commit inicial do projeto

internal/storage/snapshot.go

@@ -0,0 +1,24 @@
+package storage
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strconv"
+)
+
+const snapshotFile = "state_snapshot.txt"
+
+func (bs *BlockStore) SetSnapshotHeight(index uint64) error {
+	file := filepath.Join(bs.Path, snapshotFile)
+	return os.WriteFile(file, []byte(strconv.FormatUint(index, 10)), 0644)
+}
+
+func (bs *BlockStore) GetSnapshotHeight() (uint64, error) {
+	file := filepath.Join(bs.Path, snapshotFile)
+	data, err := os.ReadFile(file)
+	if err != nil {
+		return 0, errors.New("nenhum snapshot salvo")
+	}
+	return strconv.ParseUint(string(data), 10, 64)
+}