public async Task <string> ProcessCredentialAsync(IAgentContext agentContext, CredentialIssueMessage credential, ConnectionRecord connection)
{
var credentialAttachment = credential.Credentials.FirstOrDefault(x => x.Id == "libindy-cred-0")
?? throw new ArgumentException("Credential attachment not found");
var credentialJson = credentialAttachment.Data.Base64.GetBytesFromBase64().GetUTF8String();
var credentialJobj = JObject.Parse(credentialJson);
var definitionId = credentialJobj["cred_def_id"].ToObject <string>();
var revRegId = credentialJobj["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(
wallet : agentContext.Wallet,
credId : null,
credReqMetadataJson : credentialRecord.CredentialRequestMetadataJson,
credJson : credentialJson,
credDefJson : credentialDefinition.ObjectJson,
revRegDefJson : 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);
}
public async Task <(CredentialRequestMessage, CredentialRecord)> CreateRequestAsync(IAgentContext agentContext, string credentialId)
{
var credential = await GetAsync(agentContext, credentialId);
if (credential.State != CredentialState.Offered)
{
throw new AgentFrameworkException(ErrorCode.RecordInInvalidState,
$"Credential state was invalid. Expected '{CredentialState.Offered}', found '{credential.State}'");
}
var connection = await ConnectionService.GetAsync(agentContext, credential.ConnectionId);
var definition =
await LedgerService.LookupDefinitionAsync(await agentContext.Pool, credential.CredentialDefinitionId);
var provisioning = await ProvisioningService.GetProvisioningAsync(agentContext.Wallet);
var request = await AnonCreds.ProverCreateCredentialReqAsync(agentContext.Wallet, connection.MyDid,
credential.OfferJson,
definition.ObjectJson, provisioning.MasterSecretId);
// Update local credential record with new info
credential.CredentialRequestMetadataJson = request.CredentialRequestMetadataJson;
await credential.TriggerAsync(CredentialTrigger.Request);
await RecordService.UpdateAsync(agentContext.Wallet, credential);
var threadId = credential.GetTag(TagConstants.LastThreadId);
var response = new CredentialRequestMessage
{
Requests = new[] {
new Attachment
{
Id = "libindy-cred-request-0",
MimeType = CredentialMimeTypes.ApplicationJsonMimeType,
Data = new AttachmentContent
{
Base64 = request.CredentialRequestJson.GetUTF8Bytes().ToBase64String()
}
}
}
};
response.ThreadFrom(threadId);
return(response, credential);
}
