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-rw-r--r--tvix/store/src/proto.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/tvix/store/src/proto.rs b/tvix/store/src/proto.rs
index 706041d6a3c3..0b4e11bebf89 100644
--- a/tvix/store/src/proto.rs
+++ b/tvix/store/src/proto.rs
@@ -189,6 +189,8 @@ impl Directory {
                 .fold(0, |acc: u32, e| (acc + 1 + e.size) as u32)
     }
 
+    /// Calculates the digest of a Directory, which is the blake3 hash of a
+    /// Directory protobuf message, serialized in protobuf canonical form.
     pub fn digest(&self) -> Vec<u8> {
         let mut hasher = blake3::Hasher::new();