use Automerge as Document instead of AutoCommit

This allows a lot of operations to drop mut.

1 files changed, 2 insertions, 3 deletions

diff --git a/src/swarm/bootstrap.rs b/src/swarm/bootstrap.rs
index d2bbe24..848201e 100644
--- a/src/swarm/bootstrap.rs
+++ b/src/swarm/bootstrap.rs
@@ -281,7 +281,7 @@ pub(crate) fn starting_document(
 
 /// The swarm and epoch `doc` is on.
 fn identify(
-    mut doc: Document,
+    doc: Document,
     origin: Origin,
     earlier_actors: Vec<ActorId>,
 ) -> Result<StartingDocument> {
@@ -289,8 +289,7 @@ fn identify(
     let Some(swarm_id) = read_swarm_id(&doc) else {
         bail!("{what} names no swarm (no _continuum/swarm); it predates swarm IDs in documents");
     };
-    let epoch =
-        snapshot::epoch_of(&mut doc).map_err(|reason| anyhow::anyhow!("{what}: {reason}"))?;
+    let epoch = snapshot::epoch_of(&doc).map_err(|reason| anyhow::anyhow!("{what}: {reason}"))?;
     Ok(StartingDocument {
         doc,
         epoch,