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In `@Sources/RealtimeV2/WebSocket/URLSessionWebSocket.swift`:
- Line 453: Update validatedCloseCode(_:) and
URLSessionWebSocketCloseValidationTests to allow only close codes supported by
URLSessionWebSocketTask.CloseCode, excluding application codes such as 3000. In
close(code:reason:), handle a failed CloseCode(rawValue:) conversion without
force-unwrapping before calling cancel(with:reason:).
In `@Sources/Storage/StorageApi.swift`:
- Line 21: Update isLegacySupabaseHost to require a hostname-label boundary by
checking supported suffixes with a preceding dot, while preserving the existing
useNewHostname condition. Add tests covering the apex supabase.co and unrelated
hosts such as not-supabase.co to ensure they are not rewritten.
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📒 Files selected for processing (17)
Sources/Auth/AuthClient.swiftSources/Auth/AuthError.swiftSources/Auth/Internal/PKCE.swiftSources/Helpers/HTTP/RetryRequestInterceptor.swiftSources/RealtimeV2/CallbackManager.swiftSources/RealtimeV2/RealtimeChannelV2.swiftSources/RealtimeV2/RealtimeClientV2.swiftSources/RealtimeV2/WebSocket/URLSessionWebSocket.swiftSources/Storage/StorageApi.swiftSources/Supabase/SupabaseClient.swiftTests/AuthTests/AuthErrorTests.swiftTests/HelpersTests/RetryRequestInterceptorTests.swiftTests/RealtimeTests/RealtimeClientOptionsTests.swiftTests/RealtimeTests/URLSessionWebSocketCloseValidationTests.swiftTests/StorageTests/StorageBucketAPITests.swiftTests/SupabaseTests/SupabaseClientStorageKeyTests.swiftV3_MIGRATION.md
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Every `fatalError`/`preconditionFailure`/`precondition`/`try!` reached from a value that varies at runtime is gone. A per-call redirect URL, a WebSocket close code, or a payload built from a server-issued token used to take the host app down. The dividing line is when the value is fixed, not who supplied it: - Fixed once, at construction — an initializer argument or a configuration field. These still trap. The value cannot change afterwards, so a bad one is a programmer error, and `precondition` reports it at the exact point it was introduced instead of burying it behind an unrelated failure later. `SupabaseClient.init` still traps on a `supabaseURL` with no host, `StorageApi` on a URL it cannot decompose, `RetryRequestInterceptor` on a backoff base below 2. - Varies at runtime — a per-call parameter, a system callback, a value derived from a server response. These never trap. They throw where the context already throws, and otherwise report and fall back. `AGENTS.md` gains a "When trapping is allowed" section so this is not re-litigated per site. ## Changes - **Auth** — a missing OAuth redirect scheme throws the new `AuthError.oauthFlowFailed(message:)`. `redirectTo` is a per-call parameter and the enclosing method already throws, so the error costs nothing. Same for an `ASWebAuthenticationSession` callback carrying neither a URL nor an error. PKCE's `data(using: .utf8)` becomes the non-failable `Data(_:)`. The two flow-type `precondition`s are deleted: the `switch` in `session(from:)` is their only caller and already proves them. - **RealtimeV2** — a non-`ws` scheme throws `WebSocketError.connection` rather than trapping, in a function that already throws. `close(code:reason:)` takes both values per call, so an out-of-range code or an overlong reason is reported and clamped, truncating on whole characters so the frame never carries a split UTF-8 scalar. The `try! JSONObject` on the join payload (which embeds a server-issued access token) reports and skips. `RealtimeClientV2.apikey` was assigned once and never read, so the `precondition` guarding it and its force unwrap both delete — the rest of the file already treats the apikey as optional. - **Storage** — the `try! NSRegularExpression` becomes three `hasSuffix` checks, which also stops `supabaseXco` matching as a platform host (`.` in the old pattern matched any character). - **Supabase** — the storage-key derivation moves into `defaultStorageKey(for:)`, fixing an index-out-of-range the old `host.split(separator: ".")[0]` hit on an empty host, where `split` returns an empty array. The construction-time check itself still traps. ## Out of scope - `Dependencies.swift:30` — a lifetime error, not a value at all, and the subscript has no value to return after reporting. - `PostgrestUpdate.swift:67,86` — `@available(*, unavailable)` getters, so calling one is already a compile error. BREAKING CHANGE: `AuthError` gains `oauthFlowFailed(message:)`, which breaks exhaustive switches over `AuthError`. See V3_MIGRATION.md. Fixes SDK-1793
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Removes every
fatalError,preconditionFailure,precondition, andtry!inSources/that is reached from a value which varies at runtime. A per-call redirect URL, a WebSocket close code, or a payload built from a server-issued token used to take the host app down.The rule this applies
The dividing line is when the value is fixed, not who supplied it.
packagetuning constant. These still trap. The value cannot change afterwards, so a bad one is a programmer error, andpreconditionreports it at the exact point it was introduced instead of burying it behind an unrelated failure later.SupabaseClient.initstill traps on asupabaseURLwith no host,StorageApion a URL it cannot decompose,RetryRequestInterceptoron a backoff base below 2.A value being "user input" is not on its own a reason to avoid trapping —
supabaseURLis user input and traps. A value being dynamic is.AGENTS.mdgains a "When trapping is allowed" section so this is not re-litigated per site.Changes
AuthError.oauthFlowFailed(message:).redirectTois a parameter of the sign-in method (falling back toAuthClient.Configuration.redirectToURL), and the enclosing method already throws, so the error costs nothing. Same for anASWebAuthenticationSessioncallback carrying neither a URL nor an error. PKCE'sdata(using: .utf8)becomes the non-failableData(_:). The two flow-typepreconditions are deleted: theswitchinsession(from:)is their only caller and already proves them.wsscheme throwsWebSocketError.connectionrather than trapping, in a function that already throws.close(code:reason:)takes both values per call, so an out-of-range code or an overlong reason is reported and clamped, truncating on whole characters so the frame never carries a split UTF-8 scalar. Thetry! JSONObjecton the join payload — which embeds a server-issued access token — reports and skips.RealtimeClientV2.apikeywas assigned once and never read, so thepreconditionguarding it and its force unwrap both delete; the rest of the file already treats the apikey as optional.CloseCode(rawValue: code)!becomes?? .normalClosure.CloseCodeis imported from Objective-C as a non-exhaustiveNS_ENUM, soinit(rawValue:)accepts anyIntand preserves it — an application code like 4001 goes out as 4001, verified across 1000/3000/4000/4001/4999 and pinned by a test. The fallback is unreachable; it is there so the close path contains no force unwrap.try! NSRegularExpressionbecomes threehasSuffixchecks against.supabase.co/.in/.red. The leading dot fixes a pre-existing bug the old regex shared:supabase.(co|in|red)$matched any host merely ending in the apex, somysupabase.cowas silently rewritten tomystorage.supabase.co— pointing requests at a domain the caller does not control. The bare apexsupabase.cois excluded too; it is not a project host. The substitution moved to the same boundary (.supabase.->.storage.supabase.) so the check and the rewrite agree. Also stopssupabaseXcomatching, since.in the old pattern matched any character.defaultStorageKey(for:). That fixes an index-out-of-range the oldhost.split(separator: ".")[0]hit on an empty host, wheresplitreturns an empty array — a second crash on the same line as thepreconditionFailure. The construction-time check itself still traps.Out of scope
Dependencies.swift:30— fires whenDependencies[clientID]is read afterAuthClient.deinitremoved the entry. A lifetime error, not a value, and the subscript has nothing to return after reporting. Worth its own issue ifAuthMFA/AuthAdminoutliving their client is a real pattern.PostgrestUpdate.swift:67,86—@available(*, unavailable)getters, so calling one is already a compile error.Breaking change
AuthErrorgainsoauthFlowFailed(message:), which breaks exhaustive switches overAuthError.V3_MIGRATION.mdhas the section, and the entry listingAuthError.invalidRedirectSchemeas "removed with no replacement" is corrected — the condition is client-side, so it now maps to the new case.Testing
swift test— 1455 tests in 151 suites passed, 12 known issues (baseline: 1442, same 12)PLATFORM=MACOS XCODEBUILD_ARGUMENT=test ./scripts/xcodebuild.sh—** TEST SUCCEEDED **./scripts/format.sh— no diff./scripts/spell-check.sh— 414 files, 0 issuesFixes SDK-1793