Required. The relative resource name of the iOS app, in the format:
projects/{project_number}/apps/{app_id}
If necessary, the project_number element can be replaced with the project ID of the Firebase project. Learn more about using project identifiers in Google's AIP 2510 standard.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-26 UTC."],[],[],null,["# Method: oauthClients.generateAppAttestChallenge\n\nGenerates a challenge that protects the integrity of an immediately following call to [oauthClients.exchangeAppAttestAttestation](/docs/reference/appcheck/rest/v1/projects.apps/exchangeAppAttestAttestation#google.firebase.appcheck.v1.TokenExchangeService.ExchangeAppAttestAttestation) or [oauthClients.exchangeAppAttestAssertion](/docs/reference/appcheck/rest/v1/projects.apps/exchangeAppAttestAssertion#google.firebase.appcheck.v1.TokenExchangeService.ExchangeAppAttestAssertion). A challenge should not be reused for multiple calls.\n\n### HTTP request\n\n`POST https://firebaseappcheck.googleapis.com/v1/{app=oauthClients/*}:generateAppAttestChallenge`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n| Parameters ||\n|-------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `app` | `string` Required. The relative resource name of the iOS app, in the format: projects/{project_number}/apps/{app_id} If necessary, the `project_number` element can be replaced with the project ID of the Firebase project. Learn more about using project identifiers in Google's [AIP 2510](https://google.aip.dev/cloud/2510) standard. |\n\n### Request body\n\nThe request body must be empty.\n\n### Response body\n\nIf successful, the response body contains an instance of [GenerateAppAttestChallengeResponse](/docs/reference/appcheck/rest/v1/GenerateAppAttestChallengeResponse).\n\n### Authorization scopes\n\nRequires one of the following OAuth scopes:\n\n- `https://www.googleapis.com/auth/cloud-platform`\n- `https://www.googleapis.com/auth/firebase`\n\nFor more information, see the [Authentication Overview](https://cloud.google.com/docs/authentication/)."]]