public async Task <IReadOnlyList <IOperation> > GetTransfersInProgressAsync(string walletAddress) { if (string.IsNullOrEmpty(walletAddress)) { throw new ArgumentNullException(nameof(walletAddress)); } return(await _operationsRepository.GetByConditionAsync(x => x.MasterWalletAddress == walletAddress && x.Type == OperationType.TokensTransfer && x.Status == OperationStatus.Accepted)); }