Add flags.

cmd/geth/config.go

@@ -273,13 +273,15 @@ func makeFullNode(ctx *cli.Context) (*node.Node, ethapi.Backend) {
 			}
 		}
 		p := statediff.Config{
-			IndexerConfig:   indexerConfig,
-			ID:              nodeID,
-			ClientName:      clientName,
-			Context:         context.Background(),
-			EnableWriteLoop: ctx.Bool(utils.StateDiffWritingFlag.Name),
-			NumWorkers:      ctx.Uint(utils.StateDiffWorkersFlag.Name),
-			WaitForSync:     ctx.Bool(utils.StateDiffWaitForSync.Name),
+			IndexerConfig:           indexerConfig,
+			ID:                      nodeID,
+			ClientName:              clientName,
+			Context:                 context.Background(),
+			EnableWriteLoop:         ctx.Bool(utils.StateDiffWritingFlag.Name),
+			NumWorkers:              ctx.Uint(utils.StateDiffWorkersFlag.Name),
+			WaitForSync:             ctx.Bool(utils.StateDiffWaitForSync.Name),
+			BackfillCheckPastBlocks: ctx.Uint64(utils.StateDiffBackfillCheckPastBlocks.Name),
+			BackfillMaxHeadGap:      ctx.Uint64(utils.StateDiffBackfillMaxHeadGap.Name),
 		}
 		utils.RegisterStateDiffService(stack, eth, &cfg.Eth, p, backend)
 	}

cmd/geth/main.go

@@ -176,6 +176,8 @@ var (
 		utils.StateDiffUpsert,
 		utils.StateDiffLogStatements,
 		utils.StateDiffCopyFrom,
+		utils.StateDiffBackfillCheckPastBlocks,
+		utils.StateDiffBackfillMaxHeadGap,
 		configFileFlag,
 	}, utils.NetworkFlags, utils.DatabasePathFlags)
 

cmd/utils/flags.go

@@ -1120,6 +1120,16 @@ Please note that --` + MetricsHTTPFlag.Name + ` must be set to start the server.
 		Name:  "statediff.waitforsync",
 		Usage: "Should the statediff service wait for geth to catch up to the head of the chain?",
 	}
+	StateDiffBackfillCheckPastBlocks = &cli.Uint64Flag{
+		Name:  "statediff.backfillcheckpastblocks",
+		Usage: "The number of blocks behind the startup statediff position to check (and fill) for gaps when head tracking.",
+		Value: 7200,
+	}
+	StateDiffBackfillMaxHeadGap = &cli.Uint64Flag{
+		Name:  "statediff.backfillmaxheadgap",
+		Usage: "The maximum gap between the startup statediff and startup head positions that can be backfilled.",
+		Value: 7200,
+	}
 )
 
 var (