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scanner.go
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scanner.go
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package upkeepstate
import (
"context"
"encoding/hex"
"fmt"
"io"
"github.com/ethereum/go-ethereum/common"
"github.com/smartcontractkit/chainlink/v2/core/chains/evm/logpoller"
ac "github.com/smartcontractkit/chainlink/v2/core/gethwrappers/generated/i_automation_v21_plus_common"
"github.com/smartcontractkit/chainlink/v2/core/logger"
"github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/logprovider"
)
var (
_ PerformedLogsScanner = &performedEventsScanner{}
workIDsBatchSize = 25
)
type PerformedLogsScanner interface {
ScanWorkIDs(ctx context.Context, workIDs ...string) ([]string, error)
Start(context.Context) error
io.Closer
}
type performedEventsScanner struct {
lggr logger.Logger
poller logpoller.LogPoller
registryAddress common.Address
finalityDepth uint32
}
func NewPerformedEventsScanner(
lggr logger.Logger,
poller logpoller.LogPoller,
registryAddress common.Address,
finalityDepth uint32,
) *performedEventsScanner {
return &performedEventsScanner{
lggr: lggr.Named("EventsScanner"),
poller: poller,
registryAddress: registryAddress,
finalityDepth: finalityDepth,
}
}
func (s *performedEventsScanner) Start(ctx context.Context) error {
return s.poller.RegisterFilter(ctx, logpoller.Filter{
Name: dedupFilterName(s.registryAddress),
EventSigs: []common.Hash{
// listening to dedup key added event
ac.IAutomationV21PlusCommonDedupKeyAdded{}.Topic(),
},
Addresses: []common.Address{s.registryAddress},
Retention: logprovider.LogRetention,
})
}
// Close implements io.Closer and does nothing
func (s *performedEventsScanner) Close() error {
return nil
}
func (s *performedEventsScanner) ScanWorkIDs(ctx context.Context, workID ...string) ([]string, error) {
var ids []common.Hash
for _, id := range workID {
ids = append(ids, common.HexToHash(id))
}
logs := make([]logpoller.Log, 0)
for i := 0; i < len(ids); i += workIDsBatchSize {
end := i + workIDsBatchSize
if end > len(ids) {
end = len(ids)
}
batch := ids[i:end]
batchLogs, err := s.poller.IndexedLogs(ctx, ac.IAutomationV21PlusCommonDedupKeyAdded{}.Topic(), s.registryAddress, 1, batch, logpoller.Confirmations(s.finalityDepth))
if err != nil {
return nil, fmt.Errorf("error fetching logs: %w", err)
}
logs = append(logs, batchLogs...)
}
return s.logsToWorkIDs(logs), nil
}
func (s *performedEventsScanner) logsToWorkIDs(logs []logpoller.Log) []string {
workIDs := make([]string, 0)
for _, log := range logs {
topics := log.GetTopics()
if len(topics) < 2 {
s.lggr.Debugw("unexpected log topics", "topics", topics)
continue
}
workIDs = append(workIDs, hex.EncodeToString(topics[1].Bytes()))
}
return workIDs
}
func dedupFilterName(addr common.Address) string {
return logpoller.FilterName("KeepersRegistry UpkeepStates Deduped", addr)
}