1 files changed, 21 insertions, 0 deletions
diff --git a/pkg/types/util.go b/pkg/types/util.go
new file mode 100644
index 0000000..3cd7dfa
--- /dev/null
+++ b/pkg/types/util.go
@@ -0,0 +1,21 @@
+package types
+
+import (
+	"crypto/sha256"
+)
+
+const (
+	LeafHashPrefix = 0x00
+)
+
+func Hash(buf []byte) *[HashSize]byte {
+	var ret [HashSize]byte
+	hash := sha256.New()
+	hash.Write(buf)
+	copy(ret[:], hash.Sum(nil))
+	return &ret
+}
+
+func HashLeaf(buf []byte) *[HashSize]byte {
+	return Hash(append([]byte{LeafHashPrefix}, buf...))
+}