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handle_message_sent_event.go
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handle_message_sent_event.go
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package indexer
import (
"context"
"encoding/json"
"math/big"
"time"
"log/slog"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/pkg/errors"
"github.com/taikoxyz/taiko-mono/packages/relayer"
"github.com/taikoxyz/taiko-mono/packages/relayer/bindings/bridge"
"github.com/taikoxyz/taiko-mono/packages/relayer/pkg/queue"
)
var (
defaultCtxTimeout = 3 * time.Minute
defaultConfirmations = 5
)
// handleMessageSentEvent handles an individual MessageSent event
func (i *Indexer) handleMessageSentEvent(
ctx context.Context,
chainID *big.Int,
event *bridge.BridgeMessageSent,
waitForConfirmations bool,
) error {
// if the destinatio chain doesnt match, we dont process it in this indexer.
if new(big.Int).SetUint64(event.Message.DestChainId).Cmp(i.destChainId) != 0 {
return nil
}
slog.Info("MessageSent event found for msgHash",
"msgHash",
common.Hash(event.MsgHash).Hex(),
"txHash",
event.Raw.TxHash.Hex(),
"srcChainId", event.Message.SrcChainId,
"destChainId", event.Message.DestChainId,
)
if event.Raw.Removed {
slog.Info("event is removed")
return nil
}
// we should never see an empty msgHash, but if we do, we dont process.
if event.MsgHash == relayer.ZeroHash {
slog.Warn("Zero msgHash found. This is unexpected. Returning early")
return nil
}
if waitForConfirmations {
// we need to wait for confirmations to confirm this event is not being reverted,
// removed, or reorged now.
confCtx, confCtxCancel := context.WithTimeout(ctx, defaultCtxTimeout)
defer confCtxCancel()
if err := relayer.WaitConfirmations(
confCtx,
i.srcEthClient,
uint64(defaultConfirmations),
event.Raw.TxHash,
); err != nil {
return err
}
}
// get event status from msgHash on chain
eventStatus, err := i.eventStatusFromMsgHash(ctx, event.Message.GasLimit, event.MsgHash)
if err != nil {
return errors.Wrap(err, "svc.eventStatusFromMsgHash")
}
marshaled, err := json.Marshal(event)
if err != nil {
return errors.Wrap(err, "json.Marshal(event)")
}
id, err := i.saveEventToDB(
ctx,
marshaled,
common.Hash(event.MsgHash).Hex(),
chainID,
eventStatus,
event.Message.SrcOwner.Hex(),
event.Message.Data,
event.Message.Value,
event.Raw.BlockNumber,
)
if err != nil {
return errors.Wrap(err, "i.saveEventToDB")
}
// only add messages with new status to queue
if eventStatus != relayer.EventStatusNew {
return nil
}
msg := queue.QueueMessageSentBody{
ID: id,
Event: event,
}
marshalledMsg, err := json.Marshal(msg)
if err != nil {
return errors.Wrap(err, "json.Marshal")
}
// we add it to the queue, so the processor can pick up and attempt to process
// the message onchain.
if err := i.queue.Publish(ctx, marshalledMsg); err != nil {
return errors.Wrap(err, "i.queue.Publish")
}
relayer.MessageSentEventsIndexed.Inc()
return nil
}
func (i *Indexer) eventStatusFromMsgHash(
ctx context.Context,
gasLimit *big.Int,
signal [32]byte,
) (relayer.EventStatus, error) {
var eventStatus relayer.EventStatus
ctx, cancel := context.WithTimeout(ctx, i.ethClientTimeout)
defer cancel()
messageStatus, err := i.destBridge.MessageStatus(&bind.CallOpts{
Context: ctx,
}, signal)
if err != nil {
return 0, errors.Wrap(err, "svc.destBridge.GetMessageStatus")
}
eventStatus = relayer.EventStatus(messageStatus)
return eventStatus, nil
}