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neo-go/pkg/services/rpcsrv/server.go
Roman Khimov 1b83dc2476 *: improve for loop syntax 
Mostly it's about Go 1.22+ syntax with ranging over integers, but it also
prefers ranging over slices where possible (it makes code a little better to
read).

Notice that we have a number of dangerous loops where slices are mutated
during loop execution, many of these can't be converted since we need proper
length evalutation at every iteration.

Signed-off-by: Roman Khimov <roman@nspcc.ru>
2024-08-30 21:45:18 +03:00

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package rpcsrv
import (
"bytes"
"context"
"crypto/elliptic"
"encoding/binary"
"encoding/hex"
"encoding/json"
"errors"
"fmt"
"math"
"math/big"
"net"
"net/http"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/google/uuid"
"github.com/gorilla/websocket"
"github.com/nspcc-dev/neo-go/pkg/config"
"github.com/nspcc-dev/neo-go/pkg/config/limits"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"github.com/nspcc-dev/neo-go/pkg/core"
"github.com/nspcc-dev/neo-go/pkg/core/block"
"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
"github.com/nspcc-dev/neo-go/pkg/core/mempool"
"github.com/nspcc-dev/neo-go/pkg/core/mempoolevent"
"github.com/nspcc-dev/neo-go/pkg/core/mpt"
"github.com/nspcc-dev/neo-go/pkg/core/native"
"github.com/nspcc-dev/neo-go/pkg/core/state"
"github.com/nspcc-dev/neo-go/pkg/core/storage"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/encoding/address"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/neorpc"
"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
"github.com/nspcc-dev/neo-go/pkg/neorpc/rpcevent"
"github.com/nspcc-dev/neo-go/pkg/network"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/nspcc-dev/neo-go/pkg/services/oracle/broadcaster"
"github.com/nspcc-dev/neo-go/pkg/services/rpcsrv/params"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest/standard"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"go.uber.org/zap"
)
type (
// Ledger abstracts away the Blockchain as used by the RPC server.
Ledger interface {
AddBlock(block *block.Block) error
BlockHeight() uint32
CalculateAttributesFee(tx *transaction.Transaction) int64
CalculateClaimable(h util.Uint160, endHeight uint32) (*big.Int, error)
CurrentBlockHash() util.Uint256
FeePerByte() int64
ForEachNEP11Transfer(acc util.Uint160, newestTimestamp uint64, f func(*state.NEP11Transfer) (bool, error)) error
ForEachNEP17Transfer(acc util.Uint160, newestTimestamp uint64, f func(*state.NEP17Transfer) (bool, error)) error
GetAppExecResults(util.Uint256, trigger.Type) ([]state.AppExecResult, error)
GetBaseExecFee() int64
GetBlock(hash util.Uint256) (*block.Block, error)
GetCommittee() (keys.PublicKeys, error)
GetConfig() config.Blockchain
GetContractScriptHash(id int32) (util.Uint160, error)
GetContractState(hash util.Uint160) *state.Contract
GetEnrollments() ([]state.Validator, error)
GetGoverningTokenBalance(acc util.Uint160) (*big.Int, uint32)
GetHeader(hash util.Uint256) (*block.Header, error)
GetHeaderHash(uint32) util.Uint256
GetMaxVerificationGAS() int64
GetMemPool() *mempool.Pool
GetNEP11Contracts() []util.Uint160
GetNEP17Contracts() []util.Uint160
GetNativeContractScriptHash(string) (util.Uint160, error)
GetNatives() []state.Contract
GetNextBlockValidators() ([]*keys.PublicKey, error)
GetNotaryContractScriptHash() util.Uint160
GetStateModule() core.StateRoot
GetStorageItem(id int32, key []byte) state.StorageItem
GetTestHistoricVM(t trigger.Type, tx *transaction.Transaction, nextBlockHeight uint32) (*interop.Context, error)
GetTestVM(t trigger.Type, tx *transaction.Transaction, b *block.Block) (*interop.Context, error)
GetTokenLastUpdated(acc util.Uint160) (map[int32]uint32, error)
GetTransaction(util.Uint256) (*transaction.Transaction, uint32, error)
HeaderHeight() uint32
InitVerificationContext(ic *interop.Context, hash util.Uint160, witness *transaction.Witness) error
P2PSigExtensionsEnabled() bool
SubscribeForBlocks(ch chan *block.Block)
SubscribeForHeadersOfAddedBlocks(ch chan *block.Header)
SubscribeForExecutions(ch chan *state.AppExecResult)
SubscribeForNotifications(ch chan *state.ContainedNotificationEvent)
SubscribeForTransactions(ch chan *transaction.Transaction)
UnsubscribeFromBlocks(ch chan *block.Block)
UnsubscribeFromHeadersOfAddedBlocks(ch chan *block.Header)
UnsubscribeFromExecutions(ch chan *state.AppExecResult)
UnsubscribeFromNotifications(ch chan *state.ContainedNotificationEvent)
UnsubscribeFromTransactions(ch chan *transaction.Transaction)
VerifyTx(*transaction.Transaction) error
VerifyWitness(util.Uint160, hash.Hashable, *transaction.Witness, int64) (int64, error)
mempool.Feer // fee interface
ContractStorageSeeker
}
// ContractStorageSeeker is the interface `findstorage*` handlers need to be able to
// seek over contract storage. Prefix is trimmed in the resulting pair's key.
ContractStorageSeeker interface {
SeekStorage(id int32, prefix []byte, cont func(k, v []byte) bool)
}
// OracleHandler is the interface oracle service needs to provide for the Server.
OracleHandler interface {
AddResponse(pub *keys.PublicKey, reqID uint64, txSig []byte)
}
// Server represents the JSON-RPC 2.0 server.
Server struct {
http []*http.Server
https []*http.Server
chain Ledger
config config.RPC
// wsReadLimit represents web-socket message limit for a receiving side.
wsReadLimit int64
upgrader websocket.Upgrader
network netmode.Magic
stateRootEnabled bool
coreServer *network.Server
oracle *atomic.Value
log *zap.Logger
shutdown chan struct{}
started atomic.Bool
errChan chan<- error
sessionsLock sync.Mutex
sessions map[string]*session
subsLock sync.RWMutex
subscribers map[*subscriber]bool
subsCounterLock sync.RWMutex
blockSubs int
blockHeaderSubs int
executionSubs int
notificationSubs int
transactionSubs int
notaryRequestSubs int
blockCh chan *block.Block
blockHeaderCh chan *block.Header
executionCh chan *state.AppExecResult
notificationCh chan *state.ContainedNotificationEvent
transactionCh chan *transaction.Transaction
notaryRequestCh chan mempoolevent.Event
subEventsToExitCh chan struct{}
}
// session holds a set of iterators got after invoke* call with corresponding
// finalizer and session expiration timer.
session struct {
// iteratorsLock protects iteratorIdentifiers of the current session.
iteratorsLock sync.Mutex
// iteratorIdentifiers stores the set of Iterator stackitems got either from original invocation
// or from historic MPT-based invocation. In the second case, iteratorIdentifiers are supposed
// to be filled during the first `traverseiterator` call using corresponding params.
iteratorIdentifiers []*iteratorIdentifier
timer *time.Timer
finalize func()
}
// iteratorIdentifier represents Iterator on the server side, holding iterator ID and Iterator stackitem.
iteratorIdentifier struct {
ID string
// Item represents Iterator stackitem.
Item stackitem.Item
}
)
const (
// Disconnection timeout.
wsPongLimit = 60 * time.Second
// Ping period for connection liveness check.
wsPingPeriod = wsPongLimit / 2
// Write deadline.
wsWriteLimit = wsPingPeriod / 2
// Default maximum number of websocket clients per Server.
defaultMaxWebSocketClients = 64
// Maximum number of elements for get*transfers requests.
maxTransfersLimit = 1000
// defaultSessionPoolSize is the number of concurrently running iterator sessions.
defaultSessionPoolSize = 20
)
var rpcHandlers = map[string]func(*Server, params.Params) (any, *neorpc.Error){
"calculatenetworkfee": (*Server).calculateNetworkFee,
"findstates": (*Server).findStates,
"findstorage": (*Server).findStorage,
"findstoragehistoric": (*Server).findStorageHistoric,
"getapplicationlog": (*Server).getApplicationLog,
"getbestblockhash": (*Server).getBestBlockHash,
"getblock": (*Server).getBlock,
"getblockcount": (*Server).getBlockCount,
"getblockhash": (*Server).getBlockHash,
"getblockheader": (*Server).getBlockHeader,
"getblockheadercount": (*Server).getBlockHeaderCount,
"getblocksysfee": (*Server).getBlockSysFee,
"getcandidates": (*Server).getCandidates,
"getcommittee": (*Server).getCommittee,
"getconnectioncount": (*Server).getConnectionCount,
"getcontractstate": (*Server).getContractState,
"getnativecontracts": (*Server).getNativeContracts,
"getnep11balances": (*Server).getNEP11Balances,
"getnep11properties": (*Server).getNEP11Properties,
"getnep11transfers": (*Server).getNEP11Transfers,
"getnep17balances": (*Server).getNEP17Balances,
"getnep17transfers": (*Server).getNEP17Transfers,
"getpeers": (*Server).getPeers,
"getproof": (*Server).getProof,
"getrawmempool": (*Server).getRawMempool,
"getrawnotarypool": (*Server).getRawNotaryPool,
"getrawnotarytransaction": (*Server).getRawNotaryTransaction,
"getrawtransaction": (*Server).getrawtransaction,
"getstate": (*Server).getState,
"getstateheight": (*Server).getStateHeight,
"getstateroot": (*Server).getStateRoot,
"getstorage": (*Server).getStorage,
"getstoragehistoric": (*Server).getStorageHistoric,
"gettransactionheight": (*Server).getTransactionHeight,
"getunclaimedgas": (*Server).getUnclaimedGas,
"getnextblockvalidators": (*Server).getNextBlockValidators,
"getversion": (*Server).getVersion,
"invokefunction": (*Server).invokeFunction,
"invokefunctionhistoric": (*Server).invokeFunctionHistoric,
"invokescript": (*Server).invokescript,
"invokescripthistoric": (*Server).invokescripthistoric,
"invokecontractverify": (*Server).invokeContractVerify,
"invokecontractverifyhistoric": (*Server).invokeContractVerifyHistoric,
"sendrawtransaction": (*Server).sendrawtransaction,
"submitblock": (*Server).submitBlock,
"submitnotaryrequest": (*Server).submitNotaryRequest,
"submitoracleresponse": (*Server).submitOracleResponse,
"terminatesession": (*Server).terminateSession,
"traverseiterator": (*Server).traverseIterator,
"validateaddress": (*Server).validateAddress,
"verifyproof": (*Server).verifyProof,
}
var rpcWsHandlers = map[string]func(*Server, params.Params, *subscriber) (any, *neorpc.Error){
"subscribe": (*Server).subscribe,
"unsubscribe": (*Server).unsubscribe,
}
// New creates a new Server struct. Pay attention that orc is expected to be either
// untyped nil or non-nil structure implementing OracleHandler interface.
func New(chain Ledger, conf config.RPC, coreServer *network.Server,
orc OracleHandler, log *zap.Logger, errChan chan<- error) Server {
protoCfg := chain.GetConfig().ProtocolConfiguration
if conf.SessionEnabled {
if conf.SessionExpirationTime <= 0 {
conf.SessionExpirationTime = max(int(protoCfg.TimePerBlock/time.Second), 5)
log.Info("SessionExpirationTime is not set or wrong, setting default value", zap.Int("SessionExpirationTime", conf.SessionExpirationTime))
}
if conf.SessionPoolSize <= 0 {
conf.SessionPoolSize = defaultSessionPoolSize
log.Info("SessionPoolSize is not set or wrong, setting default value", zap.Int("SessionPoolSize", defaultSessionPoolSize))
}
}
if conf.MaxIteratorResultItems <= 0 {
conf.MaxIteratorResultItems = config.DefaultMaxIteratorResultItems
log.Info("MaxIteratorResultItems is not set or wrong, setting default value", zap.Int("MaxIteratorResultItems", config.DefaultMaxIteratorResultItems))
}
if conf.MaxFindResultItems <= 0 {
conf.MaxFindResultItems = config.DefaultMaxFindResultItems
log.Info("MaxFindResultItems is not set or wrong, setting default value", zap.Int("MaxFindResultItems", config.DefaultMaxFindResultItems))
}
if conf.MaxFindStorageResultItems <= 0 {
conf.MaxFindStorageResultItems = config.DefaultMaxFindStorageResultItems
log.Info("MaxFindStorageResultItems is not set or wrong, setting default value", zap.Int("MaxFindStorageResultItems", config.DefaultMaxFindStorageResultItems))
}
if conf.MaxNEP11Tokens <= 0 {
conf.MaxNEP11Tokens = config.DefaultMaxNEP11Tokens
log.Info("MaxNEP11Tokens is not set or wrong, setting default value", zap.Int("MaxNEP11Tokens", config.DefaultMaxNEP11Tokens))
}
if conf.MaxRequestBodyBytes <= 0 {
conf.MaxRequestBodyBytes = config.DefaultMaxRequestBodyBytes
log.Info("MaxRequestBodyBytes is not set or wong, setting default value", zap.Int("MaxRequestBodyBytes", config.DefaultMaxRequestBodyBytes))
}
if conf.MaxRequestHeaderBytes <= 0 {
conf.MaxRequestHeaderBytes = config.DefaultMaxRequestHeaderBytes
log.Info("MaxRequestHeaderBytes is not set or wong, setting default value", zap.Int("MaxRequestHeaderBytes", config.DefaultMaxRequestHeaderBytes))
}
if conf.MaxWebSocketClients == 0 {
conf.MaxWebSocketClients = defaultMaxWebSocketClients
log.Info("MaxWebSocketClients is not set or wrong, setting default value", zap.Int("MaxWebSocketClients", defaultMaxWebSocketClients))
}
var oracleWrapped = new(atomic.Value)
if orc != nil {
oracleWrapped.Store(orc)
}
var wsOriginChecker func(*http.Request) bool
if conf.EnableCORSWorkaround {
wsOriginChecker = func(_ *http.Request) bool { return true }
}
addrs := conf.Addresses
httpServers := make([]*http.Server, len(addrs))
for i, addr := range addrs {
httpServers[i] = &http.Server{
Addr: addr,
MaxHeaderBytes: conf.MaxRequestHeaderBytes,
}
}
var tlsServers []*http.Server
if cfg := conf.TLSConfig; cfg.Enabled {
addrs := cfg.Addresses
tlsServers = make([]*http.Server, len(addrs))
for i, addr := range addrs {
tlsServers[i] = &http.Server{
Addr: addr,
MaxHeaderBytes: conf.MaxRequestHeaderBytes,
}
}
}
return Server{
http: httpServers,
https: tlsServers,
chain: chain,
config: conf,
wsReadLimit: int64(protoCfg.MaxBlockSize*4)/3 + 1024, // Enough for Base64-encoded content of `submitblock` and `submitp2pnotaryrequest`.
upgrader: websocket.Upgrader{CheckOrigin: wsOriginChecker},
network: protoCfg.Magic,
stateRootEnabled: protoCfg.StateRootInHeader,
coreServer: coreServer,
log: log,
oracle: oracleWrapped,
shutdown: make(chan struct{}),
errChan: errChan,
sessions: make(map[string]*session),
subscribers: make(map[*subscriber]bool),
// These are NOT buffered to preserve original order of events.
blockCh: make(chan *block.Block),
executionCh: make(chan *state.AppExecResult),
notificationCh: make(chan *state.ContainedNotificationEvent),
transactionCh: make(chan *transaction.Transaction),
notaryRequestCh: make(chan mempoolevent.Event),
blockHeaderCh: make(chan *block.Header),
subEventsToExitCh: make(chan struct{}),
}
}
// Name returns service name.
func (s *Server) Name() string {
return "rpc"
}
// Start creates a new JSON-RPC server listening on the configured port. It creates
// goroutines needed internally and it returns its errors via errChan passed to New().
// The Server only starts once, subsequent calls to Start are no-op.
func (s *Server) Start() {
if !s.config.Enabled {
s.log.Info("RPC server is not enabled")
return
}
if !s.started.CompareAndSwap(false, true) {
s.log.Info("RPC server already started")
return
}
go s.handleSubEvents()
for _, srv := range s.http {
srv.Handler = http.HandlerFunc(s.handleHTTPRequest)
s.log.Info("starting rpc-server", zap.String("endpoint", srv.Addr))
ln, err := net.Listen("tcp", srv.Addr)
if err != nil {
s.errChan <- fmt.Errorf("failed to listen on %s: %w", srv.Addr, err)
return
}
srv.Addr = ln.Addr().String() // set Addr to the actual address
go func(server *http.Server) {
err = server.Serve(ln)
if !errors.Is(err, http.ErrServerClosed) {
s.log.Error("failed to start RPC server", zap.Error(err))
s.errChan <- err
}
}(srv)
}
if cfg := s.config.TLSConfig; cfg.Enabled {
for _, srv := range s.https {
srv.Handler = http.HandlerFunc(s.handleHTTPRequest)
s.log.Info("starting rpc-server (https)", zap.String("endpoint", srv.Addr))
ln, err := net.Listen("tcp", srv.Addr)
if err != nil {
s.errChan <- err
return
}
srv.Addr = ln.Addr().String()
go func(srv *http.Server) {
err = srv.ServeTLS(ln, cfg.CertFile, cfg.KeyFile)
if !errors.Is(err, http.ErrServerClosed) {
s.log.Error("failed to start TLS RPC server",
zap.String("endpoint", srv.Addr), zap.Error(err))
s.errChan <- err
}
}(srv)
}
}
}
// Shutdown stops the RPC server if it's running. It can only be called once,
// subsequent calls to Shutdown on the same instance are no-op. The instance
// that was stopped can not be started again by calling Start (use a new
// instance if needed).
func (s *Server) Shutdown() {
if !s.started.CompareAndSwap(true, false) {
return
}
// Signal to websocket writer routines and handleSubEvents.
close(s.shutdown)
if s.config.TLSConfig.Enabled {
for _, srv := range s.https {
s.log.Info("shutting down RPC server (https)", zap.String("endpoint", srv.Addr))
err := srv.Shutdown(context.Background())
if err != nil {
s.log.Warn("error during RPC (https) server shutdown",
zap.String("endpoint", srv.Addr), zap.Error(err))
}
}
}
for _, srv := range s.http {
s.log.Info("shutting down RPC server", zap.String("endpoint", srv.Addr))
err := srv.Shutdown(context.Background())
if err != nil {
s.log.Warn("error during RPC (http) server shutdown",
zap.String("endpoint", srv.Addr), zap.Error(err))
}
}
// Perform sessions finalisation.
if s.config.SessionEnabled {
s.sessionsLock.Lock()
for _, session := range s.sessions {
// Concurrent iterator traversal may still be in process, thus need to protect iteratorIdentifiers access.
session.iteratorsLock.Lock()
session.finalize()
if !session.timer.Stop() {
<-session.timer.C
}
session.iteratorsLock.Unlock()
}
s.sessions = nil
s.sessionsLock.Unlock()
}
// Wait for handleSubEvents to finish.
<-s.subEventsToExitCh
_ = s.log.Sync()
}
// SetOracleHandler allows to update oracle handler used by the Server.
func (s *Server) SetOracleHandler(orc OracleHandler) {
s.oracle.Store(orc)
}
func (s *Server) handleHTTPRequest(w http.ResponseWriter, httpRequest *http.Request) {
// Restrict request body before further processing.
httpRequest.Body = http.MaxBytesReader(w, httpRequest.Body, int64(s.config.MaxRequestBodyBytes))
req := params.NewRequest()
if httpRequest.URL.Path == "/ws" && httpRequest.Method == "GET" {
// Technically there is a race between this check and
// s.subscribers modification 20 lines below, but it's tiny
// and not really critical to bother with it. Some additional
// clients may sneak in, no big deal.
s.subsLock.RLock()
numOfSubs := len(s.subscribers)
s.subsLock.RUnlock()
if numOfSubs >= s.config.MaxWebSocketClients {
s.writeHTTPErrorResponse(
params.NewIn(),
w,
neorpc.NewInternalServerError("websocket users limit reached"),
)
return
}
ws, err := s.upgrader.Upgrade(w, httpRequest, nil)
if err != nil {
s.log.Info("websocket connection upgrade failed", zap.Error(err))
return
}
resChan := make(chan abstractResult) // response.abstract or response.abstractBatch
subChan := make(chan intEvent, notificationBufSize)
subscr := &subscriber{writer: subChan}
s.subsLock.Lock()
s.subscribers[subscr] = true
s.subsLock.Unlock()
go s.handleWsWrites(ws, resChan, subChan)
s.handleWsReads(ws, resChan, subscr)
return
}
if httpRequest.Method == "OPTIONS" && s.config.EnableCORSWorkaround { // Preflight CORS.
setCORSOriginHeaders(w.Header())
w.Header().Set("Access-Control-Allow-Methods", "GET, POST") // GET for websockets.
w.Header().Set("Access-Control-Max-Age", "21600") // 6 hours.
return
}
if httpRequest.Method != "POST" {
s.writeHTTPErrorResponse(
params.NewIn(),
w,
neorpc.NewInvalidParamsError(fmt.Sprintf("invalid method '%s', please retry with 'POST'", httpRequest.Method)),
)
return
}
err := req.DecodeData(httpRequest.Body)
if err != nil {
s.writeHTTPErrorResponse(params.NewIn(), w, neorpc.NewParseError(err.Error()))
return
}
resp := s.handleRequest(req, nil)
s.writeHTTPServerResponse(req, w, resp)
}
// RegisterLocal performs local client registration.
func (s *Server) RegisterLocal(ctx context.Context, events chan<- neorpc.Notification) func(*neorpc.Request) (*neorpc.Response, error) {
subChan := make(chan intEvent, notificationBufSize)
subscr := &subscriber{writer: subChan}
s.subsLock.Lock()
s.subscribers[subscr] = true
s.subsLock.Unlock()
go s.handleLocalNotifications(ctx, events, subChan, subscr)
return func(req *neorpc.Request) (*neorpc.Response, error) {
return s.handleInternal(req, subscr)
}
}
func (s *Server) handleRequest(req *params.Request, sub *subscriber) abstractResult {
if req.In != nil {
req.In.Method = escapeForLog(req.In.Method) // No valid method name will be changed by it.
return s.handleIn(req.In, sub)
}
resp := make(abstractBatch, len(req.Batch))
for i, in := range req.Batch {
in.Method = escapeForLog(in.Method) // No valid method name will be changed by it.
resp[i] = s.handleIn(&in, sub)
}
return resp
}
// handleInternal is an experimental interface to handle client requests directly.
func (s *Server) handleInternal(req *neorpc.Request, sub *subscriber) (*neorpc.Response, error) {
var (
res any
rpcRes = &neorpc.Response{
HeaderAndError: neorpc.HeaderAndError{
Header: neorpc.Header{
JSONRPC: req.JSONRPC,
ID: json.RawMessage(strconv.FormatUint(req.ID, 10)),
},
},
}
)
reqParams, err := params.FromAny(req.Params)
if err != nil {
return nil, err
}
s.log.Debug("processing local rpc request",
zap.String("method", req.Method),
zap.Stringer("params", reqParams))
start := time.Now()
defer func() { addReqTimeMetric(req.Method, time.Since(start)) }()
rpcRes.Error = neorpc.NewMethodNotFoundError(fmt.Sprintf("method %q not supported", req.Method))
handler, ok := rpcHandlers[req.Method]
if ok {
res, rpcRes.Error = handler(s, reqParams)
} else if sub != nil {
handler, ok := rpcWsHandlers[req.Method]
if ok {
res, rpcRes.Error = handler(s, reqParams, sub)
}
}
if res != nil {
b, err := json.Marshal(res)
if err != nil {
return nil, fmt.Errorf("response can't be JSONized: %w", err)
}
rpcRes.Result = json.RawMessage(b)
}
return rpcRes, nil
}
func (s *Server) handleIn(req *params.In, sub *subscriber) abstract {
var res any
var resErr *neorpc.Error
if req.JSONRPC != neorpc.JSONRPCVersion {
return s.packResponse(req, nil, neorpc.NewInvalidParamsError(fmt.Sprintf("problem parsing JSON: invalid version, expected 2.0 got '%s'", req.JSONRPC)))
}
reqParams := params.Params(req.RawParams)
s.log.Debug("processing rpc request",
zap.String("method", req.Method),
zap.Stringer("params", reqParams))
start := time.Now()
defer func() { addReqTimeMetric(req.Method, time.Since(start)) }()
resErr = neorpc.NewMethodNotFoundError(fmt.Sprintf("method %q not supported", req.Method))
handler, ok := rpcHandlers[req.Method]
if ok {
res, resErr = handler(s, reqParams)
} else if sub != nil {
handler, ok := rpcWsHandlers[req.Method]
if ok {
res, resErr = handler(s, reqParams, sub)
}
}
return s.packResponse(req, res, resErr)
}
func (s *Server) handleLocalNotifications(ctx context.Context, events chan<- neorpc.Notification, subChan <-chan intEvent, subscr *subscriber) {
eventloop:
for {
select {
case <-s.shutdown:
break eventloop
case <-ctx.Done():
break eventloop
case ev := <-subChan:
events <- *ev.ntf // Make a copy.
}
}
close(events)
s.dropSubscriber(subscr)
drainloop:
for {
select {
case <-subChan:
default:
break drainloop
}
}
}
func (s *Server) handleWsWrites(ws *websocket.Conn, resChan <-chan abstractResult, subChan <-chan intEvent) {
pingTicker := time.NewTicker(wsPingPeriod)
eventloop:
for {
select {
case <-s.shutdown:
break eventloop
case event, ok := <-subChan:
if !ok {
break eventloop
}
if err := ws.SetWriteDeadline(time.Now().Add(wsWriteLimit)); err != nil {
break eventloop
}
if err := ws.WritePreparedMessage(event.msg); err != nil {
break eventloop
}
case res, ok := <-resChan:
if !ok {
break eventloop
}
if err := ws.SetWriteDeadline(time.Now().Add(wsWriteLimit)); err != nil {
break eventloop
}
if err := ws.WriteJSON(res); err != nil {
break eventloop
}
case <-pingTicker.C:
if err := ws.SetWriteDeadline(time.Now().Add(wsWriteLimit)); err != nil {
break eventloop
}
if err := ws.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
break eventloop
}
}
}
ws.Close()
pingTicker.Stop()
// Drain notification channel as there might be some goroutines blocked
// on it.
drainloop:
for {
select {
case _, ok := <-subChan:
if !ok {
break drainloop
}
default:
break drainloop
}
}
}
func (s *Server) handleWsReads(ws *websocket.Conn, resChan chan<- abstractResult, subscr *subscriber) {
ws.SetReadLimit(s.wsReadLimit)
err := ws.SetReadDeadline(time.Now().Add(wsPongLimit))
ws.SetPongHandler(func(string) error { return ws.SetReadDeadline(time.Now().Add(wsPongLimit)) })
requestloop:
for err == nil {
req := params.NewRequest()
err := ws.ReadJSON(req)
if err != nil {
break
}
res := s.handleRequest(req, subscr)
res.RunForErrors(func(jsonErr *neorpc.Error) {
s.logRequestError(req, jsonErr)
})
select {
case <-s.shutdown:
break requestloop
case resChan <- res:
}
}
s.dropSubscriber(subscr)
close(resChan)
ws.Close()
}
func (s *Server) dropSubscriber(subscr *subscriber) {
s.subsLock.Lock()
delete(s.subscribers, subscr)
s.subsLock.Unlock()
s.subsCounterLock.Lock()
for _, e := range subscr.feeds {
if e.event != neorpc.InvalidEventID {
s.unsubscribeFromChannel(e.event)
}
}
s.subsCounterLock.Unlock()
}
func (s *Server) getBestBlockHash(_ params.Params) (any, *neorpc.Error) {
return "0x" + s.chain.CurrentBlockHash().StringLE(), nil
}
func (s *Server) getBlockCount(_ params.Params) (any, *neorpc.Error) {
return s.chain.BlockHeight() + 1, nil
}
func (s *Server) getBlockHeaderCount(_ params.Params) (any, *neorpc.Error) {
return s.chain.HeaderHeight() + 1, nil
}
func (s *Server) getConnectionCount(_ params.Params) (any, *neorpc.Error) {
return s.coreServer.PeerCount(), nil
}
func (s *Server) blockHashFromParam(param *params.Param) (util.Uint256, *neorpc.Error) {
var (
hash util.Uint256
err error
)
if param == nil {
return hash, neorpc.ErrInvalidParams
}
if hash, err = param.GetUint256(); err != nil {
num, respErr := s.blockHeightFromParam(param)
if respErr != nil {
return hash, respErr
}
hash = s.chain.GetHeaderHash(num)
}
return hash, nil
}
func (s *Server) fillBlockMetadata(obj io.Serializable, h *block.Header) result.BlockMetadata {
res := result.BlockMetadata{
Size: io.GetVarSize(obj), // obj can be a Block or a Header.
Confirmations: s.chain.BlockHeight() - h.Index + 1,
}
hash := s.chain.GetHeaderHash(h.Index + 1)
if !hash.Equals(util.Uint256{}) {
res.NextBlockHash = &hash
}
return res
}
func (s *Server) getBlock(reqParams params.Params) (any, *neorpc.Error) {
param := reqParams.Value(0)
hash, respErr := s.blockHashFromParam(param)
if respErr != nil {
return nil, respErr
}
block, err := s.chain.GetBlock(hash)
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnknownBlock, err.Error())
}
if v, _ := reqParams.Value(1).GetBoolean(); v {
res := result.Block{
Block: *block,
BlockMetadata: s.fillBlockMetadata(block, &block.Header),
}
return res, nil
}
writer := io.NewBufBinWriter()
block.EncodeBinary(writer.BinWriter)
return writer.Bytes(), nil
}
func (s *Server) getBlockHash(reqParams params.Params) (any, *neorpc.Error) {
num, err := s.blockHeightFromParam(reqParams.Value(0))
if err != nil {
return nil, err
}
return s.chain.GetHeaderHash(num), nil
}
func (s *Server) getVersion(_ params.Params) (any, *neorpc.Error) {
port, err := s.coreServer.Port(nil) // any port will suite
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("cannot fetch tcp port: %s", err))
}
cfg := s.chain.GetConfig()
hfs := make(map[config.Hardfork]uint32, len(cfg.Hardforks))
for _, cfgHf := range config.Hardforks {
height, ok := cfg.Hardforks[cfgHf.String()]
if !ok {
continue
}
hfs[cfgHf] = height
}
standbyCommittee, err := keys.NewPublicKeysFromStrings(cfg.StandbyCommittee)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("cannot fetch standbyCommittee: %s", err))
}
return &result.Version{
TCPPort: port,
Nonce: s.coreServer.ID(),
UserAgent: s.coreServer.UserAgent,
RPC: result.RPC{
MaxIteratorResultItems: s.config.MaxIteratorResultItems,
SessionEnabled: s.config.SessionEnabled,
},
Protocol: result.Protocol{
AddressVersion: address.NEO3Prefix,
Network: cfg.Magic,
MillisecondsPerBlock: int(cfg.TimePerBlock / time.Millisecond),
MaxTraceableBlocks: cfg.MaxTraceableBlocks,
MaxValidUntilBlockIncrement: cfg.MaxValidUntilBlockIncrement,
MaxTransactionsPerBlock: cfg.MaxTransactionsPerBlock,
MemoryPoolMaxTransactions: cfg.MemPoolSize,
ValidatorsCount: byte(cfg.GetNumOfCNs(s.chain.BlockHeight())),
InitialGasDistribution: cfg.InitialGASSupply,
Hardforks: hfs,
StandbyCommittee: standbyCommittee,
SeedList: cfg.SeedList,
CommitteeHistory: cfg.CommitteeHistory,
P2PSigExtensions: cfg.P2PSigExtensions,
StateRootInHeader: cfg.StateRootInHeader,
ValidatorsHistory: cfg.ValidatorsHistory,
},
}, nil
}
func (s *Server) getPeers(_ params.Params) (any, *neorpc.Error) {
peers := result.NewGetPeers()
peers.AddUnconnected(s.coreServer.UnconnectedPeers())
peers.AddConnected(s.coreServer.ConnectedPeers())
peers.AddBad(s.coreServer.BadPeers())
return peers, nil
}
func (s *Server) getRawMempool(reqParams params.Params) (any, *neorpc.Error) {
verbose, _ := reqParams.Value(0).GetBoolean()
mp := s.chain.GetMemPool()
txes := mp.GetVerifiedTransactions()
hashList := make([]util.Uint256, len(txes))
for i := range txes {
hashList[i] = txes[i].Hash()
}
if !verbose {
return hashList, nil
}
return result.RawMempool{
Height: s.chain.BlockHeight(),
Verified: hashList,
Unverified: []util.Uint256{}, // avoid `null` result
}, nil
}
func (s *Server) validateAddress(reqParams params.Params) (any, *neorpc.Error) {
param, err := reqParams.Value(0).GetString()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
return result.ValidateAddress{
Address: reqParams.Value(0),
IsValid: validateAddress(param),
}, nil
}
// calculateNetworkFee calculates network fee for the transaction.
func (s *Server) calculateNetworkFee(reqParams params.Params) (any, *neorpc.Error) {
if len(reqParams) < 1 {
return 0, neorpc.ErrInvalidParams
}
byteTx, err := reqParams[0].GetBytesBase64()
if err != nil {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
tx, err := transaction.NewTransactionFromBytes(byteTx)
if err != nil {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
hashablePart, err := tx.EncodeHashableFields()
if err != nil {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("failed to compute tx size: %s", err))
}
size := len(hashablePart) + io.GetVarSize(len(tx.Signers))
var (
netFee int64
// Verification GAS cost can't exceed chin policy, but RPC config can limit it further.
gasLimit = min(s.chain.GetMaxVerificationGAS(), int64(s.config.MaxGasInvoke))
)
for i, signer := range tx.Signers {
w := tx.Scripts[i]
if len(w.InvocationScript) == 0 { // No invocation provided, try to infer one.
var paramz []manifest.Parameter
if len(w.VerificationScript) == 0 { // Contract-based verification
cs := s.chain.GetContractState(signer.Account)
if cs == nil {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidVerificationFunction, fmt.Sprintf("signer %d has no verification script and no deployed contract", i))
}
md := cs.Manifest.ABI.GetMethod(manifest.MethodVerify, -1)
if md == nil || md.ReturnType != smartcontract.BoolType {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidVerificationFunction, fmt.Sprintf("signer %d has no verify method in deployed contract", i))
}
paramz = md.Parameters // Might as well have none params and it's OK.
} else { // Regular signature verification.
if vm.IsSignatureContract(w.VerificationScript) {
paramz = []manifest.Parameter{{Type: smartcontract.SignatureType}}
} else if nSigs, _, ok := vm.ParseMultiSigContract(w.VerificationScript); ok {
paramz = make([]manifest.Parameter, nSigs)
for j := range paramz {
paramz[j] = manifest.Parameter{Type: smartcontract.SignatureType}
}
}
}
inv := io.NewBufBinWriter()
for _, p := range paramz {
p.Type.EncodeDefaultValue(inv.BinWriter)
}
if inv.Err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to create dummy invocation script (signer %d): %s", i, inv.Err.Error()))
}
w.InvocationScript = inv.Bytes()
}
gasConsumed, err := s.chain.VerifyWitness(signer.Account, tx, &w, gasLimit)
if err != nil && !errors.Is(err, core.ErrInvalidSignature) {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidSignature, fmt.Sprintf("witness %d: %s", i, err))
}
gasLimit -= gasConsumed
netFee += gasConsumed
size += io.GetVarSize(w.VerificationScript) + io.GetVarSize(w.InvocationScript)
}
netFee += int64(size)*s.chain.FeePerByte() + s.chain.CalculateAttributesFee(tx)
return result.NetworkFee{Value: netFee}, nil
}
// getApplicationLog returns the contract log based on the specified txid or blockid.
func (s *Server) getApplicationLog(reqParams params.Params) (any, *neorpc.Error) {
hash, err := reqParams.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
trig := trigger.All
if len(reqParams) > 1 {
trigString, err := reqParams.Value(1).GetString()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
trig, err = trigger.FromString(trigString)
if err != nil {
return nil, neorpc.ErrInvalidParams
}
}
appExecResults, err := s.chain.GetAppExecResults(hash, trigger.All)
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnknownScriptContainer, fmt.Sprintf("failed to locate application log: %s", err))
}
return result.NewApplicationLog(hash, appExecResults, trig), nil
}
func (s *Server) getNEP11Tokens(h util.Uint160, acc util.Uint160, bw *io.BufBinWriter) ([]stackitem.Item, string, int, error) {
items, finalize, err := s.invokeReadOnlyMulti(bw, h, []string{"tokensOf", "symbol", "decimals"}, [][]any{{acc}, nil, nil})
if err != nil {
return nil, "", 0, err
}
defer finalize()
if (items[0].Type() != stackitem.InteropT) || !iterator.IsIterator(items[0]) {
return nil, "", 0, fmt.Errorf("invalid `tokensOf` result type %s", items[0].String())
}
vals := iterator.Values(items[0], s.config.MaxNEP11Tokens)
sym, err := stackitem.ToString(items[1])
if err != nil {
return nil, "", 0, fmt.Errorf("`symbol` return value error: %w", err)
}
dec, err := items[2].TryInteger()
if err != nil {
return nil, "", 0, fmt.Errorf("`decimals` return value error: %w", err)
}
if !dec.IsInt64() || dec.Sign() == -1 || dec.Int64() > math.MaxInt32 {
return nil, "", 0, errors.New("`decimals` returned a bad integer")
}
return vals, sym, int(dec.Int64()), nil
}
func (s *Server) getNEP11Balances(ps params.Params) (any, *neorpc.Error) {
u, err := ps.Value(0).GetUint160FromAddressOrHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
bs := &result.NEP11Balances{
Address: address.Uint160ToString(u),
Balances: []result.NEP11AssetBalance{},
}
lastUpdated, err := s.chain.GetTokenLastUpdated(u)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Failed to get NEP-11 last updated block: %s", err.Error()))
}
var count int
stateSyncPoint := lastUpdated[math.MinInt32]
bw := io.NewBufBinWriter()
contract_loop:
for _, h := range s.chain.GetNEP11Contracts() {
toks, sym, dec, err := s.getNEP11Tokens(h, u, bw)
if err != nil {
continue
}
if len(toks) == 0 {
continue
}
cs := s.chain.GetContractState(h)
if cs == nil {
continue
}
isDivisible := (standard.ComplyABI(&cs.Manifest, standard.Nep11Divisible) == nil)
lub, ok := lastUpdated[cs.ID]
if !ok {
cfg := s.chain.GetConfig()
if !cfg.P2PStateExchangeExtensions && cfg.Ledger.RemoveUntraceableBlocks {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get LastUpdatedBlock for balance of %s token: internal database inconsistency", cs.Hash.StringLE()))
}
lub = stateSyncPoint
}
bs.Balances = append(bs.Balances, result.NEP11AssetBalance{
Asset: h,
Decimals: dec,
Name: cs.Manifest.Name,
Symbol: sym,
Tokens: make([]result.NEP11TokenBalance, 0, len(toks)),
})
curAsset := &bs.Balances[len(bs.Balances)-1]
for i := range toks {
id, err := toks[i].TryBytes()
if err != nil || len(id) > limits.MaxStorageKeyLen {
continue
}
var amount = "1"
if isDivisible {
balance, err := s.getNEP11DTokenBalance(h, u, id, bw)
if err != nil {
continue
}
if balance.Sign() == 0 {
continue
}
amount = balance.String()
}
count++
curAsset.Tokens = append(curAsset.Tokens, result.NEP11TokenBalance{
ID: hex.EncodeToString(id),
Amount: amount,
LastUpdated: lub,
})
if count >= s.config.MaxNEP11Tokens {
break contract_loop
}
}
}
return bs, nil
}
func (s *Server) invokeNEP11Properties(h util.Uint160, id []byte, bw *io.BufBinWriter) ([]stackitem.MapElement, error) {
item, finalize, err := s.invokeReadOnly(bw, h, "properties", id)
if err != nil {
return nil, err
}
defer finalize()
if item.Type() != stackitem.MapT {
return nil, fmt.Errorf("invalid `properties` result type %s", item.String())
}
return item.Value().([]stackitem.MapElement), nil
}
func (s *Server) getNEP11Properties(ps params.Params) (any, *neorpc.Error) {
asset, err := ps.Value(0).GetUint160FromAddressOrHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
token, err := ps.Value(1).GetBytesHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
props, err := s.invokeNEP11Properties(asset, token, nil)
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrExecutionFailed, fmt.Sprintf("Failed to get NEP-11 properties: %s", err.Error()))
}
res := make(map[string]any)
for _, kv := range props {
key, err := kv.Key.TryBytes()
if err != nil {
continue
}
var val any
if result.KnownNEP11Properties[string(key)] || kv.Value.Type() != stackitem.AnyT {
v, err := kv.Value.TryBytes()
if err != nil {
continue
}
if result.KnownNEP11Properties[string(key)] {
val = string(v)
} else {
val = v
}
}
res[string(key)] = val
}
return res, nil
}
func (s *Server) getNEP17Balances(ps params.Params) (any, *neorpc.Error) {
u, err := ps.Value(0).GetUint160FromAddressOrHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
bs := &result.NEP17Balances{
Address: address.Uint160ToString(u),
Balances: []result.NEP17Balance{},
}
lastUpdated, err := s.chain.GetTokenLastUpdated(u)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Failed to get NEP-17 last updated block: %s", err.Error()))
}
stateSyncPoint := lastUpdated[math.MinInt32]
bw := io.NewBufBinWriter()
for _, h := range s.chain.GetNEP17Contracts() {
balance, sym, dec, err := s.getNEP17TokenBalance(h, u, bw)
if err != nil {
continue
}
if balance.Sign() == 0 {
continue
}
cs := s.chain.GetContractState(h)
if cs == nil {
continue
}
lub, ok := lastUpdated[cs.ID]
if !ok {
cfg := s.chain.GetConfig()
if !cfg.P2PStateExchangeExtensions && cfg.Ledger.RemoveUntraceableBlocks {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get LastUpdatedBlock for balance of %s token: internal database inconsistency", cs.Hash.StringLE()))
}
lub = stateSyncPoint
}
bs.Balances = append(bs.Balances, result.NEP17Balance{
Asset: h,
Amount: balance.String(),
Decimals: dec,
LastUpdated: lub,
Name: cs.Manifest.Name,
Symbol: sym,
})
}
return bs, nil
}
func (s *Server) invokeReadOnly(bw *io.BufBinWriter, h util.Uint160, method string, params ...any) (stackitem.Item, func(), error) {
r, f, err := s.invokeReadOnlyMulti(bw, h, []string{method}, [][]any{params})
if err != nil {
return nil, nil, err
}
return r[0], f, nil
}
func (s *Server) invokeReadOnlyMulti(bw *io.BufBinWriter, h util.Uint160, methods []string, params [][]any) ([]stackitem.Item, func(), error) {
if bw == nil {
bw = io.NewBufBinWriter()
} else {
bw.Reset()
}
if len(methods) != len(params) {
return nil, nil, fmt.Errorf("asymmetric parameters")
}
for i := range methods {
emit.AppCall(bw.BinWriter, h, methods[i], callflag.ReadStates|callflag.AllowCall, params[i]...)
if bw.Err != nil {
return nil, nil, fmt.Errorf("failed to create `%s` invocation script: %w", methods[i], bw.Err)
}
}
script := bw.Bytes()
tx := &transaction.Transaction{Script: script}
ic, err := s.chain.GetTestVM(trigger.Application, tx, nil)
if err != nil {
return nil, nil, fmt.Errorf("faile to prepare test VM: %w", err)
}
ic.VM.GasLimit = core.HeaderVerificationGasLimit
ic.VM.LoadScriptWithFlags(script, callflag.All)
err = ic.VM.Run()
if err != nil {
ic.Finalize()
return nil, nil, fmt.Errorf("failed to run %d methods of %s: %w", len(methods), h.StringLE(), err)
}
estack := ic.VM.Estack()
if estack.Len() != len(methods) {
ic.Finalize()
return nil, nil, fmt.Errorf("invalid return values count: expected %d, got %d", len(methods), estack.Len())
}
return estack.ToArray(), ic.Finalize, nil
}
func (s *Server) getNEP17TokenBalance(h util.Uint160, acc util.Uint160, bw *io.BufBinWriter) (*big.Int, string, int, error) {
items, finalize, err := s.invokeReadOnlyMulti(bw, h, []string{"balanceOf", "symbol", "decimals"}, [][]any{{acc}, nil, nil})
if err != nil {
return nil, "", 0, err
}
finalize()
res, err := items[0].TryInteger()
if err != nil {
return nil, "", 0, fmt.Errorf("unexpected `balanceOf` result type: %w", err)
}
sym, err := stackitem.ToString(items[1])
if err != nil {
return nil, "", 0, fmt.Errorf("`symbol` return value error: %w", err)
}
dec, err := items[2].TryInteger()
if err != nil {
return nil, "", 0, fmt.Errorf("`decimals` return value error: %w", err)
}
if !dec.IsInt64() || dec.Sign() == -1 || dec.Int64() > math.MaxInt32 {
return nil, "", 0, errors.New("`decimals` returned a bad integer")
}
return res, sym, int(dec.Int64()), nil
}
func (s *Server) getNEP11DTokenBalance(h util.Uint160, acc util.Uint160, id []byte, bw *io.BufBinWriter) (*big.Int, error) {
item, finalize, err := s.invokeReadOnly(bw, h, "balanceOf", acc, id)
if err != nil {
return nil, err
}
finalize()
res, err := item.TryInteger()
if err != nil {
return nil, fmt.Errorf("unexpected `balanceOf` result type: %w", err)
}
return res, nil
}
func getTimestampsAndLimit(ps params.Params, index int) (uint64, uint64, int, int, error) {
var start, end uint64
var limit, page int
limit = maxTransfersLimit
pStart, pEnd, pLimit, pPage := ps.Value(index), ps.Value(index+1), ps.Value(index+2), ps.Value(index+3)
if pPage != nil {
p, err := pPage.GetInt()
if err != nil {
return 0, 0, 0, 0, err
}
if p < 0 {
return 0, 0, 0, 0, errors.New("can't use negative page")
}
page = p
}
if pLimit != nil {
l, err := pLimit.GetInt()
if err != nil {
return 0, 0, 0, 0, err
}
if l <= 0 {
return 0, 0, 0, 0, errors.New("can't use negative or zero limit")
}
if l > maxTransfersLimit {
return 0, 0, 0, 0, errors.New("too big limit requested")
}
limit = l
}
if pEnd != nil {
val, err := pEnd.GetInt()
if err != nil {
return 0, 0, 0, 0, err
}
end = uint64(val)
} else {
end = uint64(time.Now().Unix() * 1000)
}
if pStart != nil {
val, err := pStart.GetInt()
if err != nil {
return 0, 0, 0, 0, err
}
start = uint64(val)
} else {
start = uint64(time.Now().Add(-time.Hour*24*7).Unix() * 1000)
}
return start, end, limit, page, nil
}
func (s *Server) getNEP11Transfers(ps params.Params) (any, *neorpc.Error) {
return s.getTokenTransfers(ps, true)
}
func (s *Server) getNEP17Transfers(ps params.Params) (any, *neorpc.Error) {
return s.getTokenTransfers(ps, false)
}
func (s *Server) getTokenTransfers(ps params.Params, isNEP11 bool) (any, *neorpc.Error) {
u, err := ps.Value(0).GetUint160FromAddressOrHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
start, end, limit, page, err := getTimestampsAndLimit(ps, 1)
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("malformed timestamps/limit: %s", err))
}
bs := &tokenTransfers{
Address: address.Uint160ToString(u),
Received: []any{},
Sent: []any{},
}
cache := make(map[int32]util.Uint160)
var resCount, frameCount int
// handleTransfer returns items to be added into the received and sent arrays
// along with a continue flag and error.
var handleTransfer = func(tr *state.NEP17Transfer) (*result.NEP17Transfer, *result.NEP17Transfer, bool, error) {
var received, sent *result.NEP17Transfer
// Iterating from the newest to the oldest, not yet reached required
// time frame, continue looping.
if tr.Timestamp > end {
return nil, nil, true, nil
}
// Iterating from the newest to the oldest, moved past required
// time frame, stop looping.
if tr.Timestamp < start {
return nil, nil, false, nil
}
frameCount++
// Using limits, not yet reached required page.
if limit != 0 && page*limit >= frameCount {
return nil, nil, true, nil
}
h, err := s.getHash(tr.Asset, cache)
if err != nil {
return nil, nil, false, err
}
transfer := result.NEP17Transfer{
Timestamp: tr.Timestamp,
Asset: h,
Index: tr.Block,
TxHash: tr.Tx,
}
if !tr.Counterparty.Equals(util.Uint160{}) {
transfer.Address = address.Uint160ToString(tr.Counterparty)
}
if tr.Amount.Sign() > 0 { // token was received
transfer.Amount = tr.Amount.String()
received = &result.NEP17Transfer{}
*received = transfer // Make a copy, transfer is to be modified below.
} else {
transfer.Amount = new(big.Int).Neg(tr.Amount).String()
sent = &result.NEP17Transfer{}
*sent = transfer
}
resCount++
// Check limits for continue flag.
return received, sent, !(limit != 0 && resCount >= limit), nil
}
if !isNEP11 {
err = s.chain.ForEachNEP17Transfer(u, end, func(tr *state.NEP17Transfer) (bool, error) {
r, s, res, err := handleTransfer(tr)
if err == nil {
if r != nil {
bs.Received = append(bs.Received, r)
}
if s != nil {
bs.Sent = append(bs.Sent, s)
}
}
return res, err
})
} else {
err = s.chain.ForEachNEP11Transfer(u, end, func(tr *state.NEP11Transfer) (bool, error) {
r, s, res, err := handleTransfer(&tr.NEP17Transfer)
if err == nil {
id := hex.EncodeToString(tr.ID)
if r != nil {
bs.Received = append(bs.Received, nep17TransferToNEP11(r, id))
}
if s != nil {
bs.Sent = append(bs.Sent, nep17TransferToNEP11(s, id))
}
}
return res, err
})
}
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("invalid transfer log: %s", err))
}
return bs, nil
}
// getHash returns the hash of the contract by its ID using cache.
func (s *Server) getHash(contractID int32, cache map[int32]util.Uint160) (util.Uint160, error) {
if d, ok := cache[contractID]; ok {
return d, nil
}
h, err := s.chain.GetContractScriptHash(contractID)
if err != nil {
return util.Uint160{}, err
}
cache[contractID] = h
return h, nil
}
func (s *Server) contractIDFromParam(param *params.Param, root ...util.Uint256) (int32, *neorpc.Error) {
var result int32
if param == nil {
return 0, neorpc.ErrInvalidParams
}
if scriptHash, err := param.GetUint160FromHex(); err == nil {
if len(root) == 0 {
cs := s.chain.GetContractState(scriptHash)
if cs == nil {
return 0, neorpc.ErrUnknownContract
}
result = cs.ID
} else {
cs, respErr := s.getHistoricalContractState(root[0], scriptHash)
if respErr != nil {
return 0, respErr
}
result = cs.ID
}
} else {
id, err := param.GetInt()
if err != nil {
return 0, neorpc.ErrInvalidParams
}
if err := checkInt32(id); err != nil {
return 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
result = int32(id)
}
return result, nil
}
// getContractScriptHashFromParam returns the contract script hash by hex contract hash, address, id or native contract name.
func (s *Server) contractScriptHashFromParam(param *params.Param) (util.Uint160, *neorpc.Error) {
var result util.Uint160
if param == nil {
return result, neorpc.ErrInvalidParams
}
nameOrHashOrIndex, err := param.GetString()
if err != nil {
return result, neorpc.ErrInvalidParams
}
result, err = param.GetUint160FromAddressOrHex()
if err == nil {
return result, nil
}
result, err = s.chain.GetNativeContractScriptHash(nameOrHashOrIndex)
if err == nil {
return result, nil
}
id, err := strconv.Atoi(nameOrHashOrIndex)
if err != nil {
return result, neorpc.NewInvalidParamsError(fmt.Sprintf("Invalid contract identifier (name/hash/index is expected) : %s", err.Error()))
}
if err := checkInt32(id); err != nil {
return result, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
result, err = s.chain.GetContractScriptHash(int32(id))
if err != nil {
return result, neorpc.ErrUnknownContract
}
return result, nil
}
func makeStorageKey(id int32, key []byte) []byte {
skey := make([]byte, 4+len(key))
binary.LittleEndian.PutUint32(skey, uint32(id))
copy(skey[4:], key)
return skey
}
var errKeepOnlyLatestState = errors.New("'KeepOnlyLatestState' setting is enabled")
func (s *Server) getProof(ps params.Params) (any, *neorpc.Error) {
if s.chain.GetConfig().Ledger.KeepOnlyLatestState {
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnsupportedState, fmt.Sprintf("'getproof' is not supported: %s", errKeepOnlyLatestState))
}
root, err := ps.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
sc, err := ps.Value(1).GetUint160FromHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
key, err := ps.Value(2).GetBytesBase64()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
cs, respErr := s.getHistoricalContractState(root, sc)
if respErr != nil {
return nil, respErr
}
skey := makeStorageKey(cs.ID, key)
proof, err := s.chain.GetStateModule().GetStateProof(root, skey)
if err != nil {
if errors.Is(err, mpt.ErrNotFound) {
return nil, neorpc.ErrUnknownStorageItem
}
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get proof: %s", err))
}
return &result.ProofWithKey{
Key: skey,
Proof: proof,
}, nil
}
func (s *Server) verifyProof(ps params.Params) (any, *neorpc.Error) {
if s.chain.GetConfig().Ledger.KeepOnlyLatestState {
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnsupportedState, fmt.Sprintf("'verifyproof' is not supported: %s", errKeepOnlyLatestState))
}
root, err := ps.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
proofStr, err := ps.Value(1).GetString()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
var p result.ProofWithKey
if err := p.FromString(proofStr); err != nil {
return nil, neorpc.ErrInvalidParams
}
vp := new(result.VerifyProof)
val, ok := mpt.VerifyProof(root, p.Key, p.Proof)
if !ok {
return nil, neorpc.ErrInvalidProof
}
vp.Value = val
return vp, nil
}
func (s *Server) getState(ps params.Params) (any, *neorpc.Error) {
root, respErr := s.getStateRootFromParam(ps.Value(0))
if respErr != nil {
return nil, respErr
}
csHash, err := ps.Value(1).GetUint160FromHex()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, "invalid contract hash")
}
key, err := ps.Value(2).GetBytesBase64()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, "invalid key")
}
cs, respErr := s.getHistoricalContractState(root, csHash)
if respErr != nil {
return nil, respErr
}
sKey := makeStorageKey(cs.ID, key)
res, err := s.chain.GetStateModule().GetState(root, sKey)
if err != nil {
if errors.Is(err, mpt.ErrNotFound) {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid key: %s", err.Error()))
}
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Failed to get historical item state: %s", err.Error()))
}
return res, nil
}
func (s *Server) findStates(ps params.Params) (any, *neorpc.Error) {
root, respErr := s.getStateRootFromParam(ps.Value(0))
if respErr != nil {
return nil, respErr
}
csHash, err := ps.Value(1).GetUint160FromHex()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid contract hash: %s", err))
}
prefix, err := ps.Value(2).GetBytesBase64()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid prefix: %s", err))
}
var (
key []byte
count = s.config.MaxFindResultItems
)
if len(ps) > 3 {
key, err = ps.Value(3).GetBytesBase64()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid key: %s", err))
}
if len(key) > 0 {
if !bytes.HasPrefix(key, prefix) {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, "key doesn't match prefix")
}
key = key[len(prefix):]
} else {
// empty ("") key shouldn't exclude item matching prefix from the result
key = nil
}
}
if len(ps) > 4 {
count, err = ps.Value(4).GetInt()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid count: %s", err))
}
count = min(count, s.config.MaxFindResultItems)
}
cs, respErr := s.getHistoricalContractState(root, csHash)
if respErr != nil {
return nil, respErr
}
pKey := makeStorageKey(cs.ID, prefix)
kvs, err := s.chain.GetStateModule().FindStates(root, pKey, key, count+1) // +1 to define result truncation
if err != nil && !errors.Is(err, mpt.ErrNotFound) {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to find state items: %s", err))
}
res := result.FindStates{}
if len(kvs) == count+1 {
res.Truncated = true
kvs = kvs[:len(kvs)-1]
}
if len(kvs) > 0 {
proof, err := s.chain.GetStateModule().GetStateProof(root, kvs[0].Key)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get first proof: %s", err))
}
res.FirstProof = &result.ProofWithKey{
Key: kvs[0].Key,
Proof: proof,
}
}
if len(kvs) > 1 {
proof, err := s.chain.GetStateModule().GetStateProof(root, kvs[len(kvs)-1].Key)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get last proof: %s", err))
}
res.LastProof = &result.ProofWithKey{
Key: kvs[len(kvs)-1].Key,
Proof: proof,
}
}
res.Results = make([]result.KeyValue, len(kvs))
for i, kv := range kvs {
res.Results[i] = result.KeyValue{
Key: kv.Key[4:], // cut contract ID as it is done in C#
Value: kv.Value,
}
}
return res, nil
}
// getStateRootFromParam retrieves state root hash from the provided parameter
// (only util.Uint256 serialized representation is allowed) and checks whether
// MPT states are supported for the old stateroot.
func (s *Server) getStateRootFromParam(p *params.Param) (util.Uint256, *neorpc.Error) {
root, err := p.GetUint256()
if err != nil {
return util.Uint256{}, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, "invalid stateroot")
}
if s.chain.GetConfig().Ledger.KeepOnlyLatestState {
curr, err := s.chain.GetStateModule().GetStateRoot(s.chain.BlockHeight())
if err != nil {
return util.Uint256{}, neorpc.NewInternalServerError(fmt.Sprintf("failed to get current stateroot: %s", err))
}
if !curr.Root.Equals(root) {
return util.Uint256{}, neorpc.WrapErrorWithData(neorpc.ErrUnsupportedState, fmt.Sprintf("state-based methods are not supported for old states: %s", errKeepOnlyLatestState))
}
}
return root, nil
}
func (s *Server) findStorage(reqParams params.Params) (any, *neorpc.Error) {
id, prefix, start, take, respErr := s.getFindStorageParams(reqParams)
if respErr != nil {
return nil, respErr
}
return s.findStorageInternal(id, prefix, start, take, s.chain)
}
func (s *Server) findStorageInternal(id int32, prefix []byte, start, take int, seeker ContractStorageSeeker) (any, *neorpc.Error) {
var (
i int
end = start + take
// Result is an empty list if a contract state is not found as it is in C# implementation.
res = &result.FindStorage{Results: make([]result.KeyValue, 0)}
)
seeker.SeekStorage(id, prefix, func(k, v []byte) bool {
if i < start {
i++
return true
}
if i < end {
res.Results = append(res.Results, result.KeyValue{
Key: bytes.Clone(append(prefix, k...)), // Don't strip prefix, as it is done in C#.
Value: v,
})
i++
return true
}
res.Truncated = true
return false
})
res.Next = i
return res, nil
}
func (s *Server) findStorageHistoric(reqParams params.Params) (any, *neorpc.Error) {
root, respErr := s.getStateRootFromParam(reqParams.Value(0))
if respErr != nil {
return nil, respErr
}
if len(reqParams) < 2 {
return nil, neorpc.ErrInvalidParams
}
id, prefix, start, take, respErr := s.getFindStorageParams(reqParams[1:], root)
if respErr != nil {
return nil, respErr
}
return s.findStorageInternal(id, prefix, start, take, mptStorageSeeker{
root: root,
module: s.chain.GetStateModule(),
})
}
// mptStorageSeeker is an auxiliary structure that implements ContractStorageSeeker interface.
type mptStorageSeeker struct {
root util.Uint256
module core.StateRoot
}
func (s mptStorageSeeker) SeekStorage(id int32, prefix []byte, cont func(k, v []byte) bool) {
key := makeStorageKey(id, prefix)
s.module.SeekStates(s.root, key, cont)
}
func (s *Server) getFindStorageParams(reqParams params.Params, root ...util.Uint256) (int32, []byte, int, int, *neorpc.Error) {
if len(reqParams) < 2 {
return 0, nil, 0, 0, neorpc.ErrInvalidParams
}
id, respErr := s.contractIDFromParam(reqParams.Value(0), root...)
if respErr != nil {
return 0, nil, 0, 0, respErr
}
prefix, err := reqParams.Value(1).GetBytesBase64()
if err != nil {
return 0, nil, 0, 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid prefix: %s", err))
}
var skip int
if len(reqParams) > 2 {
skip, err = reqParams.Value(2).GetInt()
if err != nil {
return 0, nil, 0, 0, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("invalid start: %s", err))
}
}
return id, prefix, skip, s.config.MaxFindStorageResultItems, nil
}
func (s *Server) getHistoricalContractState(root util.Uint256, csHash util.Uint160) (*state.Contract, *neorpc.Error) {
csKey := makeStorageKey(native.ManagementContractID, native.MakeContractKey(csHash))
csBytes, err := s.chain.GetStateModule().GetState(root, csKey)
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnknownContract, fmt.Sprintf("Failed to get historical contract state: %s", err.Error()))
}
contract := new(state.Contract)
err = stackitem.DeserializeConvertible(csBytes, contract)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to deserialize historical contract state: %s", err))
}
return contract, nil
}
func (s *Server) getStateHeight(_ params.Params) (any, *neorpc.Error) {
var height = s.chain.BlockHeight()
var stateHeight = s.chain.GetStateModule().CurrentValidatedHeight()
if s.chain.GetConfig().StateRootInHeader {
stateHeight = height - 1
}
return &result.StateHeight{
Local: height,
Validated: stateHeight,
}, nil
}
func (s *Server) getStateRoot(ps params.Params) (any, *neorpc.Error) {
p := ps.Value(0)
if p == nil {
return nil, neorpc.NewInvalidParamsError("missing stateroot identifier")
}
var rt *state.MPTRoot
var h util.Uint256
height, err := p.GetIntStrict()
if err == nil {
if err := checkUint32(height); err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
rt, err = s.chain.GetStateModule().GetStateRoot(uint32(height))
} else if h, err = p.GetUint256(); err == nil {
var hdr *block.Header
hdr, err = s.chain.GetHeader(h)
if err == nil {
rt, err = s.chain.GetStateModule().GetStateRoot(hdr.Index)
}
}
if err != nil {
return nil, neorpc.ErrUnknownStateRoot
}
return rt, nil
}
func (s *Server) getStorage(ps params.Params) (any, *neorpc.Error) {
id, rErr := s.contractIDFromParam(ps.Value(0))
if rErr != nil {
return nil, rErr
}
key, err := ps.Value(1).GetBytesBase64()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
item := s.chain.GetStorageItem(id, key)
if item == nil {
return "", neorpc.ErrUnknownStorageItem
}
return []byte(item), nil
}
func (s *Server) getStorageHistoric(ps params.Params) (any, *neorpc.Error) {
root, respErr := s.getStateRootFromParam(ps.Value(0))
if respErr != nil {
return nil, respErr
}
if len(ps) < 2 {
return nil, neorpc.ErrInvalidParams
}
id, rErr := s.contractIDFromParam(ps.Value(1), root)
if rErr != nil {
return nil, rErr
}
key, err := ps.Value(2).GetBytesBase64()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
pKey := makeStorageKey(id, key)
v, err := s.chain.GetStateModule().GetState(root, pKey)
if err != nil && !errors.Is(err, mpt.ErrNotFound) {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to get state item: %s", err))
}
if v == nil {
return "", neorpc.ErrUnknownStorageItem
}
return v, nil
}
func (s *Server) getrawtransaction(reqParams params.Params) (any, *neorpc.Error) {
txHash, err := reqParams.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
tx, height, err := s.chain.GetTransaction(txHash)
if err != nil {
return nil, neorpc.ErrUnknownTransaction
}
if v, _ := reqParams.Value(1).GetBoolean(); v {
res := result.TransactionOutputRaw{
Transaction: *tx,
}
if height == math.MaxUint32 { // Mempooled transaction.
return res, nil
}
_header := s.chain.GetHeaderHash(height)
header, err := s.chain.GetHeader(_header)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Failed to get header for the transaction: %s", err.Error()))
}
aers, err := s.chain.GetAppExecResults(txHash, trigger.Application)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Failed to get application log for the transaction: %s", err.Error()))
}
if len(aers) == 0 {
return nil, neorpc.NewInternalServerError("Inconsistent application log: application log for the transaction is empty")
}
res.TransactionMetadata = result.TransactionMetadata{
Blockhash: header.Hash(),
Confirmations: int(s.chain.BlockHeight() - header.Index + 1),
Timestamp: header.Timestamp,
VMState: aers[0].VMState.String(),
}
return res, nil
}
return tx.Bytes(), nil
}
func (s *Server) getTransactionHeight(ps params.Params) (any, *neorpc.Error) {
h, err := ps.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
_, height, err := s.chain.GetTransaction(h)
if err != nil || height == math.MaxUint32 {
return nil, neorpc.ErrUnknownTransaction
}
return height, nil
}
// getContractState returns contract state (contract information, according to the contract script hash,
// contract id or native contract name).
func (s *Server) getContractState(reqParams params.Params) (any, *neorpc.Error) {
scriptHash, err := s.contractScriptHashFromParam(reqParams.Value(0))
if err != nil {
return nil, err
}
cs := s.chain.GetContractState(scriptHash)
if cs == nil {
return nil, neorpc.ErrUnknownContract
}
return cs, nil
}
func (s *Server) getNativeContracts(_ params.Params) (any, *neorpc.Error) {
return s.chain.GetNatives(), nil
}
// getBlockSysFee returns the system fees of the block, based on the specified index.
func (s *Server) getBlockSysFee(reqParams params.Params) (any, *neorpc.Error) {
num, err := s.blockHeightFromParam(reqParams.Value(0))
if err != nil {
return 0, neorpc.WrapErrorWithData(err, fmt.Sprintf("invalid block height: %s", err.Data))
}
headerHash := s.chain.GetHeaderHash(num)
block, errBlock := s.chain.GetBlock(headerHash)
if errBlock != nil {
return 0, neorpc.ErrUnknownBlock
}
var blockSysFee int64
for _, tx := range block.Transactions {
blockSysFee += tx.SystemFee
}
return blockSysFee, nil
}
// getBlockHeader returns the corresponding block header information according to the specified script hash.
func (s *Server) getBlockHeader(reqParams params.Params) (any, *neorpc.Error) {
param := reqParams.Value(0)
hash, respErr := s.blockHashFromParam(param)
if respErr != nil {
return nil, respErr
}
verbose, _ := reqParams.Value(1).GetBoolean()
h, err := s.chain.GetHeader(hash)
if err != nil {
return nil, neorpc.ErrUnknownBlock
}
if verbose {
res := result.Header{
Header: *h,
BlockMetadata: s.fillBlockMetadata(h, h),
}
return res, nil
}
buf := io.NewBufBinWriter()
h.EncodeBinary(buf.BinWriter)
if buf.Err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("encoding error: %s", buf.Err))
}
return buf.Bytes(), nil
}
// getUnclaimedGas returns unclaimed GAS amount of the specified address.
func (s *Server) getUnclaimedGas(ps params.Params) (any, *neorpc.Error) {
u, err := ps.Value(0).GetUint160FromAddressOrHex()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
neo, _ := s.chain.GetGoverningTokenBalance(u)
if neo.Sign() == 0 {
return result.UnclaimedGas{
Address: u,
}, nil
}
gas, err := s.chain.CalculateClaimable(u, s.chain.BlockHeight()+1) // +1 as in C#, for the next block.
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Can't calculate claimable: %s", err.Error()))
}
return result.UnclaimedGas{
Address: u,
Unclaimed: *gas,
}, nil
}
// getCandidates returns the current list of candidates with their active/inactive voting status.
func (s *Server) getCandidates(_ params.Params) (any, *neorpc.Error) {
var validators keys.PublicKeys
validators, err := s.chain.GetNextBlockValidators()
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Can't get next block validators: %s", err.Error()))
}
enrollments, err := s.chain.GetEnrollments()
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Can't get enrollments: %s", err.Error()))
}
var res = make([]result.Candidate, 0, len(enrollments))
for _, v := range enrollments {
res = append(res, result.Candidate{
PublicKey: *v.Key,
Votes: v.Votes.Int64(),
Active: validators.Contains(v.Key),
})
}
return res, nil
}
// getNextBlockValidators returns validators for the next block with voting status.
func (s *Server) getNextBlockValidators(_ params.Params) (any, *neorpc.Error) {
var validators keys.PublicKeys
validators, err := s.chain.GetNextBlockValidators()
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Can't get next block validators: %s", err.Error()))
}
enrollments, err := s.chain.GetEnrollments()
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("Can't get enrollments: %s", err.Error()))
}
var res = make([]result.Validator, 0, len(validators))
for _, v := range enrollments {
if !validators.Contains(v.Key) {
continue
}
res = append(res, result.Validator{
PublicKey: *v.Key,
Votes: v.Votes.Int64(),
})
}
return res, nil
}
// getCommittee returns the current list of NEO committee members.
func (s *Server) getCommittee(_ params.Params) (any, *neorpc.Error) {
keys, err := s.chain.GetCommittee()
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("can't get committee members: %s", err))
}
return keys, nil
}
// invokeFunction implements the `invokeFunction` RPC call.
func (s *Server) invokeFunction(reqParams params.Params) (any, *neorpc.Error) {
tx, verbose, respErr := s.getInvokeFunctionParams(reqParams)
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, nil, verbose)
}
// invokeFunctionHistoric implements the `invokeFunctionHistoric` RPC call.
func (s *Server) invokeFunctionHistoric(reqParams params.Params) (any, *neorpc.Error) {
nextH, respErr := s.getHistoricParams(reqParams)
if respErr != nil {
return nil, respErr
}
if len(reqParams) < 2 {
return nil, neorpc.ErrInvalidParams
}
tx, verbose, respErr := s.getInvokeFunctionParams(reqParams[1:])
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, &nextH, verbose)
}
func (s *Server) getInvokeFunctionParams(reqParams params.Params) (*transaction.Transaction, bool, *neorpc.Error) {
if len(reqParams) < 2 {
return nil, false, neorpc.ErrInvalidParams
}
scriptHash, responseErr := s.contractScriptHashFromParam(reqParams.Value(0))
if responseErr != nil {
return nil, false, responseErr
}
method, err := reqParams[1].GetString()
if err != nil {
return nil, false, neorpc.ErrInvalidParams
}
var invparams *params.Param
if len(reqParams) > 2 {
invparams = &reqParams[2]
}
tx := &transaction.Transaction{}
if len(reqParams) > 3 {
signers, _, err := reqParams[3].GetSignersWithWitnesses()
if err != nil {
return nil, false, neorpc.ErrInvalidParams
}
tx.Signers = signers
}
var verbose bool
if len(reqParams) > 4 {
verbose, err = reqParams[4].GetBoolean()
if err != nil {
return nil, false, neorpc.ErrInvalidParams
}
}
if len(tx.Signers) == 0 {
tx.Signers = []transaction.Signer{{Account: util.Uint160{}, Scopes: transaction.None}}
}
script, err := params.CreateFunctionInvocationScript(scriptHash, method, invparams)
if err != nil {
return nil, false, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("can't create invocation script: %s", err))
}
tx.Script = script
return tx, verbose, nil
}
// invokescript implements the `invokescript` RPC call.
func (s *Server) invokescript(reqParams params.Params) (any, *neorpc.Error) {
tx, verbose, respErr := s.getInvokeScriptParams(reqParams)
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, nil, verbose)
}
// invokescripthistoric implements the `invokescripthistoric` RPC call.
func (s *Server) invokescripthistoric(reqParams params.Params) (any, *neorpc.Error) {
nextH, respErr := s.getHistoricParams(reqParams)
if respErr != nil {
return nil, respErr
}
if len(reqParams) < 2 {
return nil, neorpc.ErrInvalidParams
}
tx, verbose, respErr := s.getInvokeScriptParams(reqParams[1:])
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, &nextH, verbose)
}
func (s *Server) getInvokeScriptParams(reqParams params.Params) (*transaction.Transaction, bool, *neorpc.Error) {
script, err := reqParams.Value(0).GetBytesBase64()
if err != nil {
return nil, false, neorpc.ErrInvalidParams
}
tx := &transaction.Transaction{}
if len(reqParams) > 1 {
signers, witnesses, err := reqParams[1].GetSignersWithWitnesses()
if err != nil {
return nil, false, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
tx.Signers = signers
tx.Scripts = witnesses
}
var verbose bool
if len(reqParams) > 2 {
verbose, err = reqParams[2].GetBoolean()
if err != nil {
return nil, false, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
}
if len(tx.Signers) == 0 {
tx.Signers = []transaction.Signer{{Account: util.Uint160{}, Scopes: transaction.None}}
}
tx.Script = script
return tx, verbose, nil
}
// invokeContractVerify implements the `invokecontractverify` RPC call.
func (s *Server) invokeContractVerify(reqParams params.Params) (any, *neorpc.Error) {
scriptHash, tx, invocationScript, respErr := s.getInvokeContractVerifyParams(reqParams)
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Verification, invocationScript, scriptHash, tx, nil, false)
}
// invokeContractVerifyHistoric implements the `invokecontractverifyhistoric` RPC call.
func (s *Server) invokeContractVerifyHistoric(reqParams params.Params) (any, *neorpc.Error) {
nextH, respErr := s.getHistoricParams(reqParams)
if respErr != nil {
return nil, respErr
}
if len(reqParams) < 2 {
return nil, neorpc.ErrInvalidParams
}
scriptHash, tx, invocationScript, respErr := s.getInvokeContractVerifyParams(reqParams[1:])
if respErr != nil {
return nil, respErr
}
return s.runScriptInVM(trigger.Verification, invocationScript, scriptHash, tx, &nextH, false)
}
func (s *Server) getInvokeContractVerifyParams(reqParams params.Params) (util.Uint160, *transaction.Transaction, []byte, *neorpc.Error) {
scriptHash, responseErr := s.contractScriptHashFromParam(reqParams.Value(0))
if responseErr != nil {
return util.Uint160{}, nil, nil, responseErr
}
bw := io.NewBufBinWriter()
if len(reqParams) > 1 {
args, err := reqParams[1].GetArray() // second `invokecontractverify` parameter is an array of arguments for `verify` method
if err != nil {
return util.Uint160{}, nil, nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
if len(args) > 0 {
err := params.ExpandArrayIntoScript(bw.BinWriter, args)
if err != nil {
return util.Uint160{}, nil, nil, neorpc.NewInternalServerError(fmt.Sprintf("can't create witness invocation script: %s", err))
}
}
}
invocationScript := bw.Bytes()
tx := &transaction.Transaction{Script: []byte{byte(opcode.RET)}} // need something in script
if len(reqParams) > 2 {
signers, witnesses, err := reqParams[2].GetSignersWithWitnesses()
if err != nil {
return util.Uint160{}, nil, nil, neorpc.ErrInvalidParams
}
tx.Signers = signers
tx.Scripts = witnesses
} else { // fill the only known signer - the contract with `verify` method
tx.Signers = []transaction.Signer{{Account: scriptHash}}
tx.Scripts = []transaction.Witness{{InvocationScript: invocationScript, VerificationScript: []byte{}}}
}
return scriptHash, tx, invocationScript, nil
}
// getHistoricParams checks that historic calls are supported and returns index of
// a fake next block to perform the historic call. It also checks that
// specified stateroot is stored at the specified height for further request
// handling consistency.
func (s *Server) getHistoricParams(reqParams params.Params) (uint32, *neorpc.Error) {
if s.chain.GetConfig().Ledger.KeepOnlyLatestState {
return 0, neorpc.WrapErrorWithData(neorpc.ErrUnsupportedState, fmt.Sprintf("only latest state is supported: %s", errKeepOnlyLatestState))
}
if len(reqParams) < 1 {
return 0, neorpc.ErrInvalidParams
}
height, respErr := s.blockHeightFromParam(reqParams.Value(0))
if respErr != nil {
hash, err := reqParams.Value(0).GetUint256()
if err != nil {
return 0, neorpc.NewInvalidParamsError(fmt.Sprintf("invalid block hash or index or stateroot hash: %s", err))
}
b, err := s.chain.GetBlock(hash)
if err != nil {
stateH, err := s.chain.GetStateModule().GetLatestStateHeight(hash)
if err != nil {
return 0, neorpc.NewInvalidParamsError(fmt.Sprintf("unknown block or stateroot: %s", err))
}
height = stateH
} else {
height = b.Index
}
}
return height + 1, nil
}
func (s *Server) prepareInvocationContext(t trigger.Type, script []byte, contractScriptHash util.Uint160, tx *transaction.Transaction, nextH *uint32, verbose bool) (*interop.Context, *neorpc.Error) {
var (
err error
ic *interop.Context
)
if nextH == nil {
ic, err = s.chain.GetTestVM(t, tx, nil)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to create test VM: %s", err))
}
} else {
ic, err = s.chain.GetTestHistoricVM(t, tx, *nextH)
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to create historic VM: %s", err))
}
}
if verbose {
ic.VM.EnableInvocationTree()
}
ic.VM.GasLimit = int64(s.config.MaxGasInvoke)
if t == trigger.Verification {
// We need this special case because witnesses verification is not the simple System.Contract.Call,
// and we need to define exactly the amount of gas consumed for a contract witness verification.
ic.VM.GasLimit = min(ic.VM.GasLimit, s.chain.GetMaxVerificationGAS())
err = s.chain.InitVerificationContext(ic, contractScriptHash, &transaction.Witness{InvocationScript: script, VerificationScript: []byte{}})
if err != nil {
switch {
case errors.Is(err, core.ErrUnknownVerificationContract):
return nil, neorpc.WrapErrorWithData(neorpc.ErrUnknownContract, err.Error())
case errors.Is(err, core.ErrInvalidVerificationContract):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidVerificationFunction, err.Error())
default:
return nil, neorpc.NewInternalServerError(fmt.Sprintf("can't prepare verification VM: %s", err))
}
}
} else {
ic.VM.LoadScriptWithFlags(script, callflag.All)
}
return ic, nil
}
// runScriptInVM runs the given script in a new test VM and returns the invocation
// result. The script is either a simple script in case of `application` trigger,
// witness invocation script in case of `verification` trigger (it pushes `verify`
// arguments on stack before verification). In case of contract verification
// contractScriptHash should be specified.
func (s *Server) runScriptInVM(t trigger.Type, script []byte, contractScriptHash util.Uint160, tx *transaction.Transaction, nextH *uint32, verbose bool) (*result.Invoke, *neorpc.Error) {
ic, respErr := s.prepareInvocationContext(t, script, contractScriptHash, tx, nextH, verbose)
if respErr != nil {
return nil, respErr
}
err := ic.VM.Run()
var faultException string
if err != nil {
faultException = err.Error()
}
items := ic.VM.Estack().ToArray()
sess := s.postProcessExecStack(items)
var id uuid.UUID
if sess != nil {
// nextH == nil only when we're not using MPT-backed storage, therefore
// the second attempt won't stop here.
if s.config.SessionBackedByMPT && nextH == nil {
ic.Finalize()
// Rerun with MPT-backed storage.
return s.runScriptInVM(t, script, contractScriptHash, tx, &ic.Block.Index, verbose)
}
id = uuid.New()
sessionID := id.String()
sess.finalize = ic.Finalize
sess.timer = time.AfterFunc(time.Second*time.Duration(s.config.SessionExpirationTime), func() {
s.sessionsLock.Lock()
defer s.sessionsLock.Unlock()
if len(s.sessions) == 0 {
return
}
sess, ok := s.sessions[sessionID]
if !ok {
return
}
sess.iteratorsLock.Lock()
sess.finalize()
delete(s.sessions, sessionID)
sess.iteratorsLock.Unlock()
})
s.sessionsLock.Lock()
if len(s.sessions) >= s.config.SessionPoolSize {
ic.Finalize()
s.sessionsLock.Unlock()
return nil, neorpc.NewInternalServerError("max session capacity reached")
}
s.sessions[sessionID] = sess
s.sessionsLock.Unlock()
} else {
ic.Finalize()
}
var diag *result.InvokeDiag
tree := ic.VM.GetInvocationTree()
if tree != nil {
diag = &result.InvokeDiag{
Invocations: tree.Calls,
Changes: storage.BatchToOperations(ic.DAO.GetBatch()),
}
}
notifications := ic.Notifications
if notifications == nil {
notifications = make([]state.NotificationEvent, 0)
}
res := &result.Invoke{
State: ic.VM.State().String(),
GasConsumed: ic.VM.GasConsumed(),
Script: script,
Stack: items,
FaultException: faultException,
Notifications: notifications,
Diagnostics: diag,
Session: id,
}
return res, nil
}
// postProcessExecStack changes iterator interop items according to the server configuration.
// It does modifications in-place, but it returns a session if any iterator was registered.
func (s *Server) postProcessExecStack(stack []stackitem.Item) *session {
var sess session
for i, v := range stack {
var id uuid.UUID
stack[i], id = s.registerOrDumpIterator(v)
if id != (uuid.UUID{}) {
sess.iteratorIdentifiers = append(sess.iteratorIdentifiers, &iteratorIdentifier{
ID: id.String(),
Item: v,
})
}
}
if len(sess.iteratorIdentifiers) != 0 {
return &sess
}
return nil
}
// registerOrDumpIterator changes iterator interop stack items into result.Iterator
// interop stack items and returns a uuid for it if sessions are enabled. All the other stack
// items are not changed.
func (s *Server) registerOrDumpIterator(item stackitem.Item) (stackitem.Item, uuid.UUID) {
var iterID uuid.UUID
if (item.Type() != stackitem.InteropT) || !iterator.IsIterator(item) {
return item, iterID
}
var resIterator result.Iterator
if s.config.SessionEnabled {
iterID = uuid.New()
resIterator.ID = &iterID
} else {
resIterator.Values, resIterator.Truncated = iterator.ValuesTruncated(item, s.config.MaxIteratorResultItems)
}
return stackitem.NewInterop(resIterator), iterID
}
func (s *Server) traverseIterator(reqParams params.Params) (any, *neorpc.Error) {
if !s.config.SessionEnabled {
return nil, neorpc.ErrSessionsDisabled
}
sID, err := reqParams.Value(0).GetUUID()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("invalid session ID: %s", err))
}
iID, err := reqParams.Value(1).GetUUID()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("invalid iterator ID: %s", err))
}
count, err := reqParams.Value(2).GetInt()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("invalid iterator items count: %s", err))
}
if err := checkInt32(count); err != nil {
return nil, neorpc.NewInvalidParamsError("invalid iterator items count: not an int32")
}
if count > s.config.MaxIteratorResultItems {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("iterator items count (%d) is out of range (%d at max)", count, s.config.MaxIteratorResultItems))
}
s.sessionsLock.Lock()
session, ok := s.sessions[sID.String()]
if !ok {
s.sessionsLock.Unlock()
return nil, neorpc.ErrUnknownSession
}
session.iteratorsLock.Lock()
// Perform `till` update only after session.iteratorsLock is taken in order to have more
// precise session lifetime.
session.timer.Reset(time.Second * time.Duration(s.config.SessionExpirationTime))
s.sessionsLock.Unlock()
var (
iIDStr = iID.String()
iVals []stackitem.Item
found bool
)
for _, it := range session.iteratorIdentifiers {
if iIDStr == it.ID {
iVals = iterator.Values(it.Item, count)
found = true
break
}
}
session.iteratorsLock.Unlock()
if !found {
return nil, neorpc.ErrUnknownIterator
}
result := make([]json.RawMessage, len(iVals))
for j := range iVals {
result[j], err = stackitem.ToJSONWithTypes(iVals[j])
if err != nil {
return nil, neorpc.NewInternalServerError(fmt.Sprintf("failed to marshal iterator value: %s", err))
}
}
return result, nil
}
func (s *Server) terminateSession(reqParams params.Params) (any, *neorpc.Error) {
if !s.config.SessionEnabled {
return nil, neorpc.ErrSessionsDisabled
}
sID, err := reqParams.Value(0).GetUUID()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("invalid session ID: %s", err))
}
strSID := sID.String()
s.sessionsLock.Lock()
defer s.sessionsLock.Unlock()
session, ok := s.sessions[strSID]
if !ok {
return nil, neorpc.ErrUnknownSession
}
// Iterators access Seek channel under the hood; finalizer closes this channel, thus,
// we need to perform finalisation under iteratorsLock.
session.iteratorsLock.Lock()
session.finalize()
if !session.timer.Stop() {
<-session.timer.C
}
delete(s.sessions, strSID)
session.iteratorsLock.Unlock()
return ok, nil
}
// submitBlock broadcasts a raw block over the Neo network.
func (s *Server) submitBlock(reqParams params.Params) (any, *neorpc.Error) {
blockBytes, err := reqParams.Value(0).GetBytesBase64()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("missing parameter or not a base64: %s", err))
}
b := block.New(s.stateRootEnabled)
r := io.NewBinReaderFromBuf(blockBytes)
b.DecodeBinary(r)
if r.Err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("can't decode block: %s", r.Err))
}
return getRelayResult(s.chain.AddBlock(b), b.Hash())
}
// submitNotaryRequest broadcasts P2PNotaryRequest over the Neo network.
func (s *Server) submitNotaryRequest(ps params.Params) (any, *neorpc.Error) {
if !s.chain.P2PSigExtensionsEnabled() {
return nil, neorpc.NewInternalServerError("P2PSignatureExtensions are disabled")
}
bytePayload, err := ps.Value(0).GetBytesBase64()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("not a base64: %s", err))
}
r, err := payload.NewP2PNotaryRequestFromBytes(bytePayload)
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("can't decode notary payload: %s", err))
}
return getRelayResult(s.coreServer.RelayP2PNotaryRequest(r), r.FallbackTransaction.Hash())
}
// getRelayResult returns successful relay result or an error.
func getRelayResult(err error, hash util.Uint256) (any, *neorpc.Error) {
switch {
case err == nil:
return result.RelayResult{
Hash: hash,
}, nil
case errors.Is(err, core.ErrTxExpired):
return nil, neorpc.WrapErrorWithData(neorpc.ErrExpiredTransaction, err.Error())
case errors.Is(err, core.ErrAlreadyExists) || errors.Is(err, core.ErrInvalidBlockIndex):
return nil, neorpc.WrapErrorWithData(neorpc.ErrAlreadyExists, err.Error())
case errors.Is(err, core.ErrAlreadyInPool):
return nil, neorpc.WrapErrorWithData(neorpc.ErrAlreadyInPool, err.Error())
case errors.Is(err, core.ErrOOM):
return nil, neorpc.WrapErrorWithData(neorpc.ErrMempoolCapReached, err.Error())
case errors.Is(err, core.ErrPolicy):
return nil, neorpc.WrapErrorWithData(neorpc.ErrPolicyFailed, err.Error())
case errors.Is(err, core.ErrInvalidScript):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidScript, err.Error())
case errors.Is(err, core.ErrTxTooBig):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidSize, err.Error())
case errors.Is(err, core.ErrTxSmallNetworkFee):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInsufficientNetworkFee, err.Error())
case errors.Is(err, core.ErrInvalidAttribute):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidAttribute, err.Error())
case errors.Is(err, core.ErrInsufficientFunds), errors.Is(err, core.ErrMemPoolConflict):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInsufficientFunds, err.Error())
case errors.Is(err, core.ErrInvalidSignature):
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidSignature, err.Error())
default:
return nil, neorpc.WrapErrorWithData(neorpc.ErrVerificationFailed, err.Error())
}
}
func (s *Server) submitOracleResponse(ps params.Params) (any, *neorpc.Error) {
oraclePtr := s.oracle.Load()
if oraclePtr == nil {
return nil, neorpc.ErrOracleDisabled
}
oracle := oraclePtr.(OracleHandler)
var pub *keys.PublicKey
pubBytes, err := ps.Value(0).GetBytesBase64()
if err == nil {
pub, err = keys.NewPublicKeyFromBytes(pubBytes, elliptic.P256())
}
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("public key is missing: %s", err))
}
reqID, err := ps.Value(1).GetInt()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("request ID is missing: %s", err))
}
txSig, err := ps.Value(2).GetBytesBase64()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("tx signature is missing: %s", err))
}
msgSig, err := ps.Value(3).GetBytesBase64()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, fmt.Sprintf("msg signature is missing: %s", err))
}
data := broadcaster.GetMessage(pubBytes, uint64(reqID), txSig)
if !pub.Verify(msgSig, hash.Sha256(data).BytesBE()) {
return nil, neorpc.ErrInvalidSignature
}
oracle.AddResponse(pub, uint64(reqID), txSig)
return json.RawMessage([]byte("{}")), nil
}
func (s *Server) sendrawtransaction(reqParams params.Params) (any, *neorpc.Error) {
if len(reqParams) < 1 {
return nil, neorpc.NewInvalidParamsError("not enough parameters")
}
byteTx, err := reqParams[0].GetBytesBase64()
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("not a base64: %s", err))
}
tx, err := transaction.NewTransactionFromBytes(byteTx)
if err != nil {
return nil, neorpc.NewInvalidParamsError(fmt.Sprintf("can't decode transaction: %s", err))
}
return getRelayResult(s.coreServer.RelayTxn(tx), tx.Hash())
}
// subscribe handles subscription requests from websocket clients.
func (s *Server) subscribe(reqParams params.Params, sub *subscriber) (any, *neorpc.Error) {
streamName, err := reqParams.Value(0).GetString()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
event, err := neorpc.GetEventIDFromString(streamName)
if err != nil || event == neorpc.MissedEventID {
return nil, neorpc.ErrInvalidParams
}
if event == neorpc.NotaryRequestEventID && !s.chain.P2PSigExtensionsEnabled() {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, "P2PSigExtensions are disabled")
}
// Optional filter.
var filter neorpc.SubscriptionFilter
if p := reqParams.Value(1); p != nil {
param := *p
jd := json.NewDecoder(bytes.NewReader(param.RawMessage))
jd.DisallowUnknownFields()
switch event {
case neorpc.BlockEventID, neorpc.HeaderOfAddedBlockEventID:
flt := new(neorpc.BlockFilter)
err = jd.Decode(flt)
filter = *flt
case neorpc.TransactionEventID:
flt := new(neorpc.TxFilter)
err = jd.Decode(flt)
filter = *flt
case neorpc.NotaryRequestEventID:
flt := new(neorpc.NotaryRequestFilter)
err = jd.Decode(flt)
filter = *flt
case neorpc.NotificationEventID:
flt := new(neorpc.NotificationFilter)
err = jd.Decode(flt)
filter = *flt
case neorpc.ExecutionEventID:
flt := new(neorpc.ExecutionFilter)
err = jd.Decode(flt)
filter = *flt
}
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
}
if filter != nil {
err = filter.IsValid()
if err != nil {
return nil, neorpc.WrapErrorWithData(neorpc.ErrInvalidParams, err.Error())
}
}
s.subsLock.Lock()
var id int
for ; id < len(sub.feeds); id++ {
if sub.feeds[id].event == neorpc.InvalidEventID {
break
}
}
if id == len(sub.feeds) {
s.subsLock.Unlock()
return nil, neorpc.NewInternalServerError("maximum number of subscriptions is reached")
}
sub.feeds[id].event = event
sub.feeds[id].filter = filter
s.subsLock.Unlock()
s.subsCounterLock.Lock()
select {
case <-s.shutdown:
s.subsCounterLock.Unlock()
return nil, neorpc.NewInternalServerError("server is shutting down")
default:
}
s.subscribeToChannel(event)
s.subsCounterLock.Unlock()
return strconv.FormatInt(int64(id), 10), nil
}
// subscribeToChannel subscribes RPC server to appropriate chain events if
// it's not yet subscribed for them. It's supposed to be called with s.subsCounterLock
// taken by the caller.
func (s *Server) subscribeToChannel(event neorpc.EventID) {
switch event {
case neorpc.BlockEventID:
if s.blockSubs == 0 {
s.chain.SubscribeForBlocks(s.blockCh)
}
s.blockSubs++
case neorpc.TransactionEventID:
if s.transactionSubs == 0 {
s.chain.SubscribeForTransactions(s.transactionCh)
}
s.transactionSubs++
case neorpc.NotificationEventID:
if s.notificationSubs == 0 {
s.chain.SubscribeForNotifications(s.notificationCh)
}
s.notificationSubs++
case neorpc.ExecutionEventID:
if s.executionSubs == 0 {
s.chain.SubscribeForExecutions(s.executionCh)
}
s.executionSubs++
case neorpc.NotaryRequestEventID:
if s.notaryRequestSubs == 0 {
s.coreServer.SubscribeForNotaryRequests(s.notaryRequestCh)
}
s.notaryRequestSubs++
case neorpc.HeaderOfAddedBlockEventID:
if s.blockHeaderSubs == 0 {
s.chain.SubscribeForHeadersOfAddedBlocks(s.blockHeaderCh)
}
s.blockHeaderSubs++
}
}
// unsubscribe handles unsubscription requests from websocket clients.
func (s *Server) unsubscribe(reqParams params.Params, sub *subscriber) (any, *neorpc.Error) {
id, err := reqParams.Value(0).GetInt()
if err != nil || id < 0 {
return nil, neorpc.ErrInvalidParams
}
s.subsLock.Lock()
if len(sub.feeds) <= id || sub.feeds[id].event == neorpc.InvalidEventID {
s.subsLock.Unlock()
return nil, neorpc.ErrInvalidParams
}
event := sub.feeds[id].event
sub.feeds[id].event = neorpc.InvalidEventID
sub.feeds[id].filter = nil
s.subsLock.Unlock()
s.subsCounterLock.Lock()
s.unsubscribeFromChannel(event)
s.subsCounterLock.Unlock()
return true, nil
}
// unsubscribeFromChannel unsubscribes RPC server from appropriate chain events
// if there are no other subscribers for it. It must be called with s.subsConutersLock
// holding by the caller.
func (s *Server) unsubscribeFromChannel(event neorpc.EventID) {
switch event {
case neorpc.BlockEventID:
s.blockSubs--
if s.blockSubs == 0 {
s.chain.UnsubscribeFromBlocks(s.blockCh)
}
case neorpc.TransactionEventID:
s.transactionSubs--
if s.transactionSubs == 0 {
s.chain.UnsubscribeFromTransactions(s.transactionCh)
}
case neorpc.NotificationEventID:
s.notificationSubs--
if s.notificationSubs == 0 {
s.chain.UnsubscribeFromNotifications(s.notificationCh)
}
case neorpc.ExecutionEventID:
s.executionSubs--
if s.executionSubs == 0 {
s.chain.UnsubscribeFromExecutions(s.executionCh)
}
case neorpc.NotaryRequestEventID:
s.notaryRequestSubs--
if s.notaryRequestSubs == 0 {
s.coreServer.UnsubscribeFromNotaryRequests(s.notaryRequestCh)
}
case neorpc.HeaderOfAddedBlockEventID:
s.blockHeaderSubs--
if s.blockHeaderSubs == 0 {
s.chain.UnsubscribeFromHeadersOfAddedBlocks(s.blockHeaderCh)
}
}
}
// handleSubEvents processes Server subscriptions until Shutdown. Upon
// completion signals to subEventCh channel.
func (s *Server) handleSubEvents() {
var overflowEvent = neorpc.Notification{
JSONRPC: neorpc.JSONRPCVersion,
Event: neorpc.MissedEventID,
Payload: make([]any, 0),
}
b, err := json.Marshal(overflowEvent)
if err != nil {
s.log.Error("fatal: failed to marshal overflow event", zap.Error(err))
return
}
overflowMsg, err := websocket.NewPreparedMessage(websocket.TextMessage, b)
if err != nil {
s.log.Error("fatal: failed to prepare overflow message", zap.Error(err))
return
}
chloop:
for {
var resp = neorpc.Notification{
JSONRPC: neorpc.JSONRPCVersion,
Payload: make([]any, 1),
}
var msg *websocket.PreparedMessage
select {
case <-s.shutdown:
break chloop
case b := <-s.blockCh:
resp.Event = neorpc.BlockEventID
resp.Payload[0] = b
case execution := <-s.executionCh:
resp.Event = neorpc.ExecutionEventID
resp.Payload[0] = execution
case notification := <-s.notificationCh:
resp.Event = neorpc.NotificationEventID
resp.Payload[0] = notification
case tx := <-s.transactionCh:
resp.Event = neorpc.TransactionEventID
resp.Payload[0] = tx
case e := <-s.notaryRequestCh:
resp.Event = neorpc.NotaryRequestEventID
resp.Payload[0] = &result.NotaryRequestEvent{
Type: e.Type,
NotaryRequest: e.Data.(*payload.P2PNotaryRequest),
}
case header := <-s.blockHeaderCh:
resp.Event = neorpc.HeaderOfAddedBlockEventID
resp.Payload[0] = header
}
s.subsLock.RLock()
subloop:
for sub := range s.subscribers {
if sub.overflown.Load() {
continue
}
for i := range sub.feeds {
if rpcevent.Matches(sub.feeds[i], &resp) {
if msg == nil {
b, err = json.Marshal(resp)
if err != nil {
s.log.Error("failed to marshal notification",
zap.Error(err),
zap.Stringer("type", resp.Event))
break subloop
}
msg, err = websocket.NewPreparedMessage(websocket.TextMessage, b)
if err != nil {
s.log.Error("failed to prepare notification message",
zap.Error(err),
zap.Stringer("type", resp.Event))
break subloop
}
}
select {
case sub.writer <- intEvent{msg, &resp}:
default:
sub.overflown.Store(true)
// MissedEvent is to be delivered eventually.
go func(sub *subscriber) {
sub.writer <- intEvent{overflowMsg, &overflowEvent}
sub.overflown.Store(false)
}(sub)
}
// The message is sent only once per subscriber.
break
}
}
}
s.subsLock.RUnlock()
}
// It's important to do it with subsCounterLock held because no subscription routine
// should be running concurrently to this one. And even if one is to run
// after unlock, it'll see closed s.shutdown and won't subscribe.
s.subsCounterLock.Lock()
// There might be no subscription in reality, but it's not a problem as
// core.Blockchain allows unsubscribing non-subscribed channels.
s.chain.UnsubscribeFromBlocks(s.blockCh)
s.chain.UnsubscribeFromTransactions(s.transactionCh)
s.chain.UnsubscribeFromNotifications(s.notificationCh)
s.chain.UnsubscribeFromExecutions(s.executionCh)
s.chain.UnsubscribeFromHeadersOfAddedBlocks(s.blockHeaderCh)
if s.chain.P2PSigExtensionsEnabled() {
s.coreServer.UnsubscribeFromNotaryRequests(s.notaryRequestCh)
}
s.subsCounterLock.Unlock()
drainloop:
for {
select {
case <-s.blockCh:
case <-s.executionCh:
case <-s.notificationCh:
case <-s.transactionCh:
case <-s.notaryRequestCh:
case <-s.blockHeaderCh:
default:
break drainloop
}
}
// It's not required closing these, but since they're drained already
// this is safe.
close(s.blockCh)
close(s.transactionCh)
close(s.notificationCh)
close(s.executionCh)
close(s.notaryRequestCh)
close(s.blockHeaderCh)
// notify Shutdown routine
close(s.subEventsToExitCh)
}
func (s *Server) blockHeightFromParam(param *params.Param) (uint32, *neorpc.Error) {
num, err := param.GetInt()
if err != nil {
return 0, neorpc.ErrInvalidParams
}
if num < 0 || int64(num) > int64(s.chain.BlockHeight()) {
return 0, neorpc.WrapErrorWithData(neorpc.ErrUnknownHeight, fmt.Sprintf("param at index %d should be greater than or equal to 0 and less than or equal to current block height, got: %d", 0, num))
}
return uint32(num), nil
}
func (s *Server) packResponse(r *params.In, result any, respErr *neorpc.Error) abstract {
resp := abstract{
Header: neorpc.Header{
JSONRPC: r.JSONRPC,
ID: r.RawID,
},
}
if respErr != nil {
resp.Error = respErr
} else {
resp.Result = result
}
return resp
}
// logRequestError is a request error logger.
func (s *Server) logRequestError(r *params.Request, jsonErr *neorpc.Error) {
logFields := []zap.Field{
zap.Int64("code", jsonErr.Code),
}
if len(jsonErr.Data) != 0 {
logFields = append(logFields, zap.String("cause", jsonErr.Data))
}
if r.In != nil {
logFields = append(logFields, zap.String("method", r.In.Method))
params := params.Params(r.In.RawParams)
logFields = append(logFields, zap.Any("params", params))
}
logText := "Error encountered with rpc request"
switch jsonErr.Code {
case neorpc.InternalServerErrorCode:
s.log.Error(logText, logFields...)
default:
s.log.Info(logText, logFields...)
}
}
// writeHTTPErrorResponse writes an error response to the ResponseWriter.
func (s *Server) writeHTTPErrorResponse(r *params.In, w http.ResponseWriter, jsonErr *neorpc.Error) {
resp := s.packResponse(r, nil, jsonErr)
s.writeHTTPServerResponse(&params.Request{In: r}, w, resp)
}
func setCORSOriginHeaders(h http.Header) {
h.Set("Access-Control-Allow-Origin", "*")
h.Set("Access-Control-Allow-Headers", "Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With")
}
func (s *Server) writeHTTPServerResponse(r *params.Request, w http.ResponseWriter, resp abstractResult) {
// Errors can happen in many places and we can only catch ALL of them here.
resp.RunForErrors(func(jsonErr *neorpc.Error) {
s.logRequestError(r, jsonErr)
})
w.Header().Set("Content-Type", "application/json; charset=utf-8")
if s.config.EnableCORSWorkaround {
setCORSOriginHeaders(w.Header())
}
if r.In != nil {
resp := resp.(abstract)
if resp.Error != nil {
w.WriteHeader(getHTTPCodeForError(resp.Error))
}
}
encoder := json.NewEncoder(w)
err := encoder.Encode(resp)
if err != nil {
switch {
case r.In != nil:
s.log.Error("Error encountered while encoding response",
zap.String("err", err.Error()),
zap.String("method", r.In.Method))
case r.Batch != nil:
s.log.Error("Error encountered while encoding batch response",
zap.String("err", err.Error()))
}
}
}
// 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 any) bool {
if addr, ok := addr.(string); ok {
_, err := address.StringToUint160(addr)
return err == nil
}
return false
}
func escapeForLog(in string) string {
return strings.Map(func(c rune) rune {
if !strconv.IsGraphic(c) {
return -1
}
return c
}, in)
}
// Addresses returns the list of addresses RPC server is listening to in the form of
// address:port.
func (s *Server) Addresses() []string {
res := make([]string, len(s.http))
for i, srv := range s.http {
res[i] = srv.Addr
}
return res
}
func (s *Server) getRawNotaryPool(_ params.Params) (any, *neorpc.Error) {
if !s.chain.P2PSigExtensionsEnabled() {
return nil, neorpc.NewInternalServerError("P2PSignatureExtensions are disabled")
}
nrp := s.coreServer.GetNotaryPool()
res := &result.RawNotaryPool{Hashes: make(map[util.Uint256][]util.Uint256)}
nrp.IterateVerifiedTransactions(func(tx *transaction.Transaction, data any) bool {
if data != nil {
d := data.(*payload.P2PNotaryRequest)
mainHash := d.MainTransaction.Hash()
fallbackHash := d.FallbackTransaction.Hash()
res.Hashes[mainHash] = append(res.Hashes[mainHash], fallbackHash)
}
return true
})
return res, nil
}
func (s *Server) getRawNotaryTransaction(reqParams params.Params) (any, *neorpc.Error) {
if !s.chain.P2PSigExtensionsEnabled() {
return nil, neorpc.NewInternalServerError("P2PSignatureExtensions are disabled")
}
txHash, err := reqParams.Value(0).GetUint256()
if err != nil {
return nil, neorpc.ErrInvalidParams
}
nrp := s.coreServer.GetNotaryPool()
// Try to find fallback transaction.
tx, ok := nrp.TryGetValue(txHash)
if !ok {
// Try to find main transaction.
nrp.IterateVerifiedTransactions(func(t *transaction.Transaction, data any) bool {
if data != nil && data.(*payload.P2PNotaryRequest).MainTransaction.Hash().Equals(txHash) {
tx = data.(*payload.P2PNotaryRequest).MainTransaction
return false
}
return true
})
// The transaction was not found.
if tx == nil {
return nil, neorpc.ErrUnknownTransaction
}
}
if v, _ := reqParams.Value(1).GetBoolean(); v {
return tx, nil
}
return tx.Bytes(), nil
}
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