private async Task <string> SignAndEncodePresentationRequestBody(
HttpClient client,
V1_GetDidResponse did,
V1_CreatePresentationRequestResponse v1CreatePresentationRequestResponse)
{
var createDidUrl = $"https://{_mattrConfiguration.TenantSubdomain}/v1/messaging/sign";
object didUrlArray;
did.DidDocument.AdditionalProperties.TryGetValue("authentication", out didUrlArray);
var didUrl = didUrlArray.ToString().Split("\"")[1];
var payload = new MattrOpenApiClient.SignMessageRequest
{
DidUrl = didUrl,
Payload = v1CreatePresentationRequestResponse.Request
};
var payloadJson = JsonConvert.SerializeObject(payload);
var uri = new Uri(createDidUrl);
using (var content = new StringContentWithoutCharset(payloadJson, "application/json"))
{
var response = await client.PostAsync(uri, content);
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
var result = await response.Content.ReadAsStringAsync();
return(result);
}
var error = await response.Content.ReadAsStringAsync();
}
return(null);
}
/// <summary>
/// https://learn.mattr.global/tutorials/verify/using-callback/callback-e-to-e
/// </summary>
/// <param name="callbackBaseUrl"></param>
/// <returns></returns>
public async Task <(string QrCodeUrl, string ChallengeId)> CreateVerifyCallback(string callbackBaseUrl)
{
callbackBaseUrl = callbackBaseUrl.Trim();
if (!callbackBaseUrl.EndsWith('/'))
{
callbackBaseUrl = $"{callbackBaseUrl}/";
}
var callbackUrlFull = $"{callbackBaseUrl}{MATTR_CALLBACK_VERIFY_PATH}";
var challenge = GetEncodedRandomString();
HttpClient client = _clientFactory.CreateClient();
var accessToken = await _mattrTokenApiService.GetApiToken(client, "mattrAccessToken");
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("Bearer", accessToken);
client.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json");
var template = await _boInsuranceDbService.GetLastDriverLicensePrsentationTemplate();
// Invoke the Presentation Request
var invokePresentationResponse = await InvokePresentationRequest(
client,
template.DidId,
template.TemplateId,
challenge,
callbackUrlFull);
// Request DID
V1_GetDidResponse did = await RequestDID(template.DidId, client);
// Sign and Encode the Presentation Request body
var signAndEncodePresentationRequestBodyResponse = await SignAndEncodePresentationRequestBody(
client, did, invokePresentationResponse);
// fix strange DTO
var jws = signAndEncodePresentationRequestBodyResponse.Replace("\"", "");
// save to db // TODO add this back once working
var drivingLicensePresentationVerify = new DrivingLicensePresentationVerify
{
DidId = template.DidId,
TemplateId = template.TemplateId,
CallbackUrl = callbackUrlFull,
Challenge = challenge,
InvokePresentationResponse = JsonConvert.SerializeObject(invokePresentationResponse),
Did = JsonConvert.SerializeObject(did),
SignAndEncodePresentationRequestBody = jws
};
await _boInsuranceDbService.CreateDrivingLicensePresentationVerify(drivingLicensePresentationVerify);
var qrCodeUrl = $"didcomm://https://{_mattrConfiguration.TenantSubdomain}/?request={jws}";
return(qrCodeUrl, challenge);
}
