Always re-index latest Cadence block

Author: m-Peter

bootstrap/bootstrap.go

@@ -143,23 +143,15 @@ func (b *Bootstrap) StartEventIngestion(ctx context.Context) error {
 
 	chainID := b.config.FlowNetworkID
 
-	// the event subscriber takes the first block to sync from the Access node, which is the block
-	// after the latest cadence block
-	nextCadenceHeight := latestCadenceHeight + 1
-	// Special case when using a local Emulator as Access Node. The Emulator
-	// always starts at block height 0, so if we try to subscribe at block
-	// height 1, we'll get an error, as it doesn't exist.
-	if latestCadenceHeight == config.EmulatorInitCadenceHeight {
-		nextCadenceHeight -= 1
-	}
-
-	// create event subscriber
+	// Create EVM event subscriber
+	// Event ingestion & tx replay is idempotent, so we use the
+	// `latestCadenceHeight` to be on the safe side.
 	subscriber := ingestion.NewRPCEventSubscriber(
 		b.logger,
 		b.client,
 		chainID,
 		b.keystore,
-		nextCadenceHeight,
+		latestCadenceHeight,
 	)
 
 	callTracerCollector, err := replayer.NewCallTracerCollector(