async Task OnAttachementsRequest(ClientAttachementsRequestMessage message, ClientConnection connection)
{
var result = TransactionResultTypes.Unknown;
var userCode = 0L;
var attachementKey = 0;
var container = _chainManager.GetContainer(message.ChainId);
var dataChain = container?.GetDataChain(message.ChainIndex);
var serviceChain = container?.ServiceChain;
var service = container?.Service;
if (container == null || dataChain == null || serviceChain == null)
{
result = TransactionResultTypes.ChainNodeInvalid;
goto end;
}
if (service == null)
{
result = TransactionResultTypes.ChainServiceUnavailable;
goto end;
}
attachementKey = dataChain.AttachementKey;
if (attachementKey < 0)
{
result = TransactionResultTypes.AttachementsNotAllowed;
goto end;
}
Key key = null;
if (message.KeyIndex == Protocol.CoreAccountSignKeyIndex)
{
var coreAccount = _chainManager.CoreChain.GetCoreAccount(message.AccountId);
key = coreAccount?.AccountKey;
}
else
{
var chainAccount = serviceChain.GetValidServiceAccountKey(message.AccountId, message.KeyIndex, Time.Timestamp);
key = chainAccount?.PublicKey;
}
if (key == null)
{
result = TransactionResultTypes.InvalidServiceAccountKey;
goto end;
}
var attachements = message.Attachements.GetSignedItem(key);
if (attachements == null)
{
result = TransactionResultTypes.InvalidSignature;
goto end;
}
if (!attachements.CheckAttachements() || AttachementInfo.IsExpired(attachements))
{
result = TransactionResultTypes.AttachementsInvalid;
goto end;
}
var valid = await service.IsValidAttachementsRequest(attachements);
userCode = valid.UserCode;
if (!valid.IsOK)
{
result = TransactionResultTypes.ChainServiceErrorResponse;
goto end;
}
if (!_attachementManager.AddAttachementsRequests(attachements))
{
result = TransactionResultTypes.AttachementsInvalid;
goto end;
}
// everything seems to be OK
result = TransactionResultTypes.Ok;
end:
await connection.Send(new ClientAttachementsResponseMessage(message, result, userCode, attachementKey));
}