/
heimdall.go
227 lines (188 loc) · 6.97 KB
/
heimdall.go
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package listener
import (
"context"
"math/big"
"strconv"
"time"
"github.com/RichardKnop/machinery/v1/tasks"
sdk "github.com/cosmos/cosmos-sdk/types"
jsoniter "github.com/json-iterator/go"
checkpointTypes "github.com/maticnetwork/heimdall/checkpoint/types"
"github.com/maticnetwork/heimdall/helper"
slashingTypes "github.com/maticnetwork/heimdall/slashing/types"
)
const (
heimdallLastBlockKey = "heimdall-last-block" // storage key
)
// HeimdallListener - Listens to and process events from heimdall
type HeimdallListener struct {
BaseListener
}
// NewHeimdallListener - constructor func
func NewHeimdallListener() *HeimdallListener {
return &HeimdallListener{}
}
// Start starts new block subscription
func (hl *HeimdallListener) Start() error {
hl.Logger.Info("Starting")
// create cancellable context
headerCtx, cancelHeaderProcess := context.WithCancel(context.Background())
hl.cancelHeaderProcess = cancelHeaderProcess
// Heimdall pollIntervall = (minimal pollInterval of rootchain and matichain)
pollInterval := helper.GetConfig().SyncerPollInterval
if helper.GetConfig().CheckpointerPollInterval < helper.GetConfig().SyncerPollInterval {
pollInterval = helper.GetConfig().CheckpointerPollInterval
}
hl.Logger.Info("Start polling for events", "pollInterval", pollInterval)
hl.StartPolling(headerCtx, pollInterval, nil)
return nil
}
// ProcessHeader -
func (hl *HeimdallListener) ProcessHeader(_ *blockHeader) {
}
// StartPolling - starts polling for heimdall events
func (hl *HeimdallListener) StartPolling(ctx context.Context, pollInterval time.Duration, _ *big.Int) {
// How often to fire the passed in function in second
interval := pollInterval
// Setup the ticket and the channel to signal
// the ending of the interval
ticker := time.NewTicker(interval)
// var eventTypes []string
// eventTypes = append(eventTypes, "message.action='checkpoint'")
// eventTypes = append(eventTypes, "message.action='event-record'")
// eventTypes = append(eventTypes, "message.action='tick'")
// ADD EVENT TYPE for SLASH-LIMIT
// start listening
for {
select {
case <-ticker.C:
fromBlock, toBlock, err := hl.fetchFromAndToBlock()
if err != nil {
hl.Logger.Error("Error fetching from and toBlock, skipping events query", "fromBlock", fromBlock, "toBlock", toBlock, "error", err)
} else if fromBlock < toBlock {
hl.Logger.Info("Fetching new events between", "fromBlock", fromBlock, "toBlock", toBlock)
// Querying and processing Begin events
for i := fromBlock; i <= toBlock; i++ {
// nolint: contextcheck
events, err := helper.GetBeginBlockEvents(hl.httpClient, int64(i))
if err != nil {
hl.Logger.Error("Error fetching begin block events", "error", err)
}
for _, event := range events {
hl.ProcessBlockEvent(sdk.StringifyEvent(event), int64(i))
}
}
// Querying and processing tx Events. Below for loop is kept for future purpose to process events from tx
/* for _, eventType := range eventTypes {
var query []string
query = append(query, eventType)
query = append(query, fmt.Sprintf("tx.height>=%v", fromBlock))
query = append(query, fmt.Sprintf("tx.height<=%v", toBlock))
limit := 50
for page := 1; page > 0; {
searchResult, err := helper.QueryTxsByEvents(hl.cliCtx, query, page, limit)
hl.Logger.Debug("Fetching new events using search query", "query", query, "page", page, "limit", limit)
if err != nil {
hl.Logger.Error("Error while searching events", "eventType", eventType, "error", err)
break
}
for _, tx := range searchResult.Txs {
for _, log := range tx.Logs {
event := helper.FilterEvents(log.Events, func(et sdk.StringEvent) bool {
return et.Type == checkpointTypes.EventTypeCheckpoint || et.Type == clerkTypes.EventTypeRecord
})
if event != nil {
hl.ProcessEvent(*event, tx)
}
}
}
if len(searchResult.Txs) == limit {
page = page + 1
} else {
page = 0
}
}
} */
// set last block to storage
if err := hl.storageClient.Put([]byte(heimdallLastBlockKey), []byte(strconv.FormatUint(toBlock, 10)), nil); err != nil {
hl.Logger.Error("hl.storageClient.Put", "Error", err)
}
}
case <-ctx.Done():
hl.Logger.Info("Polling stopped")
ticker.Stop()
return
}
}
}
func (hl *HeimdallListener) fetchFromAndToBlock() (uint64, uint64, error) {
// toBlock - get latest blockheight from heimdall node
fromBlock := uint64(0)
toBlock := uint64(0)
nodeStatus, err := helper.GetNodeStatus(hl.cliCtx)
if err != nil {
hl.Logger.Error("Error while fetching heimdall node status", "error", err)
return fromBlock, toBlock, err
}
toBlock = uint64(nodeStatus.SyncInfo.LatestBlockHeight)
// fromBlock - get last block from storage
hasLastBlock, _ := hl.storageClient.Has([]byte(heimdallLastBlockKey), nil)
if hasLastBlock {
lastBlockBytes, err := hl.storageClient.Get([]byte(heimdallLastBlockKey), nil)
if err != nil {
hl.Logger.Info("Error while fetching last block bytes from storage", "error", err)
return fromBlock, toBlock, err
}
if result, err := strconv.ParseUint(string(lastBlockBytes), 10, 64); err == nil {
hl.Logger.Debug("Got last block from bridge storage", "lastBlock", result)
fromBlock = result + 1
} else {
hl.Logger.Info("Error parsing last block bytes from storage", "error", err)
toBlock = 0
return fromBlock, toBlock, err
}
}
return fromBlock, toBlock, err
}
// ProcessBlockEvent - process Blockevents (BeginBlock, EndBlock events) from heimdall.
func (hl *HeimdallListener) ProcessBlockEvent(event sdk.StringEvent, blockHeight int64) {
hl.Logger.Info("Received block event from Heimdall", "eventType", event.Type)
eventBytes, err := jsoniter.ConfigFastest.Marshal(event)
if err != nil {
hl.Logger.Error("Error while parsing block event", "eventType", event.Type, "error", err)
return
}
switch event.Type {
case checkpointTypes.EventTypeCheckpoint:
hl.sendBlockTask("sendCheckpointToRootchain", eventBytes, blockHeight)
case slashingTypes.EventTypeSlashLimit:
hl.sendBlockTask("sendTickToHeimdall", eventBytes, blockHeight)
case slashingTypes.EventTypeTickConfirm:
hl.sendBlockTask("sendTickToRootchain", eventBytes, blockHeight)
default:
hl.Logger.Debug("BlockEvent Type mismatch", "eventType", event.Type)
}
}
func (hl *HeimdallListener) sendBlockTask(taskName string, eventBytes []byte, blockHeight int64) {
// create machinery task
signature := &tasks.Signature{
Name: taskName,
Args: []tasks.Arg{
{
Type: "string",
Value: string(eventBytes),
},
{
Type: "int64",
Value: blockHeight,
},
},
}
signature.RetryCount = 3
hl.Logger.Info("Sending block level task", "taskName", taskName, "currentTime", time.Now(), "blockHeight", blockHeight)
// send task
_, err := hl.queueConnector.Server.SendTask(signature)
if err != nil {
hl.Logger.Error("Error sending block level task", "taskName", taskName, "blockHeight", blockHeight, "error", err)
}
}