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core.go
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core.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package api
import (
"context"
"encoding/hex"
"fmt"
"math"
"reflect"
"strings"
"sync"
"sync/atomic"
"time"
"code.vegaprotocol.io/vega/core/events"
"code.vegaprotocol.io/vega/core/evtforward"
"code.vegaprotocol.io/vega/core/metrics"
"code.vegaprotocol.io/vega/core/stats"
"code.vegaprotocol.io/vega/core/vegatime"
"code.vegaprotocol.io/vega/libs/proto"
"code.vegaprotocol.io/vega/libs/subscribers"
"code.vegaprotocol.io/vega/logging"
ptypes "code.vegaprotocol.io/vega/protos/vega"
protoapi "code.vegaprotocol.io/vega/protos/vega/api/v1"
commandspb "code.vegaprotocol.io/vega/protos/vega/commands/v1"
eventspb "code.vegaprotocol.io/vega/protos/vega/events/v1"
"code.vegaprotocol.io/vega/wallet/crypto"
"github.com/cometbft/cometbft/libs/bytes"
tmctypes "github.com/cometbft/cometbft/rpc/core/types"
"github.com/pkg/errors"
"google.golang.org/grpc/codes"
)
var (
ErrInvalidSignature = errors.New("invalid signature")
ErrSubmitTxCommitDisabled = errors.New("broadcast_tx_commit is disabled")
ErrUnknownSubmitTxRequestType = errors.New("invalid broadcast_tx type")
)
type coreService struct {
protoapi.UnimplementedCoreServiceServer
log *logging.Logger
conf Config
blockchain Blockchain
stats *stats.Stats
svcMu sync.RWMutex
evtForwarder EvtForwarder
timesvc TimeService
eventService EventService
subCancels []func()
powParams ProofOfWorkParams
spamEngine SpamEngine
powEngine PowEngine
chainID string
genesisTime time.Time
hasGenesisTimeAndChainID atomic.Bool
mu sync.Mutex
netInfo *tmctypes.ResultNetInfo
netInfoMu sync.RWMutex
}
func (s *coreService) UpdateProtocolServices(
evtforwarder EvtForwarder,
timesvc TimeService,
evtsvc EventService,
powParams ProofOfWorkParams,
) {
s.svcMu.Lock()
defer s.svcMu.Unlock()
// first cancel all subscriptions
for _, f := range s.subCancels {
f()
}
s.evtForwarder = evtforwarder
s.eventService = evtsvc
s.timesvc = timesvc
s.powParams = powParams
}
// no need for a mutex - we only access the config through a value receiver.
func (s *coreService) updateConfig(conf Config) {
s.conf = conf
}
func (s *coreService) LastBlockHeight(
ctx context.Context,
_ *protoapi.LastBlockHeightRequest,
) (*protoapi.LastBlockHeightResponse, error) {
defer metrics.StartAPIRequestAndTimeGRPC("LastBlockHeight")()
if !s.hasGenesisTimeAndChainID.Load() {
if err := s.getGenesisTimeAndChainID(ctx); err != nil {
return nil, fmt.Errorf("failed to intialise chainID: %w", err)
}
}
blockHeight, blockHash := s.powParams.BlockData()
if s.log.IsDebug() {
s.log.Debug("block height requested, returning", logging.Uint64("block-height", blockHeight), logging.String("block hash", blockHash), logging.String("chaindID", s.chainID))
}
if !s.powParams.IsReady() {
return nil, errors.New("Failed to get last block height server is initialising")
}
return &protoapi.LastBlockHeightResponse{
Height: blockHeight,
Hash: blockHash,
SpamPowDifficulty: s.powParams.SpamPoWDifficulty(),
SpamPowHashFunction: s.powParams.SpamPoWHashFunction(),
SpamPowNumberOfPastBlocks: s.powParams.SpamPoWNumberOfPastBlocks(),
SpamPowNumberOfTxPerBlock: s.powParams.SpamPoWNumberOfTxPerBlock(),
SpamPowIncreasingDifficulty: s.powParams.SpamPoWIncreasingDifficulty(),
ChainId: s.chainID,
}, nil
}
// GetVegaTime returns the latest blockchain header timestamp, in UnixNano format.
// Example: "1568025900111222333" corresponds to 2019-09-09T10:45:00.111222333Z.
func (s *coreService) GetVegaTime(ctx context.Context, _ *protoapi.GetVegaTimeRequest) (*protoapi.GetVegaTimeResponse, error) {
defer metrics.StartAPIRequestAndTimeGRPC("GetVegaTime")()
s.svcMu.RLock()
defer s.svcMu.RUnlock()
return &protoapi.GetVegaTimeResponse{
Timestamp: s.timesvc.GetTimeNow().UnixNano(),
}, nil
}
func (s *coreService) SubmitTransaction(ctx context.Context, req *protoapi.SubmitTransactionRequest) (*protoapi.SubmitTransactionResponse, error) {
startTime := time.Now()
defer metrics.APIRequestAndTimeGRPC("SubmitTransaction", startTime)
if req == nil {
return nil, apiError(codes.InvalidArgument, ErrMalformedRequest)
}
txResult, err := s.blockchain.SubmitTransactionSync(ctx, req.Tx)
if err != nil {
return nil, apiError(codes.Internal, err)
}
return &protoapi.SubmitTransactionResponse{
Success: txResult.Code == 0,
Code: txResult.Code,
Data: string(txResult.Data.Bytes()),
Log: txResult.Log,
Height: 0,
TxHash: txResult.Hash.String(),
}, nil
}
func (s *coreService) CheckTransaction(ctx context.Context, req *protoapi.CheckTransactionRequest) (*protoapi.CheckTransactionResponse, error) {
startTime := time.Now()
defer metrics.APIRequestAndTimeGRPC("CheckTransaction", startTime)
if req == nil {
return nil, apiError(codes.InvalidArgument, ErrMalformedRequest)
}
checkResult, err := s.blockchain.CheckTransaction(ctx, req.Tx)
if err != nil {
return nil, apiError(codes.Internal, err)
}
return &protoapi.CheckTransactionResponse{
Code: checkResult.Code,
Data: string(checkResult.Data),
Info: checkResult.Info,
Log: checkResult.Log,
Success: checkResult.IsOK(),
GasWanted: checkResult.GasWanted,
GasUsed: checkResult.GasUsed,
}, nil
}
func (s *coreService) CheckRawTransaction(ctx context.Context, req *protoapi.CheckRawTransactionRequest) (*protoapi.CheckRawTransactionResponse, error) {
startTime := time.Now()
defer metrics.APIRequestAndTimeGRPC("CheckRawTransaction", startTime)
if req == nil {
return nil, apiError(codes.InvalidArgument, ErrMalformedRequest)
}
checkResult, err := s.blockchain.CheckRawTransaction(ctx, req.Tx)
if err != nil {
return nil, apiError(codes.Internal, err)
}
return &protoapi.CheckRawTransactionResponse{
Code: checkResult.Code,
Data: string(checkResult.Data),
Info: checkResult.Info,
Log: checkResult.Log,
Success: checkResult.IsOK(),
GasWanted: checkResult.GasWanted,
GasUsed: checkResult.GasUsed,
}, nil
}
func (s *coreService) PropagateChainEvent(ctx context.Context, req *protoapi.PropagateChainEventRequest) (*protoapi.PropagateChainEventResponse, error) {
if req.Event == nil {
return nil, apiError(codes.InvalidArgument, ErrMalformedRequest)
}
// verify the signature then
err := verifySignature(s.log, req.Event, req.Signature, req.PubKey)
if err != nil {
return nil, apiError(codes.InvalidArgument, fmt.Errorf("not a valid signature: %w", err))
}
evt := commandspb.ChainEvent{}
err = proto.Unmarshal(req.Event, &evt)
if err != nil {
return nil, apiError(codes.InvalidArgument, fmt.Errorf("not a valid chain event: %w", err))
}
ok := true
s.svcMu.RLock()
defer s.svcMu.RUnlock()
err = s.evtForwarder.Forward(ctx, &evt, req.PubKey)
if err != nil && err != evtforward.ErrEvtAlreadyExist {
s.log.Error("unable to forward chain event",
logging.String("pubkey", req.PubKey),
logging.Error(err))
if err == evtforward.ErrPubKeyNotAllowlisted {
return nil, apiError(codes.PermissionDenied, err)
}
return nil, apiError(codes.Internal, err)
}
return &protoapi.PropagateChainEventResponse{
Success: ok,
}, nil
}
func verifySignature(
log *logging.Logger,
message []byte,
sig []byte,
pubKey string,
) error {
validator, err := crypto.NewSignatureAlgorithm(crypto.Ed25519, 1)
if err != nil {
if log != nil {
log.Error("unable to instantiate new algorithm", logging.Error(err))
}
return err
}
pubKeyBytes, err := hex.DecodeString(pubKey)
if err != nil {
if log != nil {
log.Error("unable to decode hexencoded ubkey", logging.Error(err))
}
return err
}
ok, err := validator.Verify(pubKeyBytes, message, sig)
if err != nil {
if log != nil {
log.Error("unable to verify bundle", logging.Error(err))
}
return err
}
if !ok {
return ErrInvalidSignature
}
return nil
}
// Statistics provides various blockchain and Vega statistics, including:
// Blockchain height, backlog length, current time, orders and trades per block, tendermint version
// Vega counts for parties, markets, order actions (amend, cancel, submit), Vega version.
func (s *coreService) Statistics(ctx context.Context, _ *protoapi.StatisticsRequest) (*protoapi.StatisticsResponse, error) {
defer metrics.StartAPIRequestAndTimeGRPC("Statistics")()
// Call tendermint and related services to get information for statistics
// We load read-only internal statistics through each package level statistics structs
s.svcMu.RLock()
epochTime := s.timesvc.GetTimeNow()
s.svcMu.RUnlock()
// Call tendermint via rpc client
var (
backlogLength, numPeers int
gt *time.Time
chainID string
)
backlogLength, numPeers, gt, chainID, err := s.getTendermintStats(ctx)
if err != nil {
// do not return an error, let just eventually log it
s.log.Debug("could not load tendermint stats", logging.Error(err))
}
// If the chain is replaying then genesis time can be nil
genesisTime := ""
if gt != nil {
genesisTime = vegatime.Format(*gt)
}
stats := &protoapi.Statistics{
BlockHeight: s.stats.Blockchain.Height(),
BlockHash: s.stats.Blockchain.Hash(),
BacklogLength: uint64(backlogLength),
TotalPeers: uint64(numPeers),
GenesisTime: genesisTime,
CurrentTime: vegatime.Format(time.Now()),
VegaTime: vegatime.Format(epochTime),
Uptime: vegatime.Format(s.stats.GetUptime()),
TxPerBlock: s.stats.Blockchain.TotalTxLastBatch(),
AverageTxBytes: s.stats.Blockchain.AverageTxSizeBytes(),
AverageOrdersPerBlock: s.stats.Blockchain.AverageOrdersPerBatch(),
TradesPerSecond: s.stats.Blockchain.TradesPerSecond(),
OrdersPerSecond: s.stats.Blockchain.OrdersPerSecond(),
Status: ptypes.ChainStatus_CHAIN_STATUS_CONNECTED,
AppVersionHash: s.stats.GetVersionHash(),
AppVersion: s.stats.GetVersion(),
ChainVersion: s.stats.GetChainVersion(),
TotalAmendOrder: s.stats.Blockchain.TotalAmendOrder(),
TotalCancelOrder: s.stats.Blockchain.TotalCancelOrder(),
TotalCreateOrder: s.stats.Blockchain.TotalCreateOrder(),
TotalOrders: s.stats.Blockchain.TotalOrders(),
TotalTrades: s.stats.Blockchain.TotalTrades(),
BlockDuration: s.stats.Blockchain.BlockDuration(),
EventCount: s.stats.Blockchain.TotalEventsLastBatch(),
EventsPerSecond: s.stats.Blockchain.EventsPerSecond(),
EpochSeq: s.stats.GetEpochSeq(),
EpochStartTime: vegatime.Format(s.stats.GetEpochStartTime()),
EpochExpiryTime: vegatime.Format(s.stats.GetEpochExpireTime()),
ChainId: chainID,
}
return &protoapi.StatisticsResponse{
Statistics: stats,
}, nil
}
func (s *coreService) getTendermintStats(
ctx context.Context,
) (
backlogLength, numPeers int,
genesis *time.Time,
chainID string,
err error,
) {
if s.stats == nil || s.stats.Blockchain == nil {
return 0, 0, nil, "", apiError(codes.Internal, ErrChainNotConnected)
}
const refused = "connection refused"
// Unconfirmed TX count == current transaction backlog length
backlogLength, err = s.blockchain.GetUnconfirmedTxCount(ctx)
if err != nil {
if strings.Contains(err.Error(), refused) {
return 0, 0, nil, "", nil
}
return 0, 0, nil, "", apiError(codes.Internal, ErrBlockchainBacklogLength, err)
}
if !s.hasGenesisTimeAndChainID.Load() {
if err = s.getGenesisTimeAndChainID(ctx); err != nil {
return 0, 0, nil, "", err
}
}
// Net info provides peer stats etc (block chain network info) == number of peers
netInfo, err := s.getTMNetInfo(ctx)
if err != nil {
return backlogLength, 0, &s.genesisTime, s.chainID, nil // nolint
}
return backlogLength, netInfo.NPeers, &s.genesisTime, s.chainID, nil
}
func (s *coreService) getTMNetInfo(_ context.Context) (tmctypes.ResultNetInfo, error) {
s.netInfoMu.RLock()
defer s.netInfoMu.RUnlock()
if s.netInfo == nil {
return tmctypes.ResultNetInfo{}, apiError(codes.Internal, ErrBlockchainNetworkInfo)
}
return *s.netInfo, nil
}
func (s *coreService) updateNetInfo(ctx context.Context) {
// update the net info every 1 minutes
ticker := time.NewTicker(1 * time.Minute)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
netInfo, err := s.blockchain.GetNetworkInfo(ctx)
if err != nil {
continue
}
s.netInfoMu.Lock()
s.netInfo = netInfo
s.netInfoMu.Unlock()
}
}
}
func (s *coreService) getGenesisTimeAndChainID(ctx context.Context) error {
const refused = "connection refused"
// just lock in here, ideally we'll come here only once, so not a big issue to lock
s.mu.Lock()
defer s.mu.Unlock()
var err error
// Genesis retrieves the current genesis date/time for the blockchain
s.genesisTime, err = s.blockchain.GetGenesisTime(ctx)
if err != nil {
if strings.Contains(err.Error(), refused) {
return nil
}
return apiError(codes.Internal, ErrBlockchainGenesisTime, err)
}
s.chainID, err = s.blockchain.GetChainID(ctx)
if err != nil {
return apiError(codes.Internal, ErrBlockchainChainID, err)
}
s.hasGenesisTimeAndChainID.Store(true)
return nil
}
func (s *coreService) ObserveEventBus(
stream protoapi.CoreService_ObserveEventBusServer,
) error {
defer metrics.StartAPIRequestAndTimeGRPC("ObserveEventBus")()
ctx, cfunc := context.WithCancel(stream.Context())
defer cfunc()
// now we start listening for a few seconds in order to get at least the very first message
// this will be blocking until the connection by the client is closed
// and we will not start processing any events until we receive the original request
// indicating filters and batch size.
req, err := s.recvEventRequest(stream)
if err != nil {
// client exited, nothing to do
return nil // nolint
}
// now we will aggregate filter out of the initial request
types, err := events.ProtoToInternal(req.Type...)
if err != nil {
return apiError(codes.InvalidArgument, ErrMalformedRequest, err)
}
filters := []subscribers.EventFilter{}
if len(req.MarketId) > 0 && len(req.PartyId) > 0 {
filters = append(filters, events.GetPartyAndMarketFilter(req.MarketId, req.PartyId))
} else {
if len(req.MarketId) > 0 {
filters = append(filters, events.GetMarketIDFilter(req.MarketId))
}
if len(req.PartyId) > 0 {
filters = append(filters, events.GetPartyIDFilter(req.PartyId))
}
}
// here we add the cancel to the list of observer
// so if a protocol upgrade happen we can stop processing those
// and nicely do the upgrade
s.svcMu.Lock()
s.subCancels = append(s.subCancels, cfunc)
s.svcMu.Unlock()
// number of retries to -1 to have pretty much unlimited retries
ch, bCh := s.eventService.ObserveEvents(ctx, s.conf.StreamRetries, types, int(req.BatchSize), filters...)
defer close(bCh)
if req.BatchSize > 0 {
err := s.observeEventsWithAck(ctx, stream, req.BatchSize, ch, bCh)
return err
}
err = s.observeEvents(ctx, stream, ch)
return err
}
func (s *coreService) observeEvents(
ctx context.Context,
stream protoapi.CoreService_ObserveEventBusServer,
ch <-chan []*eventspb.BusEvent,
) error {
for {
select {
case data, ok := <-ch:
if !ok {
return nil
}
resp := &protoapi.ObserveEventBusResponse{
Events: data,
}
if err := stream.Send(resp); err != nil {
s.log.Error("Error sending event on stream", logging.Error(err))
return apiError(codes.Internal, ErrStreamInternal, err)
}
case <-ctx.Done():
return apiError(codes.Internal, ErrStreamInternal, ctx.Err())
}
}
}
func (s *coreService) recvEventRequest(
stream protoapi.CoreService_ObserveEventBusServer,
) (*protoapi.ObserveEventBusRequest, error) {
readCtx, cfunc := context.WithTimeout(stream.Context(), 5*time.Second)
oebCh := make(chan protoapi.ObserveEventBusRequest)
var err error
go func() {
defer close(oebCh)
nb := protoapi.ObserveEventBusRequest{}
if err = stream.RecvMsg(&nb); err != nil {
cfunc()
return
}
oebCh <- nb
}()
select {
case <-readCtx.Done():
if err != nil {
// this means the client disconnected
return nil, err
}
// this mean we timedout
return nil, readCtx.Err()
case nb := <-oebCh:
return &nb, nil
}
}
func (s *coreService) observeEventsWithAck(
ctx context.Context,
stream protoapi.CoreService_ObserveEventBusServer,
batchSize int64,
ch <-chan []*eventspb.BusEvent,
bCh chan<- int,
) error {
for {
select {
case data, ok := <-ch:
if !ok {
return nil
}
resp := &protoapi.ObserveEventBusResponse{
Events: data,
}
if err := stream.Send(resp); err != nil {
s.log.Error("Error sending event on stream", logging.Error(err))
return apiError(codes.Internal, ErrStreamInternal, err)
}
case <-ctx.Done():
return apiError(codes.Internal, ErrStreamInternal, ctx.Err())
}
// now we try to read again the new size / ack
req, err := s.recvEventRequest(stream)
if err != nil {
return err
}
if req.BatchSize != batchSize {
batchSize = req.BatchSize
bCh <- int(batchSize)
}
}
}
func (s *coreService) handleSubmitRawTxTMError(err error) error {
// This is Tendermint's specific error signature
if _, ok := err.(interface {
Code() uint32
Details() string
Error() string
}); ok {
s.log.Debug("unable to submit raw transaction", logging.Error(err))
return apiError(codes.InvalidArgument, err)
}
s.log.Debug("unable to submit raw transaction", logging.Error(err))
return apiError(codes.Internal, err)
}
func setResponseBasisContent(response *protoapi.SubmitRawTransactionResponse, code uint32, log string, data, hash bytes.HexBytes) {
response.TxHash = hash.String()
response.Code = code
response.Data = data.String()
response.Log = log
}
func (s *coreService) SubmitRawTransaction(ctx context.Context, req *protoapi.SubmitRawTransactionRequest) (*protoapi.SubmitRawTransactionResponse, error) {
startTime := time.Now()
defer metrics.APIRequestAndTimeGRPC("SubmitTransaction", startTime)
if req == nil {
return nil, apiError(codes.InvalidArgument, ErrMalformedRequest)
}
successResponse := &protoapi.SubmitRawTransactionResponse{Success: true}
switch req.Type {
case protoapi.SubmitRawTransactionRequest_TYPE_ASYNC:
txResult, err := s.blockchain.SubmitRawTransactionAsync(ctx, req.Tx)
if err != nil {
if txResult != nil {
return &protoapi.SubmitRawTransactionResponse{
Success: false,
Code: txResult.Code,
Data: txResult.Data.String(),
Log: txResult.Log,
}, s.handleSubmitRawTxTMError(err)
}
return nil, s.handleSubmitRawTxTMError(err)
}
setResponseBasisContent(successResponse, txResult.Code, txResult.Log, txResult.Data, txResult.Hash)
case protoapi.SubmitRawTransactionRequest_TYPE_SYNC:
txResult, err := s.blockchain.SubmitRawTransactionSync(ctx, req.Tx)
if err != nil {
if txResult != nil {
return &protoapi.SubmitRawTransactionResponse{
Success: false,
Code: txResult.Code,
Data: txResult.Data.String(),
Log: txResult.Log,
}, s.handleSubmitRawTxTMError(err)
}
return nil, s.handleSubmitRawTxTMError(err)
}
setResponseBasisContent(successResponse, txResult.Code, txResult.Log, txResult.Data, txResult.Hash)
case protoapi.SubmitRawTransactionRequest_TYPE_COMMIT:
txResult, err := s.blockchain.SubmitRawTransactionCommit(ctx, req.Tx)
if err != nil {
if txResult != nil {
return &protoapi.SubmitRawTransactionResponse{
Success: false,
Code: txResult.TxResult.Code,
Data: string(txResult.TxResult.Data),
Log: txResult.TxResult.Log,
}, s.handleSubmitRawTxTMError(err)
}
return nil, s.handleSubmitRawTxTMError(err)
}
setResponseBasisContent(successResponse, txResult.TxResult.Code, txResult.TxResult.Log, txResult.TxResult.Data, txResult.Hash)
successResponse.Height = txResult.Height
default:
return nil, apiError(codes.InvalidArgument, errors.New("Invalid TX Type"))
}
return successResponse, nil
}
func (s *coreService) GetSpamStatistics(ctx context.Context, req *protoapi.GetSpamStatisticsRequest) (*protoapi.GetSpamStatisticsResponse, error) {
if req.PartyId == "" {
return nil, apiError(codes.InvalidArgument, ErrEmptyMissingPartyID)
}
if !s.hasGenesisTimeAndChainID.Load() {
if err := s.getGenesisTimeAndChainID(ctx); err != nil {
return nil, fmt.Errorf("failed to intialise chainID: %w", err)
}
}
spamStats := &protoapi.SpamStatistics{}
// Spam engine is not set when NullBlockChain is used
if s.spamEngine != nil && !reflect.ValueOf(s.spamEngine).IsNil() {
spamStats = s.spamEngine.GetSpamStatistics(req.PartyId)
} else {
defaultStats := &protoapi.SpamStatistic{
MaxForEpoch: math.MaxUint64,
MinTokensRequired: "0",
}
spamStats.Delegations = defaultStats
spamStats.NodeAnnouncements = defaultStats
spamStats.Proposals = defaultStats
spamStats.IssueSignatures = defaultStats
spamStats.Transfers = defaultStats
spamStats.CreateReferralSet = defaultStats
spamStats.UpdateReferralSet = defaultStats
spamStats.ApplyReferralCode = defaultStats
spamStats.Votes = &protoapi.VoteSpamStatistics{
Statistics: []*protoapi.VoteSpamStatistic{},
MaxForEpoch: math.MaxUint64,
}
}
// Noop PoW Engine is used for NullBlockChain so this should be safe
spamStats.Pow = s.powEngine.GetSpamStatistics(req.PartyId)
spamStats.EpochSeq = s.stats.GetEpochSeq()
resp := &protoapi.GetSpamStatisticsResponse{
ChainId: s.chainID,
Statistics: spamStats,
}
return resp, nil
}