The duration from the time this challenge is minted until its expiration. This field is intended to ease client-side token management, since the client may have clock skew, but is still able to accurately measure a duration.
A duration in seconds with up to nine fractional digits, ending with 's'. Example: "3.5s".
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-09-26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,["# GenerateAppAttestChallengeResponse\n\nResponse message for the [GenerateAppAttestChallenge](/docs/reference/appcheck/rest/v1/projects.apps/generateAppAttestChallenge#google.firebase.appcheck.v1.TokenExchangeService.GenerateAppAttestChallenge) method.\n\n| JSON representation |\n|------------------------------------------------|\n| ``` { \"challenge\": string, \"ttl\": string } ``` |\n\n| Fields ||\n|-------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `challenge` | `string (`[bytes](https://developers.google.com/discovery/v1/type-format)` format)` A one-time use challenge for the client to pass to the App Attest API. A base64-encoded string. |\n| `ttl` | `string (`[Duration](https://protobuf.dev/reference/protobuf/google.protobuf/#duration)` format)` The duration from the time this challenge is minted until its expiration. This field is intended to ease client-side token management, since the client may have clock skew, but is still able to accurately measure a duration. A duration in seconds with up to nine fractional digits, ending with '`s`'. Example: `\"3.5s\"`. |"]]
