/// <summary>
/// Processes the agent message
/// </summary>
/// <param name="agentContext"></param>
/// <param name="messageContext">The agent message agentContext.</param>
/// <returns></returns>
/// <exception cref="AriesFrameworkException">Unsupported message type {messageType}</exception>
public async Task <AgentMessage> ProcessAsync(IAgentContext agentContext, UnpackedMessageContext messageContext)
{
switch (messageContext.GetMessageType())
{
// v1.0
case MessageTypes.PresentProofNames.RequestPresentation:
{
var message = messageContext.GetMessage <RequestPresentationMessage>();
var record = await _proofService.ProcessRequestAsync(agentContext, message, messageContext.Connection);
messageContext.ContextRecord = record;
break;
}
case MessageTypes.PresentProofNames.Presentation:
{
var message = messageContext.GetMessage <PresentationMessage>();
var record = await _proofService.ProcessPresentationAsync(agentContext, message);
messageContext.ContextRecord = record;
break;
}
default:
throw new AriesFrameworkException(ErrorCode.InvalidMessage,
$"Unsupported message type {messageContext.GetMessageType()}");
}
return(null);
}
public static async Task <(ProofRecord holderProofRecord, ProofRecord RequestorProofRecord)> ProofProtocolAsync(
IProofService proofService,
IProducerConsumerCollection <AgentMessage> messages,
ConnectionRecord holderConnection, ConnectionRecord requestorConnection,
IAgentContext holderContext,
IAgentContext requestorContext, ProofRequest proofRequestObject)
{
//Requestor sends a proof request
var(message, requestorProofRecord) = await proofService.CreateRequestAsync(requestorContext, proofRequestObject, requestorConnection.Id);
messages.TryAdd(message);
// Holder accepts the proof requests and builds a proof
var proofRequest = FindContentMessage <RequestPresentationMessage>(messages);
Assert.NotNull(proofRequest);
//Holder stores the proof request
var holderProofRequestRecord = await proofService.ProcessRequestAsync(holderContext, proofRequest, holderConnection);
var holderProofRecord = await proofService.GetAsync(holderContext, holderProofRequestRecord.Id);
var holderProofRequest = JsonConvert.DeserializeObject <ProofRequest>(holderProofRecord.RequestJson);
// Auto satify the proof with which ever credentials in the wallet are capable
var requestedCredentials =
await ProofServiceUtils.GetAutoRequestedCredentialsForProofCredentials(holderContext, proofService,
holderProofRequest);
//Holder accepts the proof request and sends a proof
(var proofMessage, _) = await proofService.CreatePresentationAsync(
holderContext,
holderProofRequestRecord.Id,
requestedCredentials);
messages.TryAdd(proofMessage);
//Requestor retrives proof message from their cloud agent
var proof = FindContentMessage <PresentationMessage>(messages);
Assert.NotNull(proof);
//Requestor stores proof
requestorProofRecord = await proofService.ProcessPresentationAsync(requestorContext, proof);
//Requestor verifies proof
var requestorVerifyResult = await proofService.VerifyProofAsync(requestorContext, requestorProofRecord.Id);
//Verify the proof is valid
Assert.True(requestorVerifyResult);
var requestorProofRecordResult = await proofService.GetAsync(requestorContext, requestorProofRecord.Id);
var holderProofRecordResult = await proofService.GetAsync(holderContext, holderProofRecord.Id);
return(holderProofRecordResult, requestorProofRecordResult);
}
private async Task ScanInvite()
{
var expectedFormat = ZXing.BarcodeFormat.QR_CODE;
var opts = new ZXing.Mobile.MobileBarcodeScanningOptions {
PossibleFormats = new List <ZXing.BarcodeFormat> {
expectedFormat
}
};
var context = await _agentContextProvider.GetContextAsync();
var scanner = new ZXing.Mobile.MobileBarcodeScanner();
var result = await scanner.Scan(opts);
if (result == null)
{
return;
}
AgentMessage message = await MessageDecoder.ParseMessageAsync(result.Text);
switch (message)
{
case ConnectionInvitationMessage invitation:
break;
case RequestPresentationMessage presentation:
RequestPresentationMessage proofRequest = (RequestPresentationMessage)presentation;
var service = message.GetDecorator <ServiceDecorator>(DecoratorNames.ServiceDecorator);
ProofRecord proofRecord = await _proofService.ProcessRequestAsync(context, proofRequest, null);
proofRecord.SetTag("RecipientKey", service.RecipientKeys.ToList()[0]);
proofRecord.SetTag("ServiceEndpoint", service.ServiceEndpoint);
await _recordService.UpdateAsync(context.Wallet, proofRecord);
_eventAggregator.Publish(new ApplicationEvent {
Type = ApplicationEventType.ProofRequestUpdated
});
break;
default:
DialogService.Alert("Invalid invitation!");
return;
}
Device.BeginInvokeOnMainThread(async() =>
{
if (message is ConnectionInvitationMessage)
{
await NavigationService.NavigateToAsync <AcceptInviteViewModel>(message as ConnectionInvitationMessage, NavigationType.Modal);
}
});
}
public async Task ProcessProofInvalidState()
{
//Setup a connection and issue the credentials to the holder
var(issuerConnection, holderConnection) = await Scenarios.EstablishConnectionAsync(
_connectionService, _messages, _issuerWallet, _holderWallet);
await Scenarios.IssueCredentialAsync(
_schemaService, _credentialService, _messages, issuerConnection,
holderConnection, _issuerWallet, _holderWallet, await _holderWallet.Pool, TestConstants.DefaultMasterSecret, true, new List <CredentialPreviewAttribute>
{
new CredentialPreviewAttribute("first_name", "Test"),
new CredentialPreviewAttribute("last_name", "Holder")
});
_messages.Clear();
//Requestor initialize a connection with the holder
var(_, requestorConnection) = await Scenarios.EstablishConnectionAsync(
_connectionService, _messages, _holderWallet, _requestorWallet);
// Verifier sends a proof request to prover
{
var proofRequestObject = new ProofRequest
{
Name = "ProofReq",
Version = "1.0",
Nonce = await AnonCreds.GenerateNonceAsync(),
RequestedAttributes = new Dictionary <string, ProofAttributeInfo>
{
{ "first-name-requirement", new ProofAttributeInfo {
Name = "first_name"
} }
}
};
//Requestor sends a proof request
var(message, _) = await _proofService.CreateRequestAsync(_requestorWallet, proofRequestObject, requestorConnection.Id);
_messages.Add(message);
}
// Holder accepts the proof requests and builds a proof
{
//Holder retrives proof request message from their cloud agent
var proofRequest = FindContentMessage <RequestPresentationMessage>();
Assert.NotNull(proofRequest);
//Holder stores the proof request
var holderProofRequestId = await _proofService.ProcessRequestAsync(_holderWallet, proofRequest, holderConnection);
var holderProofRecord = await _proofService.GetAsync(_holderWallet, holderProofRequestId.Id);
var holderProofObject =
JsonConvert.DeserializeObject <ProofRequest>(holderProofRecord.RequestJson);
var requestedCredentials = new RequestedCredentials();
foreach (var requestedAttribute in holderProofObject.RequestedAttributes)
{
var credentials =
await _proofService.ListCredentialsForProofRequestAsync(_holderWallet, holderProofObject,
requestedAttribute.Key);
requestedCredentials.RequestedAttributes.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = true
});
}
foreach (var requestedAttribute in holderProofObject.RequestedPredicates)
{
var credentials =
await _proofService.ListCredentialsForProofRequestAsync(_holderWallet, holderProofObject,
requestedAttribute.Key);
requestedCredentials.RequestedPredicates.Add(requestedAttribute.Key,
new RequestedAttribute
{
CredentialId = credentials.First().CredentialInfo.Referent,
Revealed = true
});
}
//Holder accepts the proof request and sends a proof
(var proofMessage, var _) = await _proofService.CreatePresentationAsync(_holderWallet, holderProofRequestId.Id,
requestedCredentials);
_messages.Add(proofMessage);
}
//Requestor retrives proof message from their cloud agent
var proof = FindContentMessage <PresentationMessage>();
Assert.NotNull(proof);
//Requestor stores proof
await _proofService.ProcessPresentationAsync(_requestorWallet, proof);
var ex = await Assert.ThrowsAsync <AriesFrameworkException>(async() => await _proofService.ProcessPresentationAsync(_requestorWallet, proof));
Assert.True(ex.ErrorCode == ErrorCode.RecordInInvalidState);
}