From 2afd9c259658f2a4d857493a92059bfd16608603 Mon Sep 17 00:00:00 2001
From: ferglor <19188060+ferglor@users.noreply.github.com>
Date: Mon, 4 Sep 2023 19:16:03 +0100
Subject: [PATCH] Return all logs even if seen before (#10473)

---
 .../evm21/transmit/event_provider.go          | 84 ++++++++++---------
 1 file changed, 43 insertions(+), 41 deletions(-)

diff --git a/core/services/ocr2/plugins/ocr2keeper/evm21/transmit/event_provider.go b/core/services/ocr2/plugins/ocr2keeper/evm21/transmit/event_provider.go
index eccc9304d99..a21cdd25eb0 100644
--- a/core/services/ocr2/plugins/ocr2keeper/evm21/transmit/event_provider.go
+++ b/core/services/ocr2/plugins/ocr2keeper/evm21/transmit/event_provider.go
@@ -170,52 +170,54 @@ func (c *TransmitEventProvider) processLogs(latestBlock int64, logs ...logpoller
 			// ensure we don't have duplicates
 			continue
 		}
-		if _, ok := c.cache.get(ocr2keepers.BlockNumber(log.BlockNumber), k); ok {
-			// ensure we return only unseen logs
-			continue
-		}
-		l, err := c.parseLog(c.registry, log)
-		if err != nil {
-			c.logger.Debugw("failed to parse log", "err", err)
-			continue
-		}
-		id := l.Id()
-		upkeepId := &ocr2keepers.UpkeepIdentifier{}
-		ok := upkeepId.FromBigInt(id)
+
+		transmitEvent, ok := c.cache.get(ocr2keepers.BlockNumber(log.BlockNumber), k)
 		if !ok {
-			return nil, core.ErrInvalidUpkeepID
+			l, err := c.parseLog(c.registry, log)
+			if err != nil {
+				c.logger.Debugw("failed to parse log", "err", err)
+				continue
+			}
+			id := l.Id()
+			upkeepId := &ocr2keepers.UpkeepIdentifier{}
+			ok := upkeepId.FromBigInt(id)
+			if !ok {
+				return nil, core.ErrInvalidUpkeepID
+			}
+			triggerW, err := core.UnpackTrigger(id, l.Trigger())
+			if err != nil {
+				return nil, fmt.Errorf("%w: failed to unpack trigger", err)
+			}
+			trigger := ocr2keepers.NewTrigger(
+				ocr2keepers.BlockNumber(triggerW.BlockNum),
+				triggerW.BlockHash,
+			)
+			switch core.GetUpkeepType(*upkeepId) {
+			case ocr2keepers.LogTrigger:
+				trigger.LogTriggerExtension = &ocr2keepers.LogTriggerExtension{}
+				trigger.LogTriggerExtension.TxHash = triggerW.TxHash
+				trigger.LogTriggerExtension.Index = triggerW.LogIndex
+			default:
+			}
+			workID := core.UpkeepWorkID(*upkeepId, trigger)
+			transmitEvent = ocr2keepers.TransmitEvent{
+				Type:            l.TransmitEventType(),
+				TransmitBlock:   ocr2keepers.BlockNumber(l.BlockNumber),
+				TransactionHash: l.TxHash,
+				WorkID:          workID,
+				UpkeepID:        *upkeepId,
+				CheckBlock:      trigger.BlockNumber,
+			}
 		}
-		triggerW, err := core.UnpackTrigger(id, l.Trigger())
-		if err != nil {
-			return nil, fmt.Errorf("%w: failed to unpack trigger", err)
-		}
-		trigger := ocr2keepers.NewTrigger(
-			ocr2keepers.BlockNumber(triggerW.BlockNum),
-			triggerW.BlockHash,
-		)
-		switch core.GetUpkeepType(*upkeepId) {
-		case ocr2keepers.LogTrigger:
-			trigger.LogTriggerExtension = &ocr2keepers.LogTriggerExtension{}
-			trigger.LogTriggerExtension.TxHash = triggerW.TxHash
-			trigger.LogTriggerExtension.Index = triggerW.LogIndex
-		default:
-		}
-		workID := core.UpkeepWorkID(*upkeepId, trigger)
-		e := ocr2keepers.TransmitEvent{
-			Type:            l.TransmitEventType(),
-			TransmitBlock:   ocr2keepers.BlockNumber(l.BlockNumber),
-			Confirmations:   latestBlock - l.BlockNumber,
-			TransactionHash: l.TxHash,
-			WorkID:          workID,
-			UpkeepID:        *upkeepId,
-			CheckBlock:      trigger.BlockNumber,
-		}
-		vals = append(vals, e)
-		visited[k] = e
+
+		transmitEvent.Confirmations = latestBlock - int64(transmitEvent.TransmitBlock)
+
+		vals = append(vals, transmitEvent)
+		visited[k] = transmitEvent
 	}
 
 	// adding to the cache only after we've processed all the logs
-	// the next time we call processLogs we don't want to return these logs
+	// the next time we call processLogs we don't want to process these logs
 	for k, e := range visited {
 		c.cache.add(k, e)
 	}