diff --git a/.gitignore b/.gitignore
index 5d7a86c..385c906 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 .idea/
+.vscode/
 ipld-eth-state-snapshot
+mocks/
diff --git a/Makefile b/Makefile
index eebd422..b612d53 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 MOCKS_DIR = $(CURDIR)/mocks
 mockgen_cmd=mockgen
 
-.PHONY: mocks
+.PHONY: mocks test
 
 mocks: mocks/snapshot/publisher.go
 
@@ -14,3 +14,6 @@ clean:
 build:
 	go fmt ./...
 	go build
+
+test: mocks
+	go clean -testcache && go test -v ./...
diff --git a/README.md b/README.md
index ca4744e..ac67170 100644
--- a/README.md
+++ b/README.md
@@ -52,3 +52,8 @@ Config format:
     chainID = "1" # $ETH_CHAIN_ID
     genesisBlock = "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3" # $ETH_GENESIS_BLOCK
 ```
+
+## Tests
+
+* Install [mockgen](https://github.com/golang/mock#installation)
+* `make test`
diff --git a/cmd/stateSnapshot.go b/cmd/stateSnapshot.go
index c44d84e..cc4e88a 100644
--- a/cmd/stateSnapshot.go
+++ b/cmd/stateSnapshot.go
@@ -44,7 +44,7 @@ func stateSnapshot() {
 	mode := snapshot.SnapshotMode(modeStr)
 	config, err := snapshot.NewConfig(mode)
 	if err != nil {
-		logWithCommand.Fatal("unable to initialize config: %v", err)
+		logWithCommand.Fatalf("unable to initialize config: %v", err)
 	}
 	logWithCommand.Infof("opening levelDB and ancient data at %s and %s",
 		config.Eth.LevelDBPath, config.Eth.AncientDBPath)
diff --git a/pkg/snapshot/service.go b/pkg/snapshot/service.go
index 3e269a9..be7d903 100644
--- a/pkg/snapshot/service.go
+++ b/pkg/snapshot/service.go
@@ -81,6 +81,8 @@ type SnapshotParams struct {
 }
 
 func (s *Service) CreateSnapshot(params SnapshotParams) error {
+	log.Infof("createSnapshot BEGIN %v", params)
+
 	// extract header from lvldb and publish to PG-IPFS
 	// hold onto the headerID so that we can link the state nodes to this header
 	log.Infof("Creating snapshot at height %d", params.Height)
@@ -92,12 +94,16 @@ func (s *Service) CreateSnapshot(params SnapshotParams) error {
 
 	log.Infof("head hash: %s head height: %d", hash.Hex(), params.Height)
 
+	log.Infof("publish header")
 	err := s.ipfsPublisher.PublishHeader(header)
 	if err != nil {
 		return err
 	}
 
+	log.Infof("opening trie...")
 	tree, err := s.stateDB.OpenTrie(header.Root)
+	log.Infof("opened trie")
+
 	if err != nil {
 		return err
 	}
@@ -106,13 +112,19 @@ func (s *Service) CreateSnapshot(params SnapshotParams) error {
 	go s.tracker.run()
 	go s.tracker.captureSignal()
 
+	log.Infof("after goroutines start")
+
 	var iters []trie.NodeIterator
 	// attempt to restore from recovery file if it exists
+	log.Infof("restoring iterators from recovery file...")
 	iters, err = s.tracker.restore(tree)
+
 	if err != nil {
+		log.Errorf("restore error: %s", err.Error())
 		return err
 	}
 	if iters != nil {
+		log.Infof("restored iterators; count: %d", len(iters))
 		if params.Workers < uint(len(iters)) {
 			return fmt.Errorf(
 				"number of recovered workers (%d) is greater than number configured (%d)",
@@ -120,12 +132,17 @@ func (s *Service) CreateSnapshot(params SnapshotParams) error {
 			)
 		}
 	} else { // nothing to restore
+		log.Infof("no iterators to restore")
 		if params.Workers > 1 {
+			log.Infof("creating %d subtrie iterators...", params.Workers)
 			iters = iter.SubtrieIterators(tree, params.Workers)
+			log.Infof("created %d subtrie iterators", params.Workers)
 		} else {
+			log.Infof("creating node iterators")
 			iters = []trie.NodeIterator{tree.NodeIterator(nil)}
 		}
 		for i, it := range iters {
+			log.Infof("tracked iterator %d", i)
 			iters[i] = s.tracker.tracked(it)
 		}
 	}
@@ -133,10 +150,12 @@ func (s *Service) CreateSnapshot(params SnapshotParams) error {
 	defer func() {
 		err := s.tracker.haltAndDump()
 		if err != nil {
-			log.Error("failed to write recovery file: ", err)
+			log.Errorf("failed to write recovery file: %v", err)
 		}
 	}()
 
+	log.Infof("num iters %d", len(iters))
+
 	if len(iters) > 0 {
 		return s.createSnapshotAsync(iters, headerID)
 	} else {