diff options
Diffstat (limited to 'core/storage.go')
| -rw-r--r-- | core/storage.go | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/core/storage.go b/core/storage.go index 7475bef..8c76c52 100644 --- a/core/storage.go +++ b/core/storage.go @@ -6,6 +6,7 @@ import ( "encoding/json" "fmt" "os" + "strings" bolt "go.etcd.io/bbolt" ) @@ -131,3 +132,14 @@ func GetNode(checksum string, db *bolt.DB) (Node, error) { } return node, err } + +func VerifyNode(node Node, nextNode Node) error { + nodeHash, err := calculateStringHash(fmt.Sprintf("%d%d%s%s", node.BlockStart, node.BlockEnd, node.BlockSum, node.PrevNodeSum)) + if err != nil { + return err + } + if strings.Compare(nodeHash, nextNode.PrevNodeSum) != 0 { + return fmt.Errorf("Node %s is not valid!", node.PrevNodeSum) + } + return nil +} |