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ndb/txn: make transactions failable

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Since there may be situations where we close and re-open the database,
we need to make sure transactions fail when the database is not open.

Make NdbTxn an init?() constructor and check for ndb.closed. If it's
closed, then fail transaction construction.

This fixes crashes during high database activity when switching from
background to foreground and vice-versa.

Fixes: da2bdad18d ("nostrdb: close database when backgrounded")
This commit is contained in:
William Casarin
2023-12-12 12:45:56 -08:00
parent 227734d286
commit bfad2ab42d
42 changed files with 126 additions and 107 deletions
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2
damus/Views/Notifications/NotificationsView.swift
View File

@@ -61,7 +61,7 @@ struct NotificationsView: View {
var mystery: some View {
let profile_txn = state.profiles.lookup(id: state.pubkey)
let profile = profile_txn.unsafeUnownedValue
let profile = profile_txn?.unsafeUnownedValue
return VStack(spacing: 20) {
Text("Wake up, \(Profile.displayName(profile: profile, pubkey: state.pubkey).displayName.truncate(maxLength: 50))", comment: "Text telling the user to wake up, where the argument is their display name.")
Text("You are dreaming...", comment: "Text telling the user that they are dreaming.")