *MockFullNode) EthSubscribe(arg0 context.Context, arg1 string, arg2 *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "EthSubscribe", arg0, arg1, arg2)
-	ret0, _ := ret[0].(<-chan ethtypes.EthSubscriptionResponse)
+	ret0, _ := ret[0].(ethtypes.EthSubscriptionID)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }

api/proxy_gen.go

@@ -7,6 +7,15 @@ import (
 	"encoding/json"
 	"time"
 
+	"github.com/google/uuid"
+	blocks "github.com/ipfs/go-block-format"
+	"github.com/ipfs/go-cid"
+	"github.com/libp2p/go-libp2p/core/metrics"
+	"github.com/libp2p/go-libp2p/core/network"
+	"github.com/libp2p/go-libp2p/core/peer"
+	"github.com/libp2p/go-libp2p/core/protocol"
+	"golang.org/x/xerrors"
+
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-bitfield"
 	datatransfer "github.com/filecoin-project/go-data-transfer"
@@ -23,6 +32,7 @@ import (
 	"github.com/filecoin-project/go-state-types/dline"
 	abinetwork "github.com/filecoin-project/go-state-types/network"
 	"github.com/filecoin-project/go-state-types/proof"
+
 	apitypes "github.com/filecoin-project/lotus/api/types"
 	builtinactors "github.com/filecoin-project/lotus/chain/actors/builtin"
 	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
@@ -35,14 +45,6 @@ import (
 	"github.com/filecoin-project/lotus/storage/sealer/fsutil"
 	"github.com/filecoin-project/lotus/storage/sealer/sealtasks"
 	"github.com/filecoin-project/lotus/storage/sealer/storiface"
-	"github.com/google/uuid"
-	blocks "github.com/ipfs/go-block-format"
-	"github.com/ipfs/go-cid"
-	"github.com/libp2p/go-libp2p/core/metrics"
-	"github.com/libp2p/go-libp2p/core/network"
-	"github.com/libp2p/go-libp2p/core/peer"
-	"github.com/libp2p/go-libp2p/core/protocol"
-	"golang.org/x/xerrors"
 )
 
 var ErrNotSupported = xerrors.New("method not supported")
@@ -702,7 +704,7 @@ type GatewayMethods struct {
 
 	EthSendRawTransaction func(p0 context.Context, p1 ethtypes.EthBytes) (ethtypes.EthHash, error) ``
 
-	EthSubscribe func(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error) ``
+	EthSubscribe func(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error) ``
 
 	EthUninstallFilter func(p0 context.Context, p1 ethtypes.EthFilterID) (bool, error) ``
 
@@ -4463,15 +4465,15 @@ func (s *GatewayStub) EthSendRawTransaction(p0 context.Context, p1 ethtypes.EthB
 	return *new(ethtypes.EthHash), ErrNotSupported
 }
 
-func (s *GatewayStruct) EthSubscribe(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error) {
+func (s *GatewayStruct) EthSubscribe(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error) {
 	if s.Internal.EthSubscribe == nil {
-		return nil, ErrNotSupported
+		return *new(ethtypes.EthSubscriptionID), ErrNotSupported
 	}
 	return s.Internal.EthSubscribe(p0, p1, p2)
 }
 
-func (s *GatewayStub) EthSubscribe(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error) {
+func (s *GatewayStub) EthSubscribe(p0 context.Context, p1 string, p2 *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error) {
-	return nil, ErrNotSupported
+	return *new(ethtypes.EthSubscriptionID), ErrNotSupported
 }
 
 func (s *GatewayStruct) EthUninstallFilter(p0 context.Context, p1 ethtypes.EthFilterID) (bool, error) {

api/v0api/proxy_gen.go

@@ -5,6 +5,11 @@ package v0api
 import (
 	"context"
 
+	blocks "github.com/ipfs/go-block-format"
+	"github.com/ipfs/go-cid"
+	"github.com/libp2p/go-libp2p/core/peer"
+	"golang.org/x/xerrors"
+
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/go-bitfield"
 	datatransfer "github.com/filecoin-project/go-data-transfer"
@@ -17,6 +22,7 @@ import (
 	"github.com/filecoin-project/go-state-types/crypto"
 	"github.com/filecoin-project/go-state-types/dline"
 	abinetwork "github.com/filecoin-project/go-state-types/network"
+
 	"github.com/filecoin-project/lotus/api"
 	apitypes "github.com/filecoin-project/lotus/api/types"
 	lminer "github.com/filecoin-project/lotus/chain/actors/builtin/miner"
@@ -24,10 +30,6 @@ import (
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 	"github.com/filecoin-project/lotus/node/repo/imports"
-	blocks "github.com/ipfs/go-block-format"
-	"github.com/ipfs/go-cid"
-	"github.com/libp2p/go-libp2p/core/peer"
-	"golang.org/x/xerrors"
 )
 
 var ErrNotSupported = xerrors.New("method not supported")

cli/util/api.go

@@ -319,11 +319,33 @@ func GetFullNodeAPIV1Single(ctx *cli.Context) (v1api.FullNode, jsonrpc.ClientClo
 	return v1API, closer, nil
 }
 
-func GetFullNodeAPIV1(ctx *cli.Context) (v1api.FullNode, jsonrpc.ClientCloser, error) {
+type GetFullNodeOptions struct {
+	ethSubHandler api.EthSubscriber
+}
+
+type GetFullNodeOption func(*GetFullNodeOptions)
+
+func FullNodeWithEthSubscribtionHandler(sh api.EthSubscriber) GetFullNodeOption {
+	return func(opts *GetFullNodeOptions) {
+		opts.ethSubHandler = sh
+	}
+}
+
+func GetFullNodeAPIV1(ctx *cli.Context, opts ...GetFullNodeOption) (v1api.FullNode, jsonrpc.ClientCloser, error) {
 	if tn, ok := ctx.App.Metadata["testnode-full"]; ok {
 		return tn.(v1api.FullNode), func() {}, nil
 	}
 
+	var options GetFullNodeOptions
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	var rpcOpts []jsonrpc.Option
+	if options.ethSubHandler != nil {
+		rpcOpts = append(rpcOpts, jsonrpc.WithClientHandler("Filecoin", options.ethSubHandler), jsonrpc.WithClientHandlerAlias("eth_subscription", "Filecoin.EthSubscription"))
+	}
+
 	heads, err := GetRawAPIMulti(ctx, repo.FullNode, "v1")
 	if err != nil {
 		return nil, nil, err

cmd/lotus-gateway/main.go

@@ -162,7 +162,9 @@ var runCmd = &cli.Command{
 			log.Fatalf("Cannot register the view: %v", err)
 		}
 
-		api, closer, err := lcli.GetFullNodeAPIV1(cctx)
+		subHnd := gateway.NewEthSubHandler()
+
+		api, closer, err := lcli.GetFullNodeAPIV1(cctx, cliutil.FullNodeWithEthSubscribtionHandler(subHnd))
 		if err != nil {
 			return err
 		}
@@ -195,7 +197,7 @@ var runCmd = &cli.Command{
 			return xerrors.Errorf("failed to convert endpoint address to multiaddr: %w", err)
 		}
 
-		gwapi := gateway.NewNode(api, lookbackCap, waitLookback, rateLimit, rateLimitTimeout)
+		gwapi := gateway.NewNode(api, subHnd, lookbackCap, waitLookback, rateLimit, rateLimitTimeout)
 		h, err := gateway.Handler(gwapi, api, perConnRateLimit, connPerMinute, serverOptions...)
 		if err != nil {
 			return xerrors.Errorf("failed to set up gateway HTTP handler")

documentation/en/api-v1-unstable-methods.md

@@ -3073,8 +3073,7 @@ Inputs:
 
 Response:
 ```json
-{
+[
-  "subscription": [
   55,
   105,
   12,
@@ -3107,9 +3106,7 @@ Response:
   39,
   53,
   94
-  ],
+]
-  "result": {}
-}
 ```
 
 ### EthUninstallFilter

gateway/eth_sub.go

@@ -0,0 +1,70 @@
+package gateway
+
+import (
+	"context"
+	"sync"
+
+	"github.com/filecoin-project/go-jsonrpc"
+
+	"github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/chain/types/ethtypes"
+)
+
+type EthSubHandler struct {
+	queued map[ethtypes.EthSubscriptionID][]ethtypes.EthSubscriptionResponse
+	sinks  map[ethtypes.EthSubscriptionID]func(context.Context, *ethtypes.EthSubscriptionResponse) error
+
+	lk sync.Mutex
+}
+
+func NewEthSubHandler() *EthSubHandler {
+	return &EthSubHandler{
+		queued: make(map[ethtypes.EthSubscriptionID][]ethtypes.EthSubscriptionResponse),
+		sinks:  make(map[ethtypes.EthSubscriptionID]func(context.Context, *ethtypes.EthSubscriptionResponse) error),
+	}
+}
+
+func (e *EthSubHandler) addSub(ctx context.Context, id ethtypes.EthSubscriptionID, sink func(context.Context, *ethtypes.EthSubscriptionResponse) error) error {
+	e.lk.Lock()
+	defer e.lk.Unlock()
+
+	for _, p := range e.queued[id] {
+		if err := sink(ctx, &p); err != nil {
+			return err
+		}
+	}
+	delete(e.queued, id)
+	e.sinks[id] = sink
+	return nil
+}
+
+func (e *EthSubHandler) removeSub(id ethtypes.EthSubscriptionID) {
+	e.lk.Lock()
+	defer e.lk.Unlock()
+
+	delete(e.sinks, id)
+	delete(e.queued, id)
+}
+
+func (e *EthSubHandler) EthSubscription(ctx context.Context, r jsonrpc.RawParams) error {
+	p, err := jsonrpc.DecodeParams[ethtypes.EthSubscriptionResponse](r)
+	if err != nil {
+		return err
+	}
+
+	e.lk.Lock()
+
+	sink := e.sinks[p.SubscriptionID]
+
+	if sink == nil {
+		e.queued[p.SubscriptionID] = append(e.queued[p.SubscriptionID], p)
+		e.lk.Unlock()
+		return nil
+	}
+
+	e.lk.Unlock()
+
+	return sink(ctx, &p) // todo track errors and auto-unsubscribe on rpc conn close?
+}
+
+var _ api.EthSubscriber = (*EthSubHandler)(nil)

gateway/handler.go

@@ -27,7 +27,7 @@ const perConnLimiterKey perConnLimiterKeyType = "limiter"
 
 type filterTrackerKeyType string
 
-const filterTrackerKey filterTrackerKeyType = "filterTracker"
+const statefulCallTrackerKey filterTrackerKeyType = "statefulCallTracker"
 
 // Handler returns a gateway http.Handler, to be mounted as-is on the server.
 func Handler(gwapi lapi.Gateway, api lapi.FullNode, rateLimit int64, connPerMinute int64, opts ...jsonrpc.ServerOption) (http.Handler, error) {
@@ -90,7 +90,7 @@ func (h RateLimiterHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	r = r.WithContext(context.WithValue(r.Context(), perConnLimiterKey, h.limiter))
 
 	// also add a filter tracker to the context
-	r = r.WithContext(context.WithValue(r.Context(), filterTrackerKey, newFilterTracker()))
+	r = r.WithContext(context.WithValue(r.Context(), statefulCallTrackerKey, newStatefulCallTracker()))
 
 	h.handler.ServeHTTP(w, r)
 }

gateway/node.go

@@ -117,7 +117,7 @@ type TargetAPI interface {
 	EthNewBlockFilter(ctx context.Context) (ethtypes.EthFilterID, error)
 	EthNewPendingTransactionFilter(ctx context.Context) (ethtypes.EthFilterID, error)
 	EthUninstallFilter(ctx context.Context, id ethtypes.EthFilterID) (bool, error)
-	EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error)
+	EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error)
 	EthUnsubscribe(ctx context.Context, id ethtypes.EthSubscriptionID) (bool, error)
 }
 
@@ -125,6 +125,7 @@ var _ TargetAPI = *new(api.FullNode) // gateway depends on latest
 
 type Node struct {
 	target                 TargetAPI
+	subHnd                 *EthSubHandler
 	lookbackCap            time.Duration
 	stateWaitLookbackLimit abi.ChainEpoch
 	rateLimiter            *rate.Limiter
@@ -141,7 +142,7 @@ var (
 )
 
 // NewNode creates a new gateway node.
-func NewNode(api TargetAPI, lookbackCap time.Duration, stateWaitLookbackLimit abi.ChainEpoch, rateLimit int64, rateLimitTimeout time.Duration) *Node {
+func NewNode(api TargetAPI, sHnd *EthSubHandler, lookbackCap time.Duration, stateWaitLookbackLimit abi.ChainEpoch, rateLimit int64, rateLimitTimeout time.Duration) *Node {
 	var limit rate.Limit
 	if rateLimit == 0 {
 		limit = rate.Inf
@@ -150,6 +151,7 @@ func NewNode(api TargetAPI, lookbackCap time.Duration, stateWaitLookbackLimit ab
 	}
 	return &Node{
 		target:                 api,
+		subHnd:                 sHnd,
 		lookbackCap:            lookbackCap,
 		stateWaitLookbackLimit: stateWaitLookbackLimit,
 		rateLimiter:            rate.NewLimiter(limit, stateRateLimitTokens),

gateway/node_test.go

@@ -89,7 +89,7 @@ func TestGatewayAPIChainGetTipSetByHeight(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			mock := &mockGatewayDepsAPI{}
-			a := NewNode(mock, DefaultLookbackCap, DefaultStateWaitLookbackLimit, 0, time.Minute)
+			a := NewNode(mock, nil, DefaultLookbackCap, DefaultStateWaitLookbackLimit, 0, time.Minute)
 
 			// Create tipsets from genesis up to tskh and return the highest
 			ts := mock.createTipSets(tt.args.tskh, tt.args.genesisTS)
@@ -245,7 +245,7 @@ func TestGatewayVersion(t *testing.T) {
 	//stm: @GATEWAY_NODE_GET_VERSION_001
 	ctx := context.Background()
 	mock := &mockGatewayDepsAPI{}
-	a := NewNode(mock, DefaultLookbackCap, DefaultStateWaitLookbackLimit, 0, time.Minute)
+	a := NewNode(mock, nil, DefaultLookbackCap, DefaultStateWaitLookbackLimit, 0, time.Minute)
 
 	v, err := a.Version(ctx)
 	require.NoError(t, err)
@@ -256,7 +256,7 @@ func TestGatewayLimitTokensAvailable(t *testing.T) {
 	ctx := context.Background()
 	mock := &mockGatewayDepsAPI{}
 	tokens := 3
-	a := NewNode(mock, DefaultLookbackCap, DefaultStateWaitLookbackLimit, int64(tokens), time.Minute)
+	a := NewNode(mock, nil, DefaultLookbackCap, DefaultStateWaitLookbackLimit, int64(tokens), time.Minute)
 	require.NoError(t, a.limit(ctx, tokens), "requests should not be limited when there are enough tokens available")
 }
 
@@ -264,7 +264,7 @@ func TestGatewayLimitTokensNotAvailable(t *testing.T) {
 	ctx := context.Background()
 	mock := &mockGatewayDepsAPI{}
 	tokens := 3
-	a := NewNode(mock, DefaultLookbackCap, DefaultStateWaitLookbackLimit, int64(1), time.Millisecond)
+	a := NewNode(mock, nil, DefaultLookbackCap, DefaultStateWaitLookbackLimit, int64(1), time.Millisecond)
 	var err error
 	// try to be rate limited
 	for i := 0; i <= 1000; i++ {

gateway/proxy_eth.go

@@ -3,12 +3,14 @@ package gateway
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
 	"sync"
 	"time"
 
 	"golang.org/x/xerrors"
 
+	"github.com/filecoin-project/go-jsonrpc"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 
@@ -352,7 +354,7 @@ func (gw *Node) EthGetFilterChanges(ctx context.Context, id ethtypes.EthFilterID
 		return nil, err
 	}
 
-	ft := filterTrackerFromContext(ctx)
+	ft := statefulCallFromContext(ctx)
 	ft.lk.Lock()
 	_, ok := ft.userFilters[id]
 	ft.lk.Unlock()
@@ -369,7 +371,7 @@ func (gw *Node) EthGetFilterLogs(ctx context.Context, id ethtypes.EthFilterID) (
 		return nil, err
 	}
 
-	ft := filterTrackerFromContext(ctx)
+	ft := statefulCallFromContext(ctx)
 	ft.lk.Lock()
 	_, ok := ft.userFilters[id]
 	ft.lk.Unlock()
@@ -417,7 +419,7 @@ func (gw *Node) EthUninstallFilter(ctx context.Context, id ethtypes.EthFilterID)
 	}
 
 	// check if the filter belongs to this connection
-	ft := filterTrackerFromContext(ctx)
+	ft := statefulCallFromContext(ctx)
 	ft.lk.Lock()
 	defer ft.lk.Unlock()
 
@@ -434,18 +436,82 @@ func (gw *Node) EthUninstallFilter(ctx context.Context, id ethtypes.EthFilterID)
 	return ok, nil
 }
 
-func (gw *Node) EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (<-chan ethtypes.EthSubscriptionResponse, error) {
+func (gw *Node) EthSubscribe(ctx context.Context, eventType string, params *ethtypes.EthSubscriptionParams) (ethtypes.EthSubscriptionID, error) {
-	return nil, xerrors.Errorf("not implemented")
+	if err := gw.limit(ctx, stateRateLimitTokens); err != nil {
+		return ethtypes.EthSubscriptionID{}, err
+	}
+
+	if gw.subHnd == nil {
+		return ethtypes.EthSubscriptionID{}, xerrors.New("subscription support not enabled")
+	}
+
+	ethCb, ok := jsonrpc.ExtractReverseClient[api.EthSubscriberMethods](ctx)
+	if !ok {
+		return ethtypes.EthSubscriptionID{}, xerrors.Errorf("connection doesn't support callbacks")
+	}
+
+	ft := statefulCallFromContext(ctx)
+	ft.lk.Lock()
+	defer ft.lk.Unlock()
+
+	if len(ft.userSubscriptions) >= EthMaxFiltersPerConn {
+		return ethtypes.EthSubscriptionID{}, fmt.Errorf("too many subscriptions")
+	}
+
+	sub, err := gw.target.EthSubscribe(ctx, eventType, params)
+	if err != nil {
+		return ethtypes.EthSubscriptionID{}, err
+	}
+
+	err = gw.subHnd.addSub(ctx, sub, func(ctx context.Context, response *ethtypes.EthSubscriptionResponse) error {
+		outParam, err := json.Marshal(response)
+		if err != nil {
+			return err
+		}
+
+		return ethCb.EthSubscription(ctx, outParam)
+	})
+	if err != nil {
+		return ethtypes.EthSubscriptionID{}, err
+	}
+
+	ft.userSubscriptions[sub] = time.Now()
+
+	return sub, err
 }
 
 func (gw *Node) EthUnsubscribe(ctx context.Context, id ethtypes.EthSubscriptionID) (bool, error) {
-	return false, xerrors.Errorf("not implemented")
+	if err := gw.limit(ctx, stateRateLimitTokens); err != nil {
+		return false, err
+	}
+
+	// check if the filter belongs to this connection
+	ft := statefulCallFromContext(ctx)
+	ft.lk.Lock()
+	defer ft.lk.Unlock()
+
+	if _, ok := ft.userSubscriptions[id]; !ok {
+		return false, nil
+	}
+
+	ok, err := gw.target.EthUnsubscribe(ctx, id)
+	if err != nil {
+		return false, err
+	}
+
+	delete(ft.userSubscriptions, id)
+
+	if gw.subHnd != nil {
+		gw.subHnd.removeSub(id)
+	}
+
+	return ok, nil
 }
 
 var EthMaxFiltersPerConn = 16 // todo make this configurable
 
 func addUserFilterLimited(ctx context.Context, cb func() (ethtypes.EthFilterID, error)) (ethtypes.EthFilterID, error) {
-	ft := filterTrackerFromContext(ctx)
+	ft := statefulCallFromContext(ctx)
 	ft.lk.Lock()
 	defer ft.lk.Unlock()
 
@@ -463,19 +529,21 @@ func addUserFilterLimited(ctx context.Context, cb func() (ethtypes.EthFilterID,
 	return id, nil
 }
 
-func filterTrackerFromContext(ctx context.Context) *filterTracker {
+func statefulCallFromContext(ctx context.Context) *statefulCallTracker {
-	return ctx.Value(filterTrackerKey).(*filterTracker)
+	return ctx.Value(statefulCallTrackerKey).(*statefulCallTracker)
 }
 
-type filterTracker struct {
+type statefulCallTracker struct {
 	lk sync.Mutex
 
 	userFilters       map[ethtypes.EthFilterID]time.Time
+	userSubscriptions map[ethtypes.EthSubscriptionID]time.Time
 }
 
 // called per request (ws connection)
-func newFilterTracker() *filterTracker {
+func newStatefulCallTracker() *statefulCallTracker {
-	return &filterTracker{
+	return &statefulCallTracker{
 		userFilters:       make(map[ethtypes.EthFilterID]time.Time),
+		userSubscriptions: make(map[ethtypes.EthSubscriptionID]time.Time),
 	}
 }

go.mod

@@ -40,7 +40,7 @@ require (
 	github.com/filecoin-project/go-fil-commcid v0.1.0
 	github.com/filecoin-project/go-fil-commp-hashhash v0.1.0
 	github.com/filecoin-project/go-fil-markets v1.25.2
-	github.com/filecoin-project/go-jsonrpc v0.1.10-0.20230116095704-da92324a76e1
+	github.com/filecoin-project/go-jsonrpc v0.2.0
 	github.com/filecoin-project/go-legs v0.4.4
 	github.com/filecoin-project/go-padreader v0.0.1
 	github.com/filecoin-project/go-paramfetch v0.0.4

go.sum

@@ -340,10 +340,8 @@ github.com/filecoin-project/go-hamt-ipld/v2 v2.0.0/go.mod h1:7aWZdaQ1b16BVoQUYR+
 github.com/filecoin-project/go-hamt-ipld/v3 v3.0.1/go.mod h1:gXpNmr3oQx8l3o7qkGyDjJjYSRX7hp/FGOStdqrWyDI=
 github.com/filecoin-project/go-hamt-ipld/v3 v3.1.0 h1:rVVNq0x6RGQIzCo1iiJlGFm9AGIZzeifggxtKMU7zmI=
 github.com/filecoin-project/go-hamt-ipld/v3 v3.1.0/go.mod h1:bxmzgT8tmeVQA1/gvBwFmYdT8SOFUwB3ovSUfG1Ux0g=
-github.com/filecoin-project/go-jsonrpc v0.1.9 h1:HRWLxo7HAWzI3xZGeFG4LZJoYpms+Q+8kwmMTLnyS3A=
+github.com/filecoin-project/go-jsonrpc v0.2.0 h1:lhcu0Oa7xxwdclU4EyBPgnZihiZOaTFiAnW6P3NRqko=
-github.com/filecoin-project/go-jsonrpc v0.1.9/go.mod h1:XBBpuKIMaXIIzeqzO1iucq4GvbF8CxmXRFoezRh+Cx4=
+github.com/filecoin-project/go-jsonrpc v0.2.0/go.mod h1:jBSvPTl8V1N7gSTuCR4bis8wnQnIjHbRPpROol6iQKM=
-github.com/filecoin-project/go-jsonrpc v0.1.10-0.20230116095704-da92324a76e1 h1:GcF3gSvesv1epB2SrTfalrYvhFzT1UnmSS1Bh+jprQY=
-github.com/filecoin-project/go-jsonrpc v0.1.10-0.20230116095704-da92324a76e1/go.mod h1:jBSvPTl8V1N7gSTuCR4bis8wnQnIjHbRPpROol6iQKM=
 github.com/filecoin-project/go-legs v0.4.4 h1:mpMmAOOnamaz0CV9rgeKhEWA8j9kMC+f+UGCGrxKaZo=
 github.com/filecoin-project/go-legs v0.4.4/go.mod h1:JQ3hA6xpJdbR8euZ2rO0jkxaMxeidXf0LDnVuqPAe9s=
 github.com/filecoin-project/go-padreader v0.0.0-20200903213702-ed5fae088b20/go.mod h1:mPn+LRRd5gEKNAtc+r3ScpW2JRU/pj4NBKdADYWHiak=
@@ -826,7 +824,6 @@ github.com/ipfs/go-log/v2 v2.0.1/go.mod h1:O7P1lJt27vWHhOwQmcFEvlmo49ry2VY2+JfBW
 github.com/ipfs/go-log/v2 v2.0.2/go.mod h1:O7P1lJt27vWHhOwQmcFEvlmo49ry2VY2+JfBWFaa9+0=
 github.com/ipfs/go-log/v2 v2.0.3/go.mod h1:O7P1lJt27vWHhOwQmcFEvlmo49ry2VY2+JfBWFaa9+0=
 github.com/ipfs/go-log/v2 v2.0.5/go.mod h1:eZs4Xt4ZUJQFM3DlanGhy7TkwwawCZcSByscwkWG+dw=
-github.com/ipfs/go-log/v2 v2.0.8/go.mod h1:eZs4Xt4ZUJQFM3DlanGhy7TkwwawCZcSByscwkWG+dw=
 github.com/ipfs/go-log/v2 v2.1.1/go.mod h1:2v2nsGfZsvvAJz13SyFzf9ObaqwHiHxsPLEHntrv9KM=
 github.com/ipfs/go-log/v2 v2.1.2-0.20200626104915-0016c0b4b3e4/go.mod h1:2v2nsGfZsvvAJz13SyFzf9ObaqwHiHxsPLEHntrv9KM=
 github.com/ipfs/go-log/v2 v2.1.2/go.mod h1:2v2nsGfZsvvAJz13SyFzf9ObaqwHiHxsPLEHntrv9KM=

itests/gateway_test.go

@@ -290,7 +290,7 @@ func startNodes(
 	ens.InterconnectAll().BeginMining(blocktime)
 
 	// Create a gateway server in front of the full node
-	gwapi := gateway.NewNode(full, lookbackCap, stateWaitLookbackLimit, 0, time.Minute)
+	gwapi := gateway.NewNode(full, nil, lookbackCap, stateWaitLookbackLimit, 0, time.Minute)
 	handler, err := gateway.Handler(gwapi, full, 0, 0)
 	require.NoError(t, err)
 

node/impl/full/eth.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/filecoin-project/go-jsonrpc"
 	"strconv"
 	"sync"
 	"time"
@@ -18,6 +17,7 @@ import (
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-jsonrpc"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-state-types/big"
 	builtintypes "github.com/filecoin-project/go-state-types/builtin"