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feat: refuse stale character saves with a save generation

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Every character gets a save generation in charxml. A world bumps it when it loads the character for
play, and every save from that world only goes through while the stored generation is still the
one it loaded or last saved (and moves it on). Dashboard edits, restores and maintenance writes bump
it too. A world that lost the character to another world (a disconnect noticed late, a zone
transfer, an instance migration) or to a dashboard edit can no longer overwrite the newer data: the
save is refused, logged and audited as stale_save_refused, the world stops saving that character
and a player still connected to it is disconnected with the save failure reason so they reload.

Fixes #639

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-26 19:10:16 -05:00
parent 17689cd663
commit 341ce89a6a
14 changed files with 280 additions and 6 deletions
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3
dDatabase/GameDatabase/MySQL/MySQLDatabase.h
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@@ -75,6 +75,9 @@ public:
std::optional<IAccounts::Info> GetAccountInfo(const std::string_view username) override;
void InsertNewCharacter(const ICharInfo::Info info) override;
void InsertCharacterXml(const LWOOBJID accountId, const std::string_view lxfml) override;
std::optional<ICharXml::CharacterXml> ClaimCharacterXml(const LWOOBJID charId) override;
bool SaveCharacterXml(const LWOOBJID charId, const std::string_view lxfml, const uint64_t generation) override;
uint64_t GetCharacterSaveGeneration(const LWOOBJID charId) override;
std::string GetCharactersTable(uint32_t start, uint32_t length, const std::string_view search = "", uint32_t orderColumn = 0, bool orderAsc = true) override;
std::vector<LWOOBJID> GetAccountCharacterIds(LWOOBJID accountId) override;
void DeleteCharacter(const LWOOBJID characterId) override;