Keep friend bots below the Xbox friend limit - #43
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Xbox caps an account at 1000 friends. Full bots failed every pending accept with an unreadable 400, and inactivity expiry did not free slots because removed players who still followed the bot were followed back. - Replace friendSync.expiry with friendSync.cleanup: inactiveDays and maxFriends (0 = off). maxFriends removes the least recently seen friends to make room for waiting requests, and also runs when Xbox reports the list full. configVersion 4 migrates expiry and leaves maxFriends off. - End removed friendships both ways (RemoveFriend + RemoveFollower) and never follow back a removed friend while their follow is being dropped. - Split refused bulk accepts down to single people, keep later batches going, classify 1028 as list full, decline restricted requests, and retry refused requests later instead of every pass. - Announce and invite an accepted friend once, after they show up on the friend list. - Never remove the bot's own accounts; key player history by account, migrating the old flat file; write it with fsync and a unique temp file, and move a corrupt file aside. - Resubscribe the social RTA feed with backoff after a loss. - Honour Retry-After for restricted-follower removals and presence updates, report friends against the 1000 limit at startup, and send gallery uploads with a Content-Length. - Pin go-xsapi to the fork commit that keeps uncoded error bodies, returns failed bulk users, and reports presence Retry-After.
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughFriend sync now uses configurable cleanup limits, account-scoped history, and structured pending-request outcomes. Social subscriptions retry after failures or loss. Gallery uploads stream files with a known content length. ChangesFriend Sync Cleanup
Social Subscription Retries
Gallery Upload Request
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant FriendSyncer
participant FriendClient
participant HistoryStore
FriendSyncer->>FriendClient: Fetch friends and pending requests
FriendClient-->>FriendSyncer: Return friend list and request outcomes
FriendSyncer->>HistoryStore: Read account history and mark removals
FriendSyncer->>FriendClient: Remove inactive or over-limit relationships
FriendSyncer->>HistoryStore: Update or restore removal history
sequenceDiagram
participant SubscriptionLoop
participant SocialSubscriber
participant SyncTrigger
SubscriptionLoop->>SocialSubscriber: Subscribe
SocialSubscriber-->>SubscriptionLoop: Report subscription result
SocialSubscriber-->>SubscriptionLoop: Notify subscription loss
SubscriptionLoop->>SocialSubscriber: Release registration
SubscriptionLoop->>SocialSubscriber: Retry subscription
SubscriptionLoop->>SyncTrigger: Queue catch-up sync after reconnect
Merge Risk: ⚪ Minimal · up to No actionable merge-blocking risk remains from the supplied evidence. The change is ready for normal merge checks. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to When capacity cleanup is enabled, incoming friend requests can cause the bot to remove existing friends, even before those requests are accepted. The impact is confined to the affected bot account, but a large request queue could cause broad, lasting changes to its friend list. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
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✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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A full-list response could come from a count mismatch or the other person's list. Forcing removals for it on every pass could drain the friend list, so only the maxFriends rule removes friends.
The lunar branch carries the social/presence changes this PR needs plus the other pending go-xsapi fixes, so every broadcaster PR pins one commit.
go-xsapi now retries throttled presence updates itself, so the heartbeat loop goes back to its fixed retry delay.
A friend whose follower side could not be removed was only remembered in memory for a day, so a restart or the expiry let auto-follow recreate the friendship. The pending removal is now kept in the account's history until the follower is gone, and a new accepted request clears it. Upgrading a flat history file copied it only to accounts read before the first write, so a restart could drop another account's clocks. The broadcaster now reads every own account's history before syncing starts.
RemoveFriend only ends a friendship or pending request, so for someone the account follows one way it returned 404, which was treated as success: the follow kept its slot while cleanup logged a removal. Cleanup now unfollows one-way follows, ends friendships with RemoveFriend (unfollowing when Xbox has no friendship record), and no longer hides a RemoveFriend 404.
…y saves Pending follower removals were only read when cleanup was enabled, and the config only created a history store then, so turning cleanup off let auto-follow re-add a player whose removal was still pending. Friend sync now always has history and always finishes pending removals. A failed history write left the change only in memory, so a later no-op update never retried it. The store now stays dirty until a save succeeds.
…s's adds Xbox's 1028 can mean the requester's list is full. A refused batch is now split like any other refusal, and a request refused as list full counts as the bot's own list being full only when the bot is at the Xbox limit; otherwise just that request is retried later. The error itself never causes removals. Cleanup now counts friends added by this pass's follow-backs and accepts that the pass's snapshot does not show yet, so maxFriends holds within the pass.
…usals The pending-removal mark is now saved before the friendship is ended, and undone if Xbox refuses, so a crash in between cannot let auto-follow restore the friendship. A mark left on a friend whose removal never happened is dropped on the next cleanup pass. Bulk accepts are split only for a 400 without a code or a known per-person or bulk-size code (1011, 1015, 1028, 1039, 1049, 1050). Other client errors fail the request once and back off accepts.
A later pass that removes friends now clears the hour-long accept backoff and runs another pass soon, so waiting requests are not blocked for the rest of the hour.
# Conflicts: # config_file.go # config_file_test.go # deployments/pterodactyl/egg-go-mcxboxbroadcast.json # friends.go # player_history.go # pterodactyl_test.go
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In `@friends.go`:
- Around line 123-135: Update acceptFriends so code 1028 does not trigger
recursive batch splitting when the account’s own friend list is already at
XboxFriendLimit; stop or skip the accept pass until cleanup makes room. Preserve
splitting to isolate an individual requester’s refusal when the account is below
the limit, and retain the existing handling for other refusal codes.
In `@gallery.go`:
- Line 149: Update the upload flow around os.ReadFile to open the image file and
use the file handle as the request body instead of buffering its contents; set
req.ContentLength from the file’s stat size and close the file after the request
completes.
In `@player_history_test.go`:
- Around line 152-163: Update TestFileHistoryStoreRetriesFailedSave to skip when
running on Windows or as root, where the read-only directory may still allow
writes; add the runtime import needed to check the operating system. Keep the
existing permission-based test behavior for other environments.
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📒 Files selected for processing (23)
README.mdbroadcaster.gobroadcaster_test.goconfig.example.ymlconfig.goconfig_file.goconfig_file_test.goconstants.godeployments/pterodactyl/egg-go-mcxboxbroadcast.jsonfriend_sync.gofriend_sync_rate_test.gofriend_sync_test.gofriends.gofriends_test.gogallery.gogallery_test.gointegration_clients_test.goplayer_history.goplayer_history_test.gopterodactyl_test.gorelay.gosocial_subscription.gosocial_subscription_test.go
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Each pass now records how many more people the account can follow and the next accept tries at most that many requests. A full list no longer sends bulk accepts that Xbox refuses with 1028 and that were split down to single requests; this replaces the hourly full-list backoff. Room made by cleanup or unfollows is used on the next pass. Gallery uploads stream the file with an explicit Content-Length instead of reading it into memory. The failed-save history test skips where a read-only directory still accepts writes (root, Windows).
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Summary
Xbox allows an account at most 1000 friends, with unlimited followers. Bots at the cap stopped accepting new players. Every pending accept failed with an opaque
400, and the bot retried it on every tick. Inactivity expiry didn't free slots either: a removed player who still followed the bot got followed back into the freed slot. This PR adds a simple capacity rule, makes removals stick, and makes the accept path recover from failures.Changes
Friend list capacity (config change)
friendSync.expiryis replaced byfriendSync.cleanup:maxFriendsis checked on every sync. The count includes friends added earlier in the same pass. When friends plus waiting requests would go over it, the bot removes the friends it has seen least recently to make exactly that much room. If Xbox had reported the list as full, the bot runs another pass right away to accept the waiting requests. A full-list error alone never removes friends belowmaxFriends, so a count mismatch with Xbox can't drain the list. In that case accepts back off for an hour, as before.maxFriendsmust be between 0 and 1000 (XboxFriendLimit). A value of 1000 loads, with a note that it leaves no room for new requests.FriendSyncConfig.Cleanup(FriendCleanupConfig) replacesExpiryEnabled,ExpiryDaysandExpiryCheck.Removals that stick
RemoveFriendand thenRemoveFollower, so the friendship ends in both directions. Before,RemoveMutualFollowremoved only the bot's follow. The player kept following the bot and was followed back.RemoveFrienddoesn't touch a one-way follow. ARemoveFriend404 is no longer counted as a freed slot. When Xbox has no friendship record for a mutual follow, the bot unfollows instead.RemoveFollowerfails, a later pass retries it, and this survives a restart or a crash. A new friend request from that player clears it. Pending removals are finished even if cleanup is later turned off, so friend sync always keeps the history file.Accepting friend requests
400without a code, or codes 1011, 1015, 1028, 1039, 1049 or 1050. Later batches still run. Any other client error fails the request once, and accepts back off for 15 minutes.maxFriendsmakes room. Otherwise only that request is retried later. The error alone never removes anyone.Bot accounts and history
<path>.corrupt-<unix>, and the store starts fresh.Smaller fixes
friends=N/1000(people the bot follows) andfollowers=M.Content-Lengthinstead of a chunked body.Config migration
configVersiongoes to 5. Migration step 5 runs after main's step 4, on the raw document before strict decoding, so oldfriendSync.expirykeys still load.friendSync.expiryand nofriendSync.cleanupis migrated the way the old loader read it:enabled: falsebecomesinactiveDays: 0daysbecomesinactiveDayscheckbecomesintervalhistoryPathis keptmaxFriends: 0, so existing deployments behave the same until they opt in. New default configs, the example config and the Pterodactyl installer useinactiveDays: 15andmaxFriends: 950.configVersionis saved again whenever a migration step changed it.cleanup.player_history.json({xuid: unix}) keeps working. At startup the broadcaster reads every one of its accounts, so each account starts from a copy and existing clocks are kept. The next write saves the per-account layout.Dependency
This PR bumps
github.com/df-mc/go-xsapi/v2to upstream58a99d3(v2.0.4-0.20260925130556-58a99d3044b7). That version includes df-mc/go-xsapi#50, which this PR needs:ResponseError.Bodykeeps uncoded error bodies.BulkFriendsResult{Updated, Failed}.There is no
replacefor go-xsapi.Not verified live
These tests use a fake people service. It models the observed Xbox behaviour: ending a friendship leaves the other person's follow. No test ran against the live Xbox services. After rollout, check the bot's logs:
reason=inactiveorreason=over_capacityValidation
New regression tests:
maxFriendsis set, backs off when it isn't, and never removes friends belowmaxFriendsmaxFriendsis unfollowedmaxFriendsSummary by CodeRabbit