Google.Cloud.RecaptchaEnterprise error on CreateAssessment() - "Request contains an invalid argument" - google-cloud-platform

Question

I'm trying to use the Google.Cloud.RecaptchaEnterprise library to validate captcha requests for the new enterprise key my client has obtained.
string _siteKey = ConfigurationManager.AppSettings["GoogleCaptcha.CheckboxCaptcha.SiteKey"];
string _apiKey = ConfigurationManager.AppSettings["GoogleCaptcha.ApiKey"];
string _projectId = ConfigurationManager.AppSettings["GoogleCaptcha.ProjectId"];
string recaptchaAction = "CreateAccountAssessment";
try {
var appPath = System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath;
string credential_path = appPath + "googlecredentials.json";
System.Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", credential_path);
RecaptchaEnterpriseServiceClient client =
RecaptchaEnterpriseServiceClient.Create();
CreateAssessmentRequest createAssessmentRequest = new CreateAssessmentRequest()
{
Assessment = new Assessment()
{
Event = new Event()
{
SiteKey = _siteKey,
Token = formResponse,
ExpectedAction = "Create_Account"
},
Name = recaptchaAction,
},
Parent = _projectId
};
Assessment response = client.CreateAssessment(createAssessmentRequest);
if (response.TokenProperties.Valid == false)
{
Sitecore.Diagnostics.Log.Error("The CreateAssessment() call failed " +
"because the token was invalid for the following reason: " +
response.TokenProperties.InvalidReason.ToString(), this);
return "Invalid captcha.";
}
else
{
if (response.Event.ExpectedAction == recaptchaAction)
{
Sitecore.Diagnostics.Log.Error("The reCAPTCHA score for this token is: " +
response.RiskAnalysis.Score.ToString(), this);
return "";
}
else
{
Sitecore.Diagnostics.Log.Error("The action attribute in your reCAPTCHA " +
"tag does not match the action you are expecting to score", this);
return "Invalid captcha.";
}
}
}
catch (Exception ex)
{
Sitecore.Diagnostics.Log.Error("Error validating captcha on " + _url + "; " + ex.Message, this);
return "Unable to connect to captcha service.";
}
As far as I can tell all my properties are correct, but it throws an error on Assessment response = client.CreateAssessment(createAssessmentRequest);:
Status(StatusCode="InvalidArgument", Detail="Request contains an invalid argument.", DebugException="Grpc.Core.Internal.CoreErrorDetailException: {"created":"#1621287236.280000000","description":"Error received from peer ipv6:[2607:f8b0:4006:81a::200a]:443","file":"T:\src\github\grpc\workspace_csharp_ext_windows_x64\src\core\lib\surface\call.cc","file_line":1062,"grpc_message":"Request contains an invalid argument.","grpc_status":3}")

Answer 1

I strongly suspect the problem (or at least a problem) is the Parent property of the request.
From the documentation:
The name of the project in which the assessment will be created, in the format "projects/{project}".
... whereas I suspect your project ID is just the ID, rather than the resource name starting with "projects/".
I would recommend using the generated resource name classes as far as possible, with the corresponding properties. So in this case, you'd have:
CreateAssessmentRequest createAssessmentRequest = new CreateAssessmentRequest
{
Assessment = new Assessment
{
Event = new Event
{
SiteKey = _siteKey,
Token = formResponse,
ExpectedAction = "Create_Account"
},
Name = recaptchaAction,
},
ParentAsProjectName = new ProjectName(_projectId)
};