Update dependencies

- uses newer version of go-ethereum required for go1.11

vendor/github.com/ethereum/go-ethereum/rpc/client.go

@@ -25,6 +25,7 @@ import (
 	"fmt"
 	"net"
 	"net/url"
+	"os"
 	"reflect"
 	"strconv"
 	"strings"
@@ -60,7 +61,7 @@ const (
 	// The approach taken here is to maintain a per-subscription linked list buffer
 	// shrinks on demand. If the buffer reaches the size below, the subscription is
 	// dropped.
-	maxClientSubscriptionBuffer = 8000
+	maxClientSubscriptionBuffer = 20000
 )
 
 // BatchElem is an element in a batch request.
@@ -171,6 +172,8 @@ func DialContext(ctx context.Context, rawurl string) (*Client, error) {
 		return DialHTTP(rawurl)
 	case "ws", "wss":
 		return DialWebsocket(ctx, rawurl, "")
+	case "stdio":
+		return DialStdIO(ctx)
 	case "":
 		return DialIPC(ctx, rawurl)
 	default:
@@ -178,13 +181,51 @@ func DialContext(ctx context.Context, rawurl string) (*Client, error) {
 	}
 }
 
+type StdIOConn struct{}
+
+func (io StdIOConn) Read(b []byte) (n int, err error) {
+	return os.Stdin.Read(b)
+}
+
+func (io StdIOConn) Write(b []byte) (n int, err error) {
+	return os.Stdout.Write(b)
+}
+
+func (io StdIOConn) Close() error {
+	return nil
+}
+
+func (io StdIOConn) LocalAddr() net.Addr {
+	return &net.UnixAddr{Name: "stdio", Net: "stdio"}
+}
+
+func (io StdIOConn) RemoteAddr() net.Addr {
+	return &net.UnixAddr{Name: "stdio", Net: "stdio"}
+}
+
+func (io StdIOConn) SetDeadline(t time.Time) error {
+	return &net.OpError{Op: "set", Net: "stdio", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
+}
+
+func (io StdIOConn) SetReadDeadline(t time.Time) error {
+	return &net.OpError{Op: "set", Net: "stdio", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
+}
+
+func (io StdIOConn) SetWriteDeadline(t time.Time) error {
+	return &net.OpError{Op: "set", Net: "stdio", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
+}
+func DialStdIO(ctx context.Context) (*Client, error) {
+	return newClient(ctx, func(_ context.Context) (net.Conn, error) {
+		return StdIOConn{}, nil
+	})
+}
+
 func newClient(initctx context.Context, connectFunc func(context.Context) (net.Conn, error)) (*Client, error) {
 	conn, err := connectFunc(initctx)
 	if err != nil {
 		return nil, err
 	}
 	_, isHTTP := conn.(*httpConn)
-
 	c := &Client{
 		writeConn:   conn,
 		isHTTP:      isHTTP,
@@ -263,7 +304,7 @@ func (c *Client) CallContext(ctx context.Context, result interface{}, method str
 		return err
 	}
 
-	// dispatch has accepted the request and will close the channel it when it quits.
+	// dispatch has accepted the request and will close the channel when it quits.
 	switch resp, err := op.wait(ctx); {
 	case err != nil:
 		return err
@@ -524,13 +565,13 @@ func (c *Client) dispatch(conn net.Conn) {
 			}
 
 		case err := <-c.readErr:
-			log.Debug(fmt.Sprintf("<-readErr: %v", err))
+			log.Debug("<-readErr", "err", err)
 			c.closeRequestOps(err)
 			conn.Close()
 			reading = false
 
 		case newconn := <-c.reconnected:
-			log.Debug(fmt.Sprintf("<-reconnected: (reading=%t) %v", reading, conn.RemoteAddr()))
+			log.Debug("<-reconnected", "reading", reading, "remote", conn.RemoteAddr())
 			if reading {
 				// Wait for the previous read loop to exit. This is a rare case.
 				conn.Close()
@@ -587,7 +628,7 @@ func (c *Client) closeRequestOps(err error) {
 
 func (c *Client) handleNotification(msg *jsonrpcMessage) {
 	if !strings.HasSuffix(msg.Method, notificationMethodSuffix) {
-		log.Debug(fmt.Sprint("dropping non-subscription message: ", msg))
+		log.Debug("dropping non-subscription message", "msg", msg)
 		return
 	}
 	var subResult struct {
@@ -595,7 +636,7 @@ func (c *Client) handleNotification(msg *jsonrpcMessage) {
 		Result json.RawMessage `json:"result"`
 	}
 	if err := json.Unmarshal(msg.Params, &subResult); err != nil {
-		log.Debug(fmt.Sprint("dropping invalid subscription message: ", msg))
+		log.Debug("dropping invalid subscription message", "msg", msg)
 		return
 	}
 	if c.subs[subResult.ID] != nil {
@@ -606,7 +647,7 @@ func (c *Client) handleNotification(msg *jsonrpcMessage) {
 func (c *Client) handleResponse(msg *jsonrpcMessage) {
 	op := c.respWait[string(msg.ID)]
 	if op == nil {
-		log.Debug(fmt.Sprintf("unsolicited response %v", msg))
+		log.Debug("unsolicited response", "msg", msg)
 		return
 	}
 	delete(c.respWait, string(msg.ID))

vendor/github.com/ethereum/go-ethereum/rpc/client_example_test.go

@@ -66,7 +66,7 @@ func subscribeBlocks(client *rpc.Client, subch chan Block) {
 	defer cancel()
 
 	// Subscribe to new blocks.
-	sub, err := client.EthSubscribe(ctx, subch, "newBlocks")
+	sub, err := client.EthSubscribe(ctx, subch, "newHeads")
 	if err != nil {
 		fmt.Println("subscribe error:", err)
 		return

vendor/github.com/ethereum/go-ethereum/rpc/doc.go

@@ -58,7 +58,7 @@ An example server which uses the JSON codec:
 	return a + b
  }
 
- func (s *CalculatorService Div(a, b int) (int, error) {
+ func (s *CalculatorService) Div(a, b int) (int, error) {
 	if b == 0 {
 		return 0, errors.New("divide by zero")
 	}
@@ -92,7 +92,7 @@ An example method:
 Subscriptions are deleted when:
  - the user sends an unsubscribe request
  - the connection which was used to create the subscription is closed. This can be initiated
-   by the client and server. The server will close the connection on an write error or when
+   by the client and server. The server will close the connection on a write error or when
    the queue of buffered notifications gets too big.
 */
 package rpc

vendor/github.com/ethereum/go-ethereum/rpc/endpoints.go

@@ -0,0 +1,102 @@
+// Copyright 2018 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package rpc
+
+import (
+	"net"
+
+	"github.com/ethereum/go-ethereum/log"
+)
+
+// StartHTTPEndpoint starts the HTTP RPC endpoint, configured with cors/vhosts/modules
+func StartHTTPEndpoint(endpoint string, apis []API, modules []string, cors []string, vhosts []string, timeouts HTTPTimeouts) (net.Listener, *Server, error) {
+	// Generate the whitelist based on the allowed modules
+	whitelist := make(map[string]bool)
+	for _, module := range modules {
+		whitelist[module] = true
+	}
+	// Register all the APIs exposed by the services
+	handler := NewServer()
+	for _, api := range apis {
+		if whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
+			if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
+				return nil, nil, err
+			}
+			log.Debug("HTTP registered", "namespace", api.Namespace)
+		}
+	}
+	// All APIs registered, start the HTTP listener
+	var (
+		listener net.Listener
+		err      error
+	)
+	if listener, err = net.Listen("tcp", endpoint); err != nil {
+		return nil, nil, err
+	}
+	go NewHTTPServer(cors, vhosts, timeouts, handler).Serve(listener)
+	return listener, handler, err
+}
+
+// StartWSEndpoint starts a websocket endpoint
+func StartWSEndpoint(endpoint string, apis []API, modules []string, wsOrigins []string, exposeAll bool) (net.Listener, *Server, error) {
+
+	// Generate the whitelist based on the allowed modules
+	whitelist := make(map[string]bool)
+	for _, module := range modules {
+		whitelist[module] = true
+	}
+	// Register all the APIs exposed by the services
+	handler := NewServer()
+	for _, api := range apis {
+		if exposeAll || whitelist[api.Namespace] || (len(whitelist) == 0 && api.Public) {
+			if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
+				return nil, nil, err
+			}
+			log.Debug("WebSocket registered", "service", api.Service, "namespace", api.Namespace)
+		}
+	}
+	// All APIs registered, start the HTTP listener
+	var (
+		listener net.Listener
+		err      error
+	)
+	if listener, err = net.Listen("tcp", endpoint); err != nil {
+		return nil, nil, err
+	}
+	go NewWSServer(wsOrigins, handler).Serve(listener)
+	return listener, handler, err
+
+}
+
+// StartIPCEndpoint starts an IPC endpoint.
+func StartIPCEndpoint(ipcEndpoint string, apis []API) (net.Listener, *Server, error) {
+	// Register all the APIs exposed by the services.
+	handler := NewServer()
+	for _, api := range apis {
+		if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
+			return nil, nil, err
+		}
+		log.Debug("IPC registered", "namespace", api.Namespace)
+	}
+	// All APIs registered, start the IPC listener.
+	listener, err := ipcListen(ipcEndpoint)
+	if err != nil {
+		return nil, nil, err
+	}
+	go handler.ServeListener(listener)
+	return listener, handler, nil
+}

vendor/github.com/ethereum/go-ethereum/rpc/http.go

@@ -27,16 +27,17 @@ import (
 	"mime"
 	"net"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
+	"github.com/ethereum/go-ethereum/log"
 	"github.com/rs/cors"
-	"strings"
 )
 
 const (
-	contentType                 = "application/json"
-	maxHTTPRequestContentLength = 1024 * 128
+	contentType             = "application/json"
+	maxRequestContentLength = 1024 * 128
 )
 
 var nullAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:0")
@@ -66,6 +67,38 @@ func (hc *httpConn) Close() error {
 	return nil
 }
 
+// HTTPTimeouts represents the configuration params for the HTTP RPC server.
+type HTTPTimeouts struct {
+	// ReadTimeout is the maximum duration for reading the entire
+	// request, including the body.
+	//
+	// Because ReadTimeout does not let Handlers make per-request
+	// decisions on each request body's acceptable deadline or
+	// upload rate, most users will prefer to use
+	// ReadHeaderTimeout. It is valid to use them both.
+	ReadTimeout time.Duration
+
+	// WriteTimeout is the maximum duration before timing out
+	// writes of the response. It is reset whenever a new
+	// request's header is read. Like ReadTimeout, it does not
+	// let Handlers make decisions on a per-request basis.
+	WriteTimeout time.Duration
+
+	// IdleTimeout is the maximum amount of time to wait for the
+	// next request when keep-alives are enabled. If IdleTimeout
+	// is zero, the value of ReadTimeout is used. If both are
+	// zero, ReadHeaderTimeout is used.
+	IdleTimeout time.Duration
+}
+
+// DefaultHTTPTimeouts represents the default timeout values used if further
+// configuration is not provided.
+var DefaultHTTPTimeouts = HTTPTimeouts{
+	ReadTimeout:  30 * time.Second,
+	WriteTimeout: 30 * time.Second,
+	IdleTimeout:  120 * time.Second,
+}
+
 // DialHTTPWithClient creates a new RPC client that connects to an RPC server over HTTP
 // using the provided HTTP Client.
 func DialHTTPWithClient(endpoint string, client *http.Client) (*Client, error) {
@@ -90,10 +123,19 @@ func DialHTTP(endpoint string) (*Client, error) {
 func (c *Client) sendHTTP(ctx context.Context, op *requestOp, msg interface{}) error {
 	hc := c.writeConn.(*httpConn)
 	respBody, err := hc.doRequest(ctx, msg)
+	if respBody != nil {
+		defer respBody.Close()
+	}
+
 	if err != nil {
+		if respBody != nil {
+			buf := new(bytes.Buffer)
+			if _, err2 := buf.ReadFrom(respBody); err2 == nil {
+				return fmt.Errorf("%v %v", err, buf.String())
+			}
+		}
 		return err
 	}
-	defer respBody.Close()
 	var respmsg jsonrpcMessage
 	if err := json.NewDecoder(respBody).Decode(&respmsg); err != nil {
 		return err
@@ -132,6 +174,9 @@ func (hc *httpConn) doRequest(ctx context.Context, msg interface{}) (io.ReadClos
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return resp.Body, errors.New(resp.Status)
+	}
 	return resp.Body, nil
 }
 
@@ -149,11 +194,31 @@ func (t *httpReadWriteNopCloser) Close() error {
 // NewHTTPServer creates a new HTTP RPC server around an API provider.
 //
 // Deprecated: Server implements http.Handler
-func NewHTTPServer(cors []string, vhosts []string, srv *Server) *http.Server {
+func NewHTTPServer(cors []string, vhosts []string, timeouts HTTPTimeouts, srv *Server) *http.Server {
 	// Wrap the CORS-handler within a host-handler
 	handler := newCorsHandler(srv, cors)
 	handler = newVHostHandler(vhosts, handler)
-	return &http.Server{Handler: handler}
+
+	// Make sure timeout values are meaningful
+	if timeouts.ReadTimeout < time.Second {
+		log.Warn("Sanitizing invalid HTTP read timeout", "provided", timeouts.ReadTimeout, "updated", DefaultHTTPTimeouts.ReadTimeout)
+		timeouts.ReadTimeout = DefaultHTTPTimeouts.ReadTimeout
+	}
+	if timeouts.WriteTimeout < time.Second {
+		log.Warn("Sanitizing invalid HTTP write timeout", "provided", timeouts.WriteTimeout, "updated", DefaultHTTPTimeouts.WriteTimeout)
+		timeouts.WriteTimeout = DefaultHTTPTimeouts.WriteTimeout
+	}
+	if timeouts.IdleTimeout < time.Second {
+		log.Warn("Sanitizing invalid HTTP idle timeout", "provided", timeouts.IdleTimeout, "updated", DefaultHTTPTimeouts.IdleTimeout)
+		timeouts.IdleTimeout = DefaultHTTPTimeouts.IdleTimeout
+	}
+	// Bundle and start the HTTP server
+	return &http.Server{
+		Handler:      handler,
+		ReadTimeout:  timeouts.ReadTimeout,
+		WriteTimeout: timeouts.WriteTimeout,
+		IdleTimeout:  timeouts.IdleTimeout,
+	}
 }
 
 // ServeHTTP serves JSON-RPC requests over HTTP.
@@ -169,11 +234,17 @@ func (srv *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// All checks passed, create a codec that reads direct from the request body
 	// untilEOF and writes the response to w and order the server to process a
 	// single request.
-	codec := NewJSONCodec(&httpReadWriteNopCloser{r.Body, w})
+	ctx := r.Context()
+	ctx = context.WithValue(ctx, "remote", r.RemoteAddr)
+	ctx = context.WithValue(ctx, "scheme", r.Proto)
+	ctx = context.WithValue(ctx, "local", r.Host)
+
+	body := io.LimitReader(r.Body, maxRequestContentLength)
+	codec := NewJSONCodec(&httpReadWriteNopCloser{body, w})
 	defer codec.Close()
 
 	w.Header().Set("content-type", contentType)
-	srv.ServeSingleRequest(codec, OptionMethodInvocation)
+	srv.ServeSingleRequest(ctx, codec, OptionMethodInvocation)
 }
 
 // validateRequest returns a non-zero response code and error message if the
@@ -182,8 +253,8 @@ func validateRequest(r *http.Request) (int, error) {
 	if r.Method == http.MethodPut || r.Method == http.MethodDelete {
 		return http.StatusMethodNotAllowed, errors.New("method not allowed")
 	}
-	if r.ContentLength > maxHTTPRequestContentLength {
-		err := fmt.Errorf("content length too large (%d>%d)", r.ContentLength, maxHTTPRequestContentLength)
+	if r.ContentLength > maxRequestContentLength {
+		err := fmt.Errorf("content length too large (%d>%d)", r.ContentLength, maxRequestContentLength)
 		return http.StatusRequestEntityTooLarge, err
 	}
 	mt, _, err := mime.ParseMediaType(r.Header.Get("content-type"))

vendor/github.com/ethereum/go-ethereum/rpc/http_test.go

@@ -32,7 +32,7 @@ func TestHTTPErrorResponseWithPut(t *testing.T) {
 }
 
 func TestHTTPErrorResponseWithMaxContentLength(t *testing.T) {
-	body := make([]rune, maxHTTPRequestContentLength+1)
+	body := make([]rune, maxRequestContentLength+1)
 	testHTTPErrorResponse(t,
 		http.MethodPost, contentType, string(body), http.StatusRequestEntityTooLarge)
 }

vendor/github.com/ethereum/go-ethereum/rpc/inproc.go

@@ -21,7 +21,7 @@ import (
 	"net"
 )
 
-// NewInProcClient attaches an in-process connection to the given RPC server.
+// DialInProc attaches an in-process connection to the given RPC server.
 func DialInProc(handler *Server) *Client {
 	initctx := context.Background()
 	c, _ := newClient(initctx, func(context.Context) (net.Conn, error) {

vendor/github.com/ethereum/go-ethereum/rpc/ipc.go

@@ -18,26 +18,23 @@ package rpc
 
 import (
 	"context"
-	"fmt"
 	"net"
 
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/p2p/netutil"
 )
 
-// CreateIPCListener creates an listener, on Unix platforms this is a unix socket, on
-// Windows this is a named pipe
-func CreateIPCListener(endpoint string) (net.Listener, error) {
-	return ipcListen(endpoint)
-}
-
 // ServeListener accepts connections on l, serving JSON-RPC on them.
 func (srv *Server) ServeListener(l net.Listener) error {
 	for {
 		conn, err := l.Accept()
-		if err != nil {
+		if netutil.IsTemporaryError(err) {
+			log.Warn("RPC accept error", "err", err)
+			continue
+		} else if err != nil {
 			return err
 		}
-		log.Trace(fmt.Sprint("accepted conn", conn.RemoteAddr()))
+		log.Trace("Accepted connection", "addr", conn.RemoteAddr())
 		go srv.ServeCodec(NewJSONCodec(conn), OptionMethodInvocation|OptionSubscriptions)
 	}
 }

vendor/github.com/ethereum/go-ethereum/rpc/json.go

@@ -76,13 +76,13 @@ type jsonNotification struct {
 // jsonCodec reads and writes JSON-RPC messages to the underlying connection. It
 // also has support for parsing arguments and serializing (result) objects.
 type jsonCodec struct {
-	closer sync.Once          // close closed channel once
-	closed chan interface{}   // closed on Close
-	decMu  sync.Mutex         // guards d
-	d      *json.Decoder      // decodes incoming requests
-	encMu  sync.Mutex         // guards e
-	e      *json.Encoder      // encodes responses
-	rw     io.ReadWriteCloser // connection
+	closer sync.Once                 // close closed channel once
+	closed chan interface{}          // closed on Close
+	decMu  sync.Mutex                // guards the decoder
+	decode func(v interface{}) error // decoder to allow multiple transports
+	encMu  sync.Mutex                // guards the encoder
+	encode func(v interface{}) error // encoder to allow multiple transports
+	rw     io.ReadWriteCloser        // connection
 }
 
 func (err *jsonError) Error() string {
@@ -96,11 +96,29 @@ func (err *jsonError) ErrorCode() int {
 	return err.Code
 }
 
-// NewJSONCodec creates a new RPC server codec with support for JSON-RPC 2.0
+// NewCodec creates a new RPC server codec with support for JSON-RPC 2.0 based
+// on explicitly given encoding and decoding methods.
+func NewCodec(rwc io.ReadWriteCloser, encode, decode func(v interface{}) error) ServerCodec {
+	return &jsonCodec{
+		closed: make(chan interface{}),
+		encode: encode,
+		decode: decode,
+		rw:     rwc,
+	}
+}
+
+// NewJSONCodec creates a new RPC server codec with support for JSON-RPC 2.0.
 func NewJSONCodec(rwc io.ReadWriteCloser) ServerCodec {
-	d := json.NewDecoder(rwc)
-	d.UseNumber()
-	return &jsonCodec{closed: make(chan interface{}), d: d, e: json.NewEncoder(rwc), rw: rwc}
+	enc := json.NewEncoder(rwc)
+	dec := json.NewDecoder(rwc)
+	dec.UseNumber()
+
+	return &jsonCodec{
+		closed: make(chan interface{}),
+		encode: enc.Encode,
+		decode: dec.Decode,
+		rw:     rwc,
+	}
 }
 
 // isBatch returns true when the first non-whitespace characters is '['
@@ -123,14 +141,12 @@ func (c *jsonCodec) ReadRequestHeaders() ([]rpcRequest, bool, Error) {
 	defer c.decMu.Unlock()
 
 	var incomingMsg json.RawMessage
-	if err := c.d.Decode(&incomingMsg); err != nil {
+	if err := c.decode(&incomingMsg); err != nil {
 		return nil, false, &invalidRequestError{err.Error()}
 	}
-
 	if isBatch(incomingMsg) {
 		return parseBatchRequest(incomingMsg)
 	}
-
 	return parseRequest(incomingMsg)
 }
 
@@ -304,9 +320,6 @@ func parsePositionalArguments(rawArgs json.RawMessage, types []reflect.Type) ([]
 
 // CreateResponse will create a JSON-RPC success response with the given id and reply as result.
 func (c *jsonCodec) CreateResponse(id interface{}, reply interface{}) interface{} {
-	if isHexNum(reflect.TypeOf(reply)) {
-		return &jsonSuccessResponse{Version: jsonrpcVersion, Id: id, Result: fmt.Sprintf(`%#x`, reply)}
-	}
 	return &jsonSuccessResponse{Version: jsonrpcVersion, Id: id, Result: reply}
 }
 
@@ -324,11 +337,6 @@ func (c *jsonCodec) CreateErrorResponseWithInfo(id interface{}, err Error, info
 
 // CreateNotification will create a JSON-RPC notification with the given subscription id and event as params.
 func (c *jsonCodec) CreateNotification(subid, namespace string, event interface{}) interface{} {
-	if isHexNum(reflect.TypeOf(event)) {
-		return &jsonNotification{Version: jsonrpcVersion, Method: namespace + notificationMethodSuffix,
-			Params: jsonSubscription{Subscription: subid, Result: fmt.Sprintf(`%#x`, event)}}
-	}
-
 	return &jsonNotification{Version: jsonrpcVersion, Method: namespace + notificationMethodSuffix,
 		Params: jsonSubscription{Subscription: subid, Result: event}}
 }
@@ -338,7 +346,7 @@ func (c *jsonCodec) Write(res interface{}) error {
 	c.encMu.Lock()
 	defer c.encMu.Unlock()
 
-	return c.e.Encode(res)
+	return c.encode(res)
 }
 
 // Close the underlying connection

vendor/github.com/ethereum/go-ethereum/rpc/server.go

@@ -25,8 +25,8 @@ import (
 	"sync"
 	"sync/atomic"
 
+	mapset "github.com/deckarep/golang-set"
 	"github.com/ethereum/go-ethereum/log"
-	"gopkg.in/fatih/set.v0"
 )
 
 const MetadataApi = "rpc"
@@ -46,7 +46,7 @@ const (
 func NewServer() *Server {
 	server := &Server{
 		services: make(serviceRegistry),
-		codecs:   set.New(),
+		codecs:   mapset.NewSet(),
 		run:      1,
 	}
 
@@ -94,11 +94,12 @@ func (s *Server) RegisterName(name string, rcvr interface{}) error {
 
 	methods, subscriptions := suitableCallbacks(rcvrVal, svc.typ)
 
-	// already a previous service register under given sname, merge methods/subscriptions
+	if len(methods) == 0 && len(subscriptions) == 0 {
+		return fmt.Errorf("Service %T doesn't have any suitable methods/subscriptions to expose", rcvr)
+	}
+
+	// already a previous service register under given name, merge methods/subscriptions
 	if regsvc, present := s.services[name]; present {
-		if len(methods) == 0 && len(subscriptions) == 0 {
-			return fmt.Errorf("Service %T doesn't have any suitable methods/subscriptions to expose", rcvr)
-		}
 		for _, m := range methods {
 			regsvc.callbacks[formatName(m.method.Name)] = m
 		}
@@ -111,10 +112,6 @@ func (s *Server) RegisterName(name string, rcvr interface{}) error {
 	svc.name = name
 	svc.callbacks, svc.subscriptions = methods, subscriptions
 
-	if len(svc.callbacks) == 0 && len(svc.subscriptions) == 0 {
-		return fmt.Errorf("Service %T doesn't have any suitable methods/subscriptions to expose", rcvr)
-	}
-
 	s.services[svc.name] = svc
 	return nil
 }
@@ -125,7 +122,7 @@ func (s *Server) RegisterName(name string, rcvr interface{}) error {
 // If singleShot is true it will process a single request, otherwise it will handle
 // requests until the codec returns an error when reading a request (in most cases
 // an EOF). It executes requests in parallel when singleShot is false.
-func (s *Server) serveRequest(codec ServerCodec, singleShot bool, options CodecOption) error {
+func (s *Server) serveRequest(ctx context.Context, codec ServerCodec, singleShot bool, options CodecOption) error {
 	var pend sync.WaitGroup
 
 	defer func() {
@@ -140,11 +137,12 @@ func (s *Server) serveRequest(codec ServerCodec, singleShot bool, options CodecO
 		s.codecsMu.Unlock()
 	}()
 
-	ctx, cancel := context.WithCancel(context.Background())
+	//	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
 	// if the codec supports notification include a notifier that callbacks can use
-	// to send notification to clients. It is thight to the codec/connection. If the
+	// to send notification to clients. It is tied to the codec/connection. If the
 	// connection is closed the notifier will stop and cancels all active subscriptions.
 	if options&OptionSubscriptions == OptionSubscriptions {
 		ctx = context.WithValue(ctx, notifierKey{}, newNotifier(codec))
@@ -215,14 +213,14 @@ func (s *Server) serveRequest(codec ServerCodec, singleShot bool, options CodecO
 // stopped. In either case the codec is closed.
 func (s *Server) ServeCodec(codec ServerCodec, options CodecOption) {
 	defer codec.Close()
-	s.serveRequest(codec, false, options)
+	s.serveRequest(context.Background(), codec, false, options)
 }
 
 // ServeSingleRequest reads and processes a single RPC request from the given codec. It will not
 // close the codec unless a non-recoverable error has occurred. Note, this method will return after
 // a single request has been processed!
-func (s *Server) ServeSingleRequest(codec ServerCodec, options CodecOption) {
-	s.serveRequest(codec, true, options)
+func (s *Server) ServeSingleRequest(ctx context.Context, codec ServerCodec, options CodecOption) {
+	s.serveRequest(ctx, codec, true, options)
 }
 
 // Stop will stop reading new requests, wait for stopPendingRequestTimeout to allow pending requests to finish,
@@ -312,7 +310,6 @@ func (s *Server) handle(ctx context.Context, codec ServerCodec, req *serverReque
 	if len(reply) == 0 {
 		return codec.CreateResponse(req.id, nil), nil
 	}
-
 	if req.callb.errPos >= 0 { // test if method returned an error
 		if !reply[req.callb.errPos].IsNil() {
 			e := reply[req.callb.errPos].Interface().(error)

vendor/github.com/ethereum/go-ethereum/rpc/types.go

@@ -23,8 +23,8 @@ import (
 	"strings"
 	"sync"
 
+	mapset "github.com/deckarep/golang-set"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"gopkg.in/fatih/set.v0"
 )
 
 // API describes the set of methods offered over the RPC interface
@@ -73,7 +73,7 @@ type Server struct {
 
 	run      int32
 	codecsMu sync.Mutex
-	codecs   *set.Set
+	codecs   mapset.Set
 }
 
 // rpcRequest represents a raw incoming RPC request

vendor/github.com/ethereum/go-ethereum/rpc/utils.go

@@ -22,7 +22,6 @@ import (
 	crand "crypto/rand"
 	"encoding/binary"
 	"encoding/hex"
-	"math/big"
 	"math/rand"
 	"reflect"
 	"strings"
@@ -105,20 +104,6 @@ func formatName(name string) string {
 	return string(ret)
 }
 
-var bigIntType = reflect.TypeOf((*big.Int)(nil)).Elem()
-
-// Indication if this type should be serialized in hex
-func isHexNum(t reflect.Type) bool {
-	if t == nil {
-		return false
-	}
-	for t.Kind() == reflect.Ptr {
-		t = t.Elem()
-	}
-
-	return t == bigIntType
-}
-
 // suitableCallbacks iterates over the methods of the given type. It will determine if a method satisfies the criteria
 // for a RPC callback or a subscription callback and adds it to the collection of callbacks or subscriptions. See server
 // documentation for a summary of these criteria.

vendor/github.com/ethereum/go-ethereum/rpc/websocket.go

@@ -17,8 +17,10 @@
 package rpc
 
 import (
+	"bytes"
 	"context"
 	"crypto/tls"
+	"encoding/json"
 	"fmt"
 	"net"
 	"net/http"
@@ -27,11 +29,28 @@ import (
 	"strings"
 	"time"
 
+	mapset "github.com/deckarep/golang-set"
 	"github.com/ethereum/go-ethereum/log"
 	"golang.org/x/net/websocket"
-	"gopkg.in/fatih/set.v0"
 )
 
+// websocketJSONCodec is a custom JSON codec with payload size enforcement and
+// special number parsing.
+var websocketJSONCodec = websocket.Codec{
+	// Marshal is the stock JSON marshaller used by the websocket library too.
+	Marshal: func(v interface{}) ([]byte, byte, error) {
+		msg, err := json.Marshal(v)
+		return msg, websocket.TextFrame, err
+	},
+	// Unmarshal is a specialized unmarshaller to properly convert numbers.
+	Unmarshal: func(msg []byte, payloadType byte, v interface{}) error {
+		dec := json.NewDecoder(bytes.NewReader(msg))
+		dec.UseNumber()
+
+		return dec.Decode(v)
+	},
+}
+
 // WebsocketHandler returns a handler that serves JSON-RPC to WebSocket connections.
 //
 // allowedOrigins should be a comma-separated list of allowed origin URLs.
@@ -40,7 +59,16 @@ func (srv *Server) WebsocketHandler(allowedOrigins []string) http.Handler {
 	return websocket.Server{
 		Handshake: wsHandshakeValidator(allowedOrigins),
 		Handler: func(conn *websocket.Conn) {
-			srv.ServeCodec(NewJSONCodec(conn), OptionMethodInvocation|OptionSubscriptions)
+			// Create a custom encode/decode pair to enforce payload size and number encoding
+			conn.MaxPayloadBytes = maxRequestContentLength
+
+			encoder := func(v interface{}) error {
+				return websocketJSONCodec.Send(conn, v)
+			}
+			decoder := func(v interface{}) error {
+				return websocketJSONCodec.Receive(conn, v)
+			}
+			srv.ServeCodec(NewCodec(conn, encoder, decoder), OptionMethodInvocation|OptionSubscriptions)
 		},
 	}
 }
@@ -56,7 +84,7 @@ func NewWSServer(allowedOrigins []string, srv *Server) *http.Server {
 // websocket upgrade process. When a '*' is specified as an allowed origins all
 // connections are accepted.
 func wsHandshakeValidator(allowedOrigins []string) func(*websocket.Config, *http.Request) error {
-	origins := set.New()
+	origins := mapset.NewSet()
 	allowAllOrigins := false
 
 	for _, origin := range allowedOrigins {
@@ -69,18 +97,18 @@ func wsHandshakeValidator(allowedOrigins []string) func(*websocket.Config, *http
 	}
 
 	// allow localhost if no allowedOrigins are specified.
-	if len(origins.List()) == 0 {
+	if len(origins.ToSlice()) == 0 {
 		origins.Add("http://localhost")
 		if hostname, err := os.Hostname(); err == nil {
 			origins.Add("http://" + strings.ToLower(hostname))
 		}
 	}
 
-	log.Debug(fmt.Sprintf("Allowed origin(s) for WS RPC interface %v\n", origins.List()))
+	log.Debug(fmt.Sprintf("Allowed origin(s) for WS RPC interface %v\n", origins.ToSlice()))
 
 	f := func(cfg *websocket.Config, req *http.Request) error {
 		origin := strings.ToLower(req.Header.Get("Origin"))
-		if allowAllOrigins || origins.Has(origin) {
+		if allowAllOrigins || origins.Contains(origin) {
 			return nil
 		}
 		log.Warn(fmt.Sprintf("origin '%s' not allowed on WS-RPC interface\n", origin))