add rekeys, refounding and dissolution

crates/concord/src/list.rs

@@ -43,7 +43,6 @@ impl fmt::Display for ListError {
 
 impl std::error::Error for ListError {}
 
-/// A membership's keys.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct JoinMaterial {
     pub community_id: CommunityId,
@@ -83,7 +82,6 @@ pub struct Tombstone {
     pub extra: Extra,
 }
 
-/// A member's own memberships.
 #[derive(Debug, Clone, Default, PartialEq, Serialize, Deserialize)]
 pub struct CommunityList {
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
@@ -242,7 +240,7 @@ fn pick<'a>(
     held
 }
 
-fn union(into: &mut Extra, other: Extra) {
+pub(crate) fn union(into: &mut Extra, other: Extra) {
     for (key, value) in other {
         let replace = match into.get(&key) {
             Some(existing) => canonical(&value) < canonical(existing),
@@ -255,7 +253,7 @@ fn union(into: &mut Extra, other: Extra) {
     }
 }
 
-fn canonical<T: Serialize>(value: &T) -> String {
+pub(crate) fn canonical<T: Serialize>(value: &T) -> String {
     serde_json::to_string(value).unwrap_or_default()
 }