IStore

saveMessage(msg): Promise<void>;

getMessage(ref): Promise<StoredMessage | undefined>;

getMessagesByChat(chatId, limit?): Promise<StoredMessage[]>;

deleteMessage(ref): Promise<void>;

upsertChat(chat): Promise<void>;

getChat(chatId): Promise<StoredChat | undefined>;

listChats(): Promise<StoredChat[]>;

deleteChat(chatId): Promise<void>;

upsertContact(contact): Promise<void>;

getContact(userId): Promise<StoredContact | undefined>;

listContacts(): Promise<StoredContact[]>;

deleteContact(userId): Promise<void>;

getCursor?(key): Promise<string | undefined>;

setCursor?(key, value): Promise<void>;

getConversation(key): Promise<AIMessage[] | undefined>;

setConversation(key, messages): Promise<void>;

clearConversation(key): Promise<void>;

getCheckpoint(key): Promise<FlowCheckpoint | undefined>;

setCheckpoint(key, cp): Promise<void>;

clearCheckpoint(key): Promise<void>;

listCheckpoints(): Promise<[string, FlowCheckpoint][]>;

setCheckpointIf?(
   key, 
   cp, 
   expectedRevision
): Promise<boolean>;

clearCheckpointIf?(key, expectedRevision): Promise<boolean>;

getUserData?(
   userId, 
   namespace, 
   key
): Promise<UserDataEntry | undefined>;

setUserData?(entry): Promise<void>;

deleteUserData?(
   userId, 
   namespace?, 
   key?
): Promise<void>;

listUserData?(userId, namespace?): Promise<UserDataEntry[]>;

purgeExpiredUserData?(now?): Promise<number>;

start(): Promise<void>;

stop(): Promise<void>;