646 lines
20 KiB
Go
646 lines
20 KiB
Go
package solana
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import (
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"context"
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"errors"
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"fmt"
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"sync"
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"time"
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"github.com/certusone/wormhole/node/pkg/common"
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"github.com/certusone/wormhole/node/pkg/p2p"
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gossipv1 "github.com/certusone/wormhole/node/pkg/proto/gossip/v1"
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"github.com/certusone/wormhole/node/pkg/readiness"
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"github.com/certusone/wormhole/node/pkg/supervisor"
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eth_common "github.com/ethereum/go-ethereum/common"
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"github.com/gagliardetto/solana-go"
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"github.com/gagliardetto/solana-go/rpc"
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"github.com/gagliardetto/solana-go/rpc/jsonrpc"
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"github.com/mr-tron/base58"
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"github.com/near/borsh-go"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/wormhole-foundation/wormhole/sdk/vaa"
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"go.uber.org/zap"
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)
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type SolanaWatcher struct {
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contract solana.PublicKey
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rpcUrl string
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commitment rpc.CommitmentType
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messageEvent chan *common.MessagePublication
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obsvReqC chan *gossipv1.ObservationRequest
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rpcClient *rpc.Client
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// Readiness component
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readiness readiness.Component
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// VAA ChainID of the network we're connecting to.
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chainID vaa.ChainID
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// Human readable name of network
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networkName string
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// The last slot processed by the watcher.
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lastSlot uint64
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// latestFinalizedBlockNumber is the latest block processed by this watcher.
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latestBlockNumber uint64
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latestBlockNumberMu sync.Mutex
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}
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var (
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solanaConnectionErrors = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "wormhole_solana_connection_errors_total",
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Help: "Total number of Solana connection errors",
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}, []string{"solana_network", "commitment", "reason"})
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solanaAccountSkips = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "wormhole_solana_account_updates_skipped_total",
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Help: "Total number of account updates skipped due to invalid data",
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}, []string{"solana_network", "reason"})
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solanaMessagesConfirmed = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "wormhole_solana_observations_confirmed_total",
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Help: "Total number of verified Solana observations found",
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}, []string{"solana_network"})
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currentSolanaHeight = promauto.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "wormhole_solana_current_height",
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Help: "Current Solana slot height",
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}, []string{"solana_network", "commitment"})
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queryLatency = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "wormhole_solana_query_latency",
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Help: "Latency histogram for Solana RPC calls",
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}, []string{"solana_network", "operation", "commitment"})
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)
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const rpcTimeout = time.Second * 5
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// Maximum retries for Solana fetching
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const maxRetries = 10
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const retryDelay = 5 * time.Second
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type ConsistencyLevel uint8
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// Mappings from consistency levels constants to commitment level.
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const (
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consistencyLevelConfirmed ConsistencyLevel = 0
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consistencyLevelFinalized ConsistencyLevel = 1
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)
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func (c ConsistencyLevel) Commitment() (rpc.CommitmentType, error) {
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switch c {
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case consistencyLevelConfirmed:
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return rpc.CommitmentConfirmed, nil
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case consistencyLevelFinalized:
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return rpc.CommitmentFinalized, nil
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default:
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return "", fmt.Errorf("unsupported consistency level: %d", c)
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}
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}
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const (
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postMessageInstructionNumAccounts = 9
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postMessageInstructionID = 0x01
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postMessageUnreliableInstructionID = 0x08
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accountPrefixReliable = "msg"
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accountPrefixUnreliable = "msu"
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)
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// PostMessageData represents the user-supplied, untrusted instruction data
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// for message publications. We use this to determine consistency level before fetching accounts.
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type PostMessageData struct {
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Nonce uint32
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Payload []byte
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ConsistencyLevel ConsistencyLevel
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}
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func NewSolanaWatcher(
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rpcUrl string,
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contractAddress solana.PublicKey,
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messageEvents chan *common.MessagePublication,
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obsvReqC chan *gossipv1.ObservationRequest,
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commitment rpc.CommitmentType,
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readiness readiness.Component,
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chainID vaa.ChainID) *SolanaWatcher {
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return &SolanaWatcher{
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rpcUrl: rpcUrl,
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contract: contractAddress,
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messageEvent: messageEvents,
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obsvReqC: obsvReqC,
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commitment: commitment,
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rpcClient: rpc.New(rpcUrl),
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readiness: readiness,
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chainID: chainID,
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networkName: vaa.ChainID(chainID).String(),
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}
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}
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func (s *SolanaWatcher) Run(ctx context.Context) error {
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// Initialize gossip metrics (we want to broadcast the address even if we're not yet syncing)
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contractAddr := base58.Encode(s.contract[:])
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p2p.DefaultRegistry.SetNetworkStats(s.chainID, &gossipv1.Heartbeat_Network{
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ContractAddress: contractAddr,
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})
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logger := supervisor.Logger(ctx)
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errC := make(chan error)
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go func() {
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timer := time.NewTicker(time.Second * 1)
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defer timer.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case m := <-s.obsvReqC:
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if m.ChainId != uint32(s.chainID) {
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panic("unexpected chain id")
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}
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acc := solana.PublicKeyFromBytes(m.TxHash)
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logger.Info("received observation request", zap.String("account", acc.String()))
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rCtx, cancel := context.WithTimeout(ctx, rpcTimeout)
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s.fetchMessageAccount(rCtx, logger, acc, 0)
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cancel()
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case <-timer.C:
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// Get current slot height
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rCtx, cancel := context.WithTimeout(ctx, rpcTimeout)
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start := time.Now()
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slot, err := s.rpcClient.GetSlot(rCtx, s.commitment)
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cancel()
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queryLatency.WithLabelValues(s.networkName, "get_slot", string(s.commitment)).Observe(time.Since(start).Seconds())
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
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solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "get_slot_error").Inc()
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errC <- err
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return
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}
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lastSlot := s.lastSlot
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if lastSlot == 0 {
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lastSlot = slot - 1
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}
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currentSolanaHeight.WithLabelValues(s.networkName, string(s.commitment)).Set(float64(slot))
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readiness.SetReady(s.readiness)
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p2p.DefaultRegistry.SetNetworkStats(s.chainID, &gossipv1.Heartbeat_Network{
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Height: int64(slot),
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ContractAddress: contractAddr,
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})
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rangeStart := lastSlot + 1
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rangeEnd := slot
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logger.Debug("fetched current Solana height",
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zap.String("commitment", string(s.commitment)),
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zap.Uint64("slot", slot),
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zap.Uint64("lastSlot", lastSlot),
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zap.Uint64("pendingSlots", slot-lastSlot),
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zap.Uint64("from", rangeStart), zap.Uint64("to", rangeEnd),
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zap.Duration("took", time.Since(start)))
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// Requesting each slot
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for slot := rangeStart; slot <= rangeEnd; slot++ {
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go s.retryFetchBlock(ctx, logger, slot, 0)
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}
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s.lastSlot = slot
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}
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}
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}()
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select {
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case <-ctx.Done():
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return ctx.Err()
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case err := <-errC:
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return err
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}
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}
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func (s *SolanaWatcher) retryFetchBlock(ctx context.Context, logger *zap.Logger, slot uint64, retry uint) {
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ok := s.fetchBlock(ctx, logger, slot, 0)
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if !ok {
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if retry >= maxRetries {
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logger.Error("max retries for block",
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Uint("retry", retry))
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return
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}
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time.Sleep(retryDelay)
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logger.Info("retrying block",
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Uint("retry", retry))
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go s.retryFetchBlock(ctx, logger, slot, retry+1)
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}
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}
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func (s *SolanaWatcher) fetchBlock(ctx context.Context, logger *zap.Logger, slot uint64, emptyRetry uint) (ok bool) {
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logger.Debug("requesting block",
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Uint("empty_retry", emptyRetry))
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rCtx, cancel := context.WithTimeout(ctx, rpcTimeout)
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defer cancel()
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start := time.Now()
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rewards := false
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maxSupportedTransactionVersion := uint64(0)
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out, err := s.rpcClient.GetBlockWithOpts(rCtx, slot, &rpc.GetBlockOpts{
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Encoding: solana.EncodingBase64, // solana-go doesn't support json encoding.
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TransactionDetails: "full",
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Rewards: &rewards,
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Commitment: s.commitment,
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MaxSupportedTransactionVersion: &maxSupportedTransactionVersion,
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})
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queryLatency.WithLabelValues(s.networkName, "get_confirmed_block", string(s.commitment)).Observe(time.Since(start).Seconds())
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if err != nil {
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var rpcErr *jsonrpc.RPCError
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if errors.As(err, &rpcErr) && (rpcErr.Code == -32007 /* SLOT_SKIPPED */ || rpcErr.Code == -32004 /* BLOCK_NOT_AVAILABLE */) {
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logger.Info("empty slot", zap.Uint64("slot", slot),
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zap.Int("code", rpcErr.Code),
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zap.String("commitment", string(s.commitment)))
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// TODO(leo): clean this up once we know what's happening
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// https://github.com/solana-labs/solana/issues/20370
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var maxEmptyRetry uint
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if s.commitment == rpc.CommitmentFinalized {
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maxEmptyRetry = 5
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} else {
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maxEmptyRetry = 1
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}
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// Schedule a single retry just in case the Solana node was confused about the block being missing.
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if emptyRetry < maxEmptyRetry {
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go func() {
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time.Sleep(retryDelay)
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s.fetchBlock(ctx, logger, slot, emptyRetry+1)
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}()
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}
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return true
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} else {
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logger.Error("failed to request block", zap.Error(err), zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)))
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p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
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solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "get_confirmed_block_error").Inc()
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}
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return false
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}
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if out == nil {
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// Per the API, nil just means the block is not confirmed.
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logger.Info("block is not yet finalized", zap.Uint64("slot", slot))
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return false
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}
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logger.Debug("fetched block",
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zap.Uint64("slot", slot),
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zap.Int("num_tx", len(out.Transactions)),
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zap.Duration("took", time.Since(start)),
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zap.String("commitment", string(s.commitment)))
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s.updateLatestBlock(slot)
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OUTER:
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for txNum, txRpc := range out.Transactions {
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if txRpc.Meta.Err != nil {
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logger.Debug("Transaction failed, skipping it",
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zap.Uint64("slot", slot),
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zap.Int("txNum", txNum),
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zap.String("err", fmt.Sprint(txRpc.Meta.Err)),
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)
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continue
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}
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tx, err := txRpc.GetTransaction()
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if err != nil {
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logger.Error("failed to unmarshal transaction",
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zap.Uint64("slot", slot),
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zap.Int("txNum", txNum),
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zap.Int("dataLen", len(txRpc.Transaction.GetBinary())),
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zap.Error(err),
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)
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continue
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}
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signature := tx.Signatures[0]
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var programIndex uint16
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for n, key := range tx.Message.AccountKeys {
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if key.Equals(s.contract) {
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programIndex = uint16(n)
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}
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}
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if programIndex == 0 {
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continue
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}
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if txRpc.Meta.Err != nil {
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logger.Debug("skipping failed Wormhole transaction",
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zap.Stringer("signature", signature),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)))
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continue
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}
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logger.Debug("found Wormhole transaction",
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zap.Stringer("signature", signature),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)))
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// Find top-level instructions
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for i, inst := range tx.Message.Instructions {
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found, err := s.processInstruction(ctx, logger, slot, inst, programIndex, tx, signature, i)
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if err != nil {
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logger.Error("malformed Wormhole instruction",
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zap.Error(err),
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zap.Int("idx", i),
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zap.Stringer("signature", signature),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Binary("data", inst.Data))
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continue OUTER
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}
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if found {
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continue OUTER
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}
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}
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// Call GetConfirmedTransaction to get at innerTransactions
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rCtx, cancel := context.WithTimeout(ctx, rpcTimeout)
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start := time.Now()
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maxSupportedTransactionVersion := uint64(0)
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tr, err := s.rpcClient.GetTransaction(rCtx, signature, &rpc.GetTransactionOpts{
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Encoding: solana.EncodingBase64, // solana-go doesn't support json encoding.
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Commitment: s.commitment,
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MaxSupportedTransactionVersion: &maxSupportedTransactionVersion,
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})
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cancel()
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queryLatency.WithLabelValues(s.networkName, "get_confirmed_transaction", string(s.commitment)).Observe(time.Since(start).Seconds())
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
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solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "get_confirmed_transaction_error").Inc()
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logger.Error("failed to request transaction",
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zap.Error(err),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Stringer("signature", signature))
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return false
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}
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logger.Debug("fetched transaction",
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)),
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zap.Stringer("signature", signature),
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zap.Duration("took", time.Since(start)))
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for _, inner := range tr.Meta.InnerInstructions {
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for i, inst := range inner.Instructions {
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_, err = s.processInstruction(ctx, logger, slot, inst, programIndex, tx, signature, i)
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if err != nil {
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logger.Error("malformed Wormhole instruction",
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zap.Error(err),
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zap.Int("idx", i),
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zap.Stringer("signature", signature),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)))
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}
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}
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}
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}
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if emptyRetry > 0 {
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logger.Warn("SOLANA BUG: skipped or unavailable block retrieved on retry attempt",
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zap.Uint("empty_retry", emptyRetry),
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zap.Uint64("slot", slot),
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zap.String("commitment", string(s.commitment)))
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}
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return true
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}
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func (s *SolanaWatcher) processInstruction(ctx context.Context, logger *zap.Logger, slot uint64, inst solana.CompiledInstruction, programIndex uint16, tx *solana.Transaction, signature solana.Signature, idx int) (bool, error) {
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if inst.ProgramIDIndex != programIndex {
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return false, nil
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}
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if len(inst.Data) == 0 {
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return false, nil
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}
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if inst.Data[0] != postMessageInstructionID && inst.Data[0] != postMessageUnreliableInstructionID {
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return false, nil
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}
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if len(inst.Accounts) != postMessageInstructionNumAccounts {
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return false, fmt.Errorf("invalid number of accounts: %d instead of %d",
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len(inst.Accounts), postMessageInstructionNumAccounts)
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}
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// Decode instruction data (UNTRUSTED)
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var data PostMessageData
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if err := borsh.Deserialize(&data, inst.Data[1:]); err != nil {
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return false, fmt.Errorf("failed to deserialize instruction data: %w", err)
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}
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logger.Debug("post message data", zap.Any("deserialized_data", data),
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zap.Stringer("signature", signature), zap.Uint64("slot", slot), zap.Int("idx", idx))
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level, err := data.ConsistencyLevel.Commitment()
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if err != nil {
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return false, fmt.Errorf("failed to determine commitment: %w", err)
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}
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if level != s.commitment {
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return true, nil
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}
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// The second account in a well-formed Wormhole instruction is the VAA program account.
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acc := tx.Message.AccountKeys[inst.Accounts[1]]
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logger.Debug("fetching VAA account", zap.Stringer("acc", acc),
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zap.Stringer("signature", signature), zap.Uint64("slot", slot), zap.Int("idx", idx))
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go s.retryFetchMessageAccount(ctx, logger, acc, slot, 0)
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return true, nil
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}
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func (s *SolanaWatcher) retryFetchMessageAccount(ctx context.Context, logger *zap.Logger, acc solana.PublicKey, slot uint64, retry uint) {
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retryable := s.fetchMessageAccount(ctx, logger, acc, slot)
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if retryable {
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if retry >= maxRetries {
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logger.Error("max retries for account",
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zap.Uint64("slot", slot),
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zap.Stringer("account", acc),
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zap.String("commitment", string(s.commitment)),
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zap.Uint("retry", retry))
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return
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}
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time.Sleep(retryDelay)
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logger.Info("retrying account",
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zap.Uint64("slot", slot),
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zap.Stringer("account", acc),
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zap.String("commitment", string(s.commitment)),
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zap.Uint("retry", retry))
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go s.retryFetchMessageAccount(ctx, logger, acc, slot, retry+1)
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}
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}
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func (s *SolanaWatcher) fetchMessageAccount(ctx context.Context, logger *zap.Logger, acc solana.PublicKey, slot uint64) (retryable bool) {
|
|
// Fetching account
|
|
rCtx, cancel := context.WithTimeout(ctx, rpcTimeout)
|
|
defer cancel()
|
|
start := time.Now()
|
|
info, err := s.rpcClient.GetAccountInfoWithOpts(rCtx, acc, &rpc.GetAccountInfoOpts{
|
|
Encoding: solana.EncodingBase64,
|
|
Commitment: s.commitment,
|
|
})
|
|
queryLatency.WithLabelValues(s.networkName, "get_account_info", string(s.commitment)).Observe(time.Since(start).Seconds())
|
|
if err != nil {
|
|
p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
|
|
solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "get_account_info_error").Inc()
|
|
logger.Error("failed to request account",
|
|
zap.Error(err),
|
|
zap.Uint64("slot", slot),
|
|
zap.String("commitment", string(s.commitment)),
|
|
zap.Stringer("account", acc))
|
|
return true
|
|
}
|
|
|
|
if !info.Value.Owner.Equals(s.contract) {
|
|
p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
|
|
solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "account_owner_mismatch").Inc()
|
|
logger.Error("account has invalid owner",
|
|
zap.Uint64("slot", slot),
|
|
zap.String("commitment", string(s.commitment)),
|
|
zap.Stringer("account", acc),
|
|
zap.Stringer("unexpected_owner", info.Value.Owner))
|
|
return false
|
|
}
|
|
|
|
data := info.Value.Data.GetBinary()
|
|
if string(data[:3]) != accountPrefixReliable && string(data[:3]) != accountPrefixUnreliable {
|
|
p2p.DefaultRegistry.AddErrorCount(s.chainID, 1)
|
|
solanaConnectionErrors.WithLabelValues(s.networkName, string(s.commitment), "bad_account_data").Inc()
|
|
logger.Error("account is not a message account",
|
|
zap.Uint64("slot", slot),
|
|
zap.String("commitment", string(s.commitment)),
|
|
zap.Stringer("account", acc))
|
|
return false
|
|
}
|
|
|
|
logger.Debug("found valid VAA account",
|
|
zap.Uint64("slot", slot),
|
|
zap.String("commitment", string(s.commitment)),
|
|
zap.Stringer("account", acc),
|
|
zap.Binary("data", data))
|
|
|
|
s.processMessageAccount(logger, data, acc)
|
|
return false
|
|
}
|
|
|
|
func (s *SolanaWatcher) processMessageAccount(logger *zap.Logger, data []byte, acc solana.PublicKey) {
|
|
proposal, err := ParseMessagePublicationAccount(data)
|
|
if err != nil {
|
|
solanaAccountSkips.WithLabelValues(s.networkName, "parse_transfer_out").Inc()
|
|
logger.Error(
|
|
"failed to parse transfer proposal",
|
|
zap.Stringer("account", acc),
|
|
zap.Binary("data", data),
|
|
zap.Error(err))
|
|
return
|
|
}
|
|
|
|
var txHash eth_common.Hash
|
|
copy(txHash[:], acc[:])
|
|
|
|
var reliable bool
|
|
switch string(data[:3]) {
|
|
case accountPrefixReliable:
|
|
reliable = true
|
|
case accountPrefixUnreliable:
|
|
reliable = false
|
|
default:
|
|
panic("invalid prefix")
|
|
}
|
|
|
|
observation := &common.MessagePublication{
|
|
TxHash: txHash,
|
|
Timestamp: time.Unix(int64(proposal.SubmissionTime), 0),
|
|
Nonce: proposal.Nonce,
|
|
Sequence: proposal.Sequence,
|
|
EmitterChain: s.chainID,
|
|
EmitterAddress: proposal.EmitterAddress,
|
|
Payload: proposal.Payload,
|
|
ConsistencyLevel: proposal.ConsistencyLevel,
|
|
Unreliable: !reliable,
|
|
}
|
|
|
|
solanaMessagesConfirmed.WithLabelValues(s.networkName).Inc()
|
|
|
|
logger.Debug("message observed",
|
|
zap.Stringer("account", acc),
|
|
zap.Time("timestamp", observation.Timestamp),
|
|
zap.Uint32("nonce", observation.Nonce),
|
|
zap.Uint64("sequence", observation.Sequence),
|
|
zap.Stringer("emitter_chain", observation.EmitterChain),
|
|
zap.Stringer("emitter_address", observation.EmitterAddress),
|
|
zap.Binary("payload", observation.Payload),
|
|
zap.Uint8("consistency_level", observation.ConsistencyLevel),
|
|
)
|
|
|
|
s.messageEvent <- observation
|
|
}
|
|
|
|
// updateLatestBlock() updates the latest block number if the slot passed in is greater than the previous value.
|
|
// This check is necessary because blocks can be posted out of order, due to multi threading in this watcher.
|
|
func (s *SolanaWatcher) updateLatestBlock(slot uint64) {
|
|
s.latestBlockNumberMu.Lock()
|
|
defer s.latestBlockNumberMu.Unlock()
|
|
if slot > s.latestBlockNumber {
|
|
s.latestBlockNumber = slot
|
|
}
|
|
}
|
|
|
|
// GetLatestFinalizedBlockNumber() returns the latest published block.
|
|
func (s *SolanaWatcher) GetLatestFinalizedBlockNumber() uint64 {
|
|
s.latestBlockNumberMu.Lock()
|
|
defer s.latestBlockNumberMu.Unlock()
|
|
return s.latestBlockNumber
|
|
}
|
|
|
|
type (
|
|
MessagePublicationAccount struct {
|
|
VaaVersion uint8
|
|
// Borsh does not seem to support booleans, so 0=false / 1=true
|
|
ConsistencyLevel uint8
|
|
VaaTime uint32
|
|
VaaSignatureAccount vaa.Address
|
|
SubmissionTime uint32
|
|
Nonce uint32
|
|
Sequence uint64
|
|
EmitterChain uint16
|
|
EmitterAddress vaa.Address
|
|
Payload []byte
|
|
}
|
|
)
|
|
|
|
func ParseMessagePublicationAccount(data []byte) (*MessagePublicationAccount, error) {
|
|
prop := &MessagePublicationAccount{}
|
|
// Skip the b"msg" prefix
|
|
if err := borsh.Deserialize(prop, data[3:]); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return prop, nil
|
|
}
|