/
reobserve.go
165 lines (148 loc) · 4.63 KB
/
reobserve.go
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package alephium
import (
"context"
"encoding/hex"
sdk "github.com/alephium/go-sdk"
"github.com/alephium/wormhole-fork/node/pkg/vaa"
"go.uber.org/zap"
)
func (w *Watcher) handleObsvRequest(ctx context.Context, logger *zap.Logger, client *Client) {
for {
select {
case <-ctx.Done():
return
case req := <-w.obsvReqC:
if req.ChainId != uint32(vaa.ChainIDAlephium) {
logger.Error("invalid chain id, expect alephium", zap.Uint32("chainId", req.ChainId))
continue
}
if len(req.TxHash) != 32 {
logger.Error("invalid tx id, expect 32 bytes", zap.Int("haveSize", len(req.TxHash)))
continue
}
txId := hex.EncodeToString(req.TxHash[0:32])
logger.Debug("handling re-observe request", zap.String("txId", txId))
txStatus, err := client.GetTransactionStatus(ctx, txId)
if err != nil {
logger.Error("failed to get transaction status", zap.String("txId", txId), zap.Error(err))
continue
}
if txStatus.Confirmed == nil {
logger.Error("tx is not confirmed", zap.Error(err), zap.String("txId", txId))
continue
}
blockHash := txStatus.Confirmed.BlockHash
events, err := w.getGovernanceEventsByTxId(ctx, logger, client, w.governanceContractAddress, blockHash, txId)
if err != nil {
logger.Error("failed to get events from block", zap.String("blockHash", blockHash), zap.Error(err))
continue
}
alphMessagesObserved.Add(float64(len(events)))
isCanonical, err := client.IsBlockInMainChain(ctx, blockHash)
if err != nil {
logger.Error("failed to check mainchain block", zap.String("blockHash", blockHash), zap.Error(err))
continue
}
if !*isCanonical {
alphMessagesOrphaned.Add(float64(len(events)))
logger.Info("ignore orphan block", zap.String("blockHash", blockHash))
continue
}
currentHeight, err := w.client.GetCurrentHeight(ctx, w.chainIndex)
if err != nil {
logger.Info("failed to get current block height", zap.Error(err))
continue
}
confirmed := make([]*reobservedEvent, 0)
for _, event := range events {
if event.header.Height+int32(event.confirmations) <= *currentHeight {
logger.Info("re-observed event",
zap.String("txId", txId),
zap.String("blockHash", blockHash),
zap.Int32("blockHeight", event.header.Height),
zap.Int32("currentHeight", *currentHeight),
zap.Uint8("confirmations", event.confirmations),
)
alphMessagesConfirmed.Add(float64(len(events)))
confirmed = append(confirmed, event)
} else {
logger.Info("ignore unconfirmed re-observed event",
zap.String("txId", txId),
zap.String("blockHash", blockHash),
zap.Int32("blockHeight", event.header.Height),
zap.Int32("currentHeight", *currentHeight),
zap.Uint8("confirmations", event.confirmations),
)
}
}
if len(confirmed) == 0 {
continue
}
if err := w.handleGovernanceMessages(logger, confirmed); err != nil {
logger.Error("failed to reobserve transfer message", zap.Error(err))
}
}
}
}
func (w *Watcher) handleGovernanceMessages(logger *zap.Logger, confirmed []*reobservedEvent) error {
for _, e := range confirmed {
wormholeMsg, err := ToWormholeMessage(e.Fields, e.txId)
if err != nil {
logger.Error("invalid wormhole message", zap.Error(err), zap.String("txId", e.txId))
return err
}
if !wormholeMsg.senderId.equalWith(w.tokenBridgeContractId) {
logger.Error("invalid sender for wormhole message", zap.String("txId", e.txId))
continue
}
w.msgChan <- wormholeMsg.toMessagePublication(e.header)
}
return nil
}
func (w *Watcher) getGovernanceEventsByTxId(
ctx context.Context,
logger *zap.Logger,
client *Client,
address string,
blockHash string,
txId string,
) ([]*reobservedEvent, error) {
events, err := client.GetEventsByTxId(ctx, txId)
if err != nil {
return nil, err
}
reobservedEvents := make([]*reobservedEvent, 0)
for _, event := range events.Events {
if event.EventIndex != WormholeMessageEventIndex {
continue
}
header, err := client.GetBlockHeader(ctx, event.BlockHash)
if err != nil {
return nil, err
}
msg, err := ToWormholeMessage(event.Fields, txId)
if err != nil {
return nil, err
}
if msg.IsAttestTokenVAA() {
if err = w.validateAttestToken(ctx, msg); err != nil {
logger.Error("re-observe: ignore invalid attest token event", zap.Error(err))
continue
}
}
contractEvent := event
reobservedEvents = append(reobservedEvents, &reobservedEvent{
&contractEvent,
msg.consistencyLevel,
header,
txId,
})
}
return reobservedEvents, nil
}
type reobservedEvent struct {
*sdk.ContractEventByTxId
confirmations uint8
header *sdk.BlockHeaderEntry
txId string
}