304 lines
9.5 KiB
Go
304 lines
9.5 KiB
Go
package terra
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import (
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"context"
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"encoding/hex"
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"fmt"
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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/prometheus/client_golang/prometheus/promauto"
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"io/ioutil"
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"net/http"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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eth_common "github.com/ethereum/go-ethereum/common"
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"github.com/certusone/wormhole/node/pkg/common"
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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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"github.com/certusone/wormhole/node/pkg/vaa"
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"github.com/gorilla/websocket"
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"github.com/tidwall/gjson"
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"go.uber.org/zap"
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)
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type (
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// BridgeWatcher is responsible for looking over Terra blockchain and reporting new transactions to the bridge
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BridgeWatcher struct {
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urlWS string
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urlLCD string
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bridge string
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msgChan chan *common.MessagePublication
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setChan chan *common.GuardianSet
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}
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)
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var (
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terraConnectionErrors = promauto.NewCounterVec(
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prometheus.CounterOpts{
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Name: "wormhole_terra_connection_errors_total",
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Help: "Total number of Terra connection errors",
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}, []string{"reason"})
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terraMessagesConfirmed = promauto.NewCounter(
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prometheus.CounterOpts{
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Name: "wormhole_terra_messages_confirmed_total",
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Help: "Total number of verified terra messages found",
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})
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currentTerraHeight = promauto.NewGauge(
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prometheus.GaugeOpts{
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Name: "wormhole_terra_current_height",
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Help: "Current terra slot height (at default commitment level, not the level used for observations)",
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})
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queryLatency = promauto.NewHistogramVec(
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prometheus.HistogramOpts{
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Name: "wormhole_terra_query_latency",
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Help: "Latency histogram for terra RPC calls",
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}, []string{"operation"})
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)
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type clientRequest struct {
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JSONRPC string `json:"jsonrpc"`
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// A String containing the name of the method to be invoked.
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Method string `json:"method"`
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// Object to pass as request parameter to the method.
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Params [1]string `json:"params"`
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// The request id. This can be of any type. It is used to match the
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// response with the request that it is replying to.
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ID uint64 `json:"id"`
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}
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// NewTerraBridgeWatcher creates a new terra bridge watcher
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func NewTerraBridgeWatcher(urlWS string, urlLCD string, bridge string, lockEvents chan *common.MessagePublication, setEvents chan *common.GuardianSet) *BridgeWatcher {
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return &BridgeWatcher{urlWS: urlWS, urlLCD: urlLCD, bridge: bridge, msgChan: lockEvents, setChan: setEvents}
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}
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// Run is the main Terra Bridge run cycle
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func (e *BridgeWatcher) Run(ctx context.Context) error {
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p2p.DefaultRegistry.SetNetworkStats(vaa.ChainIDTerra, &gossipv1.Heartbeat_Network{
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BridgeAddress: e.bridge,
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})
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errC := make(chan error)
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logger := supervisor.Logger(ctx)
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logger.Info("connecting to websocket", zap.String("url", e.urlWS))
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c, _, err := websocket.DefaultDialer.DialContext(ctx, e.urlWS, nil)
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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terraConnectionErrors.WithLabelValues("websocket_dial_error").Inc()
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return fmt.Errorf("websocket dial failed: %w", err)
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}
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defer c.Close()
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// Subscribe to smart contract transactions
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params := [...]string{fmt.Sprintf("tm.event='Tx' AND execute_contract.contract_address='%s'", e.bridge)}
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command := &clientRequest{
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JSONRPC: "2.0",
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Method: "subscribe",
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Params: params,
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ID: 1,
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}
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err = c.WriteJSON(command)
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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terraConnectionErrors.WithLabelValues("websocket_subscription_error").Inc()
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return fmt.Errorf("websocket subscription failed: %w", err)
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}
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// Wait for the success response
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_, _, err = c.ReadMessage()
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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terraConnectionErrors.WithLabelValues("event_subscription_error").Inc()
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return fmt.Errorf("event subscription failed: %w", err)
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}
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logger.Info("subscribed to new transaction events")
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readiness.SetReady(common.ReadinessTerraSyncing)
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go func() {
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t := time.NewTicker(5 * time.Second)
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client := &http.Client{
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Timeout: time.Second * 5,
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}
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for {
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<-t.C
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// Query and report height and set currentTerraHeight
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resp, err := client.Get(fmt.Sprintf("%s/blocks/latest", e.urlLCD))
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if err != nil {
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logger.Error("query latest block response error", zap.Error(err))
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continue
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}
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blocksBody, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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logger.Error("query guardian set error", zap.Error(err))
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errC <- err
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resp.Body.Close()
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continue
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}
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resp.Body.Close()
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blockJSON := string(blocksBody)
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latestBlock := gjson.Get(blockJSON, "block.header.height")
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logger.Info("current Terra height", zap.Int64("block", latestBlock.Int()))
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currentTerraHeight.Set(float64(latestBlock.Int()))
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p2p.DefaultRegistry.SetNetworkStats(vaa.ChainIDTerra, &gossipv1.Heartbeat_Network{
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Height: latestBlock.Int(),
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BridgeAddress: e.bridge,
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})
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}
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}()
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go func() {
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defer close(errC)
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for {
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_, message, err := c.ReadMessage()
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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terraConnectionErrors.WithLabelValues("channel_read_error").Inc()
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logger.Error("error reading channel", zap.Error(err))
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errC <- err
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return
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}
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// Received a message from the blockchain
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json := string(message)
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payload := gjson.Get(json, "result.events.from_contract\\.message\\.message.0")
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sender := gjson.Get(json, "result.events.from_contract\\.message\\.sender.0")
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chainId := gjson.Get(json, "result.events.from_contract\\.message\\.chain_id.0")
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nonce := gjson.Get(json, "result.events.from_contract\\.message\\.nonce.0")
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sequence := gjson.Get(json, "result.events.from_contract\\.message\\.sequence.0")
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blockTime := gjson.Get(json, "result.events.from_contract\\.message\\.block_time.0")
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txHash := gjson.Get(json, "result.events.tx\\.hash.0")
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if payload.Exists() && sender.Exists() && chainId.Exists() && nonce.Exists() && sequence.Exists() &&
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blockTime.Exists() && txHash.Exists() {
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logger.Info("new message detected on terra",
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zap.String("chainId", chainId.String()),
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zap.String("txHash", txHash.String()),
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zap.String("sender", sender.String()),
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zap.String("nonce", nonce.String()),
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zap.String("sequence", sequence.String()),
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zap.String("blockTime", blockTime.String()),
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)
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senderAddress, err := StringToAddress(sender.String())
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if err != nil {
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logger.Error("cannot decode emitter hex", zap.String("value", sender.String()))
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continue
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}
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txHashValue, err := StringToHash(txHash.String())
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if err != nil {
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logger.Error("cannot decode tx hash hex", zap.String("value", txHash.String()))
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continue
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}
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payloadValue, err := hex.DecodeString(payload.String())
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if err != nil {
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logger.Error("cannot decode payload", zap.String("value", payload.String()))
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continue
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}
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messagePublication := &common.MessagePublication{
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TxHash: txHashValue,
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Timestamp: time.Unix(blockTime.Int(), 0),
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Nonce: uint32(nonce.Uint()),
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Sequence: sequence.Uint(),
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EmitterChain: vaa.ChainIDTerra,
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EmitterAddress: senderAddress,
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Payload: payloadValue,
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ConsistencyLevel: 0, // Instant finality
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}
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e.msgChan <- messagePublication
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terraMessagesConfirmed.Inc()
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}
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client := &http.Client{
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Timeout: time.Second * 15,
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}
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// Query and report guardian set status
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requestURL := fmt.Sprintf("%s/wasm/contracts/%s/store?query_msg={\"guardian_set_info\":{}}", e.urlLCD, e.bridge)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, requestURL, nil)
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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terraConnectionErrors.WithLabelValues("guardian_set_req_error").Inc()
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logger.Error("query guardian set request error", zap.Error(err))
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errC <- err
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return
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}
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msm := time.Now()
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resp, err := client.Do(req)
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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logger.Error("query guardian set response error", zap.Error(err))
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errC <- err
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return
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}
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body, err := ioutil.ReadAll(resp.Body)
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queryLatency.WithLabelValues("guardian_set_info").Observe(time.Since(msm).Seconds())
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if err != nil {
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p2p.DefaultRegistry.AddErrorCount(vaa.ChainIDTerra, 1)
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logger.Error("query guardian set error", zap.Error(err))
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errC <- err
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resp.Body.Close()
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return
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}
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json = string(body)
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guardianSetIndex := gjson.Get(json, "result.guardian_set_index")
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addresses := gjson.Get(json, "result.addresses.#.bytes")
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logger.Debug("current guardian set on Terra",
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zap.Any("guardianSetIndex", guardianSetIndex),
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zap.Any("addresses", addresses))
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resp.Body.Close()
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// We do not send guardian changes to the processor - ETH guardians are the source of truth.
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}
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}()
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select {
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case <-ctx.Done():
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err := c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
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if err != nil {
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logger.Error("error on closing socket ", zap.Error(err))
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}
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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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// StringToAddress convert string into address
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func StringToAddress(value string) (vaa.Address, error) {
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var address vaa.Address
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res, err := hex.DecodeString(value)
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if err != nil {
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return address, err
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}
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copy(address[:], res)
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return address, nil
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}
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// StringToHash convert string into transaction hash
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func StringToHash(value string) (eth_common.Hash, error) {
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var hash eth_common.Hash
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res, err := hex.DecodeString(value)
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if err != nil {
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return hash, err
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}
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copy(hash[:], res)
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return hash, nil
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}
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