public override async Task <BuiltTransactionResponse> BuildTransaction(BuildTransactionRequest request, ServerCallContext context)
        {
            var res = await _transferService.BuildTransactionAsync(
                Guid.Parse(request.OperationId),
                request.BlockchainId,
                request.BlockchainAssetId,
                request.FromAddress,
                request.FromAddressContext,
                request.ToAddress,
                request.Amount,
                request.IncludeFee);

            var response = new BuiltTransactionResponse()
            {
                TransactionContext = res
            };

            return(response);
        }