From b3d1d449fd262a480aeb0144300d8f54b5c6b033 Mon Sep 17 00:00:00 2001
From: Martin Boehm <martin.boehm@1mbsoftware.net>
Date: Thu, 1 Mar 2018 20:20:50 +0100
Subject: [PATCH] Fix minimum sync height

---
 blockbook.go | 2 +-
 db/sync.go   | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/blockbook.go b/blockbook.go
index cffe57fa..9d62cd89 100644
--- a/blockbook.go
+++ b/blockbook.go
@@ -140,7 +140,7 @@ func main() {
 		return
 	}
 
-	syncWorker, err = db.NewSyncWorker(index, chain, *syncWorkers, *syncChunk, uint32(*blockFrom), *dryRun, chanOsSignal)
+	syncWorker, err = db.NewSyncWorker(index, chain, *syncWorkers, *syncChunk, *blockFrom, *dryRun, chanOsSignal)
 	if err != nil {
 		glog.Fatalf("NewSyncWorker %v", err)
 	}
diff --git a/db/sync.go b/db/sync.go
index b96cb572..6b96962b 100644
--- a/db/sync.go
+++ b/db/sync.go
@@ -21,14 +21,17 @@ type SyncWorker struct {
 }
 
 // NewSyncWorker creates new SyncWorker and returns its handle
-func NewSyncWorker(db *RocksDB, chain *bchain.BitcoinRPC, syncWorkers, syncChunk int, minStartHeight uint32, dryRun bool, chanOsSignal chan os.Signal) (*SyncWorker, error) {
+func NewSyncWorker(db *RocksDB, chain *bchain.BitcoinRPC, syncWorkers, syncChunk int, minStartHeight int, dryRun bool, chanOsSignal chan os.Signal) (*SyncWorker, error) {
+	if minStartHeight < 0 {
+		minStartHeight = 0
+	}
 	return &SyncWorker{
 		db:           db,
 		chain:        chain,
 		syncWorkers:  syncWorkers,
 		syncChunk:    syncChunk,
 		dryRun:       dryRun,
-		startHeight:  minStartHeight,
+		startHeight:  uint32(minStartHeight),
 		chanOsSignal: chanOsSignal,
 	}, nil
 }