forked from TrueCloudLab/neoneo-go
670 lines
17 KiB
Go
670 lines
17 KiB
Go
package server
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import (
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"context"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"net/http"
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"strconv"
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"github.com/CityOfZion/neo-go/config"
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"github.com/CityOfZion/neo-go/pkg/core"
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"github.com/CityOfZion/neo-go/pkg/core/state"
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"github.com/CityOfZion/neo-go/pkg/core/transaction"
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"github.com/CityOfZion/neo-go/pkg/encoding/address"
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"github.com/CityOfZion/neo-go/pkg/io"
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"github.com/CityOfZion/neo-go/pkg/network"
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"github.com/CityOfZion/neo-go/pkg/rpc/request"
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"github.com/CityOfZion/neo-go/pkg/rpc/response"
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"github.com/CityOfZion/neo-go/pkg/rpc/response/result"
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"github.com/CityOfZion/neo-go/pkg/util"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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)
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type (
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// Server represents the JSON-RPC 2.0 server.
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Server struct {
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*http.Server
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chain core.Blockchainer
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config config.RPCConfig
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coreServer *network.Server
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log *zap.Logger
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}
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)
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var invalidBlockHeightError = func(index int, height int) error {
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return errors.Errorf("Param at index %d should be greater than or equal to 0 and less then or equal to current block height, got: %d", index, height)
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}
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// New creates a new Server struct.
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func New(chain core.Blockchainer, conf config.RPCConfig, coreServer *network.Server, log *zap.Logger) Server {
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httpServer := &http.Server{
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Addr: conf.Address + ":" + strconv.FormatUint(uint64(conf.Port), 10),
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}
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return Server{
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Server: httpServer,
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chain: chain,
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config: conf,
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coreServer: coreServer,
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log: log,
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}
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}
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// Start creates a new JSON-RPC server
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// listening on the configured port.
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func (s *Server) Start(errChan chan error) {
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if !s.config.Enabled {
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s.log.Info("RPC server is not enabled")
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return
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}
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s.Handler = http.HandlerFunc(s.requestHandler)
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s.log.Info("starting rpc-server", zap.String("endpoint", s.Addr))
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errChan <- s.ListenAndServe()
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}
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// Shutdown overrides the http.Server Shutdown
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// method.
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func (s *Server) Shutdown() error {
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s.log.Info("shutting down rpc-server", zap.String("endpoint", s.Addr))
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return s.Server.Shutdown(context.Background())
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}
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func (s *Server) requestHandler(w http.ResponseWriter, httpRequest *http.Request) {
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req := request.NewIn()
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if httpRequest.Method != "POST" {
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s.WriteErrorResponse(
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req,
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w,
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response.NewInvalidParamsError(
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fmt.Sprintf("Invalid method '%s', please retry with 'POST'", httpRequest.Method), nil,
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),
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)
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return
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}
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err := req.DecodeData(httpRequest.Body)
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if err != nil {
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s.WriteErrorResponse(req, w, response.NewParseError("Problem parsing JSON-RPC request body", err))
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return
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}
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reqParams, err := req.Params()
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if err != nil {
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s.WriteErrorResponse(req, w, response.NewInvalidParamsError("Problem parsing request parameters", err))
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return
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}
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s.methodHandler(w, req, *reqParams)
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}
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func (s *Server) methodHandler(w http.ResponseWriter, req *request.In, reqParams request.Params) {
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s.log.Debug("processing rpc request",
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zap.String("method", req.Method),
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zap.String("params", fmt.Sprintf("%v", reqParams)))
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var (
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results interface{}
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resultsErr error
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)
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Methods:
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switch req.Method {
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case "getbestblockhash":
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getbestblockhashCalled.Inc()
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results = "0x" + s.chain.CurrentBlockHash().StringLE()
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case "getblock":
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getbestblockCalled.Inc()
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var hash util.Uint256
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param, ok := reqParams.Value(0)
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if !ok {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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switch param.Type {
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case request.StringT:
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var err error
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hash, err = param.GetUint256()
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if err != nil {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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case request.NumberT:
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num, err := s.blockHeightFromParam(param)
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if err != nil {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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hash = s.chain.GetHeaderHash(num)
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default:
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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block, err := s.chain.GetBlock(hash)
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if err != nil {
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resultsErr = response.NewInternalServerError(fmt.Sprintf("Problem locating block with hash: %s", hash), err)
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break
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}
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if len(reqParams) == 2 && reqParams[1].Value == 1 {
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results = result.NewBlock(block, s.chain)
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} else {
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writer := io.NewBufBinWriter()
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block.EncodeBinary(writer.BinWriter)
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results = hex.EncodeToString(writer.Bytes())
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}
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case "getblockcount":
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getblockcountCalled.Inc()
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results = s.chain.BlockHeight() + 1
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case "getblockhash":
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getblockHashCalled.Inc()
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param, ok := reqParams.ValueWithType(0, request.NumberT)
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if !ok {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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num, err := s.blockHeightFromParam(param)
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if err != nil {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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results = s.chain.GetHeaderHash(num)
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case "getblocksysfee":
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getblocksysfeeCalled.Inc()
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results, resultsErr = s.getBlockSysFee(reqParams)
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case "getconnectioncount":
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getconnectioncountCalled.Inc()
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results = s.coreServer.PeerCount()
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case "getversion":
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getversionCalled.Inc()
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results = result.Version{
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Port: s.coreServer.Port,
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Nonce: s.coreServer.ID(),
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UserAgent: s.coreServer.UserAgent,
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}
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case "getpeers":
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getpeersCalled.Inc()
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peers := result.NewGetPeers()
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peers.AddUnconnected(s.coreServer.UnconnectedPeers())
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peers.AddConnected(s.coreServer.ConnectedPeers())
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peers.AddBad(s.coreServer.BadPeers())
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results = peers
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case "getstorage":
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getstorageCalled.Inc()
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results, resultsErr = s.getStorage(reqParams)
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case "validateaddress":
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validateaddressCalled.Inc()
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param, ok := reqParams.Value(0)
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if !ok {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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results = validateAddress(param.Value)
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case "getassetstate":
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getassetstateCalled.Inc()
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param, ok := reqParams.ValueWithType(0, request.StringT)
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if !ok {
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resultsErr = response.ErrInvalidParams
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break Methods
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}
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paramAssetID, err := param.GetUint256()
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if err != nil {
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resultsErr = response.ErrInvalidParams
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break
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}
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as := s.chain.GetAssetState(paramAssetID)
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if as != nil {
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results = result.NewAssetState(as)
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} else {
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resultsErr = response.NewRPCError("Unknown asset", "", nil)
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}
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case "getaccountstate":
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getaccountstateCalled.Inc()
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results, resultsErr = s.getAccountState(reqParams, false)
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case "getcontractstate":
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getcontractstateCalled.Inc()
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results, resultsErr = s.getContractState(reqParams)
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case "getrawtransaction":
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getrawtransactionCalled.Inc()
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results, resultsErr = s.getrawtransaction(reqParams)
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case "gettxout":
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gettxoutCalled.Inc()
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results, resultsErr = s.getTxOut(reqParams)
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case "getunspents":
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getunspentsCalled.Inc()
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results, resultsErr = s.getAccountState(reqParams, true)
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case "invoke":
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results, resultsErr = s.invoke(reqParams)
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case "invokefunction":
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results, resultsErr = s.invokeFunction(reqParams)
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case "invokescript":
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results, resultsErr = s.invokescript(reqParams)
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case "sendrawtransaction":
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sendrawtransactionCalled.Inc()
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results, resultsErr = s.sendrawtransaction(reqParams)
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default:
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resultsErr = response.NewMethodNotFoundError(fmt.Sprintf("Method '%s' not supported", req.Method), nil)
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}
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if resultsErr != nil {
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s.WriteErrorResponse(req, w, resultsErr)
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return
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}
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s.WriteResponse(req, w, results)
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}
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func (s *Server) getStorage(ps request.Params) (interface{}, error) {
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param, ok := ps.Value(0)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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scriptHash, err := param.GetUint160FromHex()
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if err != nil {
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return nil, response.ErrInvalidParams
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}
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scriptHash = scriptHash.Reverse()
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param, ok = ps.Value(1)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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key, err := param.GetBytesHex()
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if err != nil {
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return nil, response.ErrInvalidParams
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}
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item := s.chain.GetStorageItem(scriptHash.Reverse(), key)
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if item == nil {
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return nil, nil
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}
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return hex.EncodeToString(item.Value), nil
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}
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func (s *Server) getrawtransaction(reqParams request.Params) (interface{}, error) {
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var resultsErr error
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var results interface{}
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if param0, ok := reqParams.Value(0); !ok {
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return nil, response.ErrInvalidParams
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} else if txHash, err := param0.GetUint256(); err != nil {
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resultsErr = response.ErrInvalidParams
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} else if tx, height, err := s.chain.GetTransaction(txHash); err != nil {
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err = errors.Wrapf(err, "Invalid transaction hash: %s", txHash)
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return nil, response.NewRPCError("Unknown transaction", err.Error(), err)
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} else if len(reqParams) >= 2 {
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_header := s.chain.GetHeaderHash(int(height))
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header, err := s.chain.GetHeader(_header)
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if err != nil {
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resultsErr = response.NewInvalidParamsError(err.Error(), err)
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}
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param1, _ := reqParams.Value(1)
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switch v := param1.Value.(type) {
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case int, float64, bool, string:
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if v == 0 || v == "0" || v == 0.0 || v == false || v == "false" {
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results = hex.EncodeToString(tx.Bytes())
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} else {
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results = result.NewTransactionOutputRaw(tx, header, s.chain)
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}
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default:
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results = result.NewTransactionOutputRaw(tx, header, s.chain)
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}
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} else {
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results = hex.EncodeToString(tx.Bytes())
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}
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return results, resultsErr
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}
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func (s *Server) getTxOut(ps request.Params) (interface{}, error) {
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p, ok := ps.Value(0)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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h, err := p.GetUint256()
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if err != nil {
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return nil, response.ErrInvalidParams
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}
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p, ok = ps.ValueWithType(1, request.NumberT)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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num, err := p.GetInt()
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if err != nil || num < 0 {
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return nil, response.ErrInvalidParams
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}
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tx, _, err := s.chain.GetTransaction(h)
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if err != nil {
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return nil, response.NewInvalidParamsError(err.Error(), err)
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}
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if num >= len(tx.Outputs) {
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return nil, response.NewInvalidParamsError("invalid index", errors.New("too big index"))
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}
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out := tx.Outputs[num]
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return result.NewTxOutput(&out), nil
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}
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// getContractState returns contract state (contract information, according to the contract script hash).
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func (s *Server) getContractState(reqParams request.Params) (interface{}, error) {
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var results interface{}
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param, ok := reqParams.ValueWithType(0, request.StringT)
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if !ok {
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return nil, response.ErrInvalidParams
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} else if scriptHash, err := param.GetUint160FromHex(); err != nil {
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return nil, response.ErrInvalidParams
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} else {
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cs := s.chain.GetContractState(scriptHash)
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if cs != nil {
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results = result.NewContractState(cs)
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} else {
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return nil, response.NewRPCError("Unknown contract", "", nil)
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}
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}
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return results, nil
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}
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// getAccountState returns account state either in short or full (unspents included) form.
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func (s *Server) getAccountState(reqParams request.Params, unspents bool) (interface{}, error) {
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var resultsErr error
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var results interface{}
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param, ok := reqParams.ValueWithType(0, request.StringT)
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if !ok {
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return nil, response.ErrInvalidParams
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} else if scriptHash, err := param.GetUint160FromAddress(); err != nil {
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return nil, response.ErrInvalidParams
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} else {
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as := s.chain.GetAccountState(scriptHash)
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if as == nil {
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as = state.NewAccount(scriptHash)
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}
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if unspents {
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str, err := param.GetString()
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if err != nil {
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return nil, response.ErrInvalidParams
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}
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results = result.NewUnspents(as, s.chain, str)
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} else {
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results = result.NewAccountState(as)
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}
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}
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return results, resultsErr
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}
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// getBlockSysFee returns the system fees of the block, based on the specified index.
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func (s *Server) getBlockSysFee(reqParams request.Params) (util.Fixed8, error) {
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param, ok := reqParams.ValueWithType(0, request.NumberT)
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if !ok {
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return 0, response.ErrInvalidParams
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}
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num, err := s.blockHeightFromParam(param)
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if err != nil {
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return 0, response.NewRPCError("Invalid height", "", nil)
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}
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headerHash := s.chain.GetHeaderHash(num)
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block, err := s.chain.GetBlock(headerHash)
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if err != nil {
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return 0, response.NewRPCError(err.Error(), "", nil)
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}
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var blockSysFee util.Fixed8
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for _, tx := range block.Transactions {
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blockSysFee += s.chain.SystemFee(tx)
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}
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return blockSysFee, nil
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}
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// invoke implements the `invoke` RPC call.
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func (s *Server) invoke(reqParams request.Params) (interface{}, error) {
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scriptHashHex, ok := reqParams.ValueWithType(0, request.StringT)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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scriptHash, err := scriptHashHex.GetUint160FromHex()
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if err != nil {
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return nil, err
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}
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sliceP, ok := reqParams.ValueWithType(1, request.ArrayT)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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slice, err := sliceP.GetArray()
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if err != nil {
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return nil, err
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}
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script, err := request.CreateInvocationScript(scriptHash, slice)
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if err != nil {
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return nil, err
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}
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return s.runScriptInVM(script), nil
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}
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// invokescript implements the `invokescript` RPC call.
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func (s *Server) invokeFunction(reqParams request.Params) (interface{}, error) {
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scriptHashHex, ok := reqParams.ValueWithType(0, request.StringT)
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if !ok {
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return nil, response.ErrInvalidParams
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}
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scriptHash, err := scriptHashHex.GetUint160FromHex()
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if err != nil {
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return nil, err
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}
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script, err := request.CreateFunctionInvocationScript(scriptHash, reqParams[1:])
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if err != nil {
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return nil, err
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}
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return s.runScriptInVM(script), nil
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}
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// invokescript implements the `invokescript` RPC call.
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func (s *Server) invokescript(reqParams request.Params) (interface{}, error) {
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if len(reqParams) < 1 {
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return nil, response.ErrInvalidParams
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}
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script, err := reqParams[0].GetBytesHex()
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if err != nil {
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return nil, response.ErrInvalidParams
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}
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return s.runScriptInVM(script), nil
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}
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// runScriptInVM runs given script in a new test VM and returns the invocation
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// result.
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func (s *Server) runScriptInVM(script []byte) *result.Invoke {
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vm, _ := s.chain.GetTestVM()
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vm.SetGasLimit(s.config.MaxGasInvoke)
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vm.LoadScript(script)
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_ = vm.Run()
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result := &result.Invoke{
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State: vm.State(),
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GasConsumed: vm.GasConsumed().String(),
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Script: hex.EncodeToString(script),
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Stack: vm.Estack(),
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}
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return result
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}
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func (s *Server) sendrawtransaction(reqParams request.Params) (interface{}, error) {
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var resultsErr error
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var results interface{}
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if len(reqParams) < 1 {
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return nil, response.ErrInvalidParams
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} else if byteTx, err := reqParams[0].GetBytesHex(); err != nil {
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return nil, response.ErrInvalidParams
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} else {
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r := io.NewBinReaderFromBuf(byteTx)
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tx := &transaction.Transaction{}
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tx.DecodeBinary(r)
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if r.Err != nil {
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err = errors.Wrap(r.Err, "transaction DecodeBinary failed")
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} else {
|
|
relayReason := s.coreServer.RelayTxn(tx)
|
|
switch relayReason {
|
|
case network.RelaySucceed:
|
|
results = true
|
|
case network.RelayAlreadyExists:
|
|
err = errors.New("block or transaction already exists and cannot be sent repeatedly")
|
|
case network.RelayOutOfMemory:
|
|
err = errors.New("the memory pool is full and no more transactions can be sent")
|
|
case network.RelayUnableToVerify:
|
|
err = errors.New("the block cannot be validated")
|
|
case network.RelayInvalid:
|
|
err = errors.New("block or transaction validation failed")
|
|
case network.RelayPolicyFail:
|
|
err = errors.New("one of the Policy filters failed")
|
|
default:
|
|
err = errors.New("unknown error")
|
|
}
|
|
}
|
|
if err != nil {
|
|
resultsErr = response.NewInternalServerError(err.Error(), err)
|
|
}
|
|
}
|
|
|
|
return results, resultsErr
|
|
}
|
|
|
|
func (s *Server) blockHeightFromParam(param *request.Param) (int, error) {
|
|
num, err := param.GetInt()
|
|
if err != nil {
|
|
return 0, nil
|
|
}
|
|
|
|
if num < 0 || num > int(s.chain.BlockHeight()) {
|
|
return 0, invalidBlockHeightError(0, num)
|
|
}
|
|
return num, nil
|
|
}
|
|
|
|
// WriteErrorResponse writes an error response to the ResponseWriter.
|
|
func (s *Server) WriteErrorResponse(r *request.In, w http.ResponseWriter, err error) {
|
|
jsonErr, ok := err.(*response.Error)
|
|
if !ok {
|
|
jsonErr = response.NewInternalServerError("Internal server error", err)
|
|
}
|
|
|
|
resp := response.Raw{
|
|
HeaderAndError: response.HeaderAndError{
|
|
Header: response.Header{
|
|
JSONRPC: r.JSONRPC,
|
|
ID: r.RawID,
|
|
},
|
|
Error: jsonErr,
|
|
},
|
|
}
|
|
|
|
logFields := []zap.Field{
|
|
zap.Error(jsonErr.Cause),
|
|
zap.String("method", r.Method),
|
|
}
|
|
|
|
params, err := r.Params()
|
|
if err == nil {
|
|
logFields = append(logFields, zap.Any("params", params))
|
|
}
|
|
|
|
s.log.Error("Error encountered with rpc request", logFields...)
|
|
|
|
w.WriteHeader(jsonErr.HTTPCode)
|
|
s.writeServerResponse(r, w, resp)
|
|
}
|
|
|
|
// WriteResponse encodes the response and writes it to the ResponseWriter.
|
|
func (s *Server) WriteResponse(r *request.In, w http.ResponseWriter, result interface{}) {
|
|
resJSON, err := json.Marshal(result)
|
|
if err != nil {
|
|
s.log.Error("Error encountered while encoding response",
|
|
zap.String("err", err.Error()),
|
|
zap.String("method", r.Method))
|
|
return
|
|
}
|
|
|
|
resp := response.Raw{
|
|
HeaderAndError: response.HeaderAndError{
|
|
Header: response.Header{
|
|
JSONRPC: r.JSONRPC,
|
|
ID: r.RawID,
|
|
},
|
|
},
|
|
Result: resJSON,
|
|
}
|
|
|
|
s.writeServerResponse(r, w, resp)
|
|
}
|
|
|
|
func (s *Server) writeServerResponse(r *request.In, w http.ResponseWriter, resp response.Raw) {
|
|
w.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
if s.config.EnableCORSWorkaround {
|
|
w.Header().Set("Access-Control-Allow-Origin", "*")
|
|
w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With")
|
|
}
|
|
|
|
encoder := json.NewEncoder(w)
|
|
err := encoder.Encode(resp)
|
|
|
|
if err != nil {
|
|
s.log.Error("Error encountered while encoding response",
|
|
zap.String("err", err.Error()),
|
|
zap.String("method", r.Method))
|
|
}
|
|
}
|
|
|
|
// validateAddress verifies that the address is a correct NEO address
|
|
// see https://docs.neo.org/en-us/node/cli/2.9.4/api/validateaddress.html
|
|
func validateAddress(addr interface{}) result.ValidateAddress {
|
|
resp := result.ValidateAddress{Address: addr}
|
|
if addr, ok := addr.(string); ok {
|
|
_, err := address.StringToUint160(addr)
|
|
resp.IsValid = (err == nil)
|
|
}
|
|
return resp
|
|
}
|