pub fn daemon_marker(data_dir: &Path) -> Result<Option<&'static str>>Expand description
The daemon-owned file that marks data_dir as a node’s, if any.
Checks the whole DAEMON_STORE_FILES set rather than
NODE_BUYER_DB_FILE alone, because the buyer store is exactly the file an
operator recovering from a reset deletes or loses. A directory whose
buyer.redb is gone but whose lanes.redb remains is still a node’s, and
treating it as a client’s is how a second deposit gets escrowed into a store
the daemon never reads.
Each file is checked with symlink_metadata, not Path::exists, which
collapses every stat error to false. Only NotFound reads as “absent”. Any
other stat error (a permission denial, a loop, a transient I/O fault) leaves
the owner unknown, and this returns it: the callers gate refusals that move
USDC on this answer, so an unknown owner must refuse rather than pass as a
client’s directory (#2086).
§Errors
The first stat error other than NotFound, with the path it concerns.