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Add FirebaseAIConfig support #15099

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@daymxn daymxn commented Jul 9, 2025

Per b/430576238,

This adds support for the FirebaseAIConfig struct, alongside the AppCheckOptions struct. The limitedUseTokens aspect is implemented, and has been documented as well.

This feature still needs to go through API review, so it should not be merged yet.

Tests will also need to be added once the change it approved.

e: Note that no changelog entry is added yet, as I'm unsure when this will be merged. But a changelog entry will need to be added before it is merged.

@daymxn daymxn requested a review from andrewheard July 9, 2025 17:16
@daymxn daymxn self-assigned this Jul 9, 2025
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code: .appCheckTokenFetchFailed,
"Missing getLimitedUseToken() function, but requireLimitedUseTokens was enabled."
)
// falls back to standard token
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Should we fall back or throw an error here? I feel like throwing an error might make more sense, since the developer is explicitly opting in to using limitedUseTokens (especially considering the require prefix). I used a log for connivence first though, wdyt @andrewheard?

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⚠️ Did you forget to add a changelog entry? (Add #no-changelog to the PR description to silence this warning.)

Generated by 🚫 Danger

@@ -86,13 +87,14 @@ public final class GenerativeModel: Sendable {
toolConfig: ToolConfig? = nil,
systemInstruction: ModelContent? = nil,
requestOptions: RequestOptions,
urlSession: URLSession = GenAIURLSession.default) {
urlSession: URLSession = GenAIURLSession.default, aiConfig: FirebaseAIConfig) {
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I expected this to go on a new line, lets see if CI complains. If it doesn't, I'll just fix it manually.

@@ -30,9 +30,12 @@ struct GenerativeAIService {

private let urlSession: URLSession

init(firebaseInfo: FirebaseInfo, urlSession: URLSession) {
private let aiConfig: FirebaseAIConfig
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This could also be propagated down via FirebaseInfo, but I wasn't sure if that was desirable. cc @andrewheard

///
/// Can be set when creating a ``FirebaseAI.Config``.
@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
public struct AppCheckOptions: Sendable, Hashable, Encodable {
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Sendable conformance looks good. Why the Hashable and Encodable conformance?

)
}

/// Class to enable FirebaseAI to register via the Objective-C based Firebase component system
/// to include FirebaseAI in the userAgent.
@objc(FIRVertexAIComponent) class FirebaseVertexAIComponent: NSObject {}

/// Configuration options for ``FirebaseAI``, which persists across all models.
@available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
public struct Config: Sendable, Hashable, Encodable {
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Same here w.r.t. the Hashable and Encodableconformances.

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