/// <inheritdoc />
public virtual async Task ProcessCredentialAsync(Pool pool, Wallet wallet, CredentialMessage credential)
{
var(didOrKey, _) = MessageUtils.ParseMessageType(credential.Type);
var connectionSearch =
await ConnectionService.ListAsync(wallet, new SearchRecordQuery { { TagConstants.MyDid, didOrKey } });
if (!connectionSearch.Any())
{
throw new Exception($"Can't find connection record for type {credential.Type}");
}
var connection = connectionSearch.First();
var(details, _) = await MessageSerializer.UnpackSealedAsync <CredentialDetails>(credential.Content,
wallet, connection.MyVk);
var offer = JObject.Parse(details.CredentialJson);
var definitionId = offer["cred_def_id"].ToObject <string>();
var schemaId = offer["schema_id"].ToObject <string>();
var revRegId = offer["rev_reg_id"]?.ToObject <string>();
var credentialSearch =
await RecordService.SearchAsync <CredentialRecord>(wallet, new SearchRecordQuery
{
{ TagConstants.SchemaId, schemaId },
{ TagConstants.DefinitionId, definitionId },
{ TagConstants.ConnectionId, connection.GetId() }
}, null, 1);
var credentialRecord = credentialSearch.Single();
// TODO: Should throw or resolve conflict gracefully if multiple credential records are found
var credentialDefinition = await LedgerService.LookupDefinitionAsync(pool, connection.MyDid, definitionId);
string revocationRegistryDefinitionJson = null;
if (!string.IsNullOrEmpty(revRegId))
{
// If credential supports revocation, lookup registry definition
var revocationRegistry =
await LedgerService.LookupRevocationRegistryDefinitionAsync(pool, connection.MyDid, revRegId);
revocationRegistryDefinitionJson = revocationRegistry.ObjectJson;
}
var credentialId = await AnonCreds.ProverStoreCredentialAsync(wallet, null,
credentialRecord.CredentialRequestMetadataJson,
details.CredentialJson, credentialDefinition.ObjectJson, revocationRegistryDefinitionJson);
credentialRecord.CredentialId = credentialId;
await credentialRecord.TriggerAsync(CredentialTrigger.Issue);
await RecordService.UpdateAsync(wallet, credentialRecord);
}
/// <inheritdoc />
public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
JsonSerializer serializer)
{
var item = JObject.Load(reader);
var(_, messageType) = MessageUtils.ParseMessageType(item["@type"].ToObject <string>());
IContentMessage message;
switch (messageType)
{
case MessageTypes.ConnectionRequest:
message = new ConnectionRequestMessage();
break;
case MessageTypes.ConnectionResponse:
message = new ConnectionResponseMessage();
break;
case MessageTypes.CredentialOffer:
message = new CredentialOfferMessage();
break;
case MessageTypes.CredentialRequest:
message = new CredentialRequestMessage();
break;
case MessageTypes.Credential:
message = new CredentialMessage();
break;
case MessageTypes.ProofRequest:
message = new ProofRequestMessage();
break;
case MessageTypes.DisclosedProof:
message = new ProofMessage();
break;
default: throw new TypeLoadException("Unsupported serialization type.");
}
serializer.Populate(item.CreateReader(), message);
return(message);
}
/// <inheritdoc />
public virtual async Task IssueCredentialAsync(IAgentContext agentContext, string issuerDid, string credentialId,
Dictionary <string, string> values)
{
var credential = await GetAsync(agentContext, credentialId);
if (credential.State != CredentialState.Requested)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Credential state was invalid. Expected '{CredentialState.Requested}', found '{credential.State}'");
}
var credentialCopy = credential.DeepCopy();
if (values != null && values.Count > 0)
{
credential.ValuesJson = CredentialUtils.FormatCredentialValues(values);
}
var definitionRecord =
await SchemaService.GetCredentialDefinitionAsync(agentContext.Wallet, credential.CredentialDefinitionId);
var connection = await ConnectionService.GetAsync(agentContext, credential.ConnectionId);
if (connection.State != ConnectionState.Connected)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Connection state was invalid. Expected '{ConnectionState.Connected}', found '{connection.State}'");
}
string revocationRegistryId = null;
BlobStorageReader tailsReader = null;
if (definitionRecord.SupportsRevocation)
{
var revocationRecordSearch = await RecordService.SearchAsync <RevocationRegistryRecord>(
agentContext.Wallet, SearchQuery.Equal(nameof(RevocationRegistryRecord.CredentialDefinitionId), definitionRecord.Id), null, 5);
var revocationRecord = revocationRecordSearch.Single(); // TODO: Credential definition can have multiple revocation registries
revocationRegistryId = revocationRecord.Id;
tailsReader = await TailsService.OpenTailsAsync(revocationRecord.TailsFile);
}
var issuedCredential = await AnonCreds.IssuerCreateCredentialAsync(agentContext.Wallet, credential.OfferJson,
credential.RequestJson, credential.ValuesJson, revocationRegistryId, tailsReader);
if (definitionRecord.SupportsRevocation)
{
await LedgerService.SendRevocationRegistryEntryAsync(agentContext.Wallet, agentContext.Pool, issuerDid,
revocationRegistryId,
"CL_ACCUM", issuedCredential.RevocRegDeltaJson);
credential.CredentialRevocationId = issuedCredential.RevocId;
}
var msg = new CredentialMessage
{
CredentialJson = issuedCredential.CredentialJson,
RevocationRegistryId = revocationRegistryId
};
await credential.TriggerAsync(CredentialTrigger.Issue);
await RecordService.UpdateAsync(agentContext.Wallet, credential);
try
{
await MessageService.SendAsync(agentContext.Wallet, msg, connection);
}
catch (Exception e)
{
await RecordService.UpdateAsync(agentContext.Wallet, credentialCopy);
throw new AgentFrameworkException(ErrorCode.A2AMessageTransmissionError, "Failed to send credential request message", e);
}
}
/// <inheritdoc />
public virtual async Task <string> ProcessCredentialAsync(IAgentContext agentContext, CredentialMessage credential, ConnectionRecord connection)
{
var offer = JObject.Parse(credential.CredentialJson);
var definitionId = offer["cred_def_id"].ToObject <string>();
var schemaId = offer["schema_id"].ToObject <string>();
var revRegId = offer["rev_reg_id"]?.ToObject <string>();
// TODO: Replace this with thread lookup
// Currently, this is unable to process multiple offers and requests reliably
var credentialSearch =
await RecordService.SearchAsync <CredentialRecord>(agentContext.Wallet,
SearchQuery.And(
SearchQuery.Equal(nameof(CredentialRecord.SchemaId), schemaId),
SearchQuery.Equal(nameof(CredentialRecord.CredentialDefinitionId), definitionId),
SearchQuery.Equal(nameof(CredentialRecord.ConnectionId), connection.Id),
SearchQuery.Equal(nameof(CredentialRecord.State), CredentialState.Requested.ToString("G"))
), null, 5);
if (credentialSearch.Count == 0)
{
throw new AgentFrameworkException(ErrorCode.RecordNotFound, "Credential record not found");
}
var credentialRecord = credentialSearch.Single();
// TODO: Should resolve if multiple credential records are found
if (credentialRecord.State != CredentialState.Requested)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Credential state was invalid. Expected '{CredentialState.Requested}', found '{credentialRecord.State}'");
}
var credentialDefinition = await LedgerService.LookupDefinitionAsync(agentContext.Pool, definitionId);
string revocationRegistryDefinitionJson = null;
if (!string.IsNullOrEmpty(revRegId))
{
// If credential supports revocation, lookup registry definition
var revocationRegistry =
await LedgerService.LookupRevocationRegistryDefinitionAsync(agentContext.Pool, revRegId);
revocationRegistryDefinitionJson = revocationRegistry.ObjectJson;
}
var credentialId = await AnonCreds.ProverStoreCredentialAsync(agentContext.Wallet, null,
credentialRecord.CredentialRequestMetadataJson,
credential.CredentialJson, credentialDefinition.ObjectJson, revocationRegistryDefinitionJson);
credentialRecord.CredentialId = credentialId;
await credentialRecord.TriggerAsync(CredentialTrigger.Issue);
await RecordService.UpdateAsync(agentContext.Wallet, credentialRecord);
EventAggregator.Publish(new ServiceMessageProcessingEvent
{
RecordId = credentialRecord.Id,
MessageType = credential.Type,
});
return(credentialRecord.Id);
}
/// <inheritdoc />
public virtual async Task <(CredentialMessage, CredentialRecord)> CreateCredentialAsync(IAgentContext agentContext, string issuerDid, string credentialId,
IEnumerable <CredentialPreviewAttribute> values)
{
var credential = await GetAsync(agentContext, credentialId);
if (credential.State != CredentialState.Requested)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Credential state was invalid. Expected '{CredentialState.Requested}', found '{credential.State}'");
}
if (values != null && values.Any())
{
credential.CredentialAttributesValues = values;
}
var definitionRecord =
await SchemaService.GetCredentialDefinitionAsync(agentContext.Wallet, credential.CredentialDefinitionId);
var connection = await ConnectionService.GetAsync(agentContext, credential.ConnectionId);
if (connection.State != ConnectionState.Connected)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Connection state was invalid. Expected '{ConnectionState.Connected}', found '{connection.State}'");
}
string revocationRegistryId = null;
BlobStorageReader tailsReader = null;
if (definitionRecord.SupportsRevocation)
{
var revocationRecordSearch = await RecordService.SearchAsync <RevocationRegistryRecord>(
agentContext.Wallet, SearchQuery.Equal(nameof(RevocationRegistryRecord.CredentialDefinitionId), definitionRecord.Id), null, 5);
var revocationRecord = revocationRecordSearch.Single(); // TODO: Credential definition can have multiple revocation registries
revocationRegistryId = revocationRecord.Id;
tailsReader = await TailsService.OpenTailsAsync(revocationRecord.TailsFile);
}
var issuedCredential = await AnonCreds.IssuerCreateCredentialAsync(agentContext.Wallet, credential.OfferJson,
credential.RequestJson, CredentialUtils.FormatCredentialValues(credential.CredentialAttributesValues), revocationRegistryId, tailsReader);
if (definitionRecord.SupportsRevocation)
{
var paymentInfo = await PaymentService.GetTransactionCostAsync(agentContext, TransactionTypes.REVOC_REG_ENTRY);
await LedgerService.SendRevocationRegistryEntryAsync(context : agentContext,
issuerDid : issuerDid,
revocationRegistryDefinitionId : revocationRegistryId,
revocationDefinitionType : "CL_ACCUM",
value : issuedCredential.RevocRegDeltaJson,
paymentInfo : paymentInfo);
credential.CredentialRevocationId = issuedCredential.RevocId;
if (paymentInfo != null)
{
await RecordService.UpdateAsync(agentContext.Wallet, paymentInfo.PaymentAddress);
}
}
await credential.TriggerAsync(CredentialTrigger.Issue);
await RecordService.UpdateAsync(agentContext.Wallet, credential);
var threadId = credential.GetTag(TagConstants.LastThreadId);
var credentialMsg = new CredentialMessage
{
CredentialJson = issuedCredential.CredentialJson,
RevocationRegistryId = revocationRegistryId
};
credentialMsg.ThreadFrom(threadId);
return(credentialMsg, credential);
}
/// <inheritdoc />
public virtual async Task <string> ProcessCredentialAsync(IAgentContext agentContext, CredentialMessage credential, ConnectionRecord connection)
{
var offer = JObject.Parse(credential.CredentialJson);
var definitionId = offer["cred_def_id"].ToObject <string>();
var revRegId = offer["rev_reg_id"]?.ToObject <string>();
var credentialRecord = await this.GetByThreadIdAsync(agentContext, credential.GetThreadId());
if (credentialRecord.State != CredentialState.Requested)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Credential state was invalid. Expected '{CredentialState.Requested}', found '{credentialRecord.State}'");
}
var credentialDefinition = await LedgerService.LookupDefinitionAsync(await agentContext.Pool, definitionId);
string revocationRegistryDefinitionJson = null;
if (!string.IsNullOrEmpty(revRegId))
{
// If credential supports revocation, lookup registry definition
var revocationRegistry =
await LedgerService.LookupRevocationRegistryDefinitionAsync(await agentContext.Pool, revRegId);
revocationRegistryDefinitionJson = revocationRegistry.ObjectJson;
}
var credentialId = await AnonCreds.ProverStoreCredentialAsync(agentContext.Wallet, null,
credentialRecord.CredentialRequestMetadataJson,
credential.CredentialJson, credentialDefinition.ObjectJson, revocationRegistryDefinitionJson);
credentialRecord.CredentialId = credentialId;
credentialRecord.CredentialAttributesValues = null;
await credentialRecord.TriggerAsync(CredentialTrigger.Issue);
await RecordService.UpdateAsync(agentContext.Wallet, credentialRecord);
EventAggregator.Publish(new ServiceMessageProcessingEvent
{
RecordId = credentialRecord.Id,
MessageType = credential.Type,
ThreadId = credential.GetThreadId()
});
return(credentialRecord.Id);
}